Electronics Line Infinite Prime Installation Manual page 41

5.2.4: TWA Follow-Me
The TWA Follow-Me feature is designed to establish a Two-Way Audio connection with
the user in the event of an alarm. For this feature to function, the account's protocol must
be defined as TWA Follow-Me.
The sequence for a Two-Way Audio Follow-me call is as follows:
1. An alarm occurs.
2. The control system dials the programmed telephone number and
sounds two DTMF tones when you pick up the call.
3. Press "2" on your telephone; the control system opens the audio channel.
If you press "9" to answer the call, the control system simultaneously cancels the siren
when opening the audio channel.
4. If the TWA mode is defined as "Simplex", (see 10.6.12: TWA Mode),
the audio channel opens in Listen mode (microphone active/speaker
mute). To switch to Speak mode, press "1" on your telephone. To
switch back to Listen mode, press "0" on your telephone.
5. The duration of the call is determined by the TC/VM Timeout. Ten
seconds before the timeout expires, two short DTMF tones are
sounded. To extend the call, press "7" on your
command restarts the timeout.
6. To disconnect before the end of the timeout, press " " then "#" on
your telephone.
-41-
telephone. This