Dialing from Remote Extension (Phone at FXS)

The following procedure describes how to dial from the 'remote PBX extension' (i.e., phone connected to the FXS interface).

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To make a call from the FXS interface:

1.

Off-hook the phone and wait for the dial tone from the PBX. This is as if the phone is connected directly to the PBX. The FXS and FXO interfaces establish a voice path connection from the phone to the PBX immediately after the phone is off-hooked.

2.

Dial the destination number (e.g., phone number 201). The DTMF digits are sent over IP directly to the PBX. All the audible tones are generated from the PBX (such as ringback, busy, or fast busy tones). One-to-one mapping occurs between the FXS ports and PBX lines.

3.

The call disconnects when the phone connected to the FXS goes on-hook.