
112
TX/CX 4000
7. Operation—Coax
If the PC print job is sent while a
host job is printing, the printer
responds as “busy” to the PC print
request. The print job can be
spooled through a spool program or
sent to the printer when the host job
is finished. If the PC’s printer port is
set for infinite retry through the
DOS “Configure Printer” command
(described in the DOS manual), the
print job waits for the printer to be
available to receive the data.
When the TX/CX 4000 is not
processing a print job, the LCD
display will show whether the
interface is READY or OFF LINE and
whether the selected output port
(parallel or serial) is READY or NOT
READY. When the TX/CX 4000 is
processing a print job it will indicate
from which input port the print job
is coming (host, serial, or parallel)
and to which output port the print
job is directed (serial or parallel).
When the printer is turned on, the
interface checks for a proper 9-pin
host attachment cable to determine
which mode of operation is desired.
If none is found, a message is shown
on the front panel, and the interface
waits for a proper cable to be
attached. With the TX/CX 4000
installed and a coax host adapter
cable attached, an ASCII printer
emulates a 3287, 3262, 3812-1, 4028,
4214, or 4224 (non-IPDS) printer on
a 3270-type host system.
7.1 Printer Sharing
The TX/CX 4000 allows the printer
to automatically share printing from
an attached PC/LAN (any parallel
or serial source) and an IBM coax
host. The TX/CX 4000 uses a
timeout between each print to select
the next printing without changing
cables or switches.
At the end of a host print job, the
TX/CX 4000 waits for the specified
Host Port Timeout period before it
honors data streams coming in
through the parallel or serial ports.
The Host Port Timeout period is set
through Host/PC download
command 51 or through the front
panel. After a parallel or serial print
job is completed, the interface will
again wait for a period of time
before it honors host print jobs. The
P/S Timeout is set through Host/PC
download command 50 or through
the front panel.