A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A

• AAM - Automated Availability Manager
• AC - Alternating Current.
• ACA - Australian Communications Authority
• ACO - Alarm Cut Off
• ACTA - Administrative Council for Terminal Attachments
• ADPCM - Adaptive Differential Pulse Coded Modulation
• AIS - Alarm Indication Signal
• AMI - Alternate Mark Inversion
• ANI - Automatic Number Identification
• ANSI - American National Standards Institute
• APS - See Automatic Protection Switching
• ARP - Address Resolution Protocol
• ASCII - American Standard Code for Information Interchange
• ATM - Ascynchronous Transfer Mode
• AU - Administrative Unit
• AUI - Attachment Unit Interface
• AWG - American Wiring Gauge

B

• B8ZS - Binary with 8 Zero Substitution
• BER - Bit Error Rate
• BERR - Bit Error Counter
• BERT - Bit Error Rate Test
• BES - Bursty Errored Seconds
• bmp - Bit Map file
• bps - Bits per Second
• BRC - Broadcast Connection
• BRM - Broadcast Master Connection

C

• CEFS - Consecutive Error-Free Seconds
• CERR - CRC Errors
• CHAP - Challenge Handshake Authentication Protocol
• CLEC - Competitive Local Exchange Carrier
• CLLI - Common Language Location Identifier
• CMI - Control Mode Idle
• CMOS - Complementary Metal Oxide Semiconductor
• CODEC - Encoder/Decoder
• CPE - Customer Premises Equipment.
• CRC - Cyclic Redundancy Check
• CRH - Channelized Router Hub
• CSA - Canadian Standards Association
• CSU - Channel Service Unit
• CTS - Clear to Send

D

• D4 - Super Frame
• DAC - Digital to Analog Converter
• DACS - Digital Access Crossconnect System
• DBM - Database Manager
• DC - Direct Current
• DCD - Data Carrier Detect
• DCE - Data Communications Equipment
• DCHP - Dynamic Host Configuration Protocol
• DCS - Digital Cross-Connect System
• DDS - Dataphone Digital Service
• DID - Direct Inward Dialing
• DIP - Dual Inline Package
• DLCI - Data Link Control Identifier
• DNS - Domain Name System
• DNX - Digital Network Exchange
• DO - Digital Out
• DPT - Dial Pulse Termination
• DS0 - Digital Signal Level 0
• DS1 - Digital Signal Level 1
• DS3 - Digital Signal Level 3
• DSL - Digital Subscriber Line
• DSR - Data Set Ready
• DTE - Data Terminal Equipment
• DTMF - Dual Tone Multi Frequency
• DTR - Data Terminal Ready

E

• E&M - Receive and Transmit
• EIA - Electronic Industries Association
• EMS - Element Management System
• EPP - End Point Port
• ERI - Eastern Research Incorporated
• ES - Errored Seconds
• ESF - Extended Superframe

F

• FAD - Facilities Access Digroup
• FCC - Federal Communications Commission
• FDX - Full Duplex Connection
• FIFO - First-In, First-Out
• FPGA - Field Programmable Gate Array
• FPGA - Field Programmable Gate Array
• FPO - Force Protection Online
• FS - Failed Second
• FSS - Foreign Exchange Office
• FTP - File Transfer Protocol
• FWO - Force Working Online
• FXS - Foreign Exchange Subscriber

G

• GUI - Graphical User Interface

H

• HALT - Highly Accelerated Life Testing
• HAM - High Availability Manager
• HDLC - High-Level Data Link Control
• HDSL - High-bit rate Digital Subscriber Line
• HSSD - DNX-1u's High Speed Synchronous Data subsystem

I

• IAD - Integrated Access Device
• IC - Integrated Circuit
• ICMP - Internet Control Message Protocol
• IEEE - Institute of Electrical and Electronics Engineers
• IP - Internet Protocol
• IPX - Internetwork Packet Exchange
• IS - In Service
• ISDN - Integrated Service Digital Netowrk
• ISP - Internet Service Provider
• ITU-T - International Telecommunication Union - Telecom
• IXC - Inter-exchange Carrier

K

• Kbps - Kilobits per second or one thousand bits per second

L

• L-DEST - Listen-Destination Connection
• L-SRC - Listen-Source Connection
• LAN - Local Area Network
• LBO - Line Build Out
• LED - Light Emitting Diode
• LIU - Line Interface Unit
• LL - Local Loop
• LMK - Left Mouse Key
• LOF - Loss of Frame
• LOS - Loss of Signal - DS1
• LSAD - DNX-1u's Low Speed Asynchronous Data subsystem

M

• MAIS - Multiframe AIS
• Mbps - Megabits per second or one million bits per second
• MERR - MFAS Error
• MFAS - Multiframe Alignment Sequence (CRc4 format)
• MIB - Management Information Base
• MYEL - Multiframe Yellow Alarm

N

• NAT - Network Address Translation
• NDR - N+1 Device Redundancy
• NDRG - N+1 Device Redundancy Group
• NE - Network Element
• NEBS - Network Equipment Building Systems
• NEP - Network Elements Panel
• NI - Network Interface
• NIC - Network Interface Card
• NMS - Network Management System
• NOC - Network Operations Center
• NVT - Network Virtual Terminal

O

• OCU - Office Channel Unit
• ODBC - Open Database Connectivity
• OHSD - Octal High Speed Module
• OOF - Out of Frame
• OOS - Out of Service
• OSPF - Open Shortest Path First
• OT1E1 - Octal T1/E1
• OVM - Octal Voice Module

P

• PAP - Password Authentication Protocol
• PCM - Pulse Code Modulation
• PCS - Personal Communications Service
• PDU - Protocol Data Unit
• Ping - Packet Internet Groper
• PLAR - Private Line Auto Ring
• PPP - Point-to-Point Protocol
• PSX - PSX-5300 Protection Switch

Q

• QOCU - Quad Office Channel Unit

R

• RADIUS - Remote Authentication Dial-In User Service
• RED - Red Alarm
• RFC - Request for Comments
• RIP - Routing Information Protocol
• RL - Remote Loop
• RM - Routing Manager
• RMK - Right Mouse Key
• RTS - Request to Send
• RXCLK - Receive Clock

S

• sa - System Administrator
• SDH - Synchronous Digital Hierarchy
• SDSL - Single-Line Digital Subscriber List
• SEF - Severely Errored Frames
• SES - Severely Errored Seconds
• SLIP - Serial Line Internet Protocol
• SMC - System Manager Card
• SNMP - Simple Network Management Protocol
• SONET - Synchronous Optical Network
• SQL - See Structured Query Language.
• STS1 - Synchronous Transport Signal Level 1
• SUBCH - Subchannel Connection
• SUBSW - Subrate Switching Connection
• SYNC - Synchronous
• Syslog - System Log

T

• TAD - Test Access Digroup
• TAP - Test Access Port
• TCP - Transmission Control Protocol
• TDM - Time Division Multiplexing
• TFTP - Trivial File Transfer Protocol
• TU - Tributary Unit
• TUG - Tributary Unit Group

U

• UDP - User Datagram Protocol
• UL - Underwriter's Laboratories

V

• VAN - Value Added Network
• VC - Virtual Container
• VCMP - Voice Compression Connection
• VT - Virtual Tributary

W

• WAN - Wide Area Network

Y

• YEL - Yellow Alarm