PBX Networking Configuration
135
With closed numbering, the OpenCom 100 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 OpenCom 100 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 trunk group
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
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