User's Manual

Table Of Contents
Installation________________________________________________ Boomer-III User Manual & Integrator’s Guide
Copyright Wavenet Technology © October 2003 30 BM310012WT04
Modem On/Off Control
The modem on/off input line (HOSTPWR_ON) is an active high input
signal and is fitted with a 33 series resistor for input protection.
Internally it is passively pulled low (after the series resistor) to ground
and is asserted with a high input signal.
The Boomer-III modem is fitted with a Real Time Clock that third
party applications may utilise to wake-up the modem at a pre-
programmed alarm time. This facility may be utilised to further reduce
current consumption in battery powered applications, but note that the
modem may need to re-register on the network after wake-up
The electrical interface specification and equivalent circuit is as
follows:
Modem On/Off Control Equivalent Circuit
Modem On/Off Control Electrical Characteristics
Parameter Range Low High
Input Voltage 0-3V OR 0-5V 1.0 V (max) 2.5 V (min)
Input Current 20 µA (max) 100 µA (max)