Technical Details
PBX Networking
237
entries. You use this table to assign telephone numbers and/or ranges of
telephone numbers to a particular route.
A
default
entry in the numbering table makes it possible to seize a “default
route” for all remaining unassigned numbers. In particular, this simplifies
configuration of the Forum 5004/5008/5012 as a subsidiary system: the
only entry you assign to the
default
entry is the route to the host system
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 switching”.
To avoid this, a “transit” counter is incremented whenever a connection 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 5004/5008/5012 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 configuration to see whether all the lines
used for system networking are operable.
Not all options of some Q.SIG are supported by the Forum 5004/5008/
5012, for example callback on busy within the Q.SIG network or route
optimising. The call categories defined in Q.SIG (e.g. Emergency Call,
PBX
200-
299
PBX
500-
599
PBX
300-
399
PBX
100-
199
PBX
400-
499
D: a
4: b
D: c
3: e
5: h
D: d
3: i
D: g
5: k
D: f
a
b
c
d
e
f
g
h
i
k
D:Default
D:
Route
