Abbreviated dialing
Agent features
Alert calling
Attendant
Authority code
Auto answer
Auto hold
Auto line selection
Auto transfer
Call forwarding
Call parking
Call pickup
Call transfer
Callback
Camp- on
Class-Of-Service
Conferencing
DISA
Distinctive ring
Do Not Disturb
Drop timeout
Exchange lines
External loud bell
External paging
Feature check
Feature codes
Forced Account Code
Forced call diversion
Group listen
Headset mode
Hold
Hot keypad
Hotline
Least Cost Routing
Lock / Unlock
Look-up
Messages
Music-on-hold
Mute
Names
No-ring transfer
Numbering plan
Off-hook Voice-Announce
Paging
Power-fail telephones
Private-to
Re-dialling
Reminder service
Service modes
SMDR
Tenant groups
Toll Restriction
U.C.D.
Virtual numbers

There is a large degree of freedom provided by the contents of the Toll Barring tables, allowing the tables to be constructed to meet any requirements a customer may have. At default, there is no toll restriction applied to outgoing exchange calls from any extension. Different restrictions can apply for the Day-1 (and Day-2 and Day-3) and Night service-modes. Toll restriction constraints can be applied to both extensions and exchange lines.

Toll restriction is used in conjunction with the extension's COS value to prevent an extension from dialling (or for an exchange line to be used to dial) specified telephone number-ranges while at the same time allowing them to dial those number-ranges for which they have access. Access can be denied or granted for a specified number range or for just a single telephone number.

It is essential that every extension can always have access to Emergency Calls (000) during all system operating modes.