VoIP Service
229
SBX IP 320 Features & Operation Guide
•
Networking CO Group (PGM 322 - FLEX 1)
•
Networking Routing Table (PGM 324)
Early H.245
The early H.245 option allows the H245 channel to be setup earlier, and hence speeds up the
call setup. When early H245 is turned on, the H245 channel address is also supplied in the Setup
message. This speeds up the call because the H245 channel negotiations can proceed in parallel
to H225.
Admin Programming
•
Early H.245 (PGM 340 - FLEX 19)
H.245 Tunneling
Entities in the signalling path such as gatekeepers may perform functions such as divert on
no-reply or other advanced call control that results in representing to an endpoint a Q.931 call
state that is different from the actual call state at the other endpoint. Such intermediate entities
shall ensure that H.245 messages encapsulated in Q.931 messages are forwarded to the other
endpoint even if the Q.931 message in which the H.245 message is encapsulated would be
consumed and not forwarded to the other endpoint. This is accomplished by transferring the
encapsulated H.245 message into a FACILITY message with the h323-message-body set to
empty. For example, if a gatekeeper has already sent a CONNECT message to a calling endpoint
and later receives a CONNECT message from a called endpoint that contains an encapsulated
H.245 message, it must forward the H.245 message using a FACILITY message.
Admin Programming
•
H.245 Tunneling (PGM 340 - F20)
