ADTRAN AOS Version R10.1.0 Command Reference Manual page 3583

Command Reference Guide
prefer reinvite-without-sdp
Use the prefer reinvite-without-sdp command to specify that Session Initiation Protocol (SIP) double
reInvite messages are included in calls involving the trunk, but that these messages do not include Session
Description Protocol (SDP). This command helps to determine which endpoint receives the SDP in the
double reInvite call flow. Using the no form of this command indicates that reInvite messages without
SDP are not preferred. Use the command
setting for this feature.
This command should only be issued by advanced users or at the direction of ADTRAN
technical support.
Syntax Description
No subcommands.
Default Values
By default, all trunk accounts prefer a double reInvite with SDP.
Command History
Release A5.01
Functional Notes
When a double reInvite is initiated, the first reInvite without SDP is not sent to the account that does not
require it. When both accounts do not require a reInvite with SDP, the target account sends the initial
reInvite message.
You can specify whether a re-Invite is preferred on the trunk using the command
page 3582. This command is used in the trunk's configuration to determine whether a double reInvite is
preferred in calls involving the trunk. By default, the system is configured so that double reInvites are
preferred, and all trunk accounts prefer a double reInvite. Double reInvites are used, for example, when a
SIP trunk in local transfer mode is providing ring-back during a blind transfer. In this scenario, a double
reInvite must occur in order to establish a talk path after the transfer target answers.
Usage Examples
The following example specifies that SIP double reInvites with SDP are preferred on this trunk:
(config)#voice trunk t01 type sip
(config-t01)#no prefer reinvite-without-sdp
60000CRG0-35E
ip sip prefer double-reinvite on page 1127
Command was introduced.
Copyright © 2012 ADTRAN, Inc.
Voice SIP Trunk Command Set
to specify the global
prefer double-reinvite on
3583