Version 6.6 667 Mediant 2000
User's Manual 45. Configuration Parameters Reference
Parameter Description
Web: Max Allowed Delay
for Alt Routing [msec]
[IPConnQoSMaxAllowed
Delay]
Defines the transmission delay (in msec) at which the IP connection is
considered a failure and the Alternative Routing mechanism is
activated.
The range is 100 to 10,000. The default is 250.
45.11.12 Alternative Routing Parameters
The alternative routing parameters are described in the table below.
Alternative Routing Parameters
Parameter Description
Web/EMS: Redundant
Routing Mode
[RedundantRoutingMode
]
Determines the type of redundant routing mechanism when a call
can’t be completed using the main route.
 [0] Disable = No redundant routing is used. If the call can’t be
completed using the main route (using the active Proxy or the first
matching rule in the Routing table), the call is disconnected.
 [1] Routing Table = (Default) Internal routing table is used to
locate a redundant route.
 [2] Proxy = Proxy list is used to locate a redundant route.
Note: To implement the Redundant Routing Mode mechanism, you
first need to configure the parameter AltRouteCauseTEL2IP
(Reasons for Alternative Routing table).
[EnableAltMapTel2IP]
Enables different Tel-to-IP destination number manipulation rules per
routing rule when several (up to three) Tel-to-IP routing rules are
defined and if alternative routing using release causes is used. For
example, if an INVITE message for a Tel-to-IP call is returned with a
SIP 404 Not Found response, the call can be re-sent to a different
destination number (as defined using the parameter
NumberMapTel2IP).
 [0] = Disable (default)
 [1] = Enable
Reasons for Alternative Tel-to-IP Routing Table
Web: Reasons for
Alternative Routing
EMS: Alt Route Cause Tel
to IP
[AltRouteCauseTel2IP]
This table parameter configures SIP call failure reason values
received from the IP side. If an IP call is released as a result of one
of these reasons, the device attempts to locate an alternative IP
route for the call in the Outbound IP Routing Table (if a Proxy is not
used) or used as a redundant Proxy (you need to set the parameter
RedundantRoutingMode to 2). The release reason for Tel-to-IP calls
is provided in SIP 4xx, 5xx, and 6xx response codes.
The format of this parameter is as follows:
[AltRouteCauseTel2IP]
FORMAT AltRouteCauseTel2IP_Index =
AltRouteCauseTel2IP_ReleaseCause;
[\AltRouteCauseTel2IP]
For example:
AltRouteCauseTel2IP 0 = 486; (Busy Here)
AltRouteCauseTel2IP 1 = 480; (Temporarily Unavailable)
AltRouteCauseTel2IP 2 = 408; (No Response)
Note: For a detailed description of this table, see 'Alternative Routing
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