Alcatel 060170-10, User Manual, Page: 165 / 430

VoIP Commands
Page 5-23
Command Usage
Set outgoing H.323 Fast Start mode for gateway (on/off).
Syntax Options
Remarks
Fast Start commands take effect immediately and do not require use of the
voice daughter card
activate
command.
This command selects H.323 Fast Start mode on the outgoing side of the link. Fast Start mode
reduces the number of messages exchanged between endpoints.
H.323 Fast Start calls connect after a single round-trip message. The Fast Start information is
attached to H.225 messages from general setup. H.225 setup messages contain information
about voice channels proposed by the originator of the call. The terminating endpoint accepts
one of the proposed channels, and informs the originator through the connect message. The
connected endpoints then establish logical channels and switch to voice mode. Ringback is
sent inband and the voice path exists when the remote endpoint picks up the phone. If the
terminating endpoint picks up the phone before the voice channels are established, the origi-
nator receives the voice signal directly with no preceding ringback.
If Fast Start calls do not connect in the voice switching daughtercard, the switch automati-
cally reverts the call to the general H.323 setup; this prevents Fast Start calls from being
dropped.
H.225, which provides the call setup and control signaling needed to connect h.323
endpoints, is part of the H.323 signaling protocol stack. Q.931 is a similar protocol used over
ISDN lines to set up, maintain and terminate calls between H.323 endpoints or agents.
voice daughter card h.323 out fast start
voice daughter card <
slot/card_number
> h.323 out[going] fast start {on | off}
Definitions:
slot
Specifies the chassis slot number where VSM is installed, (e.g.,
2
).
card_number Specifies the voice daughtercard position number, (e.g.,
1
).
going
Optional command syntax. Type either
out
or
outgoing
in the command line.
on
Turns ON H.323 outgoing fast start for specified voice network.
off
Turns OFF H.323 outgoing fast start for specified voice network.
Default:
The default setting is
on
.
Command Examples:
voice daughter card 2/1 h.323 outgoing fast start off
voice daughter card 2/2 h.323 out fast start on