CPS – Carrier Pre-Selection
IDA – Indirect Access
EDI - Electronic Data Interchange
CPE – Customer Premises Equipment
LCR – Low Cost Routing
PBX – Telephone System
PSTN – Single or Multiple Analogue Telephone Line
ISDN – Digital Telephone Line
ISDN 2 – Pair of digital lines, for voice or data
ISDN2 Complex – 2 or more digital lines for a telephone system,
max 4 x ISDN2 giving 8 lines
ISDN30e – Digital lines for a telephone system, 8 to 30 lines
ISDN DASS – no longer available – digital lines that can be partitioned by billing number – 1 to 30 lines
DDI – Direct Dial Inbound – individual telephone numbers
SNDDI – Single Number Direct Dial Inbound
CLIP – Caller Line Identity Presentation
CLOP – Connected Line Identity Presentation
CLIR – Calling Line Identity Restriction
COLR – Connected Line Identity Restriction
ICB – Permanent Incoming Barring
NTE – Network Terminating Equipment
CPE – Customer Premises Equipment
CR – Caller Redirect – ceases the line and forwards the call to another telephone number
Monthly option affects the call divert for one month then stops
Quarterly option is ongoing
Admin Call Forward/ Admin Call Diversion – calls are forwarded to an alternative telephone number, but the lines are not ceased
NGN - Next Generation Network
MSANs - Multi-Service Access Mode
