Medias Mediatrix 1204, Reference Manual

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Chapter 18 - SIP Protocol Features Interop Parameters
230 Mediatrix 1204
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To set the version of Replaces supported:
1. In the sipInteropMIB , set the sipInteropReplacesVersion variable with the proper version.
• replaces01
• replaces03
Transmission Timeout
If a DNS SRV answer contains more than one entry, the Mediatrix 1204 will try these entries if the entry initially
selected does not work. You can configure the maximum time, in seconds, to spend waiting for answers to
messages, from a single source. Retransmissions still follow the algorithm proposed in
RFC 2543bis , but the
total wait time can be overridden by using this feature.
For example, if you are using DNS SRV and more than one entry are present, this timeout is the time it takes
before trying the second entry.
This feature is currently located under the mediatrixExperimental branch of the MIB structure. See “MIB
Structure” on page 111 for more details.
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To set the transmission timeout:
1. In the sipInteropMIB , locate the sipInteropTransmissionTimeout variable.
2. Set the timeout value.
Available values are from 1 to 32 seconds.
Max-Forwards Header
You can configure whether the Mediatrix 1204 inserts the Max-Forwards header into sent requests, as per
RFC 3261. Max-Forwards serves to limit the number of hops a request can make on the way to its destination.
It consists of an integer that is decremented by one at each hop. If the Max-Forwards value reaches 0 before
the request reaches its destination, it will be rejected with a “483 (Too Many Hops)” error response.
This feature is currently located under the mediatrixExperimental branch of the MIB structure. See “MIB
Structure” on page 111 for more details.
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To insert the Max-Forwards header into SIP requests:
1. In the sipInteropMIB , set the sipInteropMaxForwardsValue variable to the value you want.
Any positive value means that the Max-Forwards header is inserted into sent requests. The default
value is 70 .
2. Restart the Mediatrix 1204 so that the change may take effect.
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To disable inclusion of this header in SIP requests:
1. In the sipInteropMIB , set the sipInteropMaxForwardsValue variable to -1 .
2. Restart the Mediatrix 1204 so that the change may take effect.
Standards Supported • RFC 2543bis – SIP: Session Initiation Protocol
• RFC 3261 – SIP: Session Initiation Protocol
Standards Supported RFC 3261 – SIP: Session Initiation Protocol