Parameter Description
Web: Max Allowed Delay for Alt
Routing [msec]
[IPConnQoSMaxAllowedDelay]
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 value is 250.
43.10.12 Alternative Routing Parameters
The alternative routing parameters are described in the table below.
Table 43-58: 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.
ï‚§ [1] Routing Table = (Default) Internal routing table is used to
locate a redundant route.
ï‚§ [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).
ï‚§ [0] = Disable (default)
ï‚§ [1] = Enable
Web/EMS: Alternative
Routing Tone Duration [ms]
[AltRoutingToneDuration]
Defines the duration (in milliseconds) for which the device plays a
tone to the endpoint on each attempt for Tel-to-IP alternative routing.
When the device finishes playing the tone, a new SIP INVITE
message is sent to the new IP destination. The tone played is the call
forward tone (Tone Type #25 in the CPT file).
The valid range is 0 to 20,000. The default is 0 (i.e., no tone is
played).
Note: This parameter is applicable only to Tel-to-IP alternative
routing.
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