
13. If the installed printer is connected to a parallel port, but Windows is unable to use bi-directional
communication with the device, check to see if either the PC’s BIOS is misconfigured or the
parallel cable does not support bi-directional communication. Setting the parallel port to use ECP
in the BIOS setup might solve the problem.
HP WS Pro Proxy Agent
1. Verify that the HPWSProxy service is using port 27893. Open a Windows command window,
and issue the following command:
netstat –a –b
In the returned list, you should find the following:
UDP 0.0.0.0:27893 *.* [HPDeviceProxyService.exe]
Alternatively, double-click the HP Device Proxy Console App file, and verify that there is no
exception. This file is available in the following locations:
• For 32-bit OSes:
C:\Program Files\Hewlett-Packard Company\HPWSProxy\HPWSProxy\bin
• For 64-bit OSes:
C:\Program Files (x86)\Hewlett-Packard Company\HPWSProxy\HPWSProxy\bin
If HP WS Pro Proxy Agent is installed on the same machine as HP Web Jetadmin and PC-
connected discoveries are run through HP Web Jetadmin, there is a conflict because both want to
use port 27893.
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