Polycom MGC Administrator, Руководство администратора

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Chapter 7 - Configuring the Gateway
7-18
Session Profile IP-to-ISDN
In this method, the destination endpoint number and the gateway session
configuration details are transferred to the gateway in the dialed number.
The H.323 endpoint dials the gateway prefix and the H.320 number (step 1 in
Figure 7-12, “IP-to-ISDN Call Flow Using Session Profile”), for example,
8390*8254050.
Figure 7-12: IP-to-ISDN Call Flow Using Session Profile
The Prefix 83 needs to be configured in the Gatekeeper and is listed in the
H.323 Network Service as the prefix. The indicated asterisk (*) is the
delimiter and the digits 8254050 represent the destination endpoint ISDN
number. The number is sent to the gatekeeper where the digits 83 identify the
gateway (step 2 in Figure 7-12
) . The gatekeeper returns the IP address of the
gateway (step 3 in Figure 7-12) to the endpoint. The call is then routed to the
gateway (step 4 in Figure 7-12) including the ISDN number of the destination
endpoint. The gateway dials the ISDN number and connects the endpoint to
the conference (step 5 in Figure 7-12) using the call parameters defined in the
Session Profile whose ID is 90.
Session Profile IP-to-IP
In this method, endpoint details are transferred to the gateway in the dialed
number. It is used when an internal H.323 endpoint calls an external IP