AudioCodes Mediant 500L User Manual page 462

Parameter
sbc-fax-rerouting-mode
[IpProfile_SBCFaxRerouting
Mode]
Media
Broken Connection Mode
disconnect-on-broken-
connection
[IpProfile_DisconnectOnBrok
enConnection]
Media IP Version Preference
media-ip-version-preference
[IpProfile_MediaIPVersionPr
eference]
User's Manual
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 697.
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 (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 = (SBC application only) 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 685.
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.
Defines the preferred RTP media IP addressing version for outgoing
SIP calls (according to RFC 4091 and RFC 4092). The RFCs concern
Alternative Network Address Types (ANAT) semantics in the SDP to
offer groups of network addresses (IPv4 and IPv6) and the IP address
version preference to establish the media stream. The IP address is
indicated in the "c=" field (Connection) of the SDP.

[0] Only IPv4 = (Default) SDP offer includes only IPv4 media IP
addresses.

[1] Only IPv6 = SDP offer includes only IPv6 media IP addresses.

[2] Prefer IPv4 = SDP offer includes IPv4 and IPv6 media IP
addresses, but the first (preferred) media is IPv4.

[3] Prefer IPv6 = SDP offer includes IPv4 and IPv6 media IP
addresses, but the first (preferred) media is IPv6.
To indicate ANAT support, the device uses the SIP Allow header or to
enforce ANAT it uses the Require header:
462
Mediant 500L Gateway & E-SBC
Description
Document #: LTRT-10532