Acronym
|
Definition
|
A
|
AAA
|
authentication, authorization, and accounting
|
AC
|
automatic callback
|
AC_ACT
|
automatic callback activation
|
AC_DEACT
|
automatic callback deactivation
|
ACR
|
anonymous call rejection
|
ACR_ACT (ACRA)
|
anonymous call rejection activation
|
ACR_DEACT (ACRD)
|
anonymous call rejection deactivation
|
ACRA (ACR_ACT)
|
anonymous call rejection activation
|
ACRD (ACR_DEACT)
|
anonymous call rejection deactivation
|
AGW
|
access gateway
|
AIN
|
Advanced Intelligent Network
|
AIOD
|
automatic identified outward dialing
|
ALI
|
automatic location identification
|
AMA
|
automated message accounting
|
ANC
|
announcements module
|
ANI
|
automatic number identification
|
ANS
|
announcement server
|
ANSI
|
American National Standards Institute
|
API
|
application programming interface
|
AR
|
automatic recall
|
AR_ACT
|
automatic recall activation
|
AR_DEACT
|
automatic recall deactivation
|
AT
|
access tandem
|
ATA
|
analog telephone adaptor
|
ATIS
|
Alliance for Telecommunications Industry Solutions
|
ATM
|
Asynchronous Transfer Mode
|
B
|
B-number
|
DN that a user enters as the forward-to number (also referred to as MN)
|
BCM
|
basic call module
|
BDMS
|
Bulk Data Management System
|
BEM
|
billing event message
|
BGDP
|
basic group dialing plan
|
BGL
|
business group line
|
BLA
|
billing adapter
|
BLISS
|
Broadband Local Integrated Services Solution
|
BLV
|
Busy Line Verification
|
BP
|
block pair
|
BRIDS
|
Bellcore rating input database system
|
BS
|
billing server
|
BTA
|
basic trading area
|
C
|
CA
|
call agent
|
CAC
|
carrier access code
|
CALEA
|
Communications Assistance for Law Enforcement Act
|
CAMA
|
centralized automatic message accounting
|
CAS
|
channel-associated signaling
|
CAT
|
customer access treatment
|
CATV
|
Community Antenna Television
|
CBLK
|
call block (reject caller)
|
CBR
|
constant bit rate
|
CBWFQ
|
class-based weighted fair queuing
|
CCS
|
common channel signaling
|
CCW
|
cancel call waiting
|
CDB
|
call data block
|
CDP
|
custom dial plan
|
CDR
|
call detail record
|
CE
|
computing element
|
CFB
|
call forwarding on busy
|
CFBVA
|
call forwarding on busy variable activation
|
CFBVD
|
call forwarding on busy variable deactivation
|
CFNA
|
call forwarding on no answer
|
CFNAVA
|
call forwarding on no answer variable activation
|
CFNAVD
|
call forwarding on no answer variable deactivation
|
CFU
|
call forwarding unconditional
|
CFUA
|
call forwarding unconditional activation
|
CFUD
|
call forwarding unconditional deactivation
|
CFVBBG
|
call forwarding variable for basic business group
|
CFVABBG
|
CFVBBG activation
|
CFx
|
A general reference to all of the forwarding features (CFB, CFNA, and CFU)
|
CHD
|
call hold
|
CIC
|
circuit identification code, carrier identification code
|
CID
|
calling identity delivery, also caller ID (see also CND)
|
CIDB
|
calling identity delivery blocking
|
CIDCW
|
calling identity delivery on call waiting
|
CIDS
|
calling identity delivery and suppression (per call)
|
CIDSD
|
calling identity delivery and suppression (per call)—delivery part
|
CIDSS
|
calling identity delivery and suppression (per call)—suppression part
|
CIP
|
carrier identification parameter
|
CLASS
|
custom local area signaling services
|
CLC
|
Carrier Liaison Committee
|
CLEC
|
competitive local exchange carrier
|
CLEI
|
common language equipment identifier
|
CLI
|
command-line interface
|
CLIP
|
calling line ID presentation
|
CLIR
|
calling line ID restriction
|
CLLI
|
Common Language Location Identifier
|
CMIP
|
Common Management Information Protocol
|
CMS
|
call management system, call management server
|
CMTS
|
cable modem termination system
|
CNAB
|
calling name delivery blocking
|
CNAM
|
calling name delivery
|
CND
|
calling number delivery, calling number display
|
CNDB
|
calling number delivery blocking
|
CNM
|
connection module, customer network management
|
CO
|
central office
|
COCUS
|
central office code utilization survey
|
CODEC
|
coder/decoder, compression/decompression
|
COPS
|
Common Open Policy Service Protocol
|
CORBA
|
Common Object Request Broker Architecture
|
COS
|
class of service
|
COT
|
customer-originated trace, continuity testing, central office termination
|
CPCN
|
certificate of public convenience and necessity
|
CPE
|
customer premises equipment
|
CPRK
|
call park
|
CPRK_RET
|
call park retrieve
|
CPSG
|
call park subscriber group
|
CPU
|
call pickup, central processing unit
|
CS
|
capability set (for example, CS-2)
|
CSA
|
callpath services architecture
|
CSN
|
circuit switched network
|
CSR
|
carrier sensitive routing
|
CT
|
call transfer, call type
|
CW
|
call waiting
|
CWI
|
call waiting indication
|
D
|
DA
|
directory assistance, distinctive alerting
|
DACWI
|
distinctive alerting call waiting indication
|
DF
|
delivery function (CALEA)
|
DID
|
direct inward dialing
|
DLEC
|
data local exchange carrier
|
DN
|
directory number
|
DND
|
do not disturb
|
DNIS
|
dialed number identification service
|
DNS
|
Domain Name System
|
DOCSIS
|
Data Over Cable Service Interface Specification
|
DOD
|
direct outward dialing
|
DOW
|
day of week
|
DOY
|
day of year
|
DP
|
dial plan, dial pulse, demarcation point
|
DPC
|
destination point code
|
DPN
|
directed call pickup without barge-in
|
DPN_O
|
directed call pickup without barge-in (originate)
|
DPN_T
|
directed call pickup without barge-in (terminate)
|
DPU
|
directed call pickup with barge-in
|
DPU_O
|
directed call pickup with barge-in (originate)
|
DPU_T
|
directed call pickup with barge-in (terminate)
|
DQoS
|
dynamic quality of service
|
DRCW
|
distinctive ringing/call waiting
|
DRCW_ACT
|
distinctive ringing/call waiting activation
|
DSA
|
dynamic service addition
|
DSC
|
dynamic service change
|
DSCP
|
differentiated services code point
|
DSL
|
digital subscriber line
|
DSP
|
digital signal processing
|
DSX
|
digital system cross-connect frame
|
DTMF
|
dual tone multifrequency
|
E
|
E1
|
Wide-area digital transmission scheme used predominantly in Europe that carries data at a rate of 2.048 Mbps. European equivalent of T1.
|
E3
|
Wide-area digital transmission scheme used predominantly in Europe that carries data at a rate of 34.368 Mbps. European equivalent of T3.
|
E-911
|
Enhanced 911
|
E & M
|
"Ear and Mouth." Switch-to-switch signaling on PSTN
|
EA
|
equal access
|
EC
|
echo cancellation
|
ECSA
|
Exchange Carriers Standards Association
|
EDP
|
event detection point
|
EM
|
event message
|
EMS
|
Element Management System, Event Messages Specification (PacketCable™)
|
eMTA
|
embedded multimedia terminal adapter
|
ERC
|
easily recognizable codes
|
ERQNT
|
Embedded Request for Notification
|
ESB
|
Emergency Service Bureau
|
ESL
|
emergency service line
|
ESP
|
encapsulating security payload
|
ETSI
|
European Telecommunications Standards Institute
|
F
|
FCAPS
|
fault, configuration, accounting, performance, security
|
FCI
|
furnish charging information
|
FCP
|
Feature Control Protocol
|
FGB
|
Feature Group B
|
FGD
|
Feature Group D
|
FIM
|
feature interaction manager
|
FS
|
Feature Server
|
FSAIN
|
Feature Server for Advanced Intelligent Network services
|
FSPTC
|
Feature Server for POTS, Tandem, and Centrex services
|
FTP
|
File Transfer Protocol
|
FXO
|
Foreign Exchange Office
|
FXS
|
Foreign Exchange Station
|
G
|
GAP
|
generic address parameter
|
GSM
|
global system for mobile communications
|
GUI
|
graphical user interface
|
H
|
HFC
|
hybrid fiber coaxial
|
HLR
|
home location register
|
HNPA
|
home numbering plan area
|
HSI
|
H.323 signaling interface
|
HTML
|
HyperText Markup Language
|
HTTP
|
Hypertext Transfer Protocol
|
I
|
IAD
|
integrated access device
|
IANA
|
Internet Assigned Numbers Authority
|
IAP
|
intercept access point
|
ICAP
|
Inter-call Agent Protocol
|
ICMP
|
Internet Control Message Protocol
|
IDDD
|
international direct distance dialing
|
IE
|
information element
|
IETF
|
Internet Engineering Task Force
|
IKE
|
Internet key exchange
|
ILEC
|
incumbent local exchange carrier
|
IMT
|
intermachine trunk
|
IN
|
intelligent network
|
INC
|
Industry Numbering Committee
|
IP
|
Internet Protocol
|
IPM
|
impulses per minute
|
IPsec
|
Internet Protocol security
|
IPT
|
IP-based telephony
|
IRDP
|
ICMP Router Discovery Protocol
|
ISA
|
ISDN adapter
|
ISDN
|
Integrated Services Digital Network
|
ISFG
|
incoming simulated facility group
|
ISO
|
International Organization for Standardization
|
ISP
|
Internet service provider
|
ISS
|
ISDN stack
|
ISUP
|
ISDN user part
|
ITP
|
IP transfer point
|
ITU
|
International Telecommunications Union
|
IVR
|
interactive voice response
|
IXC
|
interexchange carrier
|
J
|
JCA
|
Java cryptography architecture, Java console agent
|
JCM
|
Java console module
|
JDBC
|
Java database connectivity
|
JMS
|
Java message service
|
K
|
KAM
|
keepalive module
|
kbps
|
kilobits per second
|
L
|
LAN
|
local-area network
|
LATA
|
local access and transport area
|
LCR
|
least cost routing
|
LDAP
|
Lightweight Directory Access Protocol
|
LEC
|
local exchange carrier
|
LERG
|
local exchange routing guide
|
LI
|
lawful intercept
|
LIDB
|
line information database
|
LLQ
|
low-latency queuing
|
LNP
|
local number portability
|
LPC
|
local point code
|
LRN
|
local routing number
|
LRQ
|
location request (H.323 signaling)
|
LRU
|
least recently used
|
LSA
|
local serving area
|
LSSGR
|
LATA Switching Systems Generic Requirements
|
M
|
Mbps
|
megabits per second
|
MCF
|
multiple call forwarding
|
MCS
|
media gateway control stack
|
MDC
|
midcall
|
MDN
|
multiple directory numbers
|
MDRR
|
modified deficit round robin. A queuing strategy in which nonempty queues are served one after another, in round-robin fashion.
|
MF
|
multifrequency
|
MG (MGW)
|
media gateway
|
MGA
|
media gateway adapter
|
MGC
|
media gateway controller
|
MGCP
|
Media Gateway Control Protocol
|
MGW (MG)
|
media gateway
|
MIB
|
Management Information Base
|
MIME
|
Multipurpose Internet Mail Extensions
|
MLHG
|
multiline hunt group
|
MN
|
See B-number
|
MNM
|
maintenance module
|
ms
|
millisecond
|
MSA
|
Metropolitan Statistical Area
|
MSO
|
Multiple Systems Operator
|
MSOC
|
multiservice over cable
|
MSU
|
message signal unit
|
MTA
|
multimedia terminal adapter
|
MTP
|
Message Transfer Part
|
MTU
|
maximum transmission unit
|
MWI
|
message waiting indicator
|
N
|
NANP
|
North American Numbering Plan
|
NAS
|
network access server
|
NCS
|
network-based call signaling
|
NE
|
network element
|
NEBS
|
Network Equipment Building Standards
|
NFAS
|
Non-Facility Associated Signaling
|
NIS
|
Network Information Service
|
NMS
|
network management system
|
NO
|
network operator
|
NOC
|
network operations center
|
NOD
|
nature of dial
|
NPA
|
Numbering Plan Area
|
NSE
|
name signaling event
|
NTP
|
Network Time Protocol
|
NU
|
network unit
|
nxx
|
NANP digits: n=2, 3, ...9 and x=0, 1, ...9
|
O
|
OAM
|
Operation, Administration, and Maintenance, Operations, Administration module
|
OAM&P
|
Operations, Administration, Maintenance, and Provisioning
|
OBCSM
|
originating basic call state machine
|
OCB
|
outgoing call barring
|
OCN
|
operating company number
|
OI
|
operator interrupt
|
OLI
|
originating line information
|
OPC
|
originating point code
|
OPT
|
Open Packet Telephony
|
OS
|
operating system
|
OSA
|
open service adapter
|
OSFG
|
outgoing simulated facility group
|
OSI
|
Open Systems Interconnection
|
OSS
|
operations support system
|
OSSGR
|
Operator Services Systems Generic Requirements
|
P
|
PBX
|
private branch exchange
|
PCI
|
protocol control information
|
PCM
|
pulse code modulation
|
PCMA
|
pulse code modulation a-law
|
PCMU
|
pulse code modulation mu-law
|
PCPS
|
per-call presentation status
|
PCS
|
personal communications services
|
PCSNDB
|
personal communications services numbering database
|
PDU
|
power distribution unit
|
PIC
|
presubscribed interexchange carrier, point in call
|
PLT
|
platform
|
POI
|
point of interface, point of interconnection
|
POP
|
point of presence
|
POPD
|
public office dialing plan
|
POSIX
|
Portable Operating System Interface UNIX
|
POTS
|
plain old telephone service
|
PPP
|
Point to Point Protocol
|
PPQ
|
point to point queuing
|
PPS
|
permanent presentation status
|
PRI
|
primary rate interface
|
PS
|
presentation status
|
PSAP
|
public safety answering point
|
PSTN
|
public switched telephone network
|
PVC
|
permanent virtual circuit
|
Q
|
QoS
|
quality of service
|
QSIG
|
Q (point of the ISDN model) Signaling. Signaling standard. Common channel signaling protocol based on ISDN Q.931 standards and used by many digital PBXs.
|
R
|
RACF
|
remote activation of call forwarding
|
RACF-PIN
|
remote activation of call forwarding personal ID number
|
RADIUS
|
Remote Authentication Dial-In User Service
|
RAID
|
redundant array of inexpensive disks
|
RAS
|
Registration, Admission, and Status protocol. A protocol that is used between endpoints and the gatekeeper to perform management functions. The RAS signaling function performs registration, admissions, bandwidth changes, status, and disengage procedures between the VoIP gateway and the gatekeeper.
|
RCF
|
remote call forwarding
|
RDBS
|
routing database system
|
RDM
|
redundancy module
|
RDT
|
recall dial tone
|
RF
|
radio frequency
|
RFC
|
Request for Comment (IETF)
|
RGW
|
residential gateway
|
RIP
|
Routing Information Protocol
|
ROH
|
receiver off hook
|
RPC
|
remote point code, remote procedure call
|
RQNT
|
request for notification
|
RR
|
resource record
|
RSA
|
rural service area
|
RSIP
|
restart in progress
|
RSM
|
resource module
|
RSVP
|
Resource Reservation Protocol
|
RTM
|
routing module
|
RTP
|
Real-Time Transport Protocol
|
R-UDP
|
Reliable User Datagram Protocol (Cisco Systems proprietary signaling backhaul protocol)
|
S
|
S7A
|
SS7 adapter
|
S7S
|
SS7 stack (DGM&S)
|
SA
|
security association
|
SAC
|
service access call
|
SAI
|
signaling adapter interface
|
SC1D
|
speed call 1-digit
|
SC1D_ACT
|
speed call 1-digit activation
|
SC2D_ACT
|
speed call 2-digit activation
|
SCA
|
selective call acceptance
|
SCA_ACT
|
selective call acceptance activation
|
SCF
|
selective call forwarding
|
SCF_ACT
|
selective call forwarding activation
|
SCP
|
service control point, signal control point
|
SCR
|
selective call rejection
|
SCR_ACT
|
selective call rejection activation
|
SCTP
|
Stream Control Transmission Protocol
|
SDK
|
Software Development Kit
|
SDP
|
Session Description Protocol
|
SFG
|
simulated facility group
|
SFTP
|
Secure File Transfer Protocol (FTP)
|
SG
|
signaling gateway
|
SGCP
|
Simple Gateway Control Protocol
|
SIA
|
SIP adapter
|
SID
|
system identification number
|
SIM
|
service interaction manager
|
SIP
|
Session Initiation Protocol
|
SLE
|
screening list editing
|
SLTA
|
Signaling Link Test Acknowledgment (an SS7 signaling link test message type)
|
SLTM
|
Signaling Link Test Message (an SS7 signaling link test message type)
|
SM
|
Session Manager
|
SMA
|
SNMP adapter
|
SMDS
|
Switched Multimegabit Data Service
|
SMTP
|
Simple Mail Transfer Protocol. Internet protocol providing e-mail services
|
SNMP
|
Simple Network Management Protocol. A network management protocol used in TCP/IP networks.
|
SOHO
|
small office home office
|
SP
|
service provider
|
SPCS
|
stored program control system
|
SQL
|
Structured Query Language
|
SRST
|
Survivable Remote Site Telephony
|
SS7
|
Signaling System 7
|
SSF
|
service switching function
|
SSH
|
secure shell
|
SSL
|
secure sockets layer
|
SSP
|
service switching point, signal switching point
|
STP
|
signal transfer point
|
SVC
|
switched virtual circuit
|
T
|
T1
|
trunk level 1. Digital WAN carrier facility. T1 transmits DS-1-formatted data at 1.544 Mbps through the telephone-switching network.
|
T3
|
trunk level 3. Digital WAN carrier facility. T3 transmits DS-3-formatted data at 44.736 Mbps through the telephone-switching network. Compare with E3.
|
TAC
|
Cisco Technical Assistance Center
|
TAP
|
Telocator Alphanumeric Paging Protocol
|
TBCSM
|
terminating basic call state machine
|
TCAP
|
Transaction Capabilities Application Part
|
TCP
|
Transmission Control Protocol
|
TCP/IP
|
Transmission Control Protocol/Internet Protocol
|
TDD
|
telecommunications device for the deaf
|
TDM
|
time-division multiplexing
|
TDP
|
trigger detection point
|
TF
|
toll free
|
TG
|
trunk group
|
TGW
|
trunking gateway
|
TMN
|
Telecommunications Management Network
|
TNS
|
transit network selection
|
TOD
|
time of day
|
TOPS
|
traffic operator position system
|
TOS
|
type of service
|
TPM
|
terminating point master
|
TRS
|
telecommunications relay services
|
TSAP
|
transport service access point
|
TTY
|
text typewriter
|
TWC
|
three-way calling
|
U
|
UAA
|
user authentication adapter
|
UAC
|
user agent client
|
UAS
|
user agent server
|
uBR
|
universal broadband router (Cisco)
|
UCD
|
uniform call distribution
|
UDP
|
User Datagram Protocol
|
URI
|
uniform resource identifier
|
URL
|
universal resource locator
|
USTWC
|
usage-sensitive three-way calling
|
V
|
VBR
|
variable bit rate
|
VLAN
|
virtual LAN
|
VMWI
|
visual message waiting indicator
|
VoATM
|
Voice over ATM
|
VoIP
|
Voice over IP
|
VSC
|
vertical service code
|
W
|
WAN
|
wide-area network
|
WFI
|
waiting for instruction
|
WRED
|
weighted random early detection
|
X
|
xDSL
|
(generic) digital subscriber line
|
