External Serial Port Pin-Out - BT Inspiration Installation & Maintenance Manual

External serial port Pin-out

Female 9-Way connector which plugs in to
a local printer or PC
5 4 3
8 7
9
9 Way D-Type connector Pin Description
Pin 1 - DCD Data Carrier Detect Pin
Pin 2 - Receive Data Pin
Pin 3 - Transmit Data Pin
Pin 4 - DTR Data Terminal Ready
Pin 5 - Signal Ground
Pin 6 - DSR Data Set Ready
Pin 7 - RTS Request to send
Pin 8 - CTS Clear to send
Pin 9 - RI Ring Indicate
2 1
Note
A standard, commercially available, DB-9 to DB-25 way
converter connector will operate with the external serial
port when connecting to equipment which is not fitted
with a DB-9 connector as standard.
6
Equivalent 25 way D-Type Pin Description
Pin 8
Pin 3
Pin 2
Pin 20
Pin 7
Pin 6
Pin 4
Pin 5
Pin 22
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