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Configuring the PSTN (FXO) Gateway on the SPA3102
Sharing One VoIP Account Between the FXS and PSTN Lines
ATA Administration Guide 103
6
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 points:
• 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 ATA device after the caller is forwarded to gw0.
Parameter Web
Page
Description Value
Auto PSTN
Fallback
Line 1 If enabled, the ATA device automatically
routes outbound calls to Gateway 0 when
registration fails or network link is down.
The
default is
yes.