Cisco Systems WRP400 Manual De Usuario

Call Scenarios

ATA Administration Guide

109

This section describes a number of scenarios that forward calls to the PSTN 
gateway. It includes the following topics:

•

•

•

•

In this scenario, Line 1 is configured to 

Cfwd No Ans Dest 

to the PSTN Gateway. 

The scenario is implemented by setting User 1 to forward to gw0 on no answer, 
with 

Cfwd No Ans Delay 

set to six seconds. 

The caller calls Line 1 and if Line 1 is not picked up after six seconds, the PSTN 
Line picks up the call and the call reverts to a PSTN-Gateway call, as described 
above. In this case, HTTP authentication is not allowed because Line 1 does not 
authenticate inbound INVITE requests. If you need to authenticate the VoIP caller in 
this case, you must select the PIN authentication method, or else the caller is 

not

 

authenticated.

If the PSTN Line is busy at the moment of the forward, it does not answer the VoIP 
call. The call forward rule is ignored and Line 1 continues to ring.

In this scenario, Line 1 is configured with 

Cfwd All Dest 

parameter to the PSTN 

gateway.This scenario is the same the previous case, except the FXO picks up the 
Line 1 call immediately. 

If the PSTN Line is busy at the moment of the call, the PSTN Line does not pick up 
the call, the call forward rule is ignored, and Line 1 continues to ring.