Media5 Mediatrix 4104, Reference Manual

Page: 295 / 466

Interop Parameters Reference Manual (SIP Version)
Mediatrix 4104 273
When Putting a Call on Hold
The Mediatrix 4104 can provide the direction attribute and the meaning of the connection address “0.0.0.0”
sent in the SDP when putting an endpoint on hold.
This configuration has no effect if the sipInteropSdpDirectionAttributeEnable variable is set to Disable (see
“Direction Attribute” on page 272 for more details).
See “Call Hold” on page 304 for more details on holding calls.

To define the direction attribute when putting a call on hold:
1. In the sipInteropMIB , set the sipInteropOnHoldSdpStreamDirection variable to the proper value.
Answering a Hold Offer with the Direction Attribute “sendonly”
You can define how to set the direction attribute and the connection address in the SDP when answering a
hold offer with the direction attribute “sendonly”.
enable The Mediatrix 4104 always sends the direction attribute in the
SDP of the initial INVITE.
The initial handshake determines whether or not the peer
supports the direction attribute.
• If the direction attribute is present in the SDP
received from the peer, the Mediatrix 4104 sends
the direction attribute in the SDP for the remainder
of the session.
• If the direction attribute is not present in the SDP
received from the peer, the Mediatrix 4104 does not
send the direction attribute in the SDP for the
remainder of the session.
If present in the SDP, the direction attribute is preferred over
the connection address to transmit session modification
information.
This method is in conformance with RFC 3264.
Standards Supported RFC 3264 – An Offer/Answer Model with Session Description Protocol
(SDP)
Table 172: SDP Direction Attribute (Continued)
Parameter Description
Table 173: Direction Attributes
Parameter Description
inactive The stream is put on hold by marking it as inactive . This is the default
value. This setting should be used for backward compatibility issues.
sendonly The stream is put on hold by marking it as sendonly .
This method allows the Mediatrix 4104 to be in conformance with
RFC 3264.
Standards Supported RFC 3264 – An Offer/Answer Model with Session Description Protocol
(SDP)