User's Manual 1234 Document #: LTRT-10532
Mediant 500L Gateway & E-SBC
Parameter Description
forwarded to the INVITE-initiating UA and subsequent 18x
responses are discarded.
Gateway Direct Route Prefix
configure voip > sbc settings > gw-
direct-route-prefix
[GWDirectRoutePrefix]
Defines the prefix destination Request-URI user part that is
appended to the original user part for alternative IP-to-IP call
routing from SBC to Gateway (Tel) interfaces.
The valid value is a string of up to 16 characters. The default is
"acgateway-<original prefix destination number>". For
example, "acgateway-200".
For more information, see Configuring SBC IP-to-IP Routing
Rules on page 685.
[SBCRemoveSIPSFromNonSecure
dTransport]
configure voip > sbc
settings > sbc-remove-
sips-non-sec-transp
Defines the SIP headers for which the device replaces “sips:”
with “sip:” in the outgoing SIP-initiating dialog request (e.g.,
INVITE) when the destination transport type is unsecured (e.g.,
UDP). (The “sips:” URI scheme indicates secured transport, for
example, TLS.)
[0] = (Default) The device replaces “sips:” with “sip:” for the
Request-URI and Contact headers only (and retains “sips:”
for all other headers).
[1] = The device replaces “sips:” with “sip:” for the Request-
URI, Contact, From, To, P-Asserted, P-Preferred, and
Route headers.
configure voip > sbc settings > sbc-
media-sync
[EnableSBCMediaSync]
Enables synchronization of media between two SIP user
agents when a call is established between them. Media
synchronization means that the media is properly negotiated
(SDP offer/answer) between the user agents. In some
scenarios, the call is established despite the media not being
synchronized. This may occur, for example, in call transfer
(SIP REFER) where the media between the transfer target and
transferee are not synchronized. The device performs media
synchronization by sending a re-INVITE immediately after the
call is established in order for the user agents to negotiate the
media (SDP offer/answer).
[0] Disable = (Default) Media synchronization is performed
only if the RTP mode (e.g., a=sendrecv, a=sendrecv,
a=sendonly, a=recvonly, and a=inactive) between the user
agents are different and synchronization is required.
[1] Enable = Media synchronization is performed if the
media, including RTP mode or any other media such as
coders, is different and has not been negotiated between
the user agents.
[2] Never = Media synchronization is never performed.
Admission Control Table
Admission Control
configure voip > sbc sbc-
admission-control
[SBCAdmissionControl]
Defines Call Admission Control (CAC) rules.
The format of the ini file table parameter is as follows:
[SBCAdmissionControl]
FORMAT SBCAdmissionControl_Index =
SBCAdmissionControl_AdmissionControlName,
SBCAdmissionControl_LimitType,
SBCAdmissionControl_IPGroupName,
SBCAdmissionControl_SRDName,
SBCAdmissionControl_SIPInterfaceName,
SBCAdmissionControl_RequestType,
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