User`s guide

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