3Com VCX v7111 User Manual page 278

Figure 104 V7111 FXS & FXO Remote IP Extension
Dialing from Remote Extension
(Phone connected to FXS)
To configure the call:
Lift the handset to hear the dial tone coming from PBX, as if the phone was connected
1
directly to PBX.
FXS and FXO V7111 gateways establish a voice path connection from the phone to the
2
PBX immediately the phone handset is raised.
Dial the destination number (the DTMF digits are sent, over IP, directly to the PBX).
3
All tones heard are generated from the PBX (such as Ringback, busy or fast busy tones).
4
There is one-to-one mapping between FXS ports and PBX lines.
5
The call is disconnected when the phone connected to the FXS goes onhook.
6
Dialing from other PBX line, or from PSTN
To configure the call:
Dial the PBX subscriber number the same way as if the user's phone was connected
1
directly to PBX.
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3Com VCX V7111 VoIP Gateway User Guide