| ACD |
Automatic Call Distribution - The system used
to distribute calls through to those responsible for answering. |
| ADSL |
Asymmetric Digital Subscriber Line - Another
name for broadband with different upload and download speeds. |
| BRA |
Basic Rate Acces- Another name for ISDN2 Digital
phone lines |
| CCU |
Central Control Unit - The box on the wall
that runs your phone system |
| CLI |
Calling Line Identity - Your phone number |
| CPS |
Carrier Pre Selection - A service where you
can pre select who carries your phone calls on your BT line |
| CTI |
Computer Telephony Intergration - linking
your PC and phone together |
| DASS |
Digital Access Signalling System - An old
type of signalling used on phone lines now replaced with a Euro version. |
| DDI |
Direct Dial Inwards - used so people from
outside can dial straight through to your phone and bypass the switchboard |
| DPNSS |
Digital Private Network Signalling System - a
name given to signals used between 2 phone systems |
| DTMF |
Dual Tone Multi Frequency - The tones you
hear when you make a phone call |
| FPS |
Fax Preference Service - Stop unwanted faxes
(Junk Fax) coming in |
| ISDN |
Intergrated Services Digital Network - a
name for digital phone lines |
| ISP |
Internet Service Provider - who bills you
for your broadband is your ISP |
| ICSTIS |
Independent Committee for the Supervision of Telephone Information
Services |
| LLU |
Local Loop Unbundling - The ability for other
operators to use the cables between the phone exchange and your premises. |
| NGN |
Non Geographic Numbers - Phone numbers that
are not tied to an area such as 0800 freephone |
| OCB |
Outgoing Calls Barred - stops you dialling
out when it is applied to your phones |
| PSTN |
Public Switched Telephone Network - The phone
network |
| PABX |
Private Automatic Branch Exchange - A name
for a telephone system |
| PMBX |
Private Manual Branch Exchange - Another name
for a telephone system |
| SDSL |
Synchronous Digital Subscriber Line -Another
name for broadband with the same upload and download speeds. |
| SIP |
Session Initiation Protocol - another name
for signalling when making phone or data calls. |
| UPS |
Uninterrupted Power Supply - will keep your
phones up and working when there is a power cut. |
| VDSL |
Very high bandwidth DSL - a very fast internet
connection |
| VOIP |
Voice Over Internet Protocol - making phone
calls over the internet instead of over the phone line. |
| WAN |
Wide Area Network - computers from different
buildings linked together |
