User's Manual 1000 Document #: LTRT-27045
Mediant 1000B Gateway & E-SBC
Parameter Description
[SIPSDPSessionOwner]
For example:
o=AudiocodesGW 1145023829 1145023705 IN IP4
configure voip > sip-
definition settings > sdp-ver-
nego
[EnableSDPVersionNegotiat
ion]
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.
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 = (Default) The device negotiates any new SDP re-
regardless of the origin field.
 [1] Enable = The device negotiates only an SDP re-offer with an
incremented origin field.
Subject
configure voip > sip-
definition settings > usr-def-
subject
[SIPSubject]
Defines the Subject header value in outgoing INVITE messages. If not
specified, the Subject header isn't included (default).
The maximum length is up to 50 characters.
configure voip > sip-
definition settings > coder-
priority-nego
[CoderPriorityNegotiation]
Defines the priority for coder negotiation in the incoming SDP offer,
between the device's or remote UA's coder list.
 [0] = (Default) Coder negotiation is given higher priority to the
remote UA's list of supported coders.
 [1] = Coder negotiation is given higher priority to the device's (local)
supported coders list.
Note: The parameter is applicable only to the Gateway application.
Send All Coders on Retrieve
configure voip > gateway
dtmf-supp-service supp-
service-settings > send-all-
cdrs-on-rtrv
[SendAllCodersOnRetrieve]
Enables coder re-negotiation in the sent re-INVITE for retrieving an on-
hold call.
 [0] Disable = (Default) Sends only the initially chosen coder when
the call was first established and then put on-hold.
 [1] Enable = Includes all supported coders in the SDP of the re-
INVITE sent to the call made un-hold (retrieved). The used coder is
therefore, re-negotiated.
The parameter is useful in the following call scenario example:
1 Party A calls party B and coder G.711 is chosen.
2 Party B is put on-hold while Party A blind transfers Party B to Party
C.
3 Party C answers and Party B is made un-
hold. However, as Party C
supports only G.729 coder, re-negotiation of the supported coder is
required.
Note: The parameter is applicable only to the Gateway application.
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