3Com VCX V7122 User Manual page 126

ini File Field Name
*
Web Parameter Name
AltRouteCauseTel2IP
[Reasons for Alternative
Routing Table]
AltRouteCauseIP2Tel
[Reasons for Alternative
Routing Table]
FilterCalls2IP
[Filter Calls To IP]
Alternative Routing Parameters
AltRoutingTel2IPEnable
[Enable Alt Routing Tel to IP]
AltRoutingTel2IPMode
[Alt Routing Tel to IP Mode]
126
Valid Range and Description
Table of call failure reason values received from the IP side. If a call is released as a
result of one of these reasons, the gateway tries to find an alternative route to that
call in the 'Tel to IP Routing' table.
For example:
AltRouteCauseTel2IP = 486
AltRouteCauseTel2IP = 480 (Temporarily unavailable).
AltRouteCauseTel2IP = 408
Note 1: The 408 reason can be used to specify that there was no response from the
remote party to the INVITE request.
Note 2: This parameter can appear up to 5 times.
Table of 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 gateway
tries to find an alternative trunk group to that call in the 'IP to Trunk Group Routing'
table.
For example:
AltRouteCauseIP2Tel = 3
AltRouteCauseIP2Tel = 1
AltRouteCauseIP2Tel = 17
Note 1: This parameter can appear up to 5 times.
Note 2: If the VCX V7122 fails to establish a cal to the PSTN because it has no
available channels in a specific trunk group (e.g., all of the trunk group's channels are
occupied, or the trunk group's 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.
0 = Disabled (default).
1 = Enabled.
If the filter calls to IP feature is enabled, then when a Proxy is used, the gateway first
checks the Tel IP routing table before making a call through the Proxy. If the
number is not allowed (number isn't listed or a Call Restriction routing rule,
IP=0.0.0.0, is applied), the call is released.
Operation modes of the Alternative Routing mechanism:
0 = Disabled (default).
1 = Enabled.
2 = Enabled for status only, not for routing decisions.
0 (None) = Alternative routing is not used.
1 (Conn) = Alternative routing is performed if ping to initial destination failed.
2 (QoS) = Alternative routing is performed if poor quality of service was detected.
3 (All) = Alternative routing is performed if, either ping to initial destination failed, or
poor quality of service was detected, or DNS host name is not resolved (default).
Note: QoS is quantified according to delay and packet loss, calculated according to
previous calls.
For information on the Alternative Routing feature,see
Alternative Routing (based on Connectivity and QoS)
3Com VCX V7122 SIP VoIP Gateway User Manual
(Busy here).
(No response).
(No route to destination).
(Unallocated number).
(Busy here).
Configuring the Gateway's
on page 150.