Alternative Routing Upon Isdn Disconnect; Alternative Routing From Fxo To Ip - AudioCodes Mediant 1000B User Manual

Parameter
est_TrunkGroupId]
Forward Destination
forward-dst
[ForwardOnBusyTrunkD
est_ForwardDestination]

24.7.3 Alternative Routing upon ISDN Disconnect

You can configure when the device sends a call to an alternative route if it receives an
ISDN Q.931 Disconnect message with a Progress Indicator (PI) IE from the Tel side for IP-
to-Tel calls. The Disconnect message indicates that the call cannot be established due to,
for example, a busy state on the Tel side. Using the DisconnectCallwithPIifAlt ini file
parameter, you can configure the following modes of operation:

The device does not immediately disconnect the call. Instead, it waits for any
subsequent media from the Tel side (e.g., "this number is currently busy") and
forwards it to the IP side (SIP 183 for early media). Only when it receives a Q.931
Release message, does the device disconnect the call (sends a SIP BYE message to
the IP side). If you have configured an alternative route, the device sends the IP call to
the alternative route.

The device immediately sends the IP call to an alternative route, if you have
configured one. If no alternative route has been configured and the Disconnect
message is received with PI, the device forwards the subsequent early media to the IP
side. The device disconnects the IP call only upon receipt of the subsequent Release
message.

24.7.4 Alternative Routing from FXO to IP

You can enable the device to automatically switch the destination of an FXS call from the
FXO (PSTN) to the IP (SIP Trunk) when the PSTN disconnects the FXS subscriber. When
a PSTN disconnects a subscriber, the device automatically (or manually through TR-104),
recognizes the signal of the call placed by the subscriber and then re-routes the call to a
SIP Trunk. This is configured using the ini file parameter, TR104FXOSwitchover.
Note: For more information on this application, please contact your AudioCodes
sales representative.
User's Manual
Defines the alternative IP destination for the call used if the Trunk Group
is busy or unavailable.
The valid value can be an IP address in dotted-decimal notation, an
FQDN, or a SIP Request-URI user name and host part (i.e.,
user@host). The following syntax can also be used:
host:port;transport=xxx (i.e., IP address, port and transport type).
Note:
•
If you do not specify a port, the device uses UDP port 5060.
•
When configured with a user@host, the original destination number
is replaced by the user part.
510
Mediant 1000B Gateway and E- SBC
Description
Document #: LTRT-27044