Proximus forum 523, Mounting And Commissioning Manual

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PBX Networking
Frequently Asked Questions 207
MSN on the ISDN telephone itself. For further information, refer to the User
Guide of your ISDN telephone.
Question: An ISDN telephone always rings, if another telephone on the
S
0
bus is being called.
This case also requires configuring the MSN on the ISDN telephone (see above
answer).
Question: It is not possible to configure Call Distribution: Outgoing for
multi-terminal access.
You have configured multi-terminal access and system access in parallel. All
outgoing calls are therefore established via system access, and outgoing call
distribution can be configured for system access only in the
Configurator
( Telephony: Call Distribution menu).
A specific MSN can be seized for individual calls by means of a code number
procedure. For further information, refer to the “Forum 500 / Forum 5000 –
Standard Terminals” user guide.
Question: What are some of the causes for problems when sending and/
or receiving faxes?
In frequent cases, the reason may be found in a problem with the ISDN-L1
reference clock distribution. The L1 clock is delivered from the network
provider. An unclean L1 clock distribution and the introduced signalling jitter is
overheard by the human ear. Nevertheless, data and fax transmissions may
be disturbed by the jitter. Please check, which ISDN lines will deliver the L1
clock. Details can be found under
L1 Clock starting on page 135.
The fax data transfer possibly is routed via a compressing VoIP connection.
Please verify, if the a/b port is configured with the “Fax” setting. For the VoIP
connection, select a VoIP profile which includes the non-compressing G.711
codec.
PBX Networking
Question: Why is it not possible to answer calls from another communica-
tions system via the missed calls list?
You get a call e.g. via a Q.SIG-IP / SIP tie line connection. Which line seizure
codes you will need to dial for the callback is not included automatically in the
information transferred with Q.SIG / SIP. Therefore, you need to setup the
callback in the bundle configuration. Call up the
Telephony : Trunks : Trunk