Panasonic KX-P8420 Operating Guide

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Appendix
The bidirectional parallel interface is based on the IEEE P1284-C standard.
If your computer has a bidirectional parallel port, the printer driver and 
printer can take advantage of faster data transfer.
 Specifications
 Pin configuration
Connector Type
IEEE 1284-C type connector
Cable
Use a shielded cable 1.8 m (5.9 ft) or less in length.
Signal pin
Return side pin
Signal
1
19
Busy
2
20
Select
3
21
nAck
4
22
nFault
5
23
PError
6
24
Data 1
7
25
Data 2
8
26
Data 3
9
27
Data 4
10
28
Data 5
11
29
Data 6
12
30
Data 7
13
31
Data 8
14
32
nlnit
15
33
nStrobe
16
34
nSelectin
17
35
nAutoFd
18
+5V(Host)
36
+5V(Peripheral)
Bidirectional 
Parallel Interface