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24IP
DIGITAL KEY TELEPHONE SYSTEM USER’S GUIDE
51
Commonly used Telephony Acronyms
Local Area Network
LAN
- Telephone that is served as Keyphone terminal.
DKTU, SLT, WHTU, ISDN Phone, IP Phone, ICM Box, etc.
Keyset
Integrated Service Digital Network
ISDN
Internet Protocol
IP
The facility of logically separating of stations into semi-autonomous zones
ICM Tenancy Group
Intercom Call (The call between two stations)
ICM Call
Intercom Box (or Door Phone)
ICM Box
Intercom
ICM
A group of stations
Hunt Group or Hunt
Hands Free (the intercom answer mode of hands free)
HF
Group
GRP
Flexible (Button) The user programmable button on DKTU
FLEX
External
EXT
Dual Tone Multi Frequency (the tone signaling protocol of the telephone
network)
DTMF
Direct Station Select (Button) (the flexible button that is assigned for ICM call to
specific station)
DSS
Domain Name System of the Internet protocol
DNS
Do Not Disturb
DND
Digital Key Telephone Unit
DKTU
Direct Inward System Access (of a CO incoming call via Auto Announcement)
DISA
Direct Inward Dialing (the public telephone network service of CO incoming call
to a specific destination)
DID or DDI
Digital European Cordless Telephone
DECT
The Call Ringing (or routing) state according the time and date
Day/Night/Weekend/On Demand
Computer Telephony Integration
CTI
Called Party Number (the destination number)
CPN
Class Of Service
COS
Central Office Line (the truck line of analog, ISDN, IP, etc)
CO or COL or CO Line
Central Office Line Group (the truck line group of analog, ISDN, IP, etc)
CO Group or CO GRP or CO Line
Group
Calling Line Identification /Presentation (the telephone number of the caller)
CLI / CLIP
The call distribution method of hunt group.
Circular Group
Caller ID
CID
Call Forward
CFW
Meaning
Abbreviation / Keywords