Black Box TS560A, Руководство пользователя

Страница: 27 / 67

24
LAN SOLUTION NETWORK TESTER
4.1 Voltage Check
All tests, except Jack ID, start with a check for voltages
on the pins on the tester’s jack. If voltage is found, the
message “Voltage Found—SEL Jack ID” is displayed.
You must press the SEL key to start the Jack ID test; this
will determine what type of interface or what voltages
are present on the jack.
The tester monitors the jack to see if the voltage is
removed for five minutes. The selected test will continue
if the voltage is removed, and the tester will shut itself
off after the five minutes.
The exception to this behavior is in the network modes
(Flash Link LED, PING Test, and Validate Link). When
voltage is found in these modes, the tester checks to see
if it is Ethernet phantom power. This is a voltage that is
connected to the center taps of the Ethernet interface
transformers of some network equipment to power
remote devices like IP phones or wireless transceivers.
This power is seen by the LAN Solution Network Tester
as voltage between the 1–2 and 3–6 pin pairs. The
voltage found is reported as “Enet Pwr Source Found =
xV” for several seconds, then the test proceeds
automatically.