ACD Automatic Call Distribution
AMA Automatic Message Accounting
ANI Automatic Number Identification
ANSI American National Standards Institute
B (Channel) A 64 kbps digital information channel
bps Bits per second
BRI Basic Rate Interface
CA Call Appearance
CCITT Consultative Committee for International Telegraphy and Telephony
CFDA Call Forwarding Don't Answer
CIC Carrier Identification Code
CLAMN Call Forwarding Address Modified Notification
CLID Calling Line Identification
CMD Circuit-mode-data
CND Calling Number Delivery
CPE Customer-premises-equipment
CR Call Reference
CSU/DSU Channel Service Unit/Data Service Unit
DLCI Data Link Connection Identifier
DMA Direct Memory Access
DMS Digital Multiplex Switching
DN Directory Number
DNIC Data Network Identification Code
DNS Data Network System
DSM Demand Side Management
DSP Display Station Protocol
EID Endpoint Identifier
EKTS Electronic Key Telephone Service
ESS Electronic Switching System
FEP Front End Processor
FTP File Transfer Protocol
FX Foreign Exchange
HLC High Layer Compatibility
ID Identification
IEC InterExchange Carrier
IMUX Inverse Multiplexer
INIC ISDN Network Identification Code
IOF Inter Office Facility
ISDN Integrated Services Digital Network
ISO International Standardization Organization
ITU-TSS International Telecommunications Union - Telecommunications
Standardization Section (formerly, CCITT)
kbps Kilobits per second
kHz Kilohertz
LAN Local Area Network
LATA Local Access and Transport Area
LC Logical Channel
LEC Local Exchange Carrier
LLC Logical Link Control (LAN)
LLC Low Layer Compatibility (ISDN)
MAC Medium Access Control
Mbps Megabits per second
MF Multi-Frequency Signaling
MLHG Multiline Hunt Group
MPEG Moving Pictures Experts Group
MR CMD Multi-rate Circuit Mode Data
NI-1 National ISDN-1
NI-2 National ISDN-2
NIIG NIUF ISDN Interface Group
NIPG NIUF ISDN Parameter Group
NIST National Institute of Standards and Technology
NIUF North American ISDN Users' Forum
NT Network Termination
NTSC National Television System Committee
NUI Network User Identification
OSI Open Systems Interconnection
PBX Private Branch Exchange
PHF Packet Handling Function
PMD Packet-Mode Data
POTS Plain Old Telephone Service
PPSN Public Packet Switched Network
PRI Primary Rate Interface
PSTN Public Switched Telephone Network
PVC Permanent Virtual Circuit
SFG Stimulated Facility Group
SPCS Stored Program Controlled Switching System
SPID Service Profile Identifier
SS7 Signaling System 7
SWF-DS1 Switched DS1/Switched Fractional DS1 Service Capability
T3 POS Transaction Processing Protocol for Point-of-Sale
TA Terminal Adapter
TCP/IP Transport Control Protocol/Internet Protocol
TE Terminal Equipment
TEI Terminal Endpoint Identifier
TSP Terminal Service Profile
UDI Unrestricted Digital Information
UUI User-to-User Information
VMS Voice Messaging System