Motorola Motorola PTP 250, Руководство пользователя, Страница: 230 / 236

Testing link end hardware Chapter 8 Troubleshooting
phn-2182_002v000
8-10
May 2011
6 Record how many Ping packets have been lost. This is reported by Command
Prompt on completion of the test.
The test has passed if the number of lost packets is less than 2.
Test resistance at the PoE end of the drop cable
If the above procedures fail to diagnose the issue, there may be a fault in the wiring of
the drop cable that connects the ODU (or LPU) to the PoE power supply. Perform this
task to test the resistances between the RJ45 pins.
Use the PTP drop cable tester ( Figure 8-4 ) to make testing easier. This can be ordered
from http://www.motorola.com/ptp/support by selecting Order Cable Tester and
completing the order form.
NOTE
The values printed on the PTP drop cable tester do not apply to the PTP 250.
Figure 8-4 Drop cable tester (front and back views)
Unplug the drop cable from the DATA & POWER OUT port of the PoE power supply.
Connect the drop cable tester to the end of the drop cable. Then, perform the tests
described in
Table 8-1 . Record the results in the Result column, if this is helpful.