Vertical SBX IP 320 Service Manual download pdf (Page 262)

VoIP Service 252

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 - FLEX 20)

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Vertical SBX IP 320 Service Manual Page 262