Microplex M204 Especificaciones descargar pdf (Pagina 131)

USING THE M204’S ADDITIONAL OPTIONS: General Options 123

Backchannel Method

In addition, printer feedback can be directed to a serial I/O port through the use of a

backchannel method. For example, if you like the speed of the parallel port but need

the printer status, you could set up a backchannel to one of the serial ports. From here,

you have two choices:

1 Utilize host software to obtain this data such as Adobe TranScript or Sun NeWS-

print with npd (see npd Pseudo-device Interface on page 42).

2 Make use of the I/O port’s associated destination (see list pserver on page 87) and

manipulate its logpath to use one of the choices mentioned earlier in this sub-sec-

tion.

To make use of a backchannel method, the printer must be able to support input on

one port and be able to output status on another.

Please see set dest on page 94 to conﬁgure a backchannel.

Lp Method

The M204 provides its own version of the lp print command. This is used in conjunc-

tion with rsh/rcmd/remsh within an interface script or directly from the command

line on the host. By default, it provides parallel port printer status and can also be con-

ﬁgured to report incremental byte counts as the job prints. It can also show the job

position in the M204’s queue as it moves to the top.

Using lp will provide printer error messages as well as job status.

If lp is used from the command line, any printer status will come right back to the

screen. If used within an interface script, the messages will go to the log ﬁle located in

the spooling directory.

Since lp must be used with rsh/rcmd/remsh only, this feature is only offered with a

print setup utilizing an interface script or with a rsh/rcmd/remsh command from the

command line on the host.

Please see lp on page 89 and rsh/rcmd/remsh on page 31 for further details.

Controlling the Frame Types Used by the M204

Various frame types can be used by the Print Server at any given time but each sup-

ported protocol’s frame type conﬁguration is completely separate from another proto-

col’s. This frame type support is conﬁgurable.

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Microplex M204 Especificaciones Pagina 131