Call routing
179
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
6. 2. 2 Dialling internal destinations via external call numbers
Internal users can also reach internal destinations by dialling an external call
number with the help of an allocation table in AMS. This is particularly helpful
when dialling with the aid of a phone book directory. In this way an internal and an
external call number do not have to be stored in the phone book directory.
When the communication server recognizes that it is an external call number, the
call number is checked against the entries in the allocation table (CM_3.1.8). If the
dialled call number matches an entry, the assigned internal call number is dialled
instead of the external call number. If no match is found, the external call number is
dialled.
Note:
If the dialled number does not contain a country code, the country code defined in
the corresponding region (CM_2.5.1.1) is automatically added to the call number
before the table is checked. This makes it possible to dial the call number with or
without the country code.
Example Switzerland:
[1] The call is routed to external if no entry is found for the dialled number in the allocation table.
[2] The call is routed to the internal destination which is assigned in the allocation table of the dialled exter-
nal number.
Fig. 76 Routing to an internal destination via the allocation table
Configuration:
• Regions – Country code: 41
• Numbering plan – Exchange access, business: 0
• Entry in the allocation table:
– External call number: +41326553867
– Internal call number: 3867
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