When one PC is requesting the printer status, the printer is occupied for about one second. In the meantime, if another PC attempts to request the printer status, its request will not be accepted. Because this request is automatically performed by the CPU, it will often happen that while a user is using applications other than Explorer or Status Window, the user will surprisingly get a message on the monitor saying that the printer is offline or that the cable is disconnected.
When one PC is sending its print job, it occupies the printer for a time. The other PC then gets a message on the monitor saying that the printer is off, or offline, or that the cable is disconnected.
This product allows multiple CPUs to share one parallel printer (or other parallel device) without the need for manual selection or sharing.
Automatic input selection is on a first-come, first-served basis. When one user is finished printing, the auto-switch waits for a period of time (adjustable from 5-60 seconds), then reverts to polling all input ports for activity.
Port switching is transparent to all users, and there is no software required. As soon as the printer port is cleared, the next waiting job will be passed through.