Siemens HiPath 1120, Programming Manual

Page: 21 / 180

Main Configurations
21
Step by Step
Class Of Service (COS)
You can assign one of eight Classes Of Service (COS) to
each telephone
(see page 25). Thus, it is possible to block outgoing calls
to selected external numbers while allowing others to
proceed. All classes of service allow for answering
external calls and making internal calls.
Classes Of Service
• No Trunk Access (No Permission):
You can only make external calls using the System
Speed Dialing, 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 22).
• Restricted Trunk Access (with Denied List):
You can make external calls but not to numbers on
Denied Lists 1, 2 or 3 (
Æ
page 21).
• 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
configured with different telephone numbers and
individual extension prefix combinations.
• Denied List 1 (COS 1) with 4 entries
• Denied List 2 (COS 2) with 10 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
numbers entered in the Speed Dialing phonebook can
be accessed by dialing the assigned speed-dial
numbers.
The Denied List may contain some combinations
already recorded, depending on the country
(
Æ
page 24). These can be deleted if needed.