AudioCodes Mediant 4000 SBC User Manual page 463

CHAPTER 19 Coders and Profiles
Parameter
'Broken Connection Mode'
disconnect-on-broken-
connection
[IpProfile_
DisconnectOnBrokenConnectio
n]
'Media IP Version Preference'
media-ip-version-
preference
[IpProfile_
MediaIPVersionPreference]
Description
Defines the device's handling of calls when RTP packets
(media) are not received within a user-defined timeout. The
timeout 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
when the timeout expires.
■ [2] Reroute = The device ends the call and then
searches the IP-to-IP Routing table for a matching rule.
If found, the device 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
Routing Rules.
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.
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Mediant 4000 SBC | User's Manual
Configuring SBC IP-to-IP