User's Manual

Table Of Contents
Installation_________________________________________________ Boomer II User Manual & Integrator’s Guide
Wavenet Technology 34 BM210012WT27
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 and clamp diode to the
internal supply line for input protection. Internally it is passively pulled
low (after the series resistor) via a 56k pull-down resistor to ground
and is asserted with an actively driven high signal. To turn the modem
off it must be actively pulled low to ground. 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 0-3.3 V
OR
0-5V 0.4 V (max) 1.0 V (min)
Input Current 400 µA (max) 100 µA (max)