Routing elements
118
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
Generating a Ring-back Tone
With the settings outgoing call, ring-back tone and incoming call, ring-back tone the
system is able to control, within certain limitations, the generation of the ring-back
tone on digital trunk connections. These settings do not have to be altered in nor-
mal operation.
• In the case of a stand-alone communication server on the public network the
ring-back tone is supplied by the local exchange and does not have to be gener-
ated by the communication server.
• In a PISN with QSIG networking the ring-back tone always has to be generated in
the destination PINX. In this case the setting Incoming call, ring-back tone = Gen-
erate is set permanently and cannot be altered.
Here are two applications in which the settings do have to be adapted:
• In a PISN with networking via DSS1 protocol the ring-back tone is normally also
generated in the destination PINX (Incoming call, ring-back tone = Generate)
There are however exceptions (e.g. communication server integrated in Cen-
trex
1)
) where the ring-back tone does not have to be generated internally. In
such cases select the setting Incoming call, ring-back tone = Do not generate.
• It is possible that the destination does not generate a ring-back tone. (e.g. exter-
nal IP gateways). In such cases it is possible to generate the ring-back tone lo-
cally. To do so, select the setting Outgoing call, ring-back tone = Generate.
Note:
If several PINXs are cascaded, generate the ring-back tone only once
whenever possible and as close to the called user as possible.
Rerouting in the Exchange
The Partial rerouting (PARE) setting can be used to specify whether the system is au-
thorized to place exchange-to-exchange connections to the exchange via the
trunk group’s exchange lines. If the exchange lines of two trunk groups are in-
volved, this connection privilege must be granted to both trunk groups (see also
"Transferring Call Forwarding Unconditional to the Exchange", page 249).
This setting is possible only for trunk groups with Protocol = DSS1.
1)
depends on the network provider
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