Version 7.2 655 Mediant 800B Gateway & E-SBC
User's Manual 28. Analog Gateway
28.14.6 FXO Gateway Configuration
The following procedure describes how to configure the FXO interface (to which the PBX is
directly connected).
 To configure the FXO interface:
1. In the Trunk Group table page (see Configuring Trunk Groups on page 517), assign
the phone numbers 200 to 204 to the device’s FXO endpoints.
Figure 28-16: Assigning Phone Numbers to FXO Ports
2. In the Automatic Dialing table, 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".
Figure 28-17: FXO Automatic Dialing Configuration
3. In the Tel-to-IP Routing table, 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 28-18: FXO Tel-to-IP Routing Configuration
4. In the FXO Settings page (see 'Configuring FXO Parameters' on page 632), set the
parameter ‘Dialing Mode’ to Two Stages (IsTwoStageDial = 1).