SIP User's Manual 244 Document #: LTRT-65415
MediaPack Series
Upon detection of an MWI message, the FXO device sends a SIP NOTIFY message to the
IP side. When receiving this NOTIFY message, the remote FXS device generates an MWI
signal toward its Tel side.
Figure 8-7: MWI for Remote Extensions
8.2.4.3.4 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.
Figure 8-8: Call Waiting for Remote Extensions
8.2.4.3.5 FXS Gateway Configuration
The procedure below describes how to configure the FXS interface (at the 'remote PBX
extension').
¾ To configure the FXS interface:
1. In the ‘Endpoint Phone Numbers’ page (see Configuring Endpoint Phone Numbers on
page 124, assign the p
hone numbers 100 to 107 to the device's endpoints.
Figure 8-9: Assigning Phone Numbers to FXS Endpoints
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