Optus S2 User Manual page 40

5 CONFIGURATION ACCESSORIES
The default horn alert setting is five seconds of alert tone (2
rings) before horn starts then the horn will sound for 5
seconds (2 rings). The handset will continue to ring after the
horn stops.
Setting Operation
Off Horn alert disabled.
1 hr Phone will stay on for 1 hr after ignition
turned off and ring horn if incoming call.
2 hr Phone will stay on for 2 hr after ignition
turned off and ring horn if incoming call.
10 hr Phone will stay on for 10 hr after ignition
turned off and ring horn if incoming call.
On Phone will not switch itself off and the horn
will be activated if incoming call.
2 min Test After ignition is turned off, the phone will
remain on for two minutes before turning
itself off. Any incoming calls will sound the
horn during this two minutes.
Note: Max Relay coil current is 150mAmps.
WARNING
Do not start the vehicle while the Optus MobileSat S2
is powered on. Sudden voltage fluctuations (due to
cranking) may damage the phone
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5 CONFIGURATION ACCESSORIES
Thermal Control
The Optus MobileSat S2 transceiver can be configured to
provide an output to control the operation of a fan. If this line
is connected to a relay to control the power supply to the fan,
the S2 transceiver will turn the relay on when the internal
temperature of the unit crosses the predefined threshold. The
transceiver will turn off the relay when it has cooled to below
a predefined threshold.
This control line does not operate when the phone is powered
down.
RTS Control
The Optus MobileSat S2 can be powered on/off by the RS232
RTS line.
If (and only if) the unit is powered on by assertion of the RTS
line, then the phone will power down when the RTS line drops.
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