PDF of this tutorialADPCM
adaptive pulse-code modulation
ANSI
American National Standards Institute
ATM
asynchronous transfer mode
BRI
basic rate interface
CED
CallED station IDentification
CELP
code excited linear prediction
CFR
confirmation to receive
CIR
committed information range
CNG
calling tone
CRC
cyclic redundancy check
CRP
command repeat
CSI
called subscriber information
DCN
disconnect message
DCS
digital command signal
DIS
digital identification signal
DLCI
data-link connection identifier
DSP
digital signal processor
DTMF
dual-tone multifrequency
E&M
ear & mouth, earth, and magneto
EOP
end of procedures
FIFO
first in, first out
FIU
facsimile interface unit
FM
fax modem unit
FND
fax network driver unit
FoIP
fax over Internet protocol
FP
fax protocol unit
FXO
foreign exchange office
FXS
foreign exchange station
HDLC
high-level data link control
IETF
Internet Engineering Task Force
IP
internet protocol
ISDN
integrated services digital network
ITU
International Telecommunications Union
IWF
interworking funtion
LMI
local management interface
MCF
message confirmation
MIB
management information base
MPS
multipage signal
NSF
nonstandard facilities
PBX
Private branch exchange
PCM
pulse code modulation
POTS
plain old telephone service
PRI
primary rate interface
PSTN
public switched telephone network
PVC
permanent virtual circuit
QoS
quality of service
RTCP
real-time conferencing protocol
RTP
real-time protocol
SVC
switched virtual circuit
TCF
training check field
TCP
Transmission Control Protocol
UDP
user datagram protocol
UNI
user network interface
V/FoIP
voice and fax over Internet protocol
VoFR
voice over frame relay
VoIP
voice over Internet protocol
VToA
voice telephony over ATM
