Testing Twisted-Pair Cabling; Testing Access Point-To-Device Network Communications; Testing End-To-End Network Communications - HP ProCurve 420 Installation And Getting Started Manual

Then, when you reset the access point, note the messages that are displayed.
Additionally, you can check the access point's event log, which can be
accessed from the web browser or a Syslog server.

Testing Twisted-Pair Cabling

Network cables that fail to provide a link or provide an unreliable link between
the access point and the connected network device may not be compatible
with the IEEE 802.3 Type 10Base-T, or 100Base-TX standards. The twisted-pair
cables attached to the Access Point 420 must be compatible with the appro­
priate standards. To verify that your cable is compatible with these standards,
use a qualified cable test device.
Testing Access Point-to-Device Network
Communications
You can perform the following communication tests to verify that the network
is operating correctly between the access point and any connected device that
can respond correctly to the communication test.
Ping Test -- a network layer test used on IP networks that sends test
packets to any device identified by its IP address
These tests can be performed through the access point's console interface
from a terminal connected to the access point or through a Telnet connection.
For more information, see the Management and Configuration Guide, which
is on the Documentation CD-ROM that came with your access point.

Testing End-to-End Network Communications

Both the access point and the cabling can be tested by running an end-to-end
communications test -- a test that sends known data from one network device
to another through the access point. You can run a Ping test to verify that the
entire communication path between the two network devices is functioning
correctly.
Troubleshooting
Hardware Diagnostic Tests
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