Version 6.4 749 March 2012
SIP User's Manual A. Configuration Parameters Reference
Parameter Description
For configuring ini file table parameters, see 'Configuring ini
File Table Parameters' on page 84
Reasons for Alternative IP-to-Tel Routing Table
Web: Reasons for Alternative IP-to-
Tel Routing
EMS: Alt Route Cause IP to Tel
[AltRouteCauseIP2Tel]
This parameter table configures call failure reason values
received from the PSTN side (in Q.931 presentation). If a call is
released as a result of one of these reasons, the device
attempts to locate an alternative Trunk Group for the call in the
Inbound IP Routing Table'.
The format of this parameter is as follows:
[AltRouteCauseIP2Tel]
FORMAT AltRouteCauseIP2Tel_Index =
AltRouteCauseIP2Tel_ReleaseCause;
[\AltRouteCauseIP2Tel]
For example:
AltRouteCauseIP2Tel 0 = 3 (No Route to Destination)
AltRouteCauseIP2Tel 1 = 1 (Unallocated Number)
AltRouteCauseIP2Tel 2 = 17 (Busy Here)
AltRouteCauseIP2Tel 2 = 27 (Destination Out of Order)
Notes:
This parameter can include up to 5 indices.
If the device fails to establish a call to the PSTN because it
has no available channels in a specific Trunk Group (e.g., all
the channels are occupied, or the spans are disconnected or
out-of-sync), it uses the Internal Release Cause '3' (No
Route to Destination). This cause can be used in the
AltRouteCauseIP2Tel table to define routing to an
alternative Trunk Group.
This table can be used for example, in scenarios where the
destination is busy and the Release Reason #17 is issued or
for other call releases that issue the default Release Reason
(#3).
The device also plays a tone to the endpoint whenever an
alternative route is used. This tone is played for a user-
defined time (configured by the parameter
AltRoutingToneDuration).
For configuring ini file table parameters, see 'Configuring ini
File Table Parameters' on page 84.
Forward On Busy Trunk Destination Table
Web/EMS: Forward On Busy Trunk
Destination
[ForwardOnBusyTrunkDest]
This parameter table configures the Forward On Busy Trunk
Destination table. This table allows you to define an alternative
IP destination if a trunk is busy, for IP-to-Tel calls. The
destination can be an IP address or a SIP Request-URI user
name and host part (i.e., user@host).
The format of this parameter is as follows:
[ForwardOnBusyTrunkDest]
FORMAT ForwardOnBusyTrunkDest_Index =
ForwardOnBusyTrunkDest_TrunkGroupId,
ForwardOnBusyTrunkDest_ForwardDestination;
[\ForwardOnBusyTrunkDest]
For example, the below configuration forwards IP-to-Tel calls to
destination user “112” at host IP address 10.13.4.12, port 5060,
using transport protocol TCP, if Trunk Group ID 2 is
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