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Chapter 1 - Description and Specifications
Multi-Tech Systems, Inc. MultiModem CDMA User Guide 10
RS232 15-Pin Connector Pinout
10
11
6
15
15
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 (-)
Reset 14 RESET To reset, connect to GND
momentarily. Open for
normal operation.