Sierra Wireless MP215 - Manual (Page 18)

MP215 Mobile Modem Installation, Configuration, and User’s Guide
Sierra Wireless Inc. 05/11/99 3-4
Figure 3-5 Power Supply Connection Diagram
CAUTION
The MP215 is designed for negative ground vehicles
and will not function in a positive ground vehicle.
3.3. Modem Status Indicator
The front panel of the MP215 has a single green LED indicator. The LED has
several functions as outlined in Table 3-1 LED Indications. The LED is flashed
when the modem’s receiver has picked up a channel in either AMPS mode or
CDPD mode. Note that it does not indicate that the modem is registered on the
network, just that a valid channel has been acquired.
Table 3-1 LED Indications
LED Action Meaning
Off Modem power off
On solid Modem power on
On flashing Modem acquired a channel (CDPD or
AMPS)
3.4. Speaker
The MP215 comes equipped with a speaker connection. The speaker output is
particularly useful for Circuit Switched Cellular operation (AMPS) to provide
audible connectivity information such as network messages or dial tones and can
be an effective debug tool for connectivity problems. The speaker output provides
1/10 watt into an 8-ohm load
12V Battery
+ -
On/Off
Switch
12 Volt (Red)
Ignition Sense
(White)
Ground (Black)