User's Manual 1220 Document #: LTRT-27055
Mediant 1000B Gateway & E-SBC
65.10.14 Alternative Routing Parameters
The alternative routing parameters are described in the table below.
Table 65-69: Alternative Routing Parameters
Parameter Description
3xx Use Alt Route Reasons
configure voip > sip-definition
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.
Redundant Routing Mode
configure voip > sip-definition
settings > 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).
Disconnect Call With PI If Alt
[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] Disable = (Default) The device forwards early media to the IP
side if Disconnect includes PI, and disconnects the call when a
Release message is received. Only after the call is disconnected
does the device send the call to an alternative route.
[1] Enable = The device immediately sends the call to the
alternative route.
For more information, see Alternative Routing upon ISDN Disconnect
on page 538.
Note: The parameter is applicable only to digital interfaces.
configure voip > gateway
manipulation settings > alt-
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
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