AudioCodes Mediant 800B User Manual page 284

Parameter
SIP Re-Routing Mode
CLI: re-routing-mode
[IPGroup_SIPReRoutingMod
e]
Enable Survivability
CLI: enable-survivability
[IPGroup_EnableSurvivabilit
y]
User's Manual
(see Configuring Outbound IP Routing Table on page 411).

[0] Routing Table = The device routes the call according to the
Outbound IP Routing table.

[1] Serving IP Group = The device sends the SIP INVITE to the
selected Serving IP Group. If no Serving IP Group is selected, the
default IP Group is used. If the Proxy server(s) associated with the
destination IP Group is not alive, the device uses the Outbound IP
Routing table (if the parameter IsFallbackUsed is set 1, i.e.,
fallback enabled - see ''Configuring Proxy and Registration
Parameters'' on page 301).

[2] Request-URI = The device sends the SIP INVITE to the IP
address according to the received SIP Request-URI host name.
Notes:

This parameter is applicable only to the IP-to-IP application.

This parameter is applicable only to Server-type IP Groups.
Defines the routing mode after a call redirection (i.e., a 3xx SIP
response is received) or transfer (i.e., a SIP REFER request is
received).

[-1] Not Configured (Default)

[0] Standard = INVITE messages that are generated as a result of
Transfer or Redirect are sent directly to the URI, according to the
Refer-To header in the REFER message or Contact header in the
3xx response.

[1] Proxy = Sends a new INVITE to the Proxy. This is applicable
only if a Proxy server is used and the parameter
AlwaysSendtoProxy is set to 0.

[2] Routing Table = Uses the Routing table to locate the destination
and then sends a new INVITE to this destination.
Notes:

When this parameter is set to [1] and the INVITE sent to the Proxy
fails, the device re-routes the call according to the Standard mode
[0].

When this parameter is set to [2] and the INVITE fails, the device
re-routes the call according to the Standard mode [0]. If DNS
resolution fails, the device attempts to route the call to the Proxy. If
routing to the Proxy also fails, the Redirect / Transfer request is
rejected.

When this parameter is set to [2], the XferPrefix parameter can be
used to define different routing rules for redirected calls.

This parameter is ignored if the parameter AlwaysSendToProxy is
set to 1.
Defines how the device handles registration messages and whether
Survivability mode is enabled for User-type IP Groups.

[0] Disable (default).

[1] Enable if Necessary = Survivability mode is enabled only if the
Serving IP Group is unavailable. The device saves in its
Registration database the registration messages sent by the clients
(e.g., IP phones) belonging to the User-type IP Group. If
communication with the Serving IP Group (e.g., IP-PBX) fails, the
User-type IP Group enters into Survivability mode in which the
device uses its database for routing calls between the clients of the
User-type IP Group. In Survivability mode, the RTP packets
between the clients always traverse through the device, and new
284
Mediant 800B Gateway and E-SBC
Description
Document #: LTRT-10620