Version 6.2 391 February 2011
SIP User's Manual 10. Configuration Parameters Reference
Parameter Description
Web: User-Agent
Information
EMS: User Agent Display
Info
[UserAgentDisplayInfo]
Defines the string that is used in the SIP User-Agent and Server
response headers. When configured, the string '<UserAgentDisplayInfo
value>/software version' is used, for example:
User-Agent: myproduct/v.6.00.010.006
If not configured, the default string, '<AudioCodes product-
name>/software version' is used, for example:
User-Agent: Audiocodes-Sip-Gateway-
MediaPack/v.6.00.010.006
The maximum string length is 50 characters.
Note: The software version number and preceding forward slash (/)
cannot be modified. Therefore, it is recommended not to include a
forward slash in the parameter's value (to avoid two forward slashes in
the SIP header, which may cause problems).
Web/EMS: SDP Session
Owner
[SIPSDPSessionOwner]
Determines the value of the Owner line ('o' field) in outgoing SDP
messages.
The valid range is a string of up to 39 characters. The default value is
'AudiocodesGW'.
For example:
o=AudiocodesGW 1145023829 1145023705 IN IP4
10.33.4.126
[EnableSDPVersionNego
tiation]
This feature enables the flexibility of ignoring a new SDP re-offer (from
the media negotiation perspective) in certain scenarios (such as session
expires). According to RFC 3264, once an SDP session is established,
a new SDP offer is considered a new offer only when the SDP origin
value is incremented. In scenarios such as session expires, SDP
negotiation is irrelevant and thus, the origin field is not changed.
Even though some SIP devices don’t follow this behavior and don’t
increment the origin value even in scenarios where they want to re-
negotiate, the device can assume that the remote party operates
according to RFC 3264, and in cases where the origin field is not
incremented, the device does not re-negotiate SDP capabilities.
[0] Disable = The device negotiates any new SDP re-offer,
regardless of the origin field (default).
[1] Enable = The device negotiates only an SDP re-offer with an
incremented origin field.
Web/EMS: Subject
[SIPSubject]
Defines the value of the Subject header in outgoing INVITE messages.
If not specified, the Subject header isn't included (default).
The maximum length is up to 50 characters.
Web: Multiple
Packetization Time Format
EMS: Multi Ptime Format
[MultiPtimeFormat]
Determines whether the 'mptime' attribute is included in the outgoing
SDP.
[0] None = Disabled (default)
[1] PacketCable = includes the 'mptime' attribute in the outgoing
SDP - PacketCable-defined format
The 'mptime' attribute enables the device to define a separate
Packetization period for each negotiated coder in the SDP. The 'mptime'
attribute is only included if this parameter is enabled, even if the remote
side includes it in the SDP offer. Upon receipt, each coder receives its
'ptime' value in the following precedence: from 'mptime' attribute, from
'ptime' attribute, and then from default value.
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