Media5 Mediatrix 4104, Reference Manual, Page: 297 / 466

Interop Parameters Reference Manual (SIP Version)
Mediatrix 4104 275

To define the local ring behaviour on provisional response:
1. In the sipInteropMIB , set the sipInteropLocalRingOnProvisionalResponse variable to the proper
value.
SIP Credential
You can configure how the Mediatrix 4104 reuses the credential in different transactions of the same call or
registration. For instance, it may be required that a new SIP request does not reuse the credential negotiated
in the previous transaction of the same call or registration. For example, a re-INVITE will not reuse the
credential of the INVITE but will be challenged.

To set the Mediatrix 4104 not to reuse the SIP credential:
1. In the sipInteropMIB , set the sipInteropReuseCredentialEnable variable to disable .
If you set this variable to enable (which is the default value), the Mediatrix 4104 reuses the
credential negotiated in previous transactions.
Branch Parameter Settings
The following are settings related to the Branch parameter.
Branch Matching Method
You can configure the method used to match incoming SIP packets with a branch. A branch could be
described as a link that allows to match a response to a request.

To configure the branch matching method:
1. In the sipInteropMIB , set the sipInteropBranchMatchingMethod variable with the proper method to
use.
Figure 86: Local Ring Behaviour
Parameter Description
disable The local ring is not started on a “18x Provisional” response without SDP,
except for a “180 Ringing” message. This is the default value.
The 180 Ringing message is a provisional or informational response used
to indicate that the INVITE message has been received by the user agent
and that alerting is taking place.
Note : Using this default value means you are implementing a behaviour
that is different from previous versions of the Mediatrix 4104 application.
enable The local ring is started on any “18x Provisional” response without SDP.
Standards Supported • RFC 2543 – SIP: Session Initiation Protocol, section 10.1.2
• RFC 3261 – SIP: Session Initiation Protocol, section 8.1.1.7
Table 175: Branch Matching Method
Method Description
rfc2543 Follows the method described in RFC 2543 (section 10.1.2). Responses are
mapped to requests by the matching
To , From , Call-ID , and CSeq headers and
the branch parameter of the first Via header.