Interfaces; Leds; Rs232 15-Pin Connector Pinout; At Command Information - Multitech MultiModem MTCBA-G-F4 User Manual

Chapter 1 – Product Description and Specifications

Interfaces

LEDs

Transmit Data. Lit when modem is transmitting data.
TD
Receive Data. Lit when modem is receiving data.
RD
Carrier Detect. Lit when data connection has been established.
CD
Line Status.
LS
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.
Terminal Ready. Commonly called "Data Terminal Ready." This is a readiness signal from the
TR
PC.
Power. Indicates presence of DC power when lit.
PWR

RS232 15-Pin Connector Pinout

PIN
RS-232 1
6
2
8
9
7
12
11
13
Audio 4
5
10
15
Boot 3
Reset 14

AT Command Information

AT commands for the GPRS wireless modem are published in a separate reference guide. You can find
this guide on the Multi-Tech website.
IP commands for GPRS modems are also published in a separate reference guide. This guide is also
included on the Multi-Tech website.
10
5
10
1 5
EIA CCIT
DCD 109
RX 104
TX 103
DTR 108.2
GND
DSR 107
RTS 105
CTS 106
RI 125
MICROPHONE (+)
MICROPHONE (-)
SPEAKER (+)
SPEAKER (-)
BOOT
RESET
Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide
1
6
11
Designation
Data Carrier Direct
Receive Data (out)
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
For factory use only.
To reset, connect to GND momentarily
(typical: 2mSec). Open for normal operation.