User Documentation
2053260000/05/2015124
Installation
3.7.2 Function testers
While the simple cable tester only tests for a correct electrical connection, the
function tester checks the cabling section from the perspective of real Ethernet
data transmission.
Figure 3.3: Function measurement on the cabling
This measuring device transmits pre-dened data packets over the cabling. The
remote unit is the counterpart for responding to these packets.
Alternatively there are devices which can directly verify the transmission
parameters in the time range that are of relevance for Fast Ethernet and display
the error location in the event of parameters being exceeded.
Certain function testers can however also detect other active devices, such
as switches and network participants, on the network and apply the standard
diagnosis network protocols (e.g. ICMP).
The measurement data obtained then allows a statement to be made as to
whether the section can transfer Ethernet data packets.