T-Comfort Comfort Pro S, Mounting And Commissioning Manual

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126
PBX Networking Configuration
Numbering
A user can seize a particular route by pre-dialling a specific code digit. With this “open numbering”, a user
must always dial this code digit and then the telephone number in order to reach a party in another PBX.
If none of the telephone numbers in your PBX network occur twice, you can also configure “closed
numbering”, allowing the same telephone number to be used for reaching each user within the PBX network.
With closed numbering, the Comfort Pro S determines which route to seize from the telephone number
dialled. The information needed for routing a call can be configured in a numbering table containing up to
100 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 Comfort Pro S 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.
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
Route