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

Chapter 1 – Product Description and Specifications

Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide 9

RS232 15-Pin Connector Pinout

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.

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Multi-Tech Systems MTCBA-G-F4 User Manual Page 9