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| Acronym | Meaning |
|---|---|
| JISC | Joint Information Systems Committee |
| Internet | Networks to other organisations |
| Intranet | Communications to services within an organisation |
| PAN | Personal Area Network |
| LAN | Local Area Network |
| WAN | Wide Area Network |
| MAN | Metropolitan Area Network |
| AAL | ATM Adaptation Layer |
| AAP | Alternate Access Provider |
| AAR | Automatic Alternate Routing |
| ABATS | Automatic Bit Access Test System |
| ABM | Asynchronous Balanced Mode |
| ABR | Available Bandwidth Rate |
| ABR | Available Bit Rate |
| AC | Access Control |
| ACD | Automatic Call Distribution |
| ACF | Access Coordination Function |
| ACF | Advanced Communications Function |
| ACF | Access Control Field |
| ACK | Acknowledgement |
| ACM | Address Complete Message |
| ACO | Automatic Cut Off |
| ACSE | Association Control Service Element |
| ADC | Analog to Digital Converter |
| ADCCP | Adv Data Comm Control Procedure |
| ADM | Add/Drop Multiplexer |
| ADM | Asynchronous Disconnected Mode |
| ADM | Add/Drop Multiplexer |
| ADM 3X | DS3 Add-Drop Multiplex |
| ADPCM | Adaptive Differential Pulse Code Modulation |
| ADPCM | Adaptive Differential Pulse Code Mod. |
| ADSL | Asymmetric Digital Subscriber Line |
| ADSS | All Dielectric Self-Supporting |
| ADTS | Automated Digital Terminal Systems |
| AFPS | Automatic Facility Protection Switching |
| AFSK | Audio Frequency Shift Keying |
| AIN | Advanced Intelligent Network |
| AIS | Alarm Indication Signal |
| AIS-L | Alarm Indication Signal - Line |
| AIS-P | Alarm Indication Signal - Path |
| AIS-V | Alarm Indication Signal - Virtual (Tributary) |
| AIU | Analog Interface Unit |
| AL | Access Link |
| ALI | Automatic Location Indication |
| ALIT | Automatic Line Insulation Test |
| ALPS | Automatic Loop Protection Switching |
| ALS | Active Line State |
| AMA | Automatic Message Accounting |
| AMI | Alternate Mark Inversion |
| AMPS | Advanced Mobile Phone Service |
| AN | Access Node |
| ANC | Access network Controller |
| ANI | Automatic Number Identification |
| ANM | ANswer Message |
| ANR | Auto Network Routing |
| ANS1 | Abstract Syntax Notation 1 |
| ANSI | American National Standards Institute |
| AOC | ADSL overhead control channel |
| AON | All Optical Network |
| AP | Access Point |
| AP | Action Point |
| APDU | Application Protocol Data Unit |
| API | Application Programming Interface |
| APPC | Advanced Program to Program Comm |
| APR | Alarm Processing Remote |
| APS | Automatic Protection Switching |
| ARD | Automatic Ring Down |
| ARP | Address Resolution Protocol |
| ARQ | Automatic Retransmission Request |
| AS56 | Accunet Switched 56 |
| ASB | Application Specific Bits |
| ASCII | American Std Code for Info Interchange |
| ASDS | Accunet Sprectrum of Digital Device Svc |
| ASE | Applications Service Element |
| ASN.1 | Abstract Syntax Notation One |
| ASP | Application Service Provider |
| AT | Access Tandems |
| ATD | Asynchronous Time Division |
| ATM | Asynchronous Transfer Mode |
| ATM-LI | ATM Link Identifier |
| ATMM | ATM Layer Management |
| ATM-PCI | ATM Protocol Control Information |
| ATM-SDU | ATM Service Data Unit |
| ATU-C | ADSL Transceiver Unit - Central office end |
| ATU-R | ADSL Transceiver Unit - Remote terminal end |
| AU | Administrative Unit |
| AUG | AU Group |
| AUI | Attachment Unit Interface |
| AVS | AVailable Seconds |
| B | Bearer Channel |
| B3ZS | Bipolar 3 Zero Substitution/Suppression |
| B6ZS | Bipolar 6 Zero Substitution |
| B8ZS | Bipolar 8 Zero Substitution |
| B8ZS | Bipolar 8 Zero Suppression |
| BA | Buffer Allocation |
| BAF | Bellcore AMA Format |
| BAsize | Buffer Allocation |
| Bc | Committed Burst Size |
| BC | Bearer Capability |
| BCC | Block Check Code |
| BCD | Binary Coded Decimal |
| BCI | Bit Count Integrity |
| BCM | Bit Compression Multiplexer |
| BCN | BeaCoN |
| B-CPE | Broadband Customer Premises Equipment |
| BCS | Binary Synchronous Communication |
| BDCS | Broadband Digital Cross-connect Sys |
| BECN | Backward Explicit Congestion Notification |
| BER | Bit Error Rate |
| BERT | Bit Error Rate Tester |
| BES | Bursty Errored Second |
| BEtag | Beginning/End Tag |
| BGP | Border Gateway Protocol |
| BIB | Backward Indicator Bit |
| BICI | Broadband InterCarrier Interface |
| B-ICI | Broadband Isdn InterCarrier Interface |
| BIP | Bit Interleaved Parity |
| BIP-N | Bit Interleaved Parity - N |
| BISDN | Broadband Integrated Services Digital Network |
| BISYNC | Binary Synchronous Communications |
| BIU | Basic Information Unit |
| BLER | Block Error Rate |
| BMS | Bandwidth Management System |
| BNS | Broadband Network Switch |
| BOC | Bell Operating Company |
| BOM | Beginning of Message |
| BOP | Bit Oriented Protocol |
| BORSCHT | Battery feed, Overvoltage protection, Ringing, Signalling, Hybrid, & Testing |
| BPOP | Building Point of Presence |
| BPS | Bits Per Second |
| BPV | Bipolar Violation |
| BRA | Basic Access Rate |
| BRI | Basic Rate Interface (ISDN) |
| BRITE | Basic Rate Interface Transmission Extension |
| BRT | Broadband Remote Terminal |
| BRZ | Bipolar Return to Zero |
| BSC | Base Station Controller |
| BSC | Binary Synchronous Communications |
| BSN | Backward Sequence Number |
| BSP | Bell System Practice |
| BSRF | Basic System Reference Frequency |
| BSS | Base Station Subsystem |
| BSS | Basic Service Set |
| BSS | Broadband Switching System |
| BTAG | Beginning of TAG |
| BTS | Base Station Transceiver |
| BWB | Bandwidth Balancing |
| C/R | Command/Response |
| C/R | Control/Response - indication bit |
| C/R Bit | Command Response Bit |
| CAC | Connectionless Admission Control |
| CAL | Customer Access Line |
| CAN | Campus-Area Network |
| CAP | Carrierless Amplitude Phase (modulated) |
| CAP | Competitive Access Provider |
| CAS | Channel Associated Signaling |
| CASE | Common Application Service Elements |
| CATV | Cable Television |
| CBCU | Centralized Broadband Control Unit |
| CBO | Continuous Bit Stream Oriented |
| CBQ | Class-Based Queuing |
| CBR | Constant Bit Rate |
| Cc | Committed Burst Size |
| CC | Call Control |
| CCC | Clear Channel Capability |
| CCH | Connections per Circuit-hr in Hundreds |
| CCIS | Common Channel Interoffice Signaling |
| CCITT | Comite Consultatif Internationale Telegraphique et Telephonique |
| CCM | Customer Control & Mgmt |
| CCR | Customer Controlled Reconfiguration |
| CCR | Commitment, Concurrency, & Recovery |
| CCS | Common Channel Signaling |
| CCS | Hundred Call Seconds |
| CCS | Common Channel Signaling |
| CCSA | Common Control Switching Arrangement |
| CCU | Common Control Unit |
| CD | Count Down |
| CDMA | Code Division Multiple Access |
| CDO | Community Dial Office |
| CDPD | Cellular Digital Packet Data |
| CDV | Cell Delay Variation |
| CE | Connection Element |
| CEP | Connection End Point |
| CEPT | Conference of European Postal Telecom |
| CES | Circuit Emulation Service |
| CEV | Controlled Environment Vault |
| CF | Coin First |
| CFA | Carrier Failure Alarm |
| CGA | Carrier Group Alarm |
| CH | Cell Header |
| CHTML | Compact Hyper Text Markup Language |
| CI | Customer Installation |
| CI | Continuation Identifier |
| CIB | CRC Indication Bit |
| CID | Craft Interface Device |
| CIR | Committed Information Rate |
| CIR | Cell Insertion Ratio |
| CIU | Communications Interface Unit |
| CL | Common Language |
| CLEC | Competitive Local Exchange Carrier |
| CLIR | Calling Line Identity Restriction |
| CLIST | Command List |
| CLLM | Consolidated Link Layer Mgmt |
| CLN | ConnectionLess Network |
| CLNP | ConnectionLess Network Protocol |
| CLNS | ConnectionLess Network Service |
| CLP | Cell Loss Priority (CLP Bit) |
| CLS | Connectionless Service |
| CLTS | ConnectionLess Transport Service |
| CMD | Circuit Mode Data |
| CMDR | Command Reject |
| CMI | Code Mark Inversion |
| CMIP | Common Management Info Protocol |
| CMIS | Common Mgmt Info Service |
| CMISE | Common Management Information Service Element |
| CMOT | CMIP over TCP/IP |
| CMT | Connection Management |
| CND | Calling Number Delivery |
| CNF | Confirmed |
| CNM | Customer/Communications Network Management |
| CO | Central Office/Connection Oriented Svc |
| COC | Central Office Connection |
| COCF | Connection Oriented Converge Function |
| CODEC | COder-DECoder |
| COFA | Change of Frame Alignment |
| CO-LAN | Central Office Local Area Network |
| COM | Continuation of Msg |
| COMPANDER | COMpressor/exPANDER |
| CON | Concentrator |
| CON | Connection Oriented Network |
| CONP | Connection Network Protocol |
| CONS | Connection-Oriented Network Services |
| COPS | Common Open Policy Service |
| CORBA | Common Object Request Broker Architecture |
| COS | Class of Service |
| COT | Central Office Terminal |
| CP | Cell Payload |
| CP | Customer Premises |
| CP | Central Processor |
| CPCS | Common Part Convergence Sublayer |
| CPE | Customer Premise Equipment |
| CPI | Computer-PBX Interface |
| CPI | Common Parti Indicator |
| C-PLANE | Control Plane |
| CPMI | Customer Proprietary Network Info |
| CPN | Customer Premises Node |
| CPNI | Customer Proprietary Network Information |
| CPP | Calling Party Pays |
| CPS | Customer Premises System |
| CPU | Central Processor Unit |
| CR | Call Reference |
| CRC | Cyclic Redundancy Check |
| CRF | Connection Related Function |
| CRIS | Customer Records Info System |
| CRS | Cell relay Service |
| CRV | Call Reference Value |
| CRV | Coding Rule Violation |
| CS | Convergence Sublayer |
| CSA | Canadian Standards Association |
| CSA | Carrier Service Area |
| CSAP | Core Service Access Point |
| CSC | Common Signaling Channel |
| CSDU | Core Service Data Unit |
| CSH | Convergence Sublayer Header |
| CSI | Convergence Sublayer Indicator |
| CSMA/CD | Carrier Sense Multiple Access/Collision Detect |
| CSPDN | Circuit Switched Public Data Network |
| CS-PDU | Convergence Layer PDU |
| CST | Convergence Sublayer Trailer |
| CSU | Channel Service Unit |
| CT | Channel Termination |
| CT | Computer Telephony |
| CTS | Clear to Send |
| CTS | Customer Test Service |
| CU | Channel Unit |
| CUG | Closed User Group |
| CV | Coding Violation |
| CVSD | Continuously Variable Slope Delta Modulation |
| CWC | Center Weighted Control |
| CXR | Carrier |
| D | Delta or Data |
| D/I | Drop and Insert |
| D3 | Third generation channel bank (24 channels on T1) |
| D4 | Fourth generation channel bank (48 channels on 2T1's or T1C) |
| DA | Destination Address |
| DACS | Digital Access & Cross-Connect System |
| DAS | Dual Attached Station |
| DASD | Direct Access Storage Device |
| DASS | Digital Access Signaling System |
| DAVIC | Digital Audio Video Council |
| dB | deciBell |
| dBm | dB relative to one milliwatt |
| DBN | Dial-Back Number |
| dBrn | dB relative to noise |
| dBrnc | dB relative to noise (C-Notch or C-Message) |
| DBS | Direct Broadcast Satellite |
| DCA | Distributed Comm Channel |
| DCB | Digital Channel Bank |
| DCC | Data Comm Channel |
| DCC | Digital Cross Connect |
| DCC | Direct Connect Card |
| DCCX | Direct Circuit Control Exchange |
| DCE | Data Circuit-terminating Equipment |
| DCE | Data Communications Equipment |
| DCF | Distributed Coordination Function |
| DCN | Data Communications Network |
| DCS | Digital Cross-connect System |
| DDCMP | Digital Data Comm Msg Protocol |
| DDD | Direct Distance Dialing |
| DDS | Dataphone Digital Service (registered trademark of AT&T C0.) |
| DDS | Digital Data Service |
| DDS/SC | Digital Data Svc w/ Secondary Channel |
| DDSD | Delay Dial Start Dial |
| DE | Discard Eligibility |
| DF | Distributing Frame |
| DFC | Data Flow Control |
| DFL | Distributed Feedback Laser |
| DFRI | Datacom Reference Frame Input |
| DHCP | Dynamic Host Configuration Protocol |
| DID | Directed Inward Dialing |
| DL | Data Link |
| DLC | Data Link Connection |
| DLC | Digital Loop Carrier |
| DLCI | Data Link Connection Identifier |
| DM | Disconnected Mode |
| DMI | Digital Multiplex Interface |
| DMPB | Digital Multipoint Bridging |
| DMPU | Derived MAC Protocol Data Unit |
| DMS | Digital Multiplex System |
| DMT | Discrete Multitone |
| DN | Directory Number |
| DNIC | Data Network Identification Code |
| DNIC | Data Network Interface (2B+D ISDN) |
| DNIC | Data Network Interface Circuit |
| DNIS | Dialed Number Identification Service |
| DNS | Domain Name System |
| DOCSIS | Data Over Cable Service Interface Specification |
| DoV | Data Over Voice |
| DP | Dial Pulse |
| DPA | Distributed Power Architecture |
| DPBX | Digital Private Brance Exchange |
| DPC | Destination Signal Transfer Point Code |
| DPCM | Differential Pulse Code Modulation |
| DPDU | Data (link) Protocol Data Unit |
| DPL | Digital Power Line |
| DPNSS | Digital Private Network Signaling System |
| DPO | Dial Pulse Originate |
| DPT | Dial Pulse Terminate |
| DPT | Dynamic Packet Transport |
| DQDB | Distributed Queue Dual Bus |
| DS-0 | Digital Signal level Zero (64Kbps data/voice channel) |
| DS-1 | Digital Signal Level One (1.544 Mbps |
| DS-2 | Digital Signal Level Two (6.312 Mbps |
| DS-3 | Digital Signal Level Three (44.736 Mbps |
| DSAP | Destination Service Access Point |
| DSG | Default Slot Generator |
| DSI | Digital Speech Interpolation |
| DSL | Digital Subscriber Line |
| DSLAM | Digital Subscriber Line Access Multiplexer |
| DSP | Digital Signal Processor |
| DSP | Display System Protocol |
| DSS1 | D-channel Signaling System 1 |
| DSSS | Direct Sequence Spread Spectrum |
| DSU | Digital Service Unit |
| DSU | Data Service Unit |
| DSX | Digital Signal Cross-connect |
| DT | Data Transfer |
| DTAU | Digital Test Access Unit |
| DTE | Data Terminal Equipment |
| DTF | Dial Tone First |
| DTF | Digital Transmission Facility |
| DTI | Digital Trunk Interface |
| DTMF | Dual Tone Multiple Frequency |
| DTR | Data Terminal Ready |
| DTS | Digital Terminal Systems |
| DTU | Data Terminal Unit |
| DTX-1 | Digital Sig Cross-connect - Level 1 (DS1) |
| DUP | Data User Part |
| DVI | Digital Video Interactive |
| DVI | Digital Video Interleaved |
| DWDM | Dense Wavelength Division Multiplexing |
| DX | Duplex |
| DXC | Digital Cross Connect |
| DXI | Data Exchange Interface |
| E-1 | European T-1" (DS-1) at 2.048 Mbps" |
| EA | Extended Address (bit) |
| EAI | Enterprise Application Integration |
| EBCDIC | Extended Binary Coded Decimal Information Code |
| EC | Echo Canceling |
| EC | Error Correction |
| ECC | Error Checking Code |
| ECN | Explicit Congestion Notification |
| EC-n | Electrical Carrier (e.g., EC-1) |
| ECSA | Exchange Carriers Standards Assoc |
| ED | Ending Delimiter |
| EDFA | Erbium-Doped Fiber Amplifier |
| EDI | Electronic Data Interchange |
| EDSX | Electronic Digital Signal Cross-Connect |
| EFCI | Explicit Forward Congestion Indication |
| EFD | Event Forwarding Discriminator |
| EFS | Error Free Seconds |
| EGP | Exterior Gateway Protocol |
| ELEC | Ethernet Local Exchange Carrier |
| ELFEXT | Equal Level Far End Crosstalk |
| EM | Element Manager |
| EMI | Electromagnetic Interference |
| EML | Element Management Layer |
| EMS | Element Management System |
| ENQ | Enquiry |
| EOC | Embedded Operations Channel |
| EOC | Embedded Overhead Channel |
| EOM | End of Message |
| EOT | End of Transmission |
| EPSCS | Enhanced Private Switch Controlled System |
| EPSCS | Enhanced Pvt Switched Comm Service |
| ERL | Echo Return Loss |
| ERM | Explicit Rate Marketing |
| ERS | Errored Second |
| ES | Errorred Second |
| ES | End System |
| ESB | Errored Second type B |
| ESF | Extended Superframe |
| ESFDL | Extended Super Frame Data-Link |
| ESG | Enhanced Service Gateway |
| ESS | Electronic Switching System |
| ET | Exchange Termination |
| ETAG | End of TAG |
| ETN | Electronic Tandem Network |
| ETO | Equalized Transmit Only |
| ETSI | European Telecommunications Standards Institute |
| ETX | End of Text |
| EXZ | Excess Zeros |
| F | Final/Framing |
| FAD | Frame Assembler/Disassembler |
| FADU | File Access Data Unit |
| FAS | Frame Alignment Signal |
| FAW | Frame Alignment Word |
| FB | Framing Bit |
| FBWA | Fixed Broadband Wireless Access |
| FC | Frame Control |
| FCC | Federal Communications Commission |
| FCOT | Fiber optic Central Office Terminal |
| FCS | Frame Check Sequence |
| FDDI | Fiber Distributed Data Interface |
| FDI | Feeder Distribution Interface |
| FDL | Facilities Data Link |
| FDM | Frequency Division Multiplexing |
| FDMA | Frequency Division Multiple Access |
| FE | Frame synchronization bit error Event |
| FEA | Far End Alarm |
| FEAC | Far End Alarm and Control |
| FEBE | Far End Block Error |
| FEBE-f | Far End Block Error Count - fast data |
| FEBE-i | Far End Block Error Count - interleaved data |
| FEC | Forward Error Correction |
| FECC-f | Forward Error Correction Count - fast data |
| FECC-i | Forward Error Correction Count - interleaved data |
| FECN | Forward Explicit Congestion Notification |
| FELB | Far End Loop Back |
| FEP | Front-End Processor |
| FERF | Far End Receive Failure |
| FEXT | Far-End Cross Talk |
| FGA | Feature Group A |
| FH | Frame Handler |
| FHSS | Frequency Hopping Spread Spectrum |
| FI | Facility Identification |
| FIB | Forward Indicator Bit |
| FIC | Frame Identification Code |
| FID | Format IDentification |
| FIFO | First In/First Out |
| FISU | Fill-In Signaling Unit |
| FITL | Fiber In The Loop |
| FLL | Fixed Loss Loop |
| FO | Fiber Optic |
| FOTS | Fiber Optical Transmission System |
| FPDU | Frame relay Protocol Data Unit |
| FPS | Framing Pattern Sequence |
| FR | Frame Relay |
| FR PVC | Frame Relay Permanent Virtual Connection |
| FRAD | Frame Relay Assembler/Disassembler |
| FRAD | Frame Relay Access Device |
| FRBS | Frame Relay Bearer Service |
| FRF-LMI | Frame Relay Forum - Local Management Interface |
| FRI | Frame Relay Interface |
| FRS | Frame Relay Service |
| FRS | Frame Relay Switch |
| FRSS | Frame Relay Switching System |
| FR-SSCS | Frame Relay Service Specific Convergence Sub-layer |
| FS | Failed Second |
| FS | Frame Status |
| FSK | Frequency Shift Keying |
| FSN | Forward Sequence Number |
| FT-1 | Fractional T-1 |
| FTAM | File Transfer, Access, & Mgmt |
| FTP | File Transfer Protocol |
| FTSC | Federal Telecommunications Standards Committee |
| FTTC | Fiber to the Curb |
| FTTH | Fiber to the House |
| FTTL | Fiber to the Loop |
| FTTN | Fiber to the Neighborhood |
| FUNI | Frame (relay) User Network Interface |
| FX | Foreign Exchange |
| FXO | Foreign Exchange Office |
| FXS | Foreign Exchange Subscriber |
| FXS | Foreign Exchange Station |
| GBS | General Broadcast Server |
| GFC | Generic Flow Control |
| GFI | General Format Identifier |
| GGP | Gateway to Gateway Protocol |
| GGSN | Gateway GPRS Support Node |
| GNE | Gateway Network Element |
| GOS | Grade of Service |
| GOSIP | Government Open System Interconnection Profiles |
| GPRS | General Packet Radio Service/System |
| GPS | Global Positioning System |
| GS | Ground Start |
| GSM | Global System for Mobile (telecommunications) |
| GTXC | Global Telephone Exchange Carrier |
| HCDS | High Capacity Digital Service |
| HCM | High Capacity Multiplexing |
| HCS | Header Check Sequence |
| HCV | High Capacity Voice |
| HDB3 | High-Density Bipolar Three-Bit substitution |
| HDLC | High-level Data Link Control |
| HDML | Handheld Device Markup Language |
| HDSL | High bit-rate Digital Subscriber Line |
| HDSL2 | High bit-rate Digital Subscriber Line w/ 6dB noise margin |
| HDT | Host Digital Terminal |
| HDTV | High Density TeleVision |
| HE | Header Extension |
| HEC | Header Error Control |
| HEL | Header Extension Length |
| HFC | Hybrid Fiber Coax |
| HIPPI | HIgh-speed Peripheral Parallel Interface |
| HLF | Higher Layer Functions |
| HLM | Heterogeneous LAN Mgmt |
| HLPI | High Layer Protocol Identifier |
| HLR | Home Location Register |
| HOPS | Horizontally Oriented Protocol Structure |
| HPAD | Host Packet Assembler-Disassembler |
| HRC | Hybrid Ring Control |
| HSCWD | High Speed Circuit Switched Data |
| HSSI | High Speed Serial Interface |
| HTML | Hypertext Markup Language |
| HTTP | Hypertext Transfer Protocol |
| HTU | HDSL Transmission Unit |
| HTU-C | HDSL Transmission Unit - Central Office |
| HTU-R | HDSL Transmission Unit - Remote |
| IA | Integrated Access |
| IAB | Internet Advisory Board |
| IAD | Integrated Access Device |
| IAM | Initial Address Message |
| IAT | Integrated Access Terminal |
| IBEX | Info Business Exchange - www.ibexsystems.com |
| IBR | Intermediate Bit Rate |
| ICB | Individual Case Basis |
| ICCF | Interexchange Carrier Compatibility Forum |
| ICI | InterCarier Interface |
| ICIP | Inter-Carrier Interface Protocol |
| ICL | Inserted Connection Loss |
| ICMP | Internet Control Message Protocol |
| IC-POT | Interexchange Carrier-Point of Termination |
| ID | Identification |
| IDCP | Internet Device Control Protocol |
| IDF | Intermediate Distribution Frame |
| IDLC | Integrated Digital Loop Carrier |
| IDS | Intrusion Detection System |
| IDT | Information Distribution Company |
| IDT | Integrated Digital Terminal |
| IDU | Interface Data Unit |
| IE | Information Element |
| IEC | Interexchange Carrier |
| IEEE | Institute of Electrical and Electronics Engineers |
| IETF | Internet Engineering Task Force |
| I-Frame | Information Frame |
| IG | Interface Group |
| IGP | Interior Gateway Protocol |
| IGRP | Interior Gateway Routing Protocol |
| IIME | Intra-network, Inter-SSS Mapping Entity |
| IIS | Internet Information Server |
| IISP | Interim Interswitch Signaling Protocol |
| ILEC | Incumbent/Independent Local Exchange Carrier |
| ILMI | Interim Local Management Interface |
| ILRM | Interim Local Management Interface |
| IMP | Interface Message Processors |
| IMPDU | Initial MAC Protocol Data Unit |
| IMS | Interactive Multimedia Server |
| IMSI | International Mobile Subscriber Identity |
| IN | Intelligent Network |
| INA | Information Network Architecture |
| IND | Indication |
| INE | Intelligent Network Element |
| INE | Intelligent Network Element |
| IO | Inter-Office |
| IOC | Inter-Office Channel |
| IOC | Inter-Office Channel |
| IP | Intelligent Peripheral |
| IP | Internet Protocol |
| IPM | Interpersonal Messaging System |
| IPS | Instructions Per Second |
| IPSec | Internet Protocol Security |
| IPX | Internet Packet eXchange |
| IS | Intermediate System |
| ISDN | Integrated Services Digital Network |
| ISDNUP | Integrated Services Digital Network User Part |
| ISDU | Isochronous Service Data Unit |
| ISID | Idle Signal Identification |
| ISM | Instrumentation, Scientific, and Medical |
| ISO | Intn'l Standards Organization |
| ISP | Internet Service Provider |
| ISSI | Inter-Switching System Interface |
| ISSIP | Inter-Switching System Interface Protocol |
| ISSP | Interim Interswitch Signaling Protocol |
| ISUP | ISDN User Part |
| ITFS | Instructional Television Fixed Services |
| ITU | International Telecommunication Union |
| IWF | InterWorking Function |
| IWU | InterWorking Unit |
| IXC | IntereXchange Carrier |
| JIS | Jurisdictional Interstate Service |
| JPEG | Joint Picture Expert Group |
| L2-PDU | Layer 2 Protocol Data Unit |
| LAN | Local Area Network |
| LAN PHY | LAN Physical Layer |
| LANE | LAN Emulation |
| LANE | Local Area Network Emulation |
| LAPB | Link Access Protocol Balanced |
| LAPD | Link Access Procedure D channel |
| LAPF | Link Access Protocol Frame relay |
| LATA | Local Access & Transport Area |
| LAW | Local Area Wireless |
| LBO | Line Build Out |
| LCA | Line Circut Address |
| LCGN | Logical Channel Group Number |
| LCI | Logical Connection Identifier |
| LCN | Logical Channel Number |
| LCP | Link Control Protocol |
| LCS | Lan Configuration Server |
| LDAP | Lightweight Directory Access Protocol |
| LDC | LATA Distribution Channel |
| LDM | Limited Distance Modem |
| LDS | Local Digital Switch |
| LEC | Lan Emulation Client |
| LEC | Local Exchange Carrier |
| LEN | Local Exchange Node |
| LEN | Line Equipment Number |
| LES | Lan Emulation Server |
| LET | Line Equipment Transfer |
| LFC | Local Functional Capabilities |
| LGE | Loop- or Ground-Start Exchange |
| LGS | Loop- or Ground-Start Subscriber |
| LI | Length Indicator |
| LIDB | Line Information Database |
| LIU | Line Interface Unit |
| LLB | Line Loop Back |
| LLC | Low Layer Compatibility |
| LLC | Logical Link Connection |
| LLC | Logical Link Control |
| LLDL | Low Level Data Link |
| LMC | Loop Maintenance Center |
| LMDS | Local Multipoint Distribution Service |
| LME | Layer Management Entity |
| LMI | Local Mgmt Interface |
| LMOS | Loop Maintenance Operations System |
| LMU | Line Monitor Unit |
| LNNI | Lan emulation Network-to-Net Interface |
| LNP | Local Number Portability |
| LOF | Loss Of Frame |
| LOH | Line Overhead |
| LOP | Loss Of Pointer |
| LOP-L | Loss Of Pointer - Line |
| LOP-P | Loss Of Pointer - Path |
| LOP-V | Loss Of Pointer - Virtual |
| LOS | Line Of Sight |
| LOS | Loss Of Signal |
| LOSW | Loss Of Synchronous Word |
| LPC | Linear Predictive Coding |
| LPDP | Local Policy Decision Point |
| LPU | Line Protection Unit |
| LRB | Loop Reverse Battery |
| LRN | Local Routing Number |
| LS | Loop Start |
| LSAP | Link Service Access Point |
| LSB | Least Significant Bit |
| LSMS | Local Service Management System |
| LSOA | Local Service Order Administration |
| LSSU | Link Status Signaling Unit |
| LSSU | Link Status Signal Unit |
| LT | Line Termination |
| LTE | Line Terminating Equipment |
| LTE | Line Terminal Equipment |
| LU | Logical Unit |
| LULT | Line Unit/Line Termination |
| LUNI | Lan emulation UNI |
| L-UNI | Lan emulation User Network Interface |
| LUNT | Line Unit Network Termination |
| LXT | Local Exchange Terminal |
| MAC | Media Access Control |
| MAC | Media Access Control |
| MAN | Metropolitan Area Network |
| MAN | Metropolitan Area Network |
| MAPDU | Management Application Protocol Data Unit |
| MAU | Media/Multiple Access Unit |
| MCU | Multiplexer Control Unit |
| MDCP | Media Device Control Protocol |
| MDF | Main Distribution Frame |
| MDS | Multipoint Distribution Service |
| MDTP | Media Device Transport Protocol |
| MF | Multiple Frequency |
| MFAS | Multi-Frame Alignment Signal |
| MGCP | Media Gateway Control Protocol |
| MGCP | Media Gateway Control Protocol |
| MIB | Management Information Base |
| MID | Muliplex Identifier |
| MID | Message Identifier |
| MIME | Multipurpose Internet Mail Extension |
| MIPS | Million Instructions Per Second |
| MIS | Mgmt Info System |
| MIS | Mgmt Info System |
| MIX | Multimedia Internet Exchange |
| MLHG | Multi-Line Hunt Group |
| MLM | Multi-Longitudinal Mode |
| MLT | Metalic Loop Test |
| MMDS | Multichannel Multipoint Distribution Service |
| MMDS | Multimedia Data Services |
| MMDX | Multimedia Data Services |
| MO | Managed Object |
| MOC | Managed Object Classes |
| MPEG | Motion Picture Expert Group |
| MPL | Maximum Packet Lifetime |
| M-PLANE | Management Plane |
| MPLS | Multi-Protocol Label Switching |
| MPLS | Multi-Protocol Layer Switching |
| MPoA | Multiple Protocol over ATM |
| MRF | Multilink Frame Relay |
| MSA | Metropolitan Statistical Area |
| MSDM | Multipoint Substrate Data Mux |
| MSO | Multiple Service Operator |
| MSP | Maintenance Svc Provider |
| MSS | MAN Switching System |
| MSS | MAN Switching System |
| MSU | Message Signaling Unit |
| MTAU | Metalic Test Access Unit |
| MTP | Message Transfer Part |
| MTS | Message Telephone System |
| MTSO | Mobile Telephone Switching Office |
| MTU | Max Trans Unit |
| MTU | Max Trans Unit |
| MUB | MultiUse Bearer service |
| MUX | Multiplexer |
| MVC | Multicast Virtual Circuit |
| MVNO | Mobile Virtual Network Operator |
Created by:
halibut
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