Sun Microsystems SunSAI/P, User Manual

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12 SunSAI/P User’s Guide • November 1998
Hardware Handshaking (Ready/Busy)
Most terminals and printers use Data Terminal Ready (DTR) for Ready/Busy
hardware handshaking. The cable shown below supports this method.
FIGURE 4-3
Terminal/Printer Cable with DTR Handshaking
Note – Shielded cable must be used to remain in compliance with Part 15 of FCC
rules.
Note –
Some Okidata printers use a control signal on pin 11, called Supervisory
Send Data (SSD) instead of DTR. In this case, simply connect CTS on the female DB-
25 side to pin 11 of the male DB-25, instead of pin 20. Other printer manufacturers
may use different methods of flow control. Consult your printer's documentation for
specific wiring requirements.
1
2
3
4
5
6
7
8
20
22
Pin Pin
GND
TxD
RxD
RTS
CTS
DSR
SG
DCD
DTR
RI
GND
TxD
RxD
RTS
CTS
DSR
SG
DCD
DTR
RI
Signal
Shell
2
3
4
5
6
7
8
20
22
Signal
( Cable Shield)
Host Adapter
(DB-25 Male)
Peripheral
(DB-25 Male)