Important settings
27
Step by step
Class of service (COS)
You can assign one of eight classes of service (COS) to
each telephone
Æ page 32). It is possible, therefore, to block outgoing
calls to certain external numbers or to allow calls to
some of those numbers only. All classes of service al-
low external calls to be answered and internal calls to
be made.
Classes of service
• No trunk access (no permission:
External calls only can be established using the sys-
tem speed dial (once allowed by code 072), class 0.
• Outward-restricted trunk access:
You can only make external calls using the system
speed dialing phonebook or one of the permission
lists 1, 2 or 3 (Æ page 28).
• Restricted trunk access (with denied list:
You can make external calls but not to numbers on
denied lists 1, 2 or 3 (Æ page 27).
• Unrestricted trunk access (total permission):
You can make all Class 7 external calls.
Denied list
There are three lists of denied numbers that can be con-
figured with different telephone numbers and individual
extension prefix combinations.
• Denied list 1 (COS 1) with 10 entries
• Denied list 2 (COS 2) with 25 entries
• Denied list 3 (COS 3) with 35 entries
Telephones configured for restricted trunk access (with
denied list) cannot dial numbers that start with those
combinations. If you try to dial one of these numbers,
the extension will answer with a busy signal.
Even though restrictions are set by the lists, the num-
bers entered in the speed dialing directory can be ac-
cessed by dialing the assigned speed-dial numbers.
The denied list may contain some combinations already
recorded, depending on the country (Æ page 29).
These can be deleted if needed.
Required: Programming mode must be activated (*95
31994).
efg w Enter the programming code.
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