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Version 5.8
263
September 2009
SIP User's Manual
6. Configuration Parameters Reference
Parameter
Description
Determines whether the device uses the value of the
incoming SIP Reason header for Release Reason
mapping.
[HandleReasonHeader]
[0]
Disregard Reason header in incoming SIP
messages.
[1]
Use the Reason header value for Release Reason
mapping (default).
Determines the device's behavior upon receipt of SIP Re-
INVITE messages that include the silencesupp:off attribute.
[EnableSilenceSuppInSDP]
[0]
= Disregard the silecesupp attribute (default).
[1]
= Handle incoming Re-INVITE messages that
include the silencesupp:off attribute in the SDP as a
request to switch to the Voice-Band-Data (VBD) mode.
In addition, the device includes “a=silencesupp:off” in its
SDP offer.
Enables / disables the usage of the 'rport' parameter in the
Via header.
[EnableRport]
[0]
= Enabled.
[1]
The device adds an 'rport' parameter to the Via header of
each outgoing SIP message. The first Proxy that receives
this message sets the 'rport' value of the response to the
actual port from which the request was received. This
method is used, for example, to enable the device to
identify its port mapping outside a NAT.
If the Via doesn't include 'rport' tag, the destination port of
the response is taken from the host part of the Via header.
If the Via includes 'rport' tag without a port value, the
destination port of the response is the source port of the
incoming request.
If the Via includes 'rport' tag with a port value (rport=1001),
the destination port of the response is the port indicated in
the 'rport' tag.
= Disabled (default).
EMS: X Channel Header
Determines whether the x-channel SIP header is added to
SIP messages for providing information on the physical
channel on which the call is received or placed.
[XChannelHeader]
[0]
Disable = SIP x-channel header is not used (default).
[1]
Enable = SIP x-channel header is generated by the
device and sent in INVITE messages and 180, 183, and
200 OK SIP responses. The header includes the
channel, and the device's IP address.
For example, 'x-channel: DS/DS1-1
'DS/DS-1' is a constant string
/8;IP=192.168.13.1',
where:
'1' is
'8' is the channel
a constant string
'IP=192.168.13.1' is the device's IP address
(port)
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