Polycom MGC Administrator, Руководство администратора

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MGC Administrator’s Guide
7-25
Configuration - General Settings dialog box. 1234 is the Alias
retrieved from the dial string and represents the destination endpoint.
Step 3. The remote gateway dials 1234 and connects the call.
H.323 Endpoint Over an H.323 Backbone to H.320 Endpoint,
Using the Address Book
In the Address Book method, the gateway includes a conversion table in
which each E.164 ID number is assigned a destination H.320 (ISDN/PSTN)
number. In this method, the destination endpoint details are taken from the
Address Book table. It is used when an internal IP endpoint calls an external
ISDN number.
The H.323 endpoint connects using the following string: [ local GW prefix ,
first GW Link ID ] * [ ISDN No. ], for example, 7011*1234.
Figure 7-18: IP-to-ISDN Over H.323 Backbone Call Flow Using Address Book
Step 1. The H.323 endpoint dials 7011*1234 representing the gateway prefix,
the Gateways Link ID, the Delimiter and ISDN number. The local
gateway dials the remote gateway using the string 7011*1234.
The digits 70 represent the local gateway prefix defined in the
Network Service Properties and 11 is the local Gateway Link ID
retrieved from the Gateway Link.
With the Address Book method, the gateway includes a conversion
table in which each E.164 ID number is assigned a destination phone