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:
Pre-Configured IP-to-IP Routing Rule for Auto Answer to Registrations Mode
| Mode | Index | Source IP Group | Request Type | Destination Type | Destination IP Group | Destination Address | Alternative Route Options | 
|---|---|---|---|---|---|---|---|
| Auto Answer to Registrations 
 
 
 
 
 
 
 
 | 1 | Any | OPTIONS | Dest Address | - | Internal | Route Row | 
| 2 | Any | REGISTER | IP Group | Any | - | Route Row | |
| 3 | #1 [CRP Users] | All | IP Group | #2 [CRP Proxy] | - | Route Row | |
| 4 | #1 [CRP Users] | All | IP Group | #1 [CRP Users] | - | Alternative Route Ignore Inputs | |
| 5 | #1 [CRP Users] | All | IP Group | #3 [CRP Gateway] | - | Alternative Route Ignore Inputs | |
| 6 | #2 [CRP Proxy] | All | IP Group | #1 [CRP Users] | - | Route Row | |
| 7* | #2 [CRP Proxy] | All | IP Group | #3 [CRP Gateway] | - | Route Row | |
| 8 | #3 [CRP Gateway] | All | IP Group | #2 [CRP Proxy] | - | Route Row | |
| 9 | #3 [CRP Gateway] | All | IP Group | #1 [CRP Users] | - | Alternative Route Ignore Inputs | 
| ● | The destination for the routing rule at Index 2 is the source IP Group (i.e., from where the REGISTER message is received). | 
| ● | Routing rule at Index 7 appears only if the CRPGatewayFallback parameter is enabled (see Configuring PSTN Fallback). |