Call routing
182
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
6. 2. 3 Internal Digit Barring
There are several digit barring options available for internal traffic. The same rules
apply as for external digit barring facilities (see "Digit barring", page 207).
6. 2. 4 Internal ringing duration
The ringing time for an internal user can be configured from 30 to 18000 seconds in
the AMS Configuration Manager using the Internal ringing duration. The call con-
nection is disconnected once that time has elapsed. The timer is restarted if the call
is forwarded after a set time (e.g. with Call Deflection or Default call forwarding if no
answer).
Note:
With calls from the PSTN the connection is cleared down by the network
provider, usually after approx. 2 minutes.
If the external call is answered by the announcement service, the call is
considered as switched through for the PSTN. As long as the caller is
switched to announcement service, a ringing tone is generated internally.
The configured internal ringing time is therefore also a decisive criterion
for clearing down the connection.
6. 3 Incoming Traffic
6. 3. 1 Routing
Network interfaces with the same network-specific characteristics are all grouped
together in a trunk group. It is for example specified whether the network inter-
faces allocated to a trunk group are connected to a private leased-line network or
to the public network.
A call is routed via a trunk group to a direct dialling plan, a call distribution element
or a destination with a number from the internal numbering plan.
Each direct dial number is allocated a call distribution element. Several direct dial
numbers can be allocated to the same call distribution element.
A call distribution element is allocated destinations depending on the switch
group and switch position (see "Call destination", page 130).
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