Call routing
191
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
For the trunk group setting Depends on destination, the following responses apply:
• The call arrives at a user:
All collect calls are rejected if the parameter Allow collect call is deactivated in the
user's assigned permission set.
• The call arrives at a system destination which automatically answers the call
(e.g.voice mail system):
All collect calls are rejected.
• For calls from the public ISDN network, the following also applies:
– All collect calls are rejected if the call arrives at a user group whose parameter
Offer collect calls is deactivated.
If the parameter Offer collect calls is activated, collect calls are offered to those
user group members whose permission set has the parameter Allow collect calls
activated.
– The call goes to an external destination (e.g.via forwarding or if the call is to a
PISN user):
The external destinations are not called.
Note:
For calls coming in via the SIP network interface, all calls are handled like collect calls from the
public ISDN.
6. 4 Outgoing traffic
All outgoing calls are routed to a network via a route. The authorization to make outgo-
ing calls can be specified for each user (page 203
). Digit barring facilities can also be
used to regulate dialling access on the basis of the numbers dialled (page 192). The
feature "Priority exchange allocation" can be used to give priority to a user wishing to
set up an outgoing call (page 203
). The LCR (Least Cost Routing) function is used to
control automatically the path (in the communication server and in the network) via
which an outgoing call is to be routed (page 207).
6. 4. 1 Routing
All outgoing calls are routed to a trunk group via a route. They include calls routed via
the Least Cost Routing function or transit calls in a PISN. Different types of call desti-
nations have to be routed via different routes. For example calls to the private leased-
line network must not be routed via the same routes as calls to the public network.
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