NOYAFA NF-268 - Manual (Page 6)

If more than 2 cables is disconnected, the corresponding leds won’t
be on.
If less than 2 cables is disconnected, all the leds won’t be on.
If No.2 &No.3 is misorder, it will show as below
Emitter: 1-2-3-4-5-6-7-8-G
Receiver:1-3-2-4-5-6-7-8-G
Your excellent helper in cable test!
3.Main functions
3.1
as below) trace STP/UTP network cable (connected with exchanger or switch
Connect the network cable to be tested to RJ45 port. Push the key
of receiver to “Scan”, the indicator flashes, which means the receiver
is normal. Then hold the receiver to trace cable, keep the probe close
to cables and judge the volume.
When loudest voice is heard, it means it is the targeted cable.
Note:in this case, users should alter the volume to degree 1-3 in order
to find out targeted cable precisely
3.2 trace energized telephone cable (connected with exchanger or
switch as below as below)
3