| Numerics |
| 2F |
Two-Fiber |
| 3G |
3rd Generation |
| 4C |
Consortium of Intel, IBM, Matsushita, and Toshiba |
| 4F |
Four-Fiber |
| 5C |
Consortium of Intel, Sony, Matsushita, Toshiba, and Hitachi |
| 10 GbE |
10 Gigabit Ethernet |
| 10 GFC |
10 Gigabit Fibre Channel (Same as FC1200) |
| A |
| A-TDMA |
Advanced Time Division Multiple Access |
| A/D |
Analog-to-Digital |
| AAL |
ATM Adaptation Layer |
| AAL0 |
ATM Adaptation Layer Type 0 |
| AAL1 |
ATM Adaptation Layer Type 1 |
| AAL2 |
ATM Adaptation Layer 2 Transport |
| AAL3/4 |
ATM Adaptation Layer Type 3 and 4 |
| AAL5 |
ATM Adaptation Layer 5 |
| ABR |
Available Bit Rate |
| ABT |
Advanced BiCMOS Technology |
| AC |
Alternating Current; Administrative Complex; Atomic Clock |
| AC-3 |
Audio Coding Revision 3 |
| ACAC |
Actual Call Admission Control |
| ACEG |
Alternating Current Equipment Ground |
| ACK |
Acknowledge |
| ACL |
Active Control List; Access Control List |
| ACO |
Alarm Cutoff |
| ACQ |
Acquire |
| ACR |
Allowed Cell Rate |
| ACS |
Automatic Channel Shutdown; Alarm Correlation and Suppression |
| ACSE |
Association Control Service Element |
| ACSS |
Automatic Channel Shutdown Suppression; Automatic Channel Shutdown State |
| ACT |
Active |
| ADC |
Analog-to-Digital Converter; Add/Drop Coupler |
| ADI |
Asset Distribution Interface |
| ADM |
Add/Drop Multiplexer |
| ADP |
Actual Departure Potential |
| ADSL |
Asymmetric Digital Subscriber Line |
| ADT |
Actual Departure Time |
| AE |
Automation Engine |
| AES |
Advanced Encryption Standard |
| AESA |
ATM End System Address |
| AFI |
Authority and Format Identifier |
| AFM |
APS Mode Mismatch Failure |
| AGC |
Automatic Gain Control |
| AGGR |
Aggregate |
| AID |
Access Identifier |
| AIM |
Auto Image Management; Active Inventory Map |
| AINI |
ATM Inter-Network Interface |
| AINS |
Automatic in Service State |
| AIR |
Additive Increase Rate |
| AIS |
Alarm Indication Signal |
| AIS-L |
Alarm Indication Signal - Line |
| AIS-P |
Alarm Indication Signal - Path |
| AIS-S |
Alarm Indication Signal - Section |
| AIS-V |
VT Alarm Indication Signal |
| AISDP |
Alarm Indication Signal Decay Period |
| AISIP |
Alarm Indication Signal Integration Period |
| ALMLED2U |
Alarm LED 2 RU (Online Edge Platform) |
| ALS |
Automatic Laser Shutdown |
| AM |
Amplitude Modulation; Application Manager |
| AMF |
APS Mode Mismatch Failure |
| AMI |
Access Method Interface; Alternate Mark Inversion |
| AMM |
Alarm Management Module; Auxiliary Management Module |
| AMP |
Amplifier |
| AMS |
Asset Management System |
| ANSI |
American National Standards Institute |
| AO |
Autonomous Output |
| AOD |
Advertising on Demand |
| APC |
Angled Physical Contact |
| APD |
Avalanche PhotoDiode |
| API |
Application Program Interface |
| APS |
Automatic Protection Switching |
| APSBF |
Automatic Protection Switching Byte Failure |
| APSCM |
Automatic Protection Switching Channel Mismatch |
| APSMM |
Automatic Protection Switching Mode Mismatch |
| ARC |
Alarm Reporting Control |
| ARP |
Address Resolution Protocol |
| ARPU |
Average Revenue per Unit (or User) |
| AS |
Autonomous System |
| ASAP |
Alarm Severity Assignment Profile |
| ASCII |
American Standard Code for Information Interchange |
| ASD |
Access Security Device |
| ASE |
Amplified Spontaneous Emission |
| ASI |
Asynchronous Serial Interface |
| AsiaPac |
Asia Pacific |
| ASIC |
Application-Specific Integrated Circuit |
| ASN.1 |
Abstract Syntax Notation One |
| ASP |
Applications Service Provider; Average Selling Price |
| ASYNC |
Asynchronous |
| AT |
Advanced Technology |
| AT&T |
American Telephone and Telegraph Company |
| ATA |
Advanced Technology Attachment |
| ATAF |
ATM Test Access Function |
| ATAG |
Autonomous Tag |
| ATAGSEQ |
Autonomous Tag Sequence |
| ATDMA |
Asynchronous Time Division Multiple Access |
| ATM |
Asynchronous Transfer Mode |
| ATM SAM |
ATM Service Access Multiplexer |
| ATMVCL |
ATM Virtual Channel Link |
| ATMVPL |
ATM Virtual Path Link |
| ATTN |
Attenuator |
| AU/AU-x |
Administrative Unit |
| AU-n |
Administrative Unit "n" |
| AUG |
Administrative Unit Group |
| AUX |
Auxiliary |
| AVC |
Attribute Value Change |
| AWG |
American Wire Gauge |
| AWGN |
Additive White Gaussian Noise |
| B |
| B-DCS |
Broadband Digital Cross-connect System |
| B-PON |
Broadband Passive Optical Network |
| B-RAS |
Broadband Remote Access Server |
| B/P |
Backplane |
| B3ZS |
Bipolar With 3-Zero Substitution |
| B6ZS |
Bipolar With 6-Zero Substitution |
| B8ZS |
Bipolar With 8-Zero Substitution |
| BA |
Booster Amplifier |
| BB |
Broadband |
| BBE |
Background Block Error |
| BBE-RS |
Background Block Error Regenerator Section (an SDH regenerator section error) |
| BBER |
Background Block Error Ratio |
| BC |
Business Continuity |
| BCD |
Binary-Coded Decimal |
| BCST |
Broadcast |
| BDFB |
Battery Distribution Fuse Bay |
| BE |
Block Error; Best Effort |
| BE-RS |
Block Errors-Regenerative Section |
| BECN |
Backward Explicit Congestion Notification |
| BELLCORE |
BELL Communications Research, Inc. |
| BER |
Bit Error Rate |
| BER-SD-P |
Path Signal Degrade BER |
| BER-SF-P |
Path Signal Failure BER |
| BERT |
Bit Error Rate Test |
| BFP |
Back Facet Power |
| BGP |
Border Gateway Protocol |
| BGP4 |
Border Gateway Protocol, version 4 |
| BICI |
Broadband Inter-Carrier Interfaces; B-ISDN Inter-carrier Interface |
| BICSI |
Building Industry Consulting Services International |
| BIOS |
Basic Input/Output System |
| BIP |
Bit Interleaved Parity |
| BIT |
Built-In Test |
| BITS |
Building Integrated Timing System |
| bits/sym |
Bits per Symbol |
| BLSR |
Bidirectional Line Switched Ring |
| BML |
Business Management Layer |
| BNC |
Bayonet Neill-Concelman |
| BOC |
Bell Operating Company |
| BOL |
Beginning of Life |
| BOM |
Bill of Materials |
| BONDING |
Bandwidth ON Demand Interoperability Group |
| BOOTP |
Bootstrap Protocol |
| BP |
Backplane |
| BPI |
Baseline Privacy Interface |
| BPI+ |
Baseline Privacy Interface Plus |
| BPP |
Backplane Protocol |
| bps |
bits per second |
| BPSR |
Bidirectional Path Switched Ring |
| BPT |
Band Pass-Through |
| BPV |
BiPolar Violations |
| BRI |
Basic Rate Interface |
| BRM |
Backward RM |
| BSC |
Board SC Connector |
| BSP |
Board Support Package |
| BSS |
Business Support System |
| BT |
British Telecom; Burst Tolerance |
| Btag |
Beginning Tag |
| BTM |
Bits Termination Circuit Pack |
| BTS |
Business Telecom Services |
| BTU/hr |
British Thermal Unit per hour |
| BW |
Bandwidth |
| BWDM |
Band Wavelength Division Multiplexer |
| BYT |
Total Byte Count |
| C |
| C |
Celsius; Critical |
| C2O |
Cable to Optic |
| CA |
Content Archived |
| CAB |
Conformity Assessment Body |
| CAC |
Connection Admission Control; Call Admission Control |
| CAD |
Computer Aided Design |
| CALA |
Central America and Latin America |
| CAM |
Content Addressable Memory |
| CAPEX |
Capital Expenditure |
| CAS |
Channel Associated Signaling |
| CATV |
Community Antenna Television; Cable Television |
| CB, C/B |
Circuit Breaker |
| C-BAE |
C-Band Amplifier Equalizer |
| C-BAM |
C-Band Amplifier Monitor |
| CBN |
Common Bonding Network |
| CBR |
Constant Bit Rate |
| CC |
Cross Connection; Clear Channel |
| CCB |
Configuration Control Board |
| CCC |
Cross Connect Controller |
| CCCG |
Cross Connection and Control Group |
| CCC-PC |
CCC Processor Card |
| CCDF |
Complementary Cumulative Distribution Function |
| CCI |
Content Control Information |
| CCITT |
Consultative Committee on International Telegraphy and Telephony |
| CCK |
Complimentary Code Keying |
| CCW |
Counterclockwise |
| CCC-XC |
CCC Cross Connect Card |
| CCC768 |
Cross Connect Fabric with 768x768 STS-1 capacity |
| CD |
Compact Disc; CoreDirector®; Chromatic Dispersion |
| CDD |
CoreDirector® Designer Software Tool |
| CDE |
Common Desktop Environment (UNIX) |
| CDR |
Call Detail Recording; Clock and Data Recovery |
| CD-ROM |
Compact Disc Read Only Memory |
| CDE |
Common Desktop Environment |
| CDMA |
Code Division Multiple Access |
| CDP |
Contracted Deadline Potential |
| CDT |
Connection Dropping Threshold |
| CDTS |
Chromatic Dispersion Test Set |
| CDV |
Cell Delay Variation |
| CDVT |
Cell Delay Variation Tolerance |
| CD-WO |
Compact Disc - Write One |
| CE |
Consumer Electronics |
| CEA |
Consumer Electronics Association |
| CER |
Cell Error Ratio; Codeword Error Ration |
| CES |
Circuit Emulation Service |
| CEV |
Controlled Environmental Vault |
| CFG |
Configuration |
| CFM |
Cubic Feet per Minute |
| CFU |
Cooling Fan Unit |
| CH |
Channel |
| CHASEH |
Environmentally Hardened Chassis |
| CHASSIS-e |
Old Chassis Type |
| CHASYNC |
Chassis with Sync |
| C/I |
Carrier-to-Interface Ratio |
| CI |
Compact Intelligence; Craft Interface; Customer Interface; Certified Integrator |
| CID |
Circuit Identification; Craft Interface Device |
| CIF |
Client Interface |
| CIFS |
Common Internet File System |
| CIM |
Client Interface Module |
| CINOT |
Ciena Optical Transport System |
| CIR |
Customer Information Release |
| CIT |
Craft Interface Terminal; Craft Interface Tool |
| CL |
Coupling Loss; Cleared |
| CLEC |
Competitive Local Exchange Carrier |
| CLEI |
Common Language Equipment Identifier |
| CLEITM |
Common Language Equipment Identifier |
| CLFI |
Common Language Facility Identifier |
| CLI |
Command Line Interface |
| CLIP |
Calling Line Identification Presentation |
| CLIR |
Calling Line Identification Restriction |
| CLLI |
Common Language Location Identifier |
| CLNP |
Connectionless Network Layer Protocol |
| CLNS |
Connectionless Network Service |
| CLP |
Cell Loss Priority |
| CLR |
Cell Loss Ratio |
| CLTP |
Connectionless Transport Protocol |
| cm |
centimeter |
| CM |
Control Module; Cable Modem |
| CM-CLI |
Control Module Command Line Interface |
| CMF |
Channel Mismatch Failure; Client Management Frame |
| CMIP |
Common Management Information Protocol |
| CMIS |
Common Management Information Services |
| CMISE |
Common Management Information Service Element |
| CMO |
Ciena Management Object |
| CMR |
Cell Misinsertion Rate |
| CMS |
Call Management Server |
| CMTS |
Cable Modem Termination System |
| CMU |
Clock Multiplier Unit |
| C-n |
Container C-11=1,544 Mb/s; C-12=2,048 Mb/s; C-2=6,312 Mb/s; C-3=34,368 Mb/s and 44,736 Mb/s; C-4=139,264 Mb/s |
| CNIPS |
Core Network Integrated Planning System |
| CNIR |
Carrier-to-Noise/Ingress Ratio |
| CNMP |
Customer Network Management Portal |
| CNR |
Carrier-to-Noise Ration |
| CO |
Central Office |
| COADM |
Configurable Optical Add/Drop Multiplexer |
| COBRA |
Copper and Optical Broadband Remote Access |
| CODEC |
Coder/Decoder |
| COE |
Central Office Equipment |
| COFA |
Change of Frame Alignment |
| COM |
Ciena's inter-processor communications system |
| COLD |
Central Office Layout Design |
| COLL |
Collision Count |
| CONDTYPE |
Condition Type |
| CONS |
Connection Oriented Network Service |
| COPS |
Common Open Policy Services |
| CORBA |
Common Object Request Broker Architecture |
| CoS Class of Service |
|
| COS |
Class of Service; Common Object Services |
| COT |
Central Office Terminal |
| COTS |
Commercial off the Shelf |
| CP |
Circuit Pack; Control Processor; Connection Provisioner; Call Processing; Customer Premise |
| CPCI |
Compact Peripheral Component Interconnect |
| CPD |
Common Path Distortion |
| CPE |
Customer Premises Equipment; Customer Provided Equipment |
| C-Plane |
Control Plane |
| CPLD |
Complex Programmable Logic Device |
| CPM |
Cross-Phase Modulation |
| CPRM |
Content Protection for Recordable Media |
| CPT |
Channel Pass-Through |
| CPTTAG |
Connection Termination Point Tag |
| CPU |
Central Processing Unit |
| CR |
Circuit Reliability; Carriage Return; Critical Alarm |
| CRC |
Cyclic Redundancy Check |
| CRG |
Circuit Restoration Group |
| CRIP |
CIENA Routing Information Protocol |
| CR-LDP |
Constraint-based Routing Label Distribution Protocol |
| CRS |
Cross Connect |
| CRT |
Cathode Ray Tube |
| CRx Line |
Client Receive Line |
| CS |
Control Sub-span; Convergence Sublayer; CoreStream |
| CSA |
Canadian Standards Association |
| CSD |
Core Switching Division |
| CSES |
Consecutive Severely Errored Seconds |
| Csh |
C Shell |
| CSH |
Common Signal Header |
| CSI |
Convergence Sublayer Indicator |
| CSM |
Core Switching Manager |
| C-SMF |
Conventional Single Mode Fiber |
| CSO |
Composite Second Order |
| CSP |
Customer Service Profile |
| CSR |
Customer Service Representative |
| CS-RZ |
Carrier-Suppressed Return-to-Zero |
| CST |
Central Standard Time |
| CSU |
Channel Service Unit; Customer Service Unit |
| CSV |
Comma-Separated Value |
| CT |
Critical |
| Ctag |
Correlation Tag |
| CTAM |
Cable & Telecommunications Association for Marketing |
| CTB |
Composite Triple Beat |
| CTC |
Common Transmit Clock |
| CTD |
Cell Transfer Delay |
| CTG |
Cradle-To-Grave |
| CTM |
Core Transport Manager |
| CTN |
Core Transmission Network |
| CTP |
Connection Termination Point |
| CTS |
Clear To Send |
| CTx Line |
Client Transmit Line |
| CUG |
Closed User Group |
| CV |
Code Violation |
| CV-FE |
Code violation - Far End |
| CV-L |
Code Violation - Line |
| CV-P |
Code Violation - Path |
| CV-PFE |
Code Violation - Path Far End |
| CV-S, CVS |
Code Violation - Section; Code Violation -- Seconds |
| CW |
Clockwise; Continuous Wave |
| CWDM |
Coarse Wave Division Multiplexing; Coarse Wavelength Division Multiplex |
| CWDM-U |
Coarse Wavelength Division Multiplexing - UPSR |
| D |
| D/A |
Digital-to-Analog |
| DAC |
Digital to Analog Converter; Digital Addressable Controller |
| DACS |
Digital Access and Cross-Connect System |
| DAD |
Direct Access Devise |
| DADM |
Data Add/Drop Multiplexer |
| DAS |
Direct Attached Storage |
| dB |
decibel |
| DB |
Database |
| DBA |
Dynamic Bandwidth Assignment |
| dBc |
Decibel referenced to the carrier |
| dBm |
Decibel reference in milliwatts |
| DBMS |
Database Management System |
| DBPSK |
Differential Binary Phase Shift Keying |
| DBS |
Direct Broadcast Satellite |
| DB-9 |
Data Bus 9 Pin Connector |
| DC |
Direct Current; Data Connection |
| D&C |
Drop and Continue |
| DCC |
Data Communications Channel |
| DCE |
Data Communications Equipment; Data Circuit Terminating Equipment |
| DCF |
Dispersion-Compensating Fiber |
| DCG |
Dispersion Compensation Grating |
| DCM |
Dispersion Compensation Module |
| DCN |
Data Communication Network |
| DCOM |
Distributed Component Object Model |
| DCP |
Digital Communications Protocol; Device Control Protocol |
| DCS |
Digital Cross-connect System; Digital Connection System |
| DDI |
Direct Dialing Inward |
| DDS |
Digital Data Storage; Digital Data Service; Digital Data System; Digital Data Stream |
| DE |
Discard Eligible |
| DEC |
Digital Electrical Carrier |
| DEG |
Degraded Signal |
| DEMUX |
Demultiplexer |
| DENI |
Digital Entertainment Networking Initiative |
| DENY |
Transaction Denier |
| DFB |
Distributed Feedback |
| DG |
Disc Group |
| DGD |
Differential Group Delay |
| DHCP |
Dynamic Host Configuration Protocol |
| DHWG |
Digital Home Working Group |
| D/I |
Drop and Insert |
| DIO |
Digital Input/Output |
| DIP |
Dual In-line Package (switch) |
| DIR |
Direction |
| DiffServ |
Differentiated Services |
| Div |
Division |
| DLC |
Digital Loop Carrier |
| DLCI |
Data Link Connection Identifier |
| DLL |
Dynamic Link Library; Data Lind Layer (driver); Downline Load |
| DLT |
Digital Linear Tape Drives |
| DM |
Degraded Minute; Dispersion Mitigation |
| DMA |
Direct Memory Access |
| DMACS |
Distributed Monitoring and Control System |
| DMB |
Digital Multipoint Bridge; Document Maintenance Bulletin |
| DMC |
Dual Modem Cards |
| DMH |
Degraded Modem Hours |
| DMM |
Digital Multi-Meter |
| DMOP |
Detailed Method of Procedure |
| DMS |
Dispersion-managed Solution |
| DMUX |
[Optical] Demultiplexer |
| DN |
Data Node |
| DNCS |
Digital Network Control System |
| DNR |
Do Not Revert |
| DNS |
Domain Name Server; Domain Name System |
| DOCSIS |
Data-Over-Cable Service Interface Specifications |
| DOS |
Disk Operating System |
| DoS |
Denial of Service |
| DPDT |
Double-Pole, Double-Throw |
| DPFI |
Data Plane Fault Isolation |
| DPI |
Digital Program Insertion |
| DPR |
Dedicated Protection Ring |
| DPRAM |
Dual Port Random Access Memory |
| DPT |
Dynamic Packet Transport |
| DQ |
Degraded Quality Level |
| DQDB |
Distributed Queue Dual Bus |
| DQoS |
Dynamic Quality of Service; Deploying Quality of Service |
| DQPSK |
Differential Quadrature Phase Shift Keying |
| DR |
Disaster Recovery |
| DRAM |
Dynamic Random Access Memory |
| DRM |
Digital Rights Management |
| DS |
Digital Signal; Downstream |
| DS0 |
Digital Signal Level 0 (64 Kb/s data/voice channel) |
| DS1 |
Digital Signal Level 1 (T1 equivalent) |
| DS3 |
Digital Signal Level 3 (T3 equivalent) |
| DSCP |
Differentiated Service Code Point |
| DSCRDS |
Discard Count |
| DSF |
Dispersion Shifted Fiber |
| DSL |
Digital Subscriber Line; Digital Subscriber Loop |
| DSLAM |
Digital Subscriber Line Access Multiplexer |
| DS-n |
Digital Signal, level n |
| DSP |
Digital Signal Processor |
| DSS2 |
Digital Subscriber Signaling 2 |
| DSTB |
Digital Set-top Box |
| DSX |
Digital Side Interface |
| DSX-1 |
Digital Signal Level 1 Cross Connect |
| DS-x |
Digital Signal where N denotes multiple of 51.84 Mb/s |
| DSX-3 |
Digital Signal Level 3 Cross Connect |
| DT |
Decision Technology; Direct Termination |
| DTCP |
Digital Transmission Content Protection |
| DTE |
Data Terminal Equipment |
| DTL |
Designated Transit List |
| DTMF |
Dual Tone Multi-Frequency |
| DTS |
Dynamic Transport System |
| DTV |
Digital Television |
| DUART |
Dual Universal Asynchronous Receiver Transmitter |
| DUP |
Data User Part |
| DUS |
Don't Use Synchronization |
| DV |
Digital Video |
| DVB-ASI |
Digital Video Broadcast Asynchronous Serial Interface |
| DVC |
Dynamic Virtual Concatenation |
| DVD |
Digital Versatile Disc |
| DVD+R |
Recordable Digital Versatile Disc |
| DVD+RW |
Rewritable Digital Versatile Disc |
| DVI |
Display Visual Interface |
| DVM |
Digital Voltmeter |
| DVOW |
Digital Voice Orderwire |
| DVR |
Digital Video Recorder |
| DW |
Datawire |
| DWDM |
Dense Wavelength Division Multiplexing |
| DXC |
Digital Cross-Connect |
| DXI |
Data Exchange Interface |
| E |
| E1 |
European Equivalent of T1 (2.048 Mb/s signal speed) |
| E2E |
End To End |
| E2PROM |
Electrically Erasable Programmable Read Only Memory |
| E3 |
European data signal at a rate of 34.368 Mb/s |
| EAL |
Events, Alarms, and Logging |
| EAI |
Enterprise Application Integration |
| EAP |
Extensible Authentication Protocol |
| EAS |
Emergency Alert System |
| EB |
Error Block; Eastbound |
| EBEM |
Enhanced Bus Extender Module |
| EC-1 |
Electrical Carrier Level 1 (STS1 Equivalent) |
| ECC |
Edge Card Control; Embedded Communications Channel |
| ECI |
Equipment Catalog Item |
| ECLR |
Egress Cell Loss Ratio |
| ECn |
Electrical Carrier, level n; 0=64 kb/s, 2=6,312 Mb/s, 3=44,736 Mb/s |
| ECN |
Engineering Change Notice |
| ECO |
Engineering Change Order |
| ED |
Equipment Degrade |
| EDF |
Erbium-Doped Fiber |
| EDFA |
Erbium-Doped Fiber Amplifier |
| eDOCSIS |
Embedded Data-Over-Cable Service Interface Specifications |
| EEE |
Electronic Equipment Enclosure |
| EEPROM |
Electrically Erasable Programmable Read Only Memory |
| EF&I |
Engineer, Furnish and Install |
| EF |
Equipment Failure |
| EFCI |
Explicit Forward Congestion Indication |
| EFD |
Event Forwarding Discriminator |
| EFEC |
Enhanced Forward Error Correction |
| EFP |
Equipment Fault Protection |
| EH |
Environmentally Hardened |
| EIA |
Electronic Industries Alliance; Electronic Industries Association |
| EID |
Equipment Identifier |
| EIDE |
Enhanced Integrated Drive Electronics |
| EIRP |
Effective Isotropic Radiated Power |
| EJB |
Enterprise Java Beans |
| ELAN |
Emulated Local Area Network |
| ELR |
Extra Long Reach |
| EM |
Element Manager |
| EMC |
ElectroMagnetic Compatibility |
| EMD |
Extended Management Domain |
| EMEA |
Europe, Middle East and Africa |
| EMBS |
Egress Maximum Burst Size |
| EMG |
Extended Management Gateway |
| EMI |
Electromagnetic Interference |
| EML |
Element Management Layer; Electro-Absorptive Modulated Laser |
| EMP |
Expiring Maintenance Process |
| EMS |
Element Management System |
| EMT |
Expiring Maintenance Tool |
| eMTA |
Embedded Multimedia Terminal Adapter |
| EMX |
ESCON MUX |
| END |
Extended Management Domain |
| ENE |
End Network Element |
| ENUT |
Enhanced Non-preemptable Unprotected Traffic |
| EO |
Equipment Order |
| EOC |
Embedded Operations Channel |
| EoD |
Everything on Demand |
| EOF |
End of Frame |
| EOL |
End of Life |
| EOM |
End of Message |
| EoS |
Ethernet over SONET/SDH |
| EOW |
Engineered Orderwire; Express Orderwire |
| E-PON |
Ethernet Passive Optical Network |
| EPA |
Environmental Protection Agency |
| EPCR |
Egress Peak Cell Rate |
| EPD |
Early Packet Discard |
| EPG |
Equipment Protection Group |
| EPL |
Ethernet Private Line |
| EPLD |
Erasable Programmable Logic Device |
| EPROM |
Erasable Programmable Read Only Memory |
| EQPT |
Equipment |
| ER |
Extended Reach |
| ERDI |
Enhanced Remote Defect Indicator |
| EREI-P |
Enhanced Path Remote Error Indication |
| Errcde |
Error Code |
| ES |
Errored Second |
| ESA |
EDFA Saturation Algorithm; End System Address |
| ESCBND |
ESCON Bundle |
| ESCON |
Enterprise System Connection; IBM Enterprise systems connection protocol |
| ESCR |
Egress Sustainable Cell Rate |
| ESD |
Electrostatic Discharge |
| ESDS |
Electrostatic Discharge Sensitive |
| ESF |
Extended Super Frame; Extended Superframe Format |
| ES-FE |
Errored Seconds - Far End |
| ESI |
End System Identifier |
| ES-IS |
End System to Intermediate System |
| ES-L |
Errored Seconds - Line |
| ES-LFE |
Errored Second-Line Far End |
| ES-MS |
Errored Seconds at the Mulitplexor Section |
| ESMOP |
Electronic Service Method of Procedure |
| ESN |
Extended Subnetwork |
| ES-P |
Errored Seconds - Path |
| ES-PFE |
Errored Seconds - Path Far End |
| ESR |
Errored Second Ratio |
| ES-RS |
Errored Second Regenerator Section |
| ES-S |
Errored Seconds - Section |
| EST |
Eastern Standard Time |
| ES-V |
Errored Second-Virtual Tributary (VT) Path; Errored Second-VT Path Far End |
| ESx |
Errored Second Count |
| ET |
End Terminal; Entitlement Tracker |
| Etag |
Ending Tag |
| ETH |
10/100 Ethernet |
| ETHBND |
Ethernet Bundle |
| ETLMI |
ESCON Trib Laser Manager Interface |
| ETR |
External Timing Reference |
| ETSI |
European Telecommunications Standards Institute |
| EU |
European Union |
| EVM |
Error Vector Magnitude |
| EVPL |
Ethernet Virtual Private Line |
| EVPLAN |
Ethernet Virtual Private Local Area Network |
| EWO |
Engineering Work Order |
| EXER-R |
Exercise - Ring |
| EXER-S |
Exercise - Span (SONET) |
| EXP |
Experimental |
| EXZ |
Excessive Zone |
| F |
| F |
Fahrenheit |
| FA, F/A |
Fuse Alarm; Fault Alarm |
| FAB |
Field Alert Bulletin |
| FAD |
Functional Access Domain |
| FAF |
Facility Failure |
| F&I |
Furnish and Install |
| FC |
Failure Code; Failure Count; Fiber Channel; Fibre Channel |
| FC100 |
Fibre Channel 1 Gb/s |
| FC200 |
Fibre Channel 2 Gb/s |
| FC400 |
Fibre Channel 4 Gb/s |
| FC10000 |
Fibre Channel 10 Gb/s (same as 10GFC) |
| FCAPS |
Fault, Configuration, Accounting, Performance (or Provisioning), Security management |
| FCC |
Federal Communications Commission |
| FC-FE |
Failure Count - Far End |
| FCIP |
Fiber Channel over Internet Protocol |
| FC-L |
Failure Count - Line |
| FC-LFE |
Failure Count - Line Far End |
| FCM |
Fan Control Module |
| FCP |
Fiber Channel Protocol |
| FC-P |
Failure Count - Path |
| FC-PFE |
Failure Count - Path Far End |
| FCS |
Frame Check Sequence |
| FC Switch |
Fiber Channel Switch |
| FCS32 |
Count of FCS-32 Error |
| FC-V |
Failure Count - VT |
| FC-VFE |
Failure Count - VT Far End |
| FDA |
Food and Drug Administration |
| FDD |
Frequency Division Duplexed |
| FDDI |
Fiber Distributed Data Interface |
| FDF |
Fiber Distributing Frame |
| FDL |
Facilities Data Link |
| FDM |
Frequency Division Multiplexing; Fast Ethernet |
| FDMA |
Frequency Division Multiple Access |
| FDP |
Fiber Distribution Panel |
| FDRP |
Frame Drop |
| FE |
Far End; Fast Ethernet; Forward Error Correction |
| FEAC |
Far End Alarm Channel |
| FEACT |
Far-End Terminal Alarm Condition |
| FEALM |
Far-End Alarm |
| FEB |
Fast Ethernet Bridging |
| FEBE |
Far End Block Error |
| FEC |
Forward Error Correction; Forwarding Equivalence Class |
| FECN |
Forward Explicit Congestion Notification |
| FECS |
Forward Error Correction Seconds |
| FEDS |
FICON Extended Storage over Distance |
| FEP |
Far End Protection |
| FEPLF |
Far End Protection Line Failure |
| FEPM |
Far End Performance Monitor |
| FERF |
Far End Receive Failure |
| FET |
Field-Effect Transistor |
| FF |
Fast Forward |
| FFA |
First Field Application |
| FFP |
Facility Fault Protection |
| FFT |
Fast Fourier Transform |
| FIB |
Forwarding Information Base |
| FIC |
Frame Identification Code |
| FICON |
Fiber Connection |
| FIL |
Fiber in the Loop |
| FIT |
Failure in Time |
| FITB |
Fiber in the Building |
| FITL |
Fiber in the Loop |
| FITR |
Fiber in the Riser |
| FM |
Fan Module; Fault Management; Forwarding Module; Frequency Modulation |
| FMA |
Failure Modes Analysis |
| FMECA |
Failure Mode and Effects and Criticality Analyses |
| FMS |
Fault Management System |
| FO |
Fiber Optics |
| FOADM |
Fixed Optical Add/Drop Multiplexer; Flexible Optical Add/Drop Multiplexer |
| FOD |
Free on Demand |
| FOSC |
Fiber Optic Splice Course |
| FOTS |
Fiber Optic Transmission System |
| FP |
Fabry-Perot (type of laser); Frame Pulse (NEC) |
| FPG |
Facility Protection Group |
| FPGA |
Field Programmable Gate Array |
| FPM |
Fan Power Module |
| FPP |
Fast Pattern Processor |
| FPS |
Frames per Second |
| FR |
Frame Relay |
| FRC |
Force |
| FRD |
Functional Requirements Document; Feature Requirements Definition |
| FREQ |
Frequency |
| FRF |
Frame Relay Forum |
| FRF.12 |
Frame Relay Forum Implementation Agreement 12 |
| FRF.13 |
Frame Relay Forum Implementation Agreement 13 |
| FRF.5 |
Frame Relay Forum Implementation Agreement 5 |
| FRF.8.1 |
Frame Relay Forum Implementation Agreement 8.1 |
| FRG |
Fragment Count |
| FRM |
Forward Resource Management; Frame Count |
| FRMS |
Dropped Frames |
| FRU |
Field Replacement Unit |
| FS |
File System |
| FSA |
Field Service Application |
| FSAN |
Full Services Access Network (consortium) |
| FSB |
Field Service Bulletin |
| FSO |
Free Space Optical |
| FS-P |
Forced Switch - Protection |
| FS-R |
Forced Switch - Ring |
| FS-S |
Forced Switch - Span |
| FS-W |
Forced Switch - Working |
| FT-2000 |
SONET OC-48 lightwave system (AT&T) |
| FTA |
Fault Tree Analysis |
| FTAM |
File Transfer and Access Management |
| FTC |
Fabric and Timing Card |
| FTM |
Fabric Timing Module |
| FTP |
File Transfer Protocol |
| FTTB |
Fiber to the Building; Fiber to the Business |
| FTTC |
Fiber to the Curb |
| FTTD |
Fiber to the Desk |
| FTTH |
Fiber to the Home |
| FTTP |
Fiber to the Premise; Maintenance Channel Transparent Termination Point |
| FTTx |
Fiber to the [endpoint] |
| FUNI |
Frame-based User-Network Interface |
| FW |
Firmware; Firewall |
| FWHM |
Full Width at Half Maximum |
| FWM |
Four-Wave Mixing |
| G |
| GA |
General Availability |
| Gb |
Gigabit |
| GB |
Gigabyte |
| GbE |
Gigabit Ethernet |
| GbE VFTP |
Gigabit Ethernet Virtual Facility Termination Point |
| GbE WAN |
Gigabit Ethernet Wide Area Network |
| GbE WIF |
Gigabit Ethernet Wide Area Network Interface |
| GBIC |
Gigabit Interface Converter |
| Gbps, Gbits |
Gigabits per second |
| Gbytes/s |
Gigabytes per second |
| GC |
Gateway Controller |
| GCAC |
Generic Connection Admission Control |
| GCC0 |
General Communications Channel 0 (similar to SDH/SONET DCC) |
| GCIT |
Graphical Craft Interface Terminal |
| GCM |
General Control Module |
| GCRA |
Generic Cell Rate Algorithm |
| GDMO |
Guidelines for the Definition of Managed Objects |
| GE |
Gigabit Ethernet; Greater than or equal to |
| GEB |
Gigabit Ethernet Bridge |
| GET |
Gigabit Ethernet Tunneling |
| GFA |
Gain Flattened Amplifier |
| GFC |
Generic Flow Control |
| GFF |
Gain Flattening Filter (used in EDFA) |
| GFP |
Generic Framing Procedure |
| GFR |
Guaranteed Frame Rate |
| GHz |
Gigahertz; One billion cycles per second |
| GMPLS |
Generalized Multi-Protocol Label Switching |
| GMT |
Greenwich Mean Time; Grasshoppers Made for Telecommunications (GMT fuses) |
| GN |
Gateway Network Element |
| GNE |
Gateway Network Element |
| GND |
Ground |
| GOS |
Grade of Service |
| GP |
Gateway Platform |
| GPI |
General Purpose Input |
| GPIN |
General Purpose Input |
| GPO |
General Purpose Output |
| G-PON |
Gigabit Passive Optical Network |
| GPS |
Global Positioning System; Global Positioning Satellite |
| GR |
Generic Requirement; Geographic Redundancy |
| GRDM |
Gigabit Rate Data Multiplexer |
| GRTES |
General Requirements for Transmission Equipment Specification |
| GT |
Gain Transfer; Grating Temperature |
| GT |
Gain Transfer; Grating Temperature |
| GTP |
Group Termination Point |
| GUI |
Graphical User Interface |
| GW |
Gateway |
| GWC |
Gateway Controller |
| H |
| HA |
High Availability |
| HCFM |
High-speed Cell Forwarding Module |
| HCSFI |
High-speed Central Switch Fabric Interface |
| HD |
High Definition |
| HD-SDI |
High Definition Serial Digital Interface |
| HDB3 |
High Density Bipolar 3 |
| HDCP |
High-bandwidth Digital Content Protection |
| HDLC |
High-speed/level Data Link Control |
| HDMI |
High Definition Multimedia Interface |
| HDSF |
High-speed Distributed Switch Fabric |
| HDT |
Host Digital Terminal |
| HDTV |
High Definition Television |
| HE |
Headend |
| HEC |
Header Error Control; Headend Controller |
| HEM |
Headend Modem |
| HEPA |
High Efficiency Particulate Arrester |
| HFC |
Hybrid Fiber Coax |
| HFM |
High-speed Forwarding Module |
| HGW |
Home Gateway |
| HHP |
Households Passed |
| HISSA |
High Speed Serial Application Specific Integrated Circuit (ASIC) |
| HMS |
Hybrid Management Sub-layer |
| HNv1 |
Home Networking Version 1 |
| HO |
Higher Order |
| HOVC |
Higher Order Virtual Concatenation |
| HOD |
HBO on Demand |
| HOM |
High-Order Modulation |
| HomePNA |
Home Phoneline Networking Alliance |
| HO-DSP |
High Order-Domain Specific Part |
| HOP |
High Order Path |
| HO-POH |
Higher Order - Path Overhead |
| HO-DXC |
Higher Order Digital Cross Connect |
| HP |
Hairpin; Higher Order Path; Homes Passed |
| HPF |
High Pass Filter |
| HPFM |
High-speed Packet Forwarding Module |
| HPNA |
Home Phoneline Networking Alliance |
| HPOV |
Hewlett Packard Open View |
| HP-UX |
Hewlett Packard's UNIX-based OS that runs on HP's enterprise servers |
| HRD |
Hardware Release Document; Hardware Requirements Document |
| HS |
High Speed |
| HSB |
High Speed Bus |
| HSD |
High Speed Data |
| HI |
Hardware/Software Interface; Hardware-Software Integration; High Speed Internet |
| HSSI |
High Speed Serial Interface |
| HT |
High Threshold |
| HTML |
Hyper Text Markup Language |
| HTTP |
Hypertext Transfer Protocol |
| HVAC |
Heating, Ventilation, and Air-Conditioning |
| HW |
Hardware |
| Hz |
Hertz |
| I |
| I/O |
Input/Output |
| IAD |
Integrated Access Device; Interface Access Device |
| IAS |
Internet Access Service; Internet Authentication Service |
| IBCC |
In-Band Communication Channel |
| IC |
Integrated Circuit |
| ICB |
Independent Customer Builds |
| ICD |
International Code Designator |
| ICLR |
Ingress Cell Loss Ratio |
| ICMP |
Internet Control Message Protocol |
| ICNV |
Input- Command Not Valid |
| ICP |
IMA Control Protocol |
| ICPT |
Installed Circuit Pack Type |
| ICR |
Initial Cell Rate |
| ID |
Identifier; Identification |
| IDE |
Integrated Device Electronics |
| IDF |
Intermediate Distribution Frame; Invalid Data Flag |
| IDH |
Identification High byte |
| IDI |
Initial Domain Identifier |
| IDL |
Interface Definition Language |
| IDNV |
Input- Data Not Valid |
| IDP |
Initial Domain Part |
| IDS |
Intrusion Detection System |
| IDT |
Inter-DXC Trunk |
| IE |
Information Element |
| IEC |
Incoming Error Count; InterExchange Carrier |
| IEEE |
Institute of Electrical and Electronics Engineers |
| IETF |
Internet Engineering Task Force |
| IF |
Intermediate Frequency |
| IFC |
Initial First Cost |
| IG |
Information Group |
| IGMP |
Internet Group Multicast Protocol |
| IIAC |
Input - Invalid Access Identifier |
| IIOP |
CORBA Internet Inter-ORB Protocol |
| IISP |
Interim Interface Signaling Protocol |
| ILA |
Intermediate Light Amplification; Integrated Line Amplifier; In-Line Amplifier |
| ILEC |
Incumbent Local Exchange Carrier |
| ILM |
Integrated Laser Module; Integrated Laser Modulator |
| ILMI |
Interim Link Management Interface; Interim Local Management Interface |
| ILOG |
Information Log; Incoming Log |
| ILR |
Issues List Report |
| IM |
Instant Messaging |
| IMA |
Inverse Multiplexing over ATM |
| IMBS |
Ingress Maximum Burst Size |
| IMD |
Intermodulation Distortion |
| IME |
Interface Management Entity |
| IMT |
Inter Machine Trunk |
| IN |
Intelligent Network |
| I-NET |
Institutional Network |
| INM |
Integrated Network Manager |
| INMS |
Integrated Network Management Suite; Integrated Network Management System |
| INT |
Internal; Internal Clock |
| INTAP |
Interoperability Technology Association for information Processing |
| INTP |
Internodal Tunneling Protocol |
| INVW |
Invalid Word Count |
| IntServ |
Integrated Services |
| I/O |
Input/Output |
| IOA |
Input/Output Adapter |
| IOF |
Inter-office Fiber |
| IOR |
Interoperable Object Reference |
| IP |
Internet Protocol |
| IPC |
Inter-process Communications; InterProcess or InterProcesser Control |
| IPCR |
Ingress Peak Cell Rate |
| IPG |
Inter-Packet Gap |
| IPM |
Interested Party Multicast |
| IPMS |
Interested Party Multicast Service |
| IPPV |
Impulse Pay per View |
| IPOA |
Internet Protocol over ATM |
| IPsec |
Internet Protocol Security |
| IPTA |
Internet Protocol Transport Agreement |
| IPTV |
IP Television |
| IR |
Intermediate Reach |
| IRD |
Integrated Receiver/Decoder |
| IRT |
Integrated Receiver/Transcoder |
| IS |
In Service; Intermediate System |
| ISA |
Industry Standard Architecture |
| IS-ANR |
In Service - Abnormal |
| IS-ANRST |
In Service - Abnormal and Restricted |
| ISCC |
InterSwitch Communications Channel |
| ISCR |
Ingress Sustainable Cell Rate |
| iSCSI |
Internet Small Computer System Interface; SCSI Protocol over TCP/IP |
| ISD |
Idle Signal Detection |
| ISDN |
Integrated Services Digital Network |
| IS-IS |
Intermediate System to Intermediate System |
| ISM |
Industrial Scientific Medical |
| IS-NR |
In Service - Normal |
| ISO |
International Standards Organization |
| ISP |
Internet Service Provider; Inside Plant |
| IS-RST |
In Service - Restricted |
| ISTP |
Internet Signaling Transport Protocol |
| ISV |
Independent Software Vendor |
| IT |
Information Technology |
| ITA |
Installation, Test, and Acceptance |
| ITC |
Independent Transmit Clock |
| ITL |
International Telecommunications Union |
| ITE |
Information Technology Equipment |
| ITS |
Intelligent Transportation System; Institute for Telecommunications Sciences |
| ITT |
International Telephone and Telegraph |
| ITU |
International Telecommunication Union |
| ITU-T |
International Telecommunications Union - Telecommunications Standards Section |
| IUC |
Interval Usage Code |
| IWF |
Interworking Function |
| IXC |
Inter-exchange Carrier |
| J |
| J0 |
J Zero; Section trace byte in performance monitoring (J-zero) |
| J2EE |
Java 2 Enterprise Edition |
| JBR |
Jabber Count |
| JDBC |
Java Database Connectivity |
| JDK |
Java Development Kit |
| JDMK |
Java Dynamic Management Kit |
| JEM |
JAVA™ Element Manager |
| JMS |
JAVA™ Messaging System |
| JNDI |
Java Naming and Directory Interface |
| JRE |
Java Runtime Environment |
| JTAG |
Joint Test Action Group |
| JVM |
Java Virtual Machine |
| K |
| K1 |
SONET or SDH overhead byte of VLSR or MSP/MS-SPRing (see K2) |
| K2 |
Used with K1-SONET or SDH overhead byte for VLSR or MSP/MS-SPRing |
| Kb |
Kilobit |
| KB |
Kilobyte |
| Kb/s |
Kilobits per second |
| KB/s |
Kilobytes per second |
| Kbit/s |
Kilobits per second |
| Kbps |
Kilobits per second |
| KBps |
Kilobytes per second |
| kHz |
KiloHertz |
| Km |
Kilometer |
| Ksh |
Korn Shell |
| ksym/s |
Kilosymbols per Second |
| ksym/sec |
Kilosymbols per Second |
| kVA |
1000 Volt Amperes |
| kW |
Kilowatt |
| L |
| L |
Current |
| L2TP |
Layer 2 Tunneling Protocol |
| L3 |
Layer 3 |
| LA |
Line Adapter |
| LAC |
Local Access Concentrator |
| LADM |
Linear Add/Drop Multiplexer |
| LAN |
Local Area Network |
| LANE |
Local Area Network Emulation |
| LAP |
Link Access Procedure; Link Access Protocol |
| LAPB |
Link Access Procedure Balanced |
| LAPD |
Link Access Procedure-D Channel (X 25) |
| LAPF |
Link Access Procedure for Frame-Mode Bearer Services |
| LAPS |
Link Access Procedure |
| LASER |
Light Amplification by Stimulated Emission of Radiation |
| LATA |
Local Access and Transport Area |
| LBC |
Laser Bias Current |
| LBCL |
Laser Bias Current Level |
| LBCN |
Normalized Laser Bias Current |
| LBO |
Line Build Out |
| LC |
Lucent Connector; Line Card |
| LCAP |
Local Craft Access Panel |
| LCAS |
Link Capacity Adjustment Scheme |
| LCC |
Life-Cycle cost; Link Control Channel |
| LCD |
Liquid Crystal Display |
| LCL |
Lower Confidence Limit |
| LCN |
Local Computer Network; Logical Channel Number; Local Communications Network |
| LCR |
Least Cost Routing |
| LCT |
Large Capacity Terminal |
| LD |
Laser Diode |
| LDAP |
Lightweight Directory Access Protocol |
| LDCC |
Line Data Communications Channel |
| LDP |
Label Distribution Protocol |
| LDS |
Local Digital Switch |
| LEAF |
Large Effective Area Fiber |
| LEC |
Local Exchange Carrier |
| LECS |
LAN Emulation Configuration Server |
| LED |
Light Emitting Diode |
| LER |
Label Edge Router |
| LES |
LAN Emulation Server |
| LF |
Line Fail |
| LFE |
Line Far End |
| LGN |
Logical Group Node |
| LGX |
Light-Guide Crossconnects |
| LH |
Logical Host |
| LIC |
Line Interface Card |
| LIF |
Line Interface |
| LIM |
Line Interface Module |
| LIP |
Local Information Packet |
| LIU |
Line Interface Unit |
| LLC |
Logical Link Control |
| LLSDCC |
Lower-Layer Section DCC |
| LM |
Line Module |
| LMI |
Local Management Interface |
| LMP |
Link Management Protocol |
| LO |
Low Order |
| LOADM |
Lightweight Optical Add/Drop Multiplexer |
| LOC |
Loss of Clock |
| Locn |
Location |
| LOF |
Loss of Frame |
| LOF-P |
Path Loss of Frame |
| LOH |
Line Overhead |
| LOM |
Loss of Multiframe; List of Materials |
| LOP |
Loss of Pointer |
| LOPDP |
Loss of Pointer Decay Period |
| LOPI |
Loss of Pointer Inhibit |
| LOPIP |
Loss of Pointer Integration Period |
| LOP-P |
Loss of Pointer - Path |
| LOP-V |
VT Loss of Pointer |
| LOS |
Loss of Signal |
| LOSS |
Loss of Signal Seconds |
| LOVC |
Low-Order VC |
| LOW |
Local Orderwire |
| LO-DXC |
Low Order Digital Cross Connect |
| LP |
Line Processor; Lockout of Protection; Low Order Path |
| LP-S/SF-P |
Lockout of Protection - Span/Signal Fail - Protection |
| Lport |
Logical port |
| LP-S |
Lockout of Protection - Span |
| LR |
Long Reach (fiber); Line Regeneration Equipment |
| LRDC |
Long Reach Daughter Card |
| LSA |
Low Speed ADM |
| LSA-E-EH |
Low Speed ADM Electrical (10/100 Base-T) Environmentally Hardened |
| LSA-O-EH |
Low Speed ADM Optical (100 Base-FX) Environmentally Hardened |
| LSB |
Least Significant Bit |
| LSF |
Loss of Signal or Frame indication signal |
| LSL |
Lower Specification Limit |
| LSM |
Loss of Sync Message |
| LSN |
Logical Subnetwork |
| LSP |
Label Switched Path; Local Service Provider |
| LSR |
Label Switch Router |
| LSSGR |
LATA Switching System Generic Requirements |
| LT |
Low Threshold; Laser Temperature |
| LTE |
Line Terminating Equipment |
| LTN |
Local Transport Network (fiber ring) |
| LTP |
Link Termination Point; Logical Termination Point |
| LTS |
Loop Testing System; Long Term Storage |
| LU |
Line Unit |
| LVD |
Low-Voltage Distribution |
| LWP |
Low Water Peak |
| LZS |
Lempel Ziv Stac |
| M |
| M12 |
MUX DS-1 into DS2 |
| M13 |
MUX DS-1 into DS3 |
| M23 |
MUX DS-2 into DS3 |
| MAC |
Media Access Control; Medium Access Control |
| MAN |
Metropolitan Area Network |
| MAP |
Main Audio Program |
| MAU |
Media Access Unit |
| Mb |
Megabit |
| MB |
Megabyte |
| Mbaud |
Megabaud |
| Mb/s |
Megabits per second |
| Mbits/s |
Megabits per second |
| Mbps |
Megabits per second |
| MBps |
Megabytes per second |
| MB/s |
Megabytes per second |
| MBS |
Maximum Burst Size |
| MCP |
Management Control Processor |
| MCT |
Maintenance Channel Transparency |
| MCTF |
Motion Compensated Temporal Filtering |
| MD |
MetroDirector K2 Platform |
| mDVR |
Multi-TV Digital Video Recorder |
| MCR |
Minimum Cell Rate; Minimum Cost Routing |
| MDF |
Main Distribution Frame |
| MDU |
Multiple Dwelling Unit |
| MEA |
Mismatch of Equipment and Attributes |
| MEGACO |
Media Gateway Control Protocol |
| MER |
Modulation Error Ratio |
| MFR |
Multilink Frame Relay |
| MG |
Media Gateway |
| MGC |
Media Gateway Controller |
| MGCP |
Media Gateway Control Protocol |
| MGN |
Management Gateway Node |
| MHz |
Megahertz |
| MIB |
Management Information Base |
| MID |
Message Identifier |
| MIPS |
Millions of Instructions per Second |
| MIT |
Management Information Tree |
| MJ |
Major |
| ML |
Mediation Layer |
| MLMD |
Multiplexer/Demultiplexer |
| MLPPP |
Multi-Link Point-to-Point Protocol |
| mm |
millimeter |
| MM |
Multimode; Multimedia |
| MME |
Multiwave Management Element |
| MMF |
Multi-Mode Fiber |
| MML |
Man Machine Language |
| MMO |
Main Material Order |
| MMP |
Multiwave Management Element |
| MN |
Minor |
| MO |
Managed Object |
| MOD |
Module; Movies on Demand |
| MODEM |
Modulator-Demodulator |
| MOF |
Managed Object Framework |
| MOP |
Method of Procedure |
| MOR |
Multi-wavelength Optical Repeater |
| MOS |
Mean Opinion Score |
| MP3 |
MPEG-2 Layer 3 |
| MP |
Management Portal |
| MPCKTS |
Multicast Packet Count |
| MPEG |
Moving Pictures Expert Group |
| MPI |
Multi-Path Interface; Multi-Path Interference |
| MPLmS |
Multi-Protocol Lambda Switching |
| MPLS |
Multi Protocol Label Switching |
| MPLS-CP |
MPLS Control Plane |
| MPN |
Mode Partition Noise |
| MPS |
Modeling and Planning Suite |
| MPOA |
Multi Protocol over Asynchronous Transfer Mode |
| MPS |
Modeling and Planning System; Modeling and Planning Suite |
| MPT |
Multiplex Pass-Through |
| MPTS |
Multiple Program Transport Stream |
| M-Plane |
Management Plane |
| MR |
Modification Request; Material Request; Medium Reach |
| MRRB |
Maintenance Requirements Review Board; Material Release Review Board |
| ms |
Milliseconds |
| MS |
Multiplex Section |
| MS-AIS |
Multiplex Section - Alarm Indication Signal |
| MSA |
Mediation Services Administrator |
| MSB |
Most Significant Bit |
| MSC |
Metro Shelf Controller; Microsoft Cluster Server |
| MSF |
Multiservice Switching Forum |
| MSM |
Metro Switching Manager; Metro Switching Mismatch |
| MSN |
Multi-Subnetwork |
| MSNM |
Metro Switching Network Manager |
| MSNM ML |
Metro Switching Network Manager Mediation Layer |
| MSO |
Multiple System Operator |
| MSOH |
Multiplexer Section Overhead |
| MSP |
Multiplex Section Protection; Multiservice Switching Path |
| MSPP |
Multiservice Provisioning Platform |
| MS-P |
Manual Switch - Protection |
| MSPVC |
Management Soft Permanent Virtual Circuit |
| MS-R |
Manual Switch - Ring |
| MS-RDI |
Multiplex Section - Remote Defect Indication |
| MS-REI |
Multiplex Section Remote Error Indication |
| MS-S |
Manual Switch - Span |
| MS-Spring/MSPR |
Multiplex Section Shared Protection Ring |
| MST |
Mountain Standard Time; Multiplex Section Termination |
| MSTE |
Multiplex Section Terminating Equipment |
| MS-W |
Manual Switch - Working |
| MTA |
Multimedia Terminal Adapter |
| MTBF |
Mean Time between Failure |
| MTIE |
Maximum Time Interval Error |
| MTM |
Metro Transport Manager |
| MTTP |
Transparent Connection Termination Point |
| MTTR |
Mean Time to Repair |
| MTTU |
Mean Time to Understand |
| MTU |
Maximum Transmission Unit |
| MUX |
Multiplexer |
| MUXCVR |
Muxceiver |
| mV |
Millivolt |
| MVOA |
Miniature Variable Optical Attenuator |
| MW |
MultiWave® |
| MZ |
Mach-Zehnder |
| N |
| NA |
No Alarm; Not Alarmed; Not Applicable; Not Available; Numerical Aperture |
| NAD |
Network Access Domain |
| NAP |
Network Access Point |
| NAPT |
Network Address and Protocol Translation |
| NAS |
Network Access Server; Network Attached Storage |
| NAT |
Network Address Translation |
| NBI |
Northbound Interface |
| NBK |
No Backup |
| NC |
Nodal Controller; Normally Closed (contacts) |
| NCC |
Network Control Center |
| NCCI |
Network Call Correlation Identification |
| NCP |
Nodal Control Point; Nodal Control Processor |
| NCP&D |
Network Capacity Planning and Delivery |
| NCR |
Non-Conformance Report |
| NCS |
Network Computing System; Network Control System; Network Call Signaling |
| NCTA |
National Cable & Telecommunications Association |
| NDC |
National Destination Code |
| NDF |
New Data Flag |
| NDIS |
Network Design and Inventory System |
| NDMH |
Non-Degraded Modem Hours |
| NDP |
Network Discovery Protocol; Neighbor Discovery Protocol |
| NDSF |
Non-Dispersion Shifted Fiber |
| NDVR |
Network Digital Video Recording |
| NE |
Network Element |
| NEBS |
Network Equipment Building Standards; Network Equipment Building Systems |
| NEC |
National Electric Code |
| NEF |
Network Element Function |
| NE/FE |
Near End/Far End |
| NEG |
Negative Terminal |
| NEID |
Network Element Identification |
| NEIR |
Network Element Information Request |
| NEMA |
National Electrical Manufacturers Association |
| NFS |
Networked File System |
| NGDLC |
Next Generation Digital Loop Carrier |
| NG-L1 |
Next Generation Layer 1 |
| NGNA |
Next Generation Network Architecture |
| NI |
Network Interface |
| NIC |
Network Interface Card |
| NID |
Network Interface Device |
| NIDU |
Network Interface Data Unit |
| NIS |
Network Infrastructure Solutions |
| NIU |
Network Interface Unit |
| NLA |
Network Layer Address; Network Layer Agent |
| NLC |
Node Line Card |
| NLD |
Neighbor Link Discovery |
| NLPI |
Network Layer Protocol Identifier |
| nm |
nanometer |
| NM |
Network Management; Network Manager; Network Management; Node Manager |
| NMA |
Network Monitoring and Analysis |
| NME |
Network Management Ethernet |
| NMF |
Node-level Management Function |
| NML |
Network Management Layer |
| NMS |
Network Management System |
| NN |
N key on keyboard for a no response |
| NNI |
Network to Network Interface; Network Node Interface |
| NNIF |
Network to Network Interface |
| NNM |
Network Node Manager |
| NNTP |
Network News Transfer Protocol |
| NO |
Network Object; Normally Open (contacts) |
| NOC |
Network Operations Center |
| NOCC |
Network Operations Control Center |
| NPC |
Network Parameter Control |
| NPR |
Noise Power Ratio |
| NR |
No Reply |
| NRT |
Non-Real Time |
| NRTL |
Nationally Recognized Test Laboratory |
| NRTVBR |
Non Real-Time Variable Bit Rate |
| NRZ |
Non-Return to Zero |
| ns |
Nanosecond |
| NSA |
Non Service Affecting |
| NSAP |
Network Service Access Point |
| NSI |
Network Side Interface |
| NSN |
Nationally Significant Number |
| NSP |
Node Switch Provider; Node Switch Processor |
| NT |
Window New Technology |
| NTF |
No Trouble Found |
| NTFCNCDE |
Notification Codes (TL1) |
| NTFS |
New Technology File System |
| NTP |
Network Time Protocol |
| NTS |
Near Term Storage; Network Time Synchronization |
| NTSC |
National Television Standards Committee |
| NUT |
Non-preemptive Unprotected Traffic |
| NVM |
Non-Volatile Memory |
| NVRAM |
Nonvolatile Random Access Memory |
| NZDSF |
Non-Zero Dispersion Shifted Fiber |
| O |
| OA |
Optical Amplifier |
| OADM |
Optical Add/Drop Multiplexer |
| OAM |
Operations, Administration and Maintenance |
| OAMCell |
Operations, Administration and Maintenance Cell |
| OAMP |
Operation, Administration, Maintenance and Provisioning |
| O-BLSR |
Optical-Bidirectional Line Switched Ring |
| OC |
Optical Carrier |
| OCAP |
OpenCable Application Platform |
| OCH |
Optical Channel |
| OCI |
Open Connection Indication |
| OCT |
Octet Count |
| OC-1 |
Optical Carrier level 1, SONET bit rate = 51.84 Mb/s |
| OC-3 |
Optical Carrier level 3, SONET bit rate = 155.52 Mb/s |
| OC-12 |
Optical Carrier level 12, SONET bit rate = 622.08 Mb/s |
| OC-48 |
Optical Carrier level 48, SONET bit rate = 2.488 Gb/s |
| OC-192 |
Optical Carrier level 192, SONET bit rate = 9.953 Gb/s |
| OC-n |
Optical Carrier-number; Optical Carrier where N denotes a multiple of 51.84 Mb/s |
| OCTU |
Optical Channel Transport Unit |
| OCXO |
Oven-Controlled Crystal Oscillator |
| ODA |
Outlet Digital Adapter |
| ODACS |
Optical Data Acquisition and Control System |
| ODBMS |
Object Database Management System |
| ODF |
Optical Distribution Frame |
| ODPR |
Optically Dedicated Protection Ring |
| ODUk |
Optical channel Data Unit where k is 1 or 2 |
| OEO |
Optical-to-Electronic-to-Optical |
| OEPL |
Optical Ethernet Private Line |
| OEPLAN |
Optical Ethernet Private Local Area Network |
| OEVPL |
Optical Ethernet Virtual Private Line |
| OEVPLAN |
Optical Ethernet Virtual Private Local Area Network |
| OFC |
Open Fiber Control; Optical Fiber Communication |
| OFDM |
Orthogonal Frequency Division Multiplexing |
| OFS |
Out of Frame Second |
| OID |
Object Identifier |
| OIU |
Operator Interface Unit; Optical Interface Unit; Office Interface Unit |
| OLA |
Optical Line Amplifier; Optical Link Analysis |
| OLB |
Optical Link Budget |
| OLM |
Optical Link Module |
| OLMP |
Optical Link Management Protocol |
| OLS |
Optical Line System |
| OLT |
Optical Line Termination; Optical Line Terminal |
| OLTP |
OSRP Link Termination Point |
| OM |
Optical Module |
| OMC |
Operation and Maintenance Center |
| OMG |
Object Management Group |
| OMS |
ON-Center Management Suite |
| ON |
Optical Network |
| ONE |
Optical Network Element |
| ONM |
ON-Center Network Manager |
| ONT |
Optical Network Terminal |
| ONU |
Optical Network Unit |
| OO |
Optical-to-Optical |
| OOB |
Out of Band |
| OOF |
Out of Frame |
| OOK |
On-Off Keying |
| OOM1 |
Out of Multi Frame Stage 1 |
| OOM2 |
Out of Multi Frame Stage 2 |
| OOO |
Optical - Optical - Optical |
| OOR |
Out of Range |
| OOS |
Out of Service |
| OSS-AU |
Out of Service-Autonomous |
| OSS-AUMA |
Out of Service-Autonomous and Management |
| OSS-AURST |
Out of Service-Autonomous and Restricted |
| OOS-MA |
Out of Service-Management |
| OOS-MAANR |
Out of Service-Management and Abnormal |
| OpEx |
Operations Expenditure |
| OPM |
Optical Performance Monitoring; Optical Power Meter |
| OPR |
Optical Power Received |
| OPS/INE |
Operations Provisioning System/Intelligent Network Element |
| OPT |
Optical Power Transmit |
| OPTORL |
Optical Return Loss |
| OPTX AE |
OPTX Automation Engine |
| OPTX NM |
OPTX Network Manager |
| OpUk |
Optical channel payload Unit where k is 1 or 2 |
| OPVC |
Optical channel Payload Virtual Container (timeslot) |
| ORB |
Object Request Broker |
| ORIG |
Original; Originating |
| ORL |
Optical Return Loss |
| ORP |
Optical Routing Protocol |
| OS |
Operating System |
| OSA |
Optical Spectrum Analyzer |
| OSC |
Optical Supervisory Channel; Optical Service Channel |
| OSDS |
Operations Systems Data Server |
| OSGI |
Open Services Gateway Initiative |
| OSHA |
Occupational Safety and Health Act |
| OSI |
Open Systems Interconnection |
| OSM |
OSC Splitter Module |
| OSMINE |
Operations Systems Modifications for the Integration of Network Elements |
| OSNR |
Optical Signal-to-Noise Ratio; Open Signal-to-Noise Ratio |
| OSP |
Optical Signaling Protocol; Outside Plant |
| OSPF |
Open Shortest Path First |
| OSPR |
Optically Shared Protection Ring |
| OSRP |
Optical Signaling and Routing Protocols |
| OSS |
Operations Support System |
| OSSAN |
Operations Support System Access Nodes |
| OSWF |
On-site Work Force |
| OTC |
Operations Technical Center; Optical Transport Card |
| OTDR |
Optical Time Domain Reflectometer |
| OTGR |
Operations Technology Generic Requirements |
| OTN |
Optical Transport Network |
| OTS |
Optical Transport System |
| OTS RPTR |
OTS Repeater |
| OTU |
Optical Transport Unit |
| OUI |
Organizationally Unique Identifier |
| OUNI |
Optical User Network Interface |
| O-UPSR |
Optical-Unidirectional Path Switched Ring |
| OUSM |
Optical Utility Services Manager |
| OUSP |
Optical Utility Services Platform |
| OW |
Order Wire |
| OXC |
Optical Cross Connect |
| P |
| P2P |
Peer to Peer |
| PA |
Port Adapter; Pre-Amplifier |
| PAD |
Power Attenuation Device |
| PAN |
Personal Area Networking |
| PARP |
Proxy ARP |
| PAT |
Program Association Table |
| PAX |
Path Adaptation and X-Connect |
| PB |
Petabyte |
| PBX |
Private Branch Exchange |
| PBOR |
Primary-Backup Object Replication |
| PC |
Personal Computer; Physical Contact; Processor Card |
| PCA |
Protection Channel Access |
| PCB |
Printed Circuit Board |
| PCC |
Processor Communication Channel |
| PCI |
Peripheral Component Interconnect |
| PCN |
Program Change Notice; Product Change Notice |
| PCM |
Pulse Code Modulation |
| PCMCIA |
Personal Computer Memory Card Interface Adaptor |
| PCMM |
PacketCable Multimedia |
| PCO |
Pre-Conditioned Order |
| P-Code |
Product Code |
| PCR |
Peak Cell Rate |
| PDA |
Personal Digital Assistant |
| PDAP |
Power Distribution and Alarm Panel |
| PDC |
Passive Dispersion Compensator |
| PDF |
Portable Document Format |
| PDH |
Pleisiochronous Digital Hierarchy |
| PDI |
Payload Defect Indication |
| PDL |
Polarization Dependent Loss |
| PDP |
Policy Decision Point |
| PDU |
Power Distribution Unit; Protocol Data Unit |
| PEG |
Public, Education, Government |
| PEM |
Processor Enhancement Module; Processor Element Module |
| PEP |
Policy Enforcement Point |
| PESQ |
Perceptual Evaluation of Speech Quality |
| PFE |
Path Far End |
| PFM |
Packet Forwarding Module |
| PFO |
Premium Feature Open |
| PG |
Peer Group; Protection Group |
| PGID |
Peer Group Identifier |
| PGL |
Peer Group Leader |
| PHY |
Physical Layer Device; Physical |
| PIC |
Programmable Interrupt Controller |
| pid |
Password Identifier |
| PID |
Personally Identifiable Data; Protocol Identifier; Packet Identifier; Personal Identification |
| PIF |
Packet Interface FPGA |
| PIN |
Photo Intrinsic; Positive-Intrinsic Negative; Personal Identification Number |
| PING |
Packet Internet Groper |
| PIP |
Plug-In Provisioning |
| PJ |
Pointer Justification |
| PL |
Packet Loss |
| PLC |
Packet Loss Concealment |
| PLCN |
Pilot Line Change Notification |
| PLCP |
Physical Layer Convergence Protocol |
| PLD |
Programmable Logic Device |
| PLL |
Phase Locked Loop |
| PLM |
Payload Label Mismatch |
| PLM-P |
Payload Label Mismatch - Path |
| PLM-V |
Payload Label Mismatch - VT |
| PLN |
PNNI Logical Node |
| PLO |
Path Layer Overhead |
| PM |
Performance Management; Performance Monitoring; Program Manager; Project Manager |
| PMA |
Power Management Algorithm |
| PMBB |
Performance Monitoring Building Block |
| PMD |
Polarization Mode Dispersion |
| PMDC |
PMD Compensator |
| PMM |
Power Management Module |
| PMP |
Point-to-MultiPoint |
| PN |
Physical Node |
| PNC |
Physical Node Controller |
| PNNI |
Private Network-to-Network Interface; Private Network Node Interface |
| PO |
Purchase Order |
| POH |
Path Overhead |
| PON |
Passive Optical Network |
| POP |
Point of Presence |
| POR |
Power on Reset |
| POS |
Packet over SONET; Positive Terminal |
| POST |
Power on Self Test |
| POTS |
Plain Old Telephone Service |
| PPC |
Power PC |
| PPD |
Partial Packet Discard |
| PPJC |
Positive Pointer Justification Count |
| PPL |
Point-to-Point Link |
| ppm |
Pulse Position Modulation; Pulses per Million |
| PPM |
Parts per Minute; Parts per Million; Pulses per Million |
| Pport |
Physical port |
| PPP |
Point-to-Point Protocol |
| PPS |
Path Protection Switched; Pulses per Second |
| PPT |
Power Passing Tap |
| PRBS |
Pseudo Random Bit Sequence |
| PRC |
Primary Reference Clock |
| PRI |
Primary Rate Interface |
| PROM |
Programmable Read Only Memory |
| PROT |
Protocol; Protection |
| PRNG |
Pseudo Random Number Generators |
| PRS |
Primary Reference Source |
| PS |
Power Supply; Policy Server |
| ps/nm-km |
Pico-second |
| PSA |
PacketCable Service Agreement |
| PSBF |
Protection Switching Byte Failure |
| PSC |
Protection Switching Count |
| PSD |
Protection Switching Duration |
| PSEL |
Presentation Suite |
| PSI |
Program Specific Information |
| PSL |
Path Signal Label |
| PSM |
Persistent Stored Module |
| PSN |
Packet Switch Node; Packet Switched Network |
| P-SNC |
Permanent SNC |
| PSQM |
Perceptual Speech Quality Measurement |
| PSR |
Protection Side Regeneration; Path Switched Ring |
| PST |
Primary State; Pacific Standard Time |
| PSTN |
Public Switched Telephone Network |
| PSU |
Power Supply Unit; Packet Switch Unit |
| PT |
Pass-Through; Payload Type |
| PTE |
Path Terminating Equipment |
| PTI |
Payload Type Indicator |
| PTP |
Physical Termination Point; Point-To-Point; Path Termination Point |
| PTSE |
PNNI Topology State Element |
| PTSP |
PNNI Topology State Packet |
| PV |
Protocol Violation |
| PVC |
Permanent Virtual Circuit; Poly Vinyl Chloride; Private Virtual Circuit |
| PVR |
Personal Video Recorder |
| PWB |
Printed Wire Board |
| PWM |
Pulse Width Modulation |
| PWR |
Power |
| Q |
| Q3 |
Telecommunications Management Network (TMN) Interface |
| QAM |
Quadrature Amplitude Modulation |
| QL |
Quality Level |
| QMC |
QUICC Multichannel Controller |
| QoS |
Quality of Service |
| QPSK |
Quadrature Phase Shift Keying |
| QUICC |
Quad Integrated Communications Controller |
| R |
| R&D |
Research and Development |
| R/W |
Read/Write |
| RADIUS |
Remote Authentication Dial-In User Service |
| RAI |
Remote Alarm Indication |
| RAID |
Redundant Array of Inexpensive Disk; Redundant Array of Independent Disk |
| RAIG |
Resource Availability Information Group |
| RAM |
Random Access Memory |
| RAN |
Regional Area Network |
| RBF |
Reconfigurable Blocking Filter |
| RBOC |
Regional Bell Operating Company |
| RBM |
Regional Business Manager |
| RBW |
Resolution Bandwidth |
| RCC |
Routing Control Channel |
| RCV |
Receiver |
| RCVR |
Receiver |
| RDF |
Rate Decrease Factor |
| RDI |
Remote Defect Indication |
| RDI-L |
Remote Defect Indication - Line |
| RDI-P |
Remote Defect Indication - Path |
| RED |
Random Early Detection; Random Early Discard |
| REF |
Reference |
| REI |
Remote Error Indication |
| REI-L |
Remote Error Indication - Line |
| REI-P |
Remote Error Indication - Path |
| Rev. |
Revision |
| RF |
Radio Frequency |
| RFC |
Request for Comment |
| RFI |
Radio Frequency Interference; Remote Failure Indication; Request for Information |
| RFI-L |
Remote Failure Indication (detected at the line-layer) |
| RFI-P |
Remote Failure Indication (detected at the path-layer) |
| RG |
Residential Gateway |
| R.H. |
Relative Humidity |
| RHC |
Regional Holding Company |
| RIB |
Routing Information Base |
| RIN |
Relative Intensity Noise |
| RIP |
Routing Information Protocol |
| RJ |
Registered Jack |
| RKS |
Record Keeping Server |
| RMA |
Return Material Authorization; Replace Material Authorization |
| RMAN |
Recovery Manager |
| RMI |
Remote Method Invocation |
| RMS |
Root Mean Square |
| RNR |
Not Ready to Receive; Remote Failure Indication |
| ROADM |
Re-configurable Optical Add/Drop Multiplexer |
| ROC |
Regional Operations Center |
| ROI |
Return on Investment |
| ROM |
Read Only Memory |
| RPM |
Revolutions per Minute |
| RPR |
Resilient Packet Ring |
| RR |
Ready to Receive; Reverse Request |
| RRB |
Reliability Review Board |
| RRO |
Record Route Object |
| RR-R |
Reverse Request - Ring |
| RR-S |
Reverse Request - Span |
| RS |
Regenerator Section; Reed-Solomon |
| RS-E |
Ring Switch - East |
| RSOH |
Regenerator Section Overhead |
| RSP |
Route Switch Processor |
| RST |
Regenerator Section Terminating |
| RSVP |
Resource Reservation Protocol |
| RSVP-TE |
Resource Reservation Protocol with Traffic Engineering |
| RS-W |
Ring Switch - West |
| RT |
Remote Terminal; Real Time |
| RTC |
Real-Time Clock |
| RTI |
Real-Time Ingest |
| RTN |
Return (voltage return) |
| RTOS |
Real-Time Operating System |
| RTP |
Routing Table Protocol; Real-Time Transport Protocol; Routine Task Procedure |
| RTRV |
Retrieve |
| RTS |
Ready to Send; Request to Send; Real Time Operation System |
| RTSP |
Real Time Streaming Protocol |
| RTT |
Round-trip Time |
| RTU |
Right to Use |
| RTVBR |
Real-Time Variable Bit Rate Traffic |
| RU |
Rack Unit |
| RW |
Rewind |
| RWA |
Routing and Wavelength Assignment |
| R/W |
Read/Write |
| RX |
Receive |
| Rx Line |
Receive Line |
| RZ |
Return to Zero |
| RZ-DPSK |
Return to Zero Differential Phase Shift Keying |
| S |
| s |
Second |
| s.f. |
Square Foot |
| S/IMP |
Signal to Impulse Ratio |
| S/N |
Signal to Noise Ratio |
| SA |
Service-Affecting |
| SAAL |
Signaling ATM Adaptation Layer |
| SABLIME |
Product Administration System (AT&T) |
| SADM04-e |
SONET/SDH Add/Drop Multiplexer (ONLINE Edge Platform) |
| SAN |
Storage Area Network |
| SAP |
Secondary Audio Program |
| SAR |
Segmentation and Reassembly |
| SARP |
Switching Address Resolution Protocol |
| SAS |
Severely Errored Frame and AIS Seconds |
| SASE |
Standalone Synchronization |
| SATA |
Serial AT Attachment |
| SATT |
Synchronization, Alarms, and Telemetry Termination |
| SAW |
Surface Acoustic Wave |
| SBLK |
Errored Superblocks |
| SBS |
Stimulated Brillouin Scattering |
| SBV |
Switched Broadcast Video |
| SBW |
Signal Bandwidth |
| SC |
Service Channel; Square Connector; Shelf Controller |
| SCC |
Serial Communications Controller; Serial Communications Channels |
| SCCI |
Small Computer System Interface |
| S-CDMA |
Synchronous Code Division Multiple Access |
| SCM |
Service Channel Modem; Sub-carrier Multiplexing |
| SCN |
Service Channel Network; Shared Content Network |
| SCR |
Sustainable Cell Rate; Silicon Controlled Rectifier |
| SCSI |
Small Computer System Interface |
| SCTE |
Society of Cable Telecommunications Engineers |
| SD |
Signal Degrade; Signal Detect; Standard Definition |
| SDCC |
Section Data Communications Channel |
| SDH |
industries_cable Synchronous Digital Hierarchy |
| SDI |
Secure Digital Interface; Serial Digital Interface |
| SDL |
Synchronous Data Link; Synchronous Delay Line |
| SDLC |
Synchronous Data Link Control |
| SDMH |
Severely Degraded Modem Hours |
| SDP |
Session Description Protocol |
| SD-P |
Signal Degrade - Path |
| SD-R |
Signal Degrade - Ring |
| SDRAM |
Synchronized Dynamic Random Access Memory |
| SD-S |
Signal Degrade-Span |
| SDTV |
Standard Definition Television |
| SDU |
Service Data Unit |
| SE |
Systems Engineer |
| SEAL |
Simple and Efficient Adaptation Layer |
| SEC |
Secondary |
| SEF |
Severely Errored Framing |
| SEFS |
Severely Errored Frame Seconds |
| SEFS-S |
Severely Errored Framing Seconds - Section |
| SEM |
Service Entitlement Manager |
| SEMS |
Severely Errored Multi-frame Seconds |
| SerDes |
Serializer/DeSerializer |
| SES |
Severely Errored Seconds |
| SES-L |
Severely Errored Seconds - Line |
| SES-LFE |
Severely Errored Seconds - Line Far End |
| SES-P |
Severely Errored Seconds - Path |
| SES-PFE |
Severely Errored Seconds - Path Far End |
| SESR |
Severely Errored Second Ratio |
| SES-RS |
Severely Errored Seconds - Regenerator Section |
| SES-S |
Severely Errored Seconds - Section |
| SES-V |
Severely Errored Seconds - VT |
| SES-VFE |
Severely Errored Seconds - VT Far End |
| SETS |
Synchronous Equipment Timing Source |
| SF |
Signal Failure; Super Frame |
| SFD |
Start of Frame Delimiter |
| SFDADM02-e |
SONET/SDH Framed Data Add/Drop Multiplexer (ONLINE Edge Platform) |
| SFF |
Small Form Factor (connector) |
| SFO |
Sync Frequency Offset |
| SFP |
Small Form-factor Pluggable |
| SF-R |
Signal Failure - Ring |
| SF-S |
Signal Failure - Span |
| SG |
Signaling Gateway |
| SGC |
Signaling Gateway Controller |
| sh |
Bourne Shell |
| SHx |
Shelf Number |
| SI |
Serial Interface; Service Independent |
| SIC |
System Integrity Control; Standard Industrial Classification |
| SID |
System Identification number; Source Identifier |
| SIF |
SONET Interoperability Forum; Switch Interface FPGA |
| SIM |
Service Interface Module |
| SIP |
Session Initiation Protocol |
| SLA |
Service Level Agreement |
| SLIP |
Serial Line Internet Protocol |
| SLM |
Service Layer Manager |
| SLOSS |
Synchronization Loss |
| SLR |
Service Level Report |
| SM |
Single Mode; Switching Module; Shelf Manager |
| SMB |
Small and Medium Business |
| SMC |
Serial Management Controllers; Standard Management Committee |
| SMDS |
Switched Multimegabit Data Service |
| SME |
Small and Medium Enterprise |
| SMF |
Single Mode Fiber |
| SMIR |
Single Mode Intermediate Reach |
| SML |
Service Management Layer |
| SMLR |
Single Mode Long Reach |
| SMM |
Service Mediation Module |
| SMON |
Switch Monitor |
| SMOP |
Service Method of Procedure |
| SMS |
Service Management Suite |
| SMT |
Surface Mount Technology; Self-Monitoring Task |
| S-MTA |
Standalone Multimedia Terminal Adaptor |
| SNA |
Systems Network Architecture |
| SNC |
Subnetwork Connection; Subnetwork Controller |
| SNCP |
Subnetwork Connection Protection |
| SNCP/I |
Subnetwork Connection Protection/Inherent monitoring |
| SNCP/N |
Subnetwork Connection Protection/Non-intrusive monitoring |
| SNM |
Switching Network Manager |
| SNMP |
Simple Network Management Protocol |
| SNP |
Sequence Number Protection |
| SNR |
Signal-to-Noise Ratio |
| SNTP |
Simple Network Time Protocol |
| SOA |
Semiconductor Optical Amplifier |
| SOADM |
Select Optical Add/Drop Multiplexer |
| SOF |
Start of Frame |
| SOH |
Section Overhead; State of Health |
| SOHO |
Small Office/Home Office |
| SONET |
industries_cable Synchronous Optical Network |
| SOP |
Standard Operating Procedure |
| SP |
Shelf Processor; Shelf Pump |
| SPC |
SONET Permanent Circuit |
| SPE |
Synchronous Payload Envelope |
| SPF |
Shortest Path First |
| SPI |
Serial Peripheral Interface; Service Provider Interface |
| SPM |
Self-Phase Modulation |
| SPR/SPRing |
Shared Protection Ring |
| SPTP |
Service Path Termination Point |
| SPVC |
Soft Permanent Virtual Connection; Soft Permanent Virtual Circuit |
| SQL |
Structured Query Language |
| SR |
Short Reach (fiber) |
| SRAM |
Static Random Access Memory |
| SRD |
Software Release Document |
| SRN |
Software Release Notice |
| SRS |
Stimulated Raman Scattering |
| SRTS |
Synchronous Residual Time Stamp |
| SRVEFF |
Service Affecting (TL1) |
| SSB |
Single Sideband |
| SSCOP |
Service Specific Connection Oriented Protocol |
| SSCS |
Service-Specific Convergence Sublayer |
| SSEL |
Session Selector |
| SSF |
Server Signal Failure |
| SSL |
Secure Sockets Layer |
| SSM |
Synchronization-Status Messages |
| SSMF |
Standard Single Mode Fiber |
| SST |
Secondary Service State |
| SSTUR |
Site-Specific Turn-Up Report |
| SSU |
Synchronization Supply Unit |
| ST |
Straight Terminus; Straight Tip |
| ST1 |
Stratum 1 |
| ST2 |
Stratum 2 |
| ST3 |
Stratum 3 |
| ST3E |
Stratum 3 Enhanced |
| ST4 |
Stratum 4 (Asynchronous) |
| STB |
Set-Top Box |
| STC |
Stacking and Timing Card |
| STE |
Section Terminating Equipment; Section Terminating Element |
| STII (2) |
Type of optical connector |
| STM |
Synchronous Transfer Mode |
| STM-0 |
Synchronous Transfer Mode level 0, SDH bit rate = 51.84 Mb/s |
| STM-1 |
Synchronous Transfer Mode level 1, SDH bit rate = 155.52 Mb/s |
| STM-4 |
Synchronous Transfer Mode level 4, SDH bit rate = 622.08 Mb/s |
| STM-16 |
Synchronous Transfer Mode level 16, SDH bit rate = 2488.32 Mb/s |
| STM-64 |
Synchronous Transfer Mode level 64, SDH bit rate = 9953.28 Mb/s |
| STM-n |
Synchronous Transport Module "n" |
| STM-nC |
Synchronous Transport Module of level n concatenated |
| STMX |
SONET/SDH Thin Multiplexer |
| STP |
Spanning Tree Protocol; Shielded Twisted Pair |
| STS |
Synchronous Transport Signal |
| STS-1 |
Synchronous Transport Signal Level 1 |
| STS-3 |
Synchronous Transport Signal Level 3 |
| STS-3c |
Synchronous Transport Signal Level 3, concatenated |
| STS-n |
Synchronous Transport Signal "n" |
| STS-Nc |
Contiguous Concatenation of N STS-1 SPEs |
| STS-N-Xv |
Virtual Concatenation of X STS-N SPEs |
| STU |
Secure Telephone Unit; Synchronized, Traceability Unknown; Stratum Traceability Unknown |
| STU-P |
Stratum Traceability Unknown-Provisioned |
| SVC |
Switched Virtual Circuit |
| SVCC |
Switched Virtual Channel Connection |
| SVOD |
Subscription Video on Demand |
| SVP |
Secure Video Processor |
| SVPC |
Switched Virtual Path Connection |
| SW |
Software |
| SWCA |
Split Working Channel Access |
| SWID |
Software Identifier |
| SWOD |
Software ODACS |
| SX |
Short Reach as in 1000Base-SX |
| SYNC |
Synchronization |
| SYNCIO |
Synchronized Input/Output |
| SYSLOG |
System Log |
| T |
| T1 |
Service or line operation at the DS-1 rate |
| T3 |
Digital Carrier System for DS3 Signals |
| TAC |
Transport Aggregated Circuit; Technical Assistance Center |
| TADR |
Target Address |
| TADRMAP |
Target Address Map |
| TAP |
Test Access Port; Technician Access Port |
| TARP |
Target Identifier Address Resolution Protocol |
| TB |
Terabyte |
| TBOS |
Telemetry Byte Oriented Serial Protocol |
| TBU |
Transport Bandwidth Unit |
| TBUS |
Timing Bus |
| TC |
Transmission Convergence; Transport Complex; Transport Channel |
| TCA |
Threshold Crossing Alert; Timing Control and Access |
| TCBE |
Total Corrected Bit Error |
| TCM |
Trellis Coded Modulation; Transport Channel Members |
| TCMO |
Transport Complex Managed Object |
| TCP |
Transmission Control Protocol; Trouble Cleaning Procedure |
| TCP/IP |
Transmission Control Protocol/Internet Protocol |
| TCTP |
Transparent Connection Termination Point |
| TD |
Traffic Director |
| TDEV |
Time Deviation |
| TDM |
Time Division Multiplexing |
| TE |
Terminal Equipment |
| TEAL |
CoreDirector® Events, Alarms, and Logging |
| TEC |
Thermo-Electric Cooler |
| TED |
Traffic Engineering Database |
| TEI |
Terminal Endpoint Identifier; Terminal Equipment Identifier |
| Telco |
Telephone Company |
| TELR |
Talker Echo Loudness Rating |
| TEO |
Telephone Equipment Order |
| TERM |
Termination |
| TFT |
Thin Film Transistor |
| TFTP |
Trivial File Transfer Protocol |
| TG |
Timing Generator |
| TGCP |
Trunking Gateway Control Protocol |
| TGS |
Time Generation System |
| THEC |
Corrected Type Header Error Correction Code |
| THz |
TeraHertz (1012 hertz) |
| TIA |
Telecommunications Industry Association |
| TID |
Target Identification; Terminal Identification |
| TIE |
Time Interval Error |
| TIM |
Trace Identifier Mismatch; Transmit Intermediate Multiplexer |
| TIM-S |
Trace Identifier Mismatch - Section |
| TIRKS |
Trunk Integrated Record Keeping System |
| TISSA |
Time Space Switch Application-Specific Integrated Circuit |
| TKIP |
Temporal Key Integrity Protocol |
| TL-1 CLI |
Transaction Language One, Command Line Interface |
| TL-1 |
Transaction Language 1 |
| TLI |
Transaction Language Command Line Interface |
| TLC |
Transport Logical Connection |
| TLS |
Transparent LAN Services |
| TLSR |
Transoceanic Line Switched Ring |
| TLV |
Type-Length-Value |
| TM |
Timing Module; Transaction Manager |
| TML |
Telephony Markup Language |
| TMN |
Telecommunications Management Network |
| TMO |
Trans Metro Optical (platform) |
| tmout |
Time Out |
| tmper |
Time Period |
| TMUX |
Terminal Multiplexer |
| TNL |
Ethernet Tunneling |
| TNM |
Transport Network Management |
| TOD |
Television on Demand |
| ToD |
Time of Day |
| TOH |
Transport Overhead |
| TOP |
Task Oriented Practice; Task Oriented Procedure |
| TOS |
Type of Service |
| TP |
Termination Point |
| TPFI |
Timing Plane Fault Isolation |
| TR |
Technical Reference |
| TRIB |
Tributary |
| tRTO |
TCP Retransmit Timeout |
| TrTOH |
Transparent Transport Overhead |
| TS |
Time Slot; Time Stamp; Time Synchronization |
| TSA |
Time Slot Assignment |
| TSD |
Transport System Division |
| TSE |
Topology State Element |
| TSEL |
Transport Selector |
| TSF |
Transport Signal Failure |
| TSG |
Timing Signal Generator |
| TSI |
Time Slot Interchange; Time Switch Interchange |
| TSR |
Technical Service Representative |
| TSX |
Time-Space Switch ASIC |
| TTE |
Transparent Terminal Equipment |
| TTL |
Transistor Transistor Logic; Time to Live |
| TTP |
Trail Termination Point |
| TTTP |
Transparent Trail Termination Point |
| TU |
Tributary Unit; Transmission Unit |
| TUG |
Tributary Unit Group |
| TUG-n |
Tributary Unit Group, level n |
| TU-n |
Tributary Unit, level n |
| TV |
Television |
| TW |
TrueWave |
| TWC |
TrueWave Classic |
| Tx Line |
Transmit Line |
| TX |
Transmit |
| U |
| UART |
Universal Asynchronous Receiver/Transmitter |
| UAS |
Unavailable Seconds |
| UAS-L |
Unavailable Seconds - Line |
| UAS-LFE |
Unavailable Seconds - Line Far End |
| UAS-P |
Unavailable Seconds - Path |
| UAS-PFE |
Unavailable Seconds - Path Far End |
| UAS-RS |
Unavailable Seconds - Regenerator Section |
| UAS-S |
Unavailable Seconds - Section |
| UAS-V |
Unavailable Seconds - VT |
| UAS-VFE |
Unavailable Seconds - VT Far End |
| UASL |
Unavailable Second Count-Line |
| UASP |
Unavailable Second Count-Path |
| UAT |
Unavailable Time |
| UB |
Uncorrected Block |
| UBRVBR |
Unspecified Bit Rate Variable Bit Rate |
| UBR |
Undefined Bit Rate; Unspecified Bit Rate |
| UC |
User Channel |
| UCA |
Unswitched Channel Access |
| UCBE |
Uncorrectable Block Error |
| UCD |
Upstream Channel Descriptor |
| UD |
Unconditional Disconnect |
| UDLR |
Unidirectional Link Routing |
| UDP |
User Datagram Protocol |
| UDR |
Unconditional Disconnect Response |
| UEQ |
Unequipped |
| UFEC |
Ultra Forward Error Correction |
| UGC |
Universal Gateway Carrier |
| UGS |
Unsolicited Grant Service |
| UHD |
Ultra High Density |
| UHF |
Ultra High Frequency |
| UI |
User Interface |
| UID |
User Identifier |
| UITS |
Unacknowledged Information Transfer Service |
| UL |
Underwriters Laboratories |
| ULH |
Ultra Long Haul |
| ULSDCC |
Upper Layer Section Data Communications Channel |
| UNEs |
Unbundled Network Elements |
| UNEQ |
Unequipped Path; Unequipped |
| UNEQ-P |
Unequipped Path |
| UNEQ-V |
Unequipped VT |
| UNI/UNIF |
User Network Interface |
| UNII |
Unlicensed National Information Infrastructure |
| UOG |
Universal OSS Gateway |
| UPC |
Ultra Physical Contact; Universal Packet Carrier; Usage Parameter Control |
| UPnP |
Universal Plug and Play |
| UPS |
Uninterrupted Power Supply |
| UPSR |
Unidirectional Path Switched Ring |
| URI |
Universal Resource Identifier |
| URL |
Universal Resource Locator |
| US |
Upstream |
| USA |
Universal Shelf Amplifier |
| USB |
Universal Serial Bus |
| USEPA |
United States Environmental Protection Agency |
| UTC |
Universal Time Coordinated; Universal Transport Carrier |
| UTOPIA |
Universal Test and Operations Physical Interface for ATM |
| UTP |
Unprotected Termination Point; Unshielded Twisted Pair |
| UV |
Ultraviolet |
| UVC |
Universal Voice Carrier; Universal Video Carrier |
| V |
| V |
Voltage |
| V/A |
Video/Audio |
| VAC |
Volts Alternating Current |
| VAD |
Voice Activity Detection |
| VAP |
Virtual Access Partitioning |
| VBI |
Vertical Blanking Interval |
| VBR |
Variable Bit Rate |
| VC |
Virtual Circuit; Virtual Channel; Virtual Container; Virtual Concatenation |
| VC-N |
Virtual Container Level N (N=11, 12, 2, 3, 4) |
| VC-N-Xc |
Contiguous Concatenation of X Virtual Containers at Level N |
| VC-N-Xv |
Virtual Concatenation of X Virtual containers at Level N |
| VCAT |
Virtual Concatenation |
| VCC |
Virtual Channel Connection |
| VCG |
Virtual Concatenation Group |
| VCI |
Virtual Channel Identifier |
| VCL |
Virtual Channel Link |
| VCM |
Virtual Concatenation-group Member |
| VCO |
Voltage Controlled Oscillator |
| VCR |
Video Cassette Recorder |
| VCSEL |
Vertical Cavity Surface-Emitting Laser |
| VCXO |
Voltage Controlled Crystal Oscillator |
| VDC |
Volts Direct Current |
| VDSL |
Very-high-bit-rate Digital Subscriber Line |
| VF |
Virtual Fiber; Virtual Facility |
| VFTP |
Virtual Facility Termination Point |
| VG |
Virtual Group |
| VGA |
Variable Gain Amplifier |
| VHF |
Very High Frequency |
| VLAN |
Virtual Local Area Network |
| VLR |
Very Long Reach |
| VLSR |
Virtual Line Switched Ring |
| VM |
Voice Mail; Virtual Memory |
| VOA |
Variable Optical Attenuator |
| VOD |
Video on Demand |
| VoIP |
Voice over Internet Protocol |
| VOM |
Volt-Ohm Meter |
| VOQ |
Virtual Output Queuing |
| VOW |
Voice Order Wire |
| VP |
Virtual Path |
| VPC |
Virtual Path Connection |
| VPCI |
Virtual Path Connection Identifier |
| VPG |
Virtual Path Group |
| VPI |
Virtual Path Identifier |
| VPI/VCI |
Combined, VPI and VCI identify a connection on an ATM Network |
| VPL |
Virtual Path Link |
| VPLS |
Virtual Private LAN Service |
| VPN |
Virtual Private Network |
| VPSP |
Virtual Path Switch Protection |
| VRRP |
Virtual Router Redundancy Protocol |
| VSA |
Virtual-Scheduling Algorithm; Vector Signal Analyzer |
| VSAT |
Very Small Aperture Terminal |
| VSI |
Vendor-Specific Information |
| VSR |
Very Short Reach |
| VT |
Virtual Tributary |
| VTG |
Virtual Tributary Group |
| VT-100 |
Terminal Emulation System |
| V-UNI |
Virtual User Network Interface |
| W |
| W |
Watt; Working |
| WAD |
Wavelength Add and Drop |
| WAN |
Wide Area Network |
| WB |
Working Band; Westbound |
| WCA |
Working Channel Access |
| WCI |
Wavelength Converter Interface |
| WCI RT |
Wavelength Converter Interface Rate Tunable |
| WCIRT-e |
Wavelength Converter Interface Rate Tunable (ONLINE Edge Platform) |
| WCSS |
WDM Capable Switching System |
| WDM |
Wavelength Division Multiplexing |
| WDT |
Watchdog timer |
| W-DCS |
Wideband Digital Cross-Connect System |
| WECA |
Wireless Ethernet Compatibility Alliance |
| WEP |
Wired Equivalency Privacy |
| WFA |
Workforce Automation |
| WFM |
Workforce Management |
| WFQ |
Weighted Fair Queuing |
| WIF |
Wide Area Network Interface |
| WiFi |
Wireless Fidelity |
| WiMedia |
An alliance for Wireless Multimedia |
| WLAN |
Wireless Local Area Network |
| WM9 |
Windows Media Player Version 9 |
| WPA |
Wireless (WiFi) Protected Access |
| WPS |
Working/Protect Splitter |
| WSS |
Wavelength Selective Switch |
| WRED |
Weighted Random Early Discard; Weighted Random Early Detection |
| WTR |
Wait to Restore |
| WWN |
World Wide Name |
| X |
| X.25 |
Packet Switched Communications Interface |
| XC |
Cross Connect |
| XCVR |
Transceiver |
| XDSL |
See DSL (Digital Subscriber Line) |
| XFP |
10 Gb/s small form-factor pluggable transceiver |
| XML |
Extensible Markup Language |
| XMTR |
Transmitter |
| XPM |
Cross-Phase Modulation |
| Z |
| ZAC |
Zero Administration Client |
| ZWP |
Zero Water Peak |
