Call routing
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System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
For indirect access the phone number dialled must contain the following informa-
tion:
• Call number of the destination user.
• Network provider required (in the example network provider B).
• The code information (in the example for network provider B) used by B to check
whether the caller is a subscriber to his network.
Network provider A can respond to the call in the following way:
• He either routes the destination number on directly using his own numbering
plan.
• He takes the call and waits for code information, such as the destination number,
to be transmitted by the caller in DTMF mode.
6. 6. 2
LCR function
To be able to make outgoing phone calls, an internal user normally dials an ex-
change access prefix first.
If the LCR function is deactivated the communication server routes the call in ac-
cordance with the exchange access prefix dialled (see
).
If the LCR function is activated and able to analyse the phone number dialled, the
phone number will be routed in accordance with the configured LCR criteria. The
exchange access prefix is not analysed by the LCR function.
The LCR function can be activated or deactivated throughout the system. If it is ac-
tivated, it can be deactivated for individual users.
