Medias Mediatrix 1204, Reference Manual

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Interop Parameters Reference Manual (SIP Version)
Mediatrix 1204 229
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To set Replaces configuration:
1. In the sipInteropMIB , set the Replaces configuration in the sipInteropReplacesConfig variable.
You have the following choices:
Replaces Version
You can select the version of the ietf-sip-replaces draft to which the Mediatrix 1204 must conform. The
provisioned version affects the way blind transfers are executed.
This feature is currently located under the mediatrixExperimental branch of the MIB structure. See “MIB
Structure” on page 111 for more details.
The Mediatrix 1204 supports the following versions:
Table 142: Replaces Configuration
Configuration Description
doNotUseReplaces The Replaces header is not used.
useReplacesWithRequire The Replaces header is used. It can be seen in the Refer-To header
of the REFER request sent by the transferor. It can also be seen in
the INVITE sent by the transferee. The target that supports
Replaces uses its information to merge the new INVITE with an
existing call specified in the Replaces header.
The transferee requires to use the replaces extension for proper
completion of the transfer. If the target of the transfer does not
support the replaces extension, the Mediatrix 1204 retries the
transfer using replaces by reversing the roles of the target and the
transferee (by resending the REFER to the initial target instead of
the initial transferee). As a last resort (if none of the participants
supports replaces), the transfer is carried out without using the
replaces extension.
useReplacesNoRequire The Replaces header is used. It can be seen in the Refer-To header
of the REFER request sent by the transferor. It can also be seen in
the INVITE sent by the transferee. The target that supports
Replaces uses its information to merge the new INVITE with an
existing call specified in the
Replaces header.
This disables the transfer fallback. The replaces information is still
present, but no check is made that it is effectively used to complete
the transfer.
Standards Supported • sip-replaces-01 draft
• sip-replaces-03 draft
Table 143: Replaces Versions Supported
Version Description
replaces01 The Transferor can use a REFER with Replaces when proceeding to initiate a blind transfer.
This results in the Transferee including a Replaces header in its INVITE to the Transfer
Target.
replaces03 When initiating a blind transfer, the Transferor first CANCELs its call with the Target and then
issues a REFER without Replaces to the Transferee.
Note : A side effect is that the Mediatrix 1204 will release the line, then take it again. Note that
the Mediatrix 1204 might not use the same line as before. This is a design flaw in the SIP
transfer method, which is currently in the known issues of the SIPPING workgroup.