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Figure 28 shows the connections between the PABX and the PC, laptop or
printer and adaptation between 9-pin and 25-pin connetcors.
2
3
4
5
6
7
8
3
2
6
5
4
8
7
Printer (DC E)
9-p in c onnec tor
Fig. 27 RS 232 Connection variants
Line designations for a 9-pin connector
2
=
RxD
3
=
TxD
4
=
DTR
5
=
Ground
Line designations for a 25-pin connector
2
=
TxD
3
=
RxD
4
=
RTS
5
=
CTS
Serial port settings:
9600 Baud
8 Data bits
C onnec ting c ord (9-p in RS 232 c onnec tor)
PAB X (DC E) 9-p in c onnec tor
2
3
4
5
6
7
8
2
3
4
5
6
7
8
PC / Lap top (DTE)
9-p in jac k
6
=
DSR
7
=
RTS
8
=
CTS
6
=
DSR
7
=
Ground
20
=
DTR
Parity: none
37
2
3
4
5
6
7
8
2
3
3
2
20
7
6
4
5
2
3
PC / Lap top (DTE)
Printer (DC E)
25-p in jac k
25-p in jac k
1 Stop bit
4
5
6
7
8
6
7
2 0
5
4
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