ADTRAN AOS Version R10.1.0 Command Reference Manual page 3582

Command Reference Guide
prefer double-reinvite
Use the prefer double-reinvite command to specify that Session Initiation Protocol (SIP) double reInvite
messages are included in calls involving the trunk. Calls that typically require a double reInvite are
forwarded calls from call overage and any attended transfer, and when these calls connect, a double
reInvite message is initiated when the feature is enabled. Using the no form of this command indicates that
double reInvites are not preferred on the trunk. Use the command
1127 to specify the global setting for this feature. Variations of this command include:
prefer double-reinvite
prefer double-reinvite system
This command should only be issued by advanced users or at the direction of ADTRAN
technical support.
Syntax Description
system
Default Values
By default, all trunk accounts prefer a double re-Invite.
Command History
Release A5.01
Functional Notes
The prefer double-reinvite 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.
You can also specify whether Session Description Protocol (SDP) is used in the double reInvite message.
To send a double reInvite without SDP, refer to the command
This command helps determine which endpoint receives SDP in the double reInvite call flow.
Usage Examples
The following example specifies that SIP double reInvites are not preferred on this trunk:
(config)#voice trunk t01 type sip
(config-t01)#no prefer double-reinvite
60000CRG0-35E
Optional. Specifies that the system double reInvite setting is used. The
system setting is specified using the command
page 3582.
Command was introduced.
Copyright © 2012 ADTRAN, Inc.
Voice SIP Trunk Command Set
ip sip prefer double-reinvite on page
prefer double-reinvite on
prefer reinvite-without-sdp on page 3583.
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