25.15.6 FXO Gateway Configuration
The procedure below describes how to configure the FXO interface (to which the PBX is
directly connected).
 To configure the FXO interface:
1. In the Endpoint Phone Numbers page (see Configuring Endpoint Phone Numbers on
page 203, assign the phone numbers 200 to 207 to the device’s FXO endpoints.
2. In the Automatic Dialing page, enter the phone numbers of the FXS device in the
‘Destination Phone Number’ fields. When a ringing signal is detected at Port #1, the
FXO device automatically dials the number ‘100’.
3. In the Tel to IP Routing page, enter 10 in the ‘Destination Phone Prefix’ field, and the
IP address of the FXS device (10.1.10.3) in the field ‘IP Address’.
Figure 25-17: FXO Tel-to-IP Routing Configuration
4. In the FXO Settings page (see 'Configuring FXO Parameters' on page 264), set the
parameter ‘Dialing Mode’ to Two Stages (IsTwoStageDial = 1).