CHAPTER60 Configuration Parameters Reference
Mediant 4000 SBC | User's Manual
Parameter Description
If the remote server doesn’t support GRUU, it ignores the
parameters of the GRUU. Otherwise, if the remote side also
supports GRUU, the REGISTER responses contain the “gruu”
parameter in each Contact header. The parameter contains a SIP or
SIPS URI that represents a GRUU corresponding to the UA
instance that registered the contact. The server provides the same
GRUU for the same AOR and instance-id when sending REGISTER
again after registration expiration. RFC 5627 specifies that the
remote target is a GRUU target if its’ Contact URL has the "gr"
parameter with or without a value.
■ Using GRUU: The UA can place the GRUU in any header field
that can contain a URI. It must use the GRUU in the following
messages: INVITE request, its 2xx response, SUBSCRIBE
request, its 2xx response, NOTIFY request, REFER request and
its 2xx response.
'User-Agent
Information'
configure voip >
sip-definition
settings > user-
agent-info
[UserAgentDisplayInf
o]
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/7.20A.252.011
If not configured, the default string, "<product-name>/<<software
version>>" is used, for example:
User-Agent: AudioCodes-Sip-Gateway/<swver>
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).
'SDP Session Owner'
configure voip >
sip-definition
settings > sdp-
session-owner
[SIPSDPSessionOwn
er]
Defines 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 is
"AudioCodesGW".
For example:
o=AudioCodesGW 1145023829 1145023705 IN IP4
10.33.4.126
Note: The parameter is applicable only when the device creates a
new SIP message (and SDP) such as when the device plays a
ringback tone. The parameter is not applicable to SIP messages that
the device receives from one end and sends to another (i.e., does
not modify the SDP's 'o' field).
configure voip >
sip-definition
settings > sdp-
ver-nego
[EnableSDPVersionN
egotiation]
Enables the device to ignore new SDP re-offers (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.
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