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4.11.4. Line 1 Forward-On-No-Answer to PSTN Gateway
Set (under User 1) to forward to “gw0” on no answer with “No Answer Delay” set to 6 seconds.
Caller calls Line 1 and if Line 1 is not picked up after 6 seconds, the FXO line picks up the call and
the call reverts to a PSTN-Gateway call as described in above. Notice that in this case HTTP
authentication is not allowed since 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 will NOT be authenticated.
Note: If the FXO line is busy at the moment of the forward, it will not answer the VoIP call. The call
forward rule is ignored and Line 1 will continue to ring.
4.11.5. Line 1 Forward-All to PSTN Gateway
Same as last case except the FXO picks up the Line 1 call immediately.
If the FXO line is busy at the moment of the call, the FXO line will not pick up the call and the call
forward rule is ignored and Line 1 will continue to ring.
4.11.6. Line 1 Forward to a Particular PSTN Number
The forward destination is set to “<target-number>@gw0>”.
This is the same as in examples above, except that the SPA will automatically dial the given target
number on the PSTN line right after it answers the VoIP call leg. This is a special case of 1-stage
dialing where the target number is hard-wired in the configuration. The caller will not be authenticated
in this case (regardless what the authentication method is set to). However the caller is still limited by
the <VoIP Caller ID Pattern> parameter
4.11.7. Line 1 Forward-On-Busy to PSTN Gateway or Number
Similar as the above cases of call forward to gw0, but this will apply when Line 1 is active
4.11.8. Line 1 Forward-Selective to PSTN Gateway or Number
Similar as the above cases of call forward to gw0, but this will apply when caller matches specific
caller-id pattern.
4.11.9. Line 1 User Dial 9 to Access PSTN-Gateway for Local Calls
Add the rule “<9,:1408>xxxxxxx<:@gw0>” to Line 1 dial plan.
When user dials 9, SPA plays outside dial tone. Then user dials 7 digits and the SPA pre-pends 1408
before dialing the final number on the PSTN line.
4.11.10. Line 1 Uses PSTN-Gateway for 311 and 911 Calls
Add the rule “[39]11<:@gw0>” Line 1.
When user dials 311 or 911, the call is routed to the PSTN gateway.
Note: If the FXO line is busy after the user dials 311 or 911, the call will still fail. For true life-line
supports, the FXO line cannot be shared therefore.
