Polycom MGC Administrator, Руководство администратора

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MGC Administrator’s Guide
3-69
Port Port 1719 is the most common port that gatekeepers
listen to and transmit through.
Service Mode Each card registers with the gatekeeper with its IP
address and/or alias. The gatekeeper routes calls to
the card with available resources. If there is no
gatekeeper, calls that approach an IP card with
unavailable resources get a reject response, unless
Forwarding is enabled.
•
Basic [Least recommended] – Each IP card in
the MCU registers independently with the
gatekeeper. The H.323 endpoint dials directly to
this card, using the cards alias as registered with
the gatekeeper. The call is routed once only to the
MCU. If the card can accommodate the call, the
call is accepted. If the card cannot accommodate
the call, the call is rejected with no further effort
on behalf of the gatekeeper or the operator. In this
mode, using a prefix for dialing to the gatekeeper
is not required as there is no pooling of resources.
•
Board Hunting – In this mode, the Network
Service is registered with the gatekeeper and is
associated with a prefix. In addition, all the IP
network cards that belong to the same Network
Service register with the gatekeeper with the
same Network Service prefix. The same prefix is
also defined in the IP Network Service in the
MGC Manager.
When an IP call reaches the gatekeeper (using
the Network Service Prefix), the gatekeeper
identifies the Network Service according to the
prefix, and looks for the first available IP card on
the MCU according to the cards registered with
the gatekeeper for that Network Service.
Table 3-19: H.323 Dialog Box Parameters (Continued)
Field Description