NetWare 4.1/9000 Print Services

B-9
Cabling Printers
Optimal Serial Cabling
Figure B-5 Optimal Serial Pin Connections
NOTE: Superscript numbers in the graphic correspond to notes on the next couple of pages.
In parallel communication, a “high” signal level ranges around 5 volts. A “low”
signal level ranges around 0 volts. In serial communication, the “low” range is -3 to
3 volts, the “high” ranges are -15 to -3 and 3 to 15.
In the following sections, the conventions “input” and “output” determine what
controls the signal. “Input” means the signal is controlling the device; “output”
means the device is controlling the signal.
Functions on the PC Side of Serial Printer Cables
1 FG (Frame Ground reference pin)
PC Printer
-- 11FG
322 TXD
233 RXD
7 4 (High) 4 (High) RTS
855 CTS
666 DSR
577
188 DCD
4 20 (Handshaking pin) 20 (High) DTR
1
2
3
4
5
6
7
8
9
12
14
7
SG
9-pin 25-pin25-pin Function
2
3
4
5
6
7
8
9
1
10
11
13
13
13