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ular, this simplifies configuration of the Forum 523/524 as a sub-
sidiary system: the only entry you assign to the default entry is
the route to the host system
PBX
PBX
c
100-
200-
d
199
299
4: b
b
h
D: c
a
g
PBX
PBX
400-
500-
499
599
D: a
Example of closed numbering tables
The automatic switching of call requests (i.e. routing) by means of
bundle overflow or default numbering can lead to "circular switch-
ing".
To avoid this, a "transit" counter is incremented whenever a con-
nection is switched through on Q.SIG lines. When the configured
maximum value is reached, further switching stops.
Technical Details
A different PBX number must be set for each Forum 523/524 in a
PBX network. This setting can be found in the Web console, in the
menu Telephony: Settings under the heading QSIG linking.
You can also set the maximum value for the transit counter there.
This value depends on the topology of the PBX network and
should allow the system to have the maximum number of further
connections possible.
You can display the connection status of the lines at any time in
the Configurator menu System Info: Telephony: Trunks. You
should check this in particular after making changes to a configu-
ration to see whether all the lines used for system networking are
operable.
Some of the features possible in Q.SIG are not supported by
Forum 523/524 with all their options, for example callback on
busy within the Q.SIG network. The call categories defined in
Q.SIG (e.g. Emergency Call, Operator, Normal) and the Q.SIG
name transmission feature ("user names") are fully supported.
PBX
e
300-
f
399
3: e
5: k
k
5: h
D: f
D: d
i
3: i
D:Default
D: g
D:Route
Technical Details
PBX Networking
163
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