Numbering - Aastra OpenCom 100 Mounting And Commissioning User Manual

PBX Networking
In the above example, a route set up for PBX 1 allows a connection to PBX 2.
Bundle "C," "E" and "A" are assigned to this route. If a user connected to PBX 1
wants to reach a party in PBX 2, lines will be seized in the following order:
■
PBX 1 first searches for a free channel in the "C" bundle.
■
If all the lines in bundle "C" are busy, the system tries to set up a connection via
bundle "E". PBX 3 switches the connection through, provided it is appropriately
configured (refer to Numbering starting on page 160).
■
If it was not possible to set up an indirect connection via PBX 3, the system tries
again via bundle "A". The "prefix" necessary for this can be configured with the
route.
■
The user does not get a busy signal until the attempt to set up an indirect con-
nection via the network operator has also failed.
For each route you can define a randomly selectable code digit for seizing the
route. You can also configure whether a user is authorised to seize a particular
route, whether LCR is to be used for one of the bundle and the criteria (business or
private call, booking numbers) for evaluating call data.

12.3.3 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 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.
160
Note: If an internal connection is switched via a network op-
erator, the call is signalled using the external number of the
calling PBX.
Configuration