Linksys ATA Administration Guide
80
Sharing One VoIP Account Between the FXS and PSTN Lines
Configuring the PSTN (FXO) Gateway
Sharing One VoIP Account Between the FXS and PSTN
Lines
Both the FXS (Line 1) and FXO (PSTN Line) can to receive incoming calls for a single VoIP
account if they are different ports. Consider the following:
•
If the service provider allows multiple registration contacts and simultaneous ringing,
both lines can register periodically with the service provider. In this case, both lines
receive inbound calls to this VoIP account. The PSTN Line should be configured with a
sufficiently long answer delay before the call is automatically answered to allow for the
function of the PSTN gateway.
•
If the service provider does not allow more than one register contact, the PSTN Line
should not register. In this case, only Line 1 rings on the inbound call to this VoIP
account because it is the only line registered with the service provider.
•
Line 1 can have the call forwarded to the PSTN Line after a few seconds using the Call-
Forward-On-No-Answer feature with gw0 as the forward destination. Similarly, Line 1
can apply Call-Forward-All, Call-Forward-On-Busy, and Call-Forward-Selective feature,
and direct the caller to the PSTN-Gateway.
•
Only PIN authentication is allowed when a VoIP caller is forwarded to the PSTN-gateway
from Line 1. If HTTP Authentication is used, the caller is not authenticated.
•
When using the Forward-To-GW0 feature, you can forward the caller to a specific PSTN
number, using the syntax <
PSTN-number
>@gw0 in the forward destination. When using
this with Call-Forward-Selective, you can develop some interesting applications. For
example, you can forward all callers with 408 area code to 14081234567, or all callers
with 800 area code to 18005558355 (This is the number for Tell Me). When this syntax is
used, authentication is not used and the target PSTN number is automatically dialed by
the Linksys ATA device after the caller is forwarded to gw0.
