Lancom 1722 VOIP, Руководство пользователя, Страница: 77 / 136

LANCOM 1722 VoIP – LANCOM 1724 VoIP
Chapter 5: Configuring Voice over IP
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With the altered number, the Call Manager begins to search the call routing
table from top to bottom. If the Call Router cannot find a matching entry
there, the call is forwarded directly to the internal number:
5.2.2 Using VoIP telephony to extend the downstream ISDN PBX
This example shows how to configure a LANCOM when a downstream ISDN
PBX is enhanced with VoIP telephony capability. Until now, the MSNs '11' to
'13' for the ISDN connection have been used for two ISDN telephones and one
analog fax. The LANCOM will now be switched between the public ISDN con-
nection and the ISDN PBX.

The PBX is configured to allow subscribers to receive immediate
access to an outside line when they pick up the receiver.
This ISDN PBX is operated as a downstream PBX on the ISDN NT interface of
the LANCOM.
Remote site
dials Call Router
receives Assigned via number in
use correct call
route Desti-
nation
line
0 123 456 789 456 789 internal destination
number for SIP line 11 none internal
0 123 555 555 1 555 555 1 ISDN mapping 11 none internal
0 123 555 555 2 555 555 2 ISDN mapping 12 none internal