BELGACOM Forum 523, Mounting And Commissioning Manual

Page: 225 / 244

PBX Networking 223
Frequently Asked Questions
This case also requires configuring the MSN on the ISDN tele-
phone (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 155.
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
communications system via the missed calls list?
You get a call e.g. via a direct Q.SIG connection. Which line sei-
zure codes you will need to dial for the callback is not included
automatically in the information transferred with Q.SIG. There-
fore, you need to setup the callback in the bundle configuration.