Led Indicators - Multitech MultiModem MTCBA-G-UF1 User Manual

TD. Transmit Data.
RD. Receive Data.
CD. Carrier Detect.
LS. Line Status.
TR. Terminal Ready.
PWR. Power.
Multi-Tech Systems, Inc. MultiModem® GPRS with USB User Guide

LED Indicators

Lit when modem is transmitting data.
Lit when modem is receiving data.
Lit when data connection has been established.
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.
Commonly called "Data Terminal Ready." This is a readiness signal from
the PC.
Indicates presence of DC power when lit.
Chapter 1 – Description & Specifications
11