Version 6.6 567 October 2014
Installation & Operation Manual 40. General SIP Configuration
Parameter
Name
Type
Provisio
ning
Type
Description
Max SIP
Message
Length
(KB)
Integer
1 – 50
Instant Defines the maximum length of
the SIP message (in Kbytes)
SDP
Version
Negotiation
Enum
Disable, Enable
Instant
This feature enables the flexibility
of ignoring a new SDP re-offer
(from the media negotiation
perspective) in specific scenarios
(such as session expires).
According to RFC 3264, once an
SDP session
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 now
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.
Add
Subject
Header
String
Up to 200 chars
Instant Defines the value of the Subject
header in outgoing INVITE
messages. If not specified, the
Subject header isn't included.
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