AudioCodes Mediant 4000 SBC User Manual page 444

Parameter
Fax Rerouting Mode
sbc-fax-rerouting-
mode
[IpProfile_SBCFaxRerouting
Mode]
Media
Broken Connection Mode
disconnect-on-broken-
connection
[IpProfile_DisconnectOnBrok
enConnection]
User's Manual
(answering) fax, and does not support renegotiation if it is the
originating fax.

[2] No = The SIP entity does not support fax re-negotiation upon
fax detection when it is the originating or terminating fax.
Note:

This feature is applicable only when both SIP entities do not fully
support fax detection (receive or send) and negotiation: one SIP
entity must be assigned an IP Profile where the parameter is set to
[1] or [2], while the peer SIP entity must be assigned an IP Profile
where the parameter is set to [2].

This feature is supported only if at least one of the SIP entities use
the G.711 coder.

This feature utilizes DSP resources. If there are insufficient
resources, the fax transaction fails.
Enables the rerouting of incoming SBC calls that are identified as fax
calls to a new IP destination.

[0] Disable (default)

[1] Rerouting without delay
For more information, see Configuring Rerouting of Calls to Fax
Destinations on page 511.
Note: Configure the parameter for the IP leg that is interfacing with the
fax termination.
Defines the device's handling of calls when RTP packets (media) are
not received within a user-defined timeout interval (configured by the
BrokenConnectionEventTimeout parameter). The interval can be
during call setup (configured by the NoRTPDetectionTimeout
parameter) or mid-call when RTP flow suddenly stops (configured by
the BrokenConnectionEventTimeout parameter).

[0] Ignore = The call is maintained despite no media and is
released when signaling ends the call (i.e., SIP BYE).

[1] Disconnect = (Default) The device ends the call.

[2] Reroute = The device ends the call and searches the IP-to-IP
Routing table for a matching rule and if found, generates a new
INVITE to the corresponding destination (i.e., alternative routing).
You can configure a routing rule whose matching characteristics is
explicitly for calls with broken RTP connections. This is done using
the Call Trigger parameter, as described in Configuring SBC IP-to-
IP Routing Rules on page 499.
Note:

The device can only detect a broken RTP connection if silence
compression is disabled for the RTP session.

If during a call the source IP address (from where the RTP packets
are received by the device) is changed without notifying the device,
the device rejects these RTP packets. To overcome this, configure
the DisconnectOnBrokenConnection parameter to 0. By this
configuration, the device doesn't detect RTP packets arriving from
the original source IP address and switches (after 300 msec) to the
RTP packets arriving from the new source IP address.

The corresponding global parameter is
DisconnectOnBrokenConnection.
444
Mediant 4000 SBC
Description
Document #: LTRT-40203