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Configuring the PSTN (FXO) Gateway on the SPA3102
Call Scenarios
ATA Administration Guide 109
6
Call Forwarding to PSTN Gateway
This section describes a number of scenarios that forward calls to the PSTN
gateway. It includes the following topics:
• ”Forward-On-No-Answer to the PSTN Gateway” section on page109
• ”Forward-All to the PSTN gateway” section on page109
• ”Forward to a Particular PSTN Number” section on page110
• ”Forward-On-Busy to PSTN Gateway or Number” section on page110
Forward-On-No-Answer to the PSTN Gateway
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.
NOTE 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.
Forward-All to the PSTN gateway
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.