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Printer ports
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LocalTalk and Ethernet ports
The LocalTalk and Ethernet ports implement a Printer Access Protocol (PAP) server that accepts only
one connection at a time. The port's device type is LaserWriter. The printer implements AppleTalk,
Phase 2 for the EtherTalk port. If you ordered your printer with the network option, you received the
Network Utilities diskettes and the Network Utilities for Phaser Color Printers User Manual.
Refer to that manual for complete information on Ethernet.
Printer name and AppleTalk zones
The Phaser 300X uses the same printer name on all ports. (The printer name is the name you see in
the list of printers when you select the Chooser.) If you change the name on one
port, the change effects all ports to keep them identical. This avoids confusion for users because they
always see the same printer name regardless of the port selected.
If you set the Ethernet zone to be the same as the LocalTalk zone, the printer automatically modifies
the name as seen on the LocalTalk network to be different from the name as seen on the Ethernet
network. For example, the default printer name Phaser 300X would be changed to
Phaser 300X (via LocalTalk). (If necessary, the name is truncated to the
32-character limit.) This automatic renaming allows users to distinguish the high-speed Ethernet
connection from the slower LocalTalk connection.
Parallel port
The printer has a standard unidirectional, byte-wide parallel, synchronous port. When you use the
parallel port, be sure to type this command at the PC (if LPT1 is not available, use LPT2):
MODE LPT1:,,P
The table shows the parallel port's connected pins. Other pins are not connected. Signal names
ending with a dash (-) are asserted low.
| Signal name |
Pin # |
Return
pin |
Signal source |
Description |
| DSTRB- |
1 |
19 |
Host |
Pulsed low for .5 microseconds minimum; clocks data into
printer |
| DATA1 |
2 |
20 |
Host |
Positive true data input |
| DATA2 |
3 |
21 |
Host |
Positive true data input |
| DATA3 |
4 |
22 |
Host |
Positive true data input |
| DATA4 |
5 |
23 |
Host |
Positive true data input |
| DATA5 |
6 |
24 |
Host |
Positive true data input |
| DATA6 |
7 |
25 |
Host |
Positive true data input |
| DATA7 |
8 |
26 |
Host |
Positive true data input |
| DATA8 |
9 |
27 |
Host |
Positive true data input |
| ACK- |
10 |
28 |
Printer |
Data acknowledge pulsed low for 3-4 microseconds; ends
bus transaction |
| BUSY |
11 |
29 |
Printer |
Positive true = cannot accept data |
| PE |
12 |
- |
Printer |
Positive true = out of paper |
| SLCT |
13 |
- |
Printer |
Positive true = printer selected |
| INPRIME- |
31 |
30 |
Host |
Negative true = printer port reset |
| FAULT- |
32 |
- |
Printer |
Negative true = printer fault indicator |
| Frame Gnd |
- |
17 |
Printer |
Frame ground |
| SGnd |
- |
14,16,33 |
Printer |
Signal ground |
Serial port
The printer's serial port provides an RS-232 interface connection to PCs and other hosts. The printer's
serial port has these built-in default settings.
- When Switch 7 on the printer's rear panel is in the down
position, you can change the default setting. To change the serial port's settings, you can use the
PostScript Level 2 setdevparams command. Refer to the Phaser 300X Drivers
and Utilities Printing Reference for details.
- Some PCs and Unix hosts do not support Space parity. Usually they
accept parity values of odd, even, or none.
Therefore the closest setting is 1200 baud, 1 stop bit, 8 data bits and no parity, which has the following
associated MODE statement:
- MODE COM1: 1200, N, 8, 1, P
- Space parity forces the parity bit to 0. For most users, 8 data bits and no
parity is identical to 7 data bits and Space parity.
Serial port signals
The following table shows the printer's serial port pinout.
| Signal name |
Pin # |
Printer I/O |
Description |
| DCD |
1 |
In |
Data carrier detect |
| RxData |
2 |
In |
Received data |
| TxData |
3 |
Out |
Transmitted data |
| DTR |
4 |
Out |
Data terminal ready |
| Gnd |
5 |
- |
Signal ground |
| DSR |
6 |
In |
Data set ready |
| RTS |
7 |
Out |
Request to send |
| CTS |
8 |
In |
Clear to send |
| RI |
9 |
Out |
Ring indicator |
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