User's Manual 994 Document #: LTRT-10466
Mediant 500L MSBR
Parameter Description
Web: Max Allowed Delay for Alt
Routing [msec]
CLI: mx-all-dly-4-alt-rte
[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 is 250.
67.10.14 Alternative Routing Parameters
The alternative routing parameters are described in the table below.
Table 67-68: Alternative Routing Parameters
Parameter Description
Web: 3xx Use Alt Route
Reasons
CLI: configure voip/sip-
definition advanced-
settings/3xx-use-alt-route
[UseAltRouteReasonsFor3xx]
Defines the handling of received SIP 3xx responses regarding call
redirection to listed contacts in the Contact header.
 [0] No = (Default) Upon receipt of a 3xx response, the device
tries each contact, one by one, listed in the Contact headers,
until a successful destination is found. However, if a contact
responds with a 486 or 600, the device does not try to redirect
the call to next contact, and drops the call.
 [1] No if 6xx = Upon receipt of a 3xx response, the device tries
each contact, one by one, listed in the Contact headers.
However, if a 6xx Global Failure response is received during this
process (e.g., 600 Busy Everywhere) the device does not try to
redirect the call to the next contact, and drops the call.
 [2] Yes = Upon receipt of a 3xx response, the device redirects
the call to the first contact listed in the Contact header. If the
contact responds with a SIP response that is defined in the
Reasons for Tel-to-IP Alternative Routing table, the device tries
to redirect the call to the next contact, and so on. If a contact
responds with a response that is not configured in the table, the
device does not try to redirect the call to the next contact, and
drops the call.
Web/EMS: Redundant Routing
Mode
CLI: redundant-routing-m
[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).
[DisconnectCallwithPIifAlt] Defines when the device sends the IP-to-Tel call to an alternative
route (if configured) when it receives an ISDN Q.931 Disconnect
message from the Tel side.
 [0] (Default) = The device forwards early media to the IP side if
Disconnect includes PI, and disconnects the call when a
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