Oki PT330 Guia Del Usuario página 73

(2) Serial Interface Connector
Pin No. Signal Name
1
SG
2 TXD
3 RXD
4 RTS
5 CTS
6 DSR
7 SG
8~19 N.C
20 DTR
21~24 N.C
25 INIT
Caution: Use a lock screw with an imperial thread on the connector.
Direction
- Signal Ground
Output Transmit Data
Input Receive Data
Output Request to Send
Input Clear to Send
Input Data Set Ready
- Signal Ground
- No Connection
Output Data Terminal Ready
- No Connection
Input Forcible Reset Signal
71
Signal Line Name