Call routing
216
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
6. 5. 4. 1 Time zones
The time zones are used to allocate network providers depending on the time of day.
This means it is possible to take account of the fact that network provider 3 for example
is more cost effective at night than network provider 2
If the time at which a connection is set up is outside the defined time zones the call is
routed in accordance with the user configuration (without LCR function).
If the time indications of several time zones overlap, the time zone placed further up in
the table applies to the area of overlap:
Tab. 48 Example of overlapping time zones
Tab. 49 Zone 1 applies in the overlap area
6. 5. 4. 2 Alternative Routing (Fallback Routing)
If the LCR function realizes that access to the network provider initially selected is not
possible, a call is routed to the alternative network provider and an event message is
generated (LCR via alternative network provider).
The LCR function recognizes that access to a network provider is not possible if,
• if all the B channels in the selected route are busy or out of order,
• routing via the primary network provider is barred in the network provider table,
• the network signals to the communication server that the primary network provider
is not available (e.g. due to overloading).
Time zones Day(s) Time Primary carrier
Alternative network
operator
Zone 1 Mon-Fri 07:00-16:59 Network provider 1 Network provider 2
Zone 2 Mon-Sun. 00:00-23:59 Network provider 2 –
Time 00:00 to 06:59 07:00 to 16:59 17:00 to 23:59
Zone 1 Network provider 1
Zone 2
Network provider 2 Network provider 2
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