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4 5 0 5 / 4 5 0 5 p s o r 4 5 1 0 / 4 5 1 0 p s U s e r ' s G u i d e
The 4505/4505ps printers provide a parallel port, serial port,
and one additional network interface port option, all of which
may be active at the same time.
The 4510/4510ps printers provide a parallel port, serial port,
and three additional network interface port options, all of
which may be active at the same time.
To coordinate automatic switching among the ports, the
printer monitors the parallel, serial, and network interface
ports for incoming data. When a print job is detected on one
port, the printer sends a busy signal to the other ports and
queues the print job into memory for processing. This is
called port polling. Note that while all ports may be
simultaneously active, only one port at a time is able to
receive a print job.
For the 4505/4505ps printers:
When print jobs are pending on all three ports (parallel,
serial, and the network interface port), the port polling
sequence is:
1 Parallel
2 Serial
3 Network
4 Back to Parallel
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