User guide

Chapter 1 - Description and Specifications
Multi-Tech Systems, Inc. MultiModem CDMA User Guide 9
Input/output electrical characteristics for external connections
Parameters
800 MHZ 1900 MHZ
Unit
Typ. Typ
Input Supply Voltage 5 13.2 32 5 13.2 32 V
Input supply current in
comm. mode at full Tx
power
600 230 100 650 240 100 mA
Input supply current in
comm. mode at full Tx
power
240 100 50 250 100 50 mA
Input supply current at idle 50 20 20 50 20 20 mA
LED Indicators
TD. Transmit Data.
Lit when modem is transmitting data.
RD. Receive Data.
Lit when modem is receiving data.
CD. Carrier Detect.
Lit when data connection has been
established.
LS. Line Status. Continuous “on” state indicates that
the wireless modem is not registered on
the network.
Flashing state indicates registration on
network.
Off state. Modem is off (not ready) or in
download mode.
TR. Terminal Ready.
Commonly called “Data Terminal Ready.”
This is a readiness signal from the PC.
PWR. Power.
Indicates presence of DC power when lit.