Sierra Wireless DART 200 CDPD Modem The pin functions for pins labeled in Figure C-2 are listed in Table C-1, Pin Number Name Function Direction, Table C-2 lists the RS-232 signal interference specifications.

DART 200 CDPD Modem User’s Guide C Charts and Diagrams
Sierra Wireless, Inc. C-2
The pin functions for pins labeled in Figure C-2 are listed in Table C-1
Table C-1. Pin functions
Pin Number Name Function Direction
1DCD Carrier Detect To DTE
2RXD Receive Data To DTE
3TXD Transmit Data From DTE
4DTR Data Terminal
Ready From DTE
5GND Signal Ground Both
6DSR Data Set Ready To DTE
7RTS Request to Send From DTE
8CTS Clear to Send To DTE
Table C-2 lists the RS-232 signal interference specifications.
Table C-2. RS-232 signal interface
Direction Logical
Condition Voltage Level Load Status
Input (From DTE) One -3 to -25 VDC 5K Ohm OFF, Mark
Zero +3 to +25 VDC 5K Ohm ON, Space
Output (To DTE) One -5 to -8 VDC 3K Ohm OFF, Mark
Zero +5 to +8 VDC 3K Ohm ON, Space