Version 7.2 723 Mediant 1000B Gateway & E-SBC
User's Manual 39. CRP Configuration
Mode Index
Source IP
Group ID /
Emergency
Request
Type
Type
IP Group
ID
Address
Route
Options
Always
Emergency
1 * OPTIONS
Dest
Address
- Internal Route Row
4 1 All IP Group 1 - Route Row
5 1 All IP Group 3 - Alternative
9 3 All IP Group 1 - Route Row
39.4.3 Auto Answer to Registrations
The pre-configured IP-to-IP routing rules for the Auto Answer to Registrations CRP call
survivability mode are shown in the table below:
Table 39-4: Pre-Configured IP-to-IP Routing Rule for Auto Answer to Registrations Mode
Mode Index Source IP
Group
Request
Type
Type
IP Group
Address
Route
Options
Auto Answer
to
Registrations
1 * OPTIONS Dest
Address
- Internal Route Row
2
1
* REGISTER
IP Group -2 - Route Row
3 1 All IP Group 2 - Route Row
4 1 All IP Group 1 - Alternative
5 1 All IP Group 3 - Alternative
6 2 All IP Group 1 - Route Row
7
2
2 All IP Group 3 - Route Row
8 3 All IP Group 2 - Route Row
9 3 All IP Group 1 - Alternative
Note:
1. For the routing rule of Index 2, the destination is the source IP Group (i.e., from where
the REGISTER message was received).
2. Index 7 appears only if the CRPGatewayFallback parameter is enabled (see
''Configuring PSTN Fallback'' on page 723).
39.5 Configuring PSTN Fallback
You can enable the CRP to route emergency calls (or PSTN-intended calls) such as "911"
from the Proxy server (IP Group 2) to the PSTN (IP Group 3). In addition, for calls from the
Proxy server to Users (IP Group 1), the device searches for a matching user in its Users
Registration database and if not not located, it sends the call to the PSTN (IP Group 3), as
an alternative route.
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