3Com VCX v7111 User Manual page 43

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Connecting the V7111 24 PORT RS-232 Port to Your PC
Using a standard RS-232 straight cable (not a cross-over cable) with DB-9 connectors,
connect the V7111 24 PORT RS-232 port to either COM1 or COM2 RS-232 communication
port on your PC. The required connector pinouts and gender are shown in
For information on establishing a serial communications link with the V7111 24 PORT, see
Establishing a Serial Communications Link with the V7111
V7111 24 PORT RS-232 Cable Wiring
Figure 19
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3
5
DB-9 female for PC
DB-9 female for PC
®
3Com VCX V7111 VoIP Gateway User Guide
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RD
3
TD
5
GND
DB-9 male for MP 24
DB-9 male for MP-100
PORT
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24
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Figure 19.
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