Multi-Tech Systems MTCBA-G-F4 - Manual (Page 9)

Chapter 1 – Product Description and Specifications
Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide 9
RS232 15-Pin Connector Pinout
10
11
6
1 5
1 5
PIN EIA CCIT Designation
1 DCD 109 Data Carrier Direct
6 RX 104 Receive Data (out)
2 TX 103 Transmit Data
8 DTR 108.2 Data Terminal Ready
9 GND Signal Ground
7 DSR 107 Data Set Ready
12 RTS 105 Request to Send
11 CTS 106 Clear to Send
RS-232
13 RI 125 Ring Indicator
4 MICROPHONE (+)
5 MICROPHONE (-)
10 SPEAKER (+)
Audio
15 SPEAKER (-)
Boot 3 BOOT For factory use only.
Reset 14 RESET To reset, connect to GND momentarily (typical:
2mSec). Open for normal operation.
AT Command Information
AT commands for the GPRS wireless modem are published in a separate Reference Guide included on the
MultiModem CD and posted on the Multi-Tech web site.
IP commands for GPRS modems are also published in a separate Reference Guide included on the MultiModem
CD and posted on the Multi-Tech web site.