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Configuring the PSTN (FXO) Gateway on the SPA3102
How PSTN-To-VoIP Calls Work
ATA Administration Guide 101
6
VoIP Outbound Call Routing
Calls made from Line 1 are routed through the configured Line 1 service provider,
by default. You can override this behavior by IP dialing, through which the calls can
be routed to any IP address entered by the user. The ATA device allows flexible
call routing with four sets of gateway parameters and configurable dial plans. The
following table lists VoIP outbound call routing parameters.
Gateways 1 to 4 can be specified in a dial plan with the special identifier gw1,
gw2, gw3, or gw4. Also, gw0 represents the internal PSTN gateway via the FXO
port. You can specify in the dial plan to use gw
x
(
x
= 0,1,2,3,4) when making certain
calls. In general, you can specify any gateway address in the dial plan. In addition,
three parameters are added that can be used with call routing:
• usr: User-id used for authentication with the given gateway
• pwd: Password used for authentication with the given gateway
• nat: Enable or disable NAT mapping when calling the gateway
Parameter Web
Page
Description Values
Gateway 1 Line 1 Fully qualified domain name (or IP
address) of a gateway. If the port
number is not specified, 5060 is
assumed.
Domain name or IP
address.
The default is blank.
GW1 Nat
Mapping
Enable
Line 1 Whether to enable NAT mapping
when using Gateway 1.
Yes or No
The default is no.
GW1 User ID Line 1 The authentication user name when
using Gateway 1.
31-character string
The default is blank.
GW2 Password Line 1 The authentication password when
using Gateway 1.
31-character string.
The default is blank.