Version 6.4 341 March 2012
SIP User's Manual 18. GW and IP to IP
18.6.14.4 Call Waiting for Remote Extensions
When the FXO device detects a Call Waiting indication (FSK data of the Caller Id -
CallerIDType2) from the PBX, it sends a proprietary INFO message, which includes the
caller identification to the FXS device. Once the FXS device receives this INFO message, it
plays a call waiting tone and sends the caller ID to the relevant port for display. The remote
extension connected to the FXS device can toggle between calls using the Hook Flash
button.
18.6.14.5 FXS Gateway Configuration
The procedure below describes how to configure the FXS interface (at the 'remote PBX
extension').
To configure the FXS interface:
1. In the Trunk Group Table page (see Configuring Trunk Group Table on page 251,
assign the phone numbers 100 to 104 to the device's endpoints.
Figure 18-28: Assigning Phone Numbers to FXS Endpoints
2. In the Automatic Dialing page (see 'Configuring Automatic Dialing' on page 326), enter
the phone numbers of the FXO device in the ‘Destination Phone Number’ fields. When
a phone connected to Port #1 off-hooks, the FXS device automatically dials the
number ‘200’.
Figure 18-29: Automatic Dialing for FXS Ports
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