US Robotics 56K MESSAGE MODEM - QUICK FOR WINDOWS Guía de usuario Pagina 96

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TECHNICAL REFERENCE
88
Serial Interface Pin Definitions
Signal Source
DB-25 DB-9 Circuit Function Computer/Modem
1 AA Chassis Ground Both
2 3 BA Transmitted Data Computer
3 2 BB Received Data Modem
4 7 CA Request to Send Computer
5 8 CB Clear to Send Modem
6 6 CC Data Set Ready Modem
7 5 AB Signal Ground Both
8 1 CF Carrier Detect Modem
12 SCF Speed Indicate Modem
20 4 CD Data Terminal Ready Computer
22 9 CE Ring Indicate Modem
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