DB25 Female Connector (Wire Type)

Pin number Name
2 TXD – Transmit Data
3 RXD – Receive Data
4 RTS – Request To Send
5 CTS – Clear To Send
6 DSR – Data Set Ready
7 GND – Signal Ground
8 CD – Carrier Detect
20 DTR – Data Terminal Ready
22 RI – Ring Indicator

PINS (PARALLEL CONNECTION)
Pin number Name
1 _STR – Strobe
2 D0 – Data bit 0
3 D1 – Data bit 1
4 D2 – Data bit 2
5 D3 – Data bit 3
6 D4 – Data bit 4
7 D5 – Data bit 5
8 D6 – Data bit 6
9 D7 – Data bit 7
10 ACK – Acknowledgement
11 Busy
12 Paper Out
13 Select
14 Auto feed
15 Error
16 Reset
17 Select Input
18 Ground
19 Ground
20 Ground
21 Ground
22 Ground
23 Ground
24 Ground
25 Ground