Chapter 1 – Description & Specifications

 

 

 

 

 

 

 

 

 

 

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.

 

RS232 15-Pin Connector Pinout

 

 

5

 

1

 

 

 

10

6

 

 

 

1 5

 

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PIN

EIA

CCIT

Designation

 

1

DCD

109

Data Carrier Direct

 

6

RX

104

Receive Data (out)

 

2

TX

103

Transmit Data

RS

8

DTR

108.2

Data Terminal Ready

9

GND

 

 

Signal Ground

232

 

 

7

DSR

107

Data Set Ready

 

 

12

RTS

105

Request to Send

 

11

CTS

106

Clear to Send

 

13

RI

125

Ring Indicator

Audio

4

MICROPHONE (+)

 

 

 

 

5

MICROPHONE (-)

 

 

 

 

10

SPEAKER (+)

 

 

 

 

15

SPEAKER (-)

 

 

 

Boot

3

BOOT

 

 

For factory use only.

Reset

14

RESET

 

 

To reset, connect to GND

 

 

 

 

 

 

momentarily. Open for normal

 

 

 

 

 

 

operation.

Multi-Tech Systems, Inc. MultiModem GSM/GPRS User Guide

12

Page 12
Image 12
Multi-Tech Systems MTCBA-G-F1 manual LED Indicators, RS232 15-Pin Connector Pinout, Designation