NOYAFA NF-3368 - Manual (Page 9)

Your excellent helper in cable test! 7
The Numbered LEDs don’t indicate that a GOOD connection
exists, only that a connection exists. If the Short or Cross LEDs
are Lit, there is a fault in the cable.
7.6.4 Connected LED/3Beepers/Short LED/Numbered LEDs
If the Connected LED lights, the Beeper emits 3 beeps, and the Short
LED lights, the cable has a fault. The Numbered LEDs indicate the
location of a short.
Note:
In the Short mode, the Numbered LEDs only indicated the
location of the shorts. The other connections in the cable are
not indicated. If more than 3 numbered LEDs light, there may
be multiple shorts in the cable.
7.6.5 Connected LED/2Beepers/Cross LED/Numbered LEDs
If the Connected LED lights, the Beeper emits 2 beeps, and the Cross
LED lights, the cable has a fault.
Notes:
In the Cross-mode, the Number LEDs indicate connections
but do not indicate the location of the cross.
RJ-11 cables used for telephone connections are often crossed.
Even new cables are often crossed . This seldom affects the
performance of standard analog telephone lines(POTS).
Digital telephone lines and old touch-tone phones may be
polarity sensitive, so a crossed cable may prevent them from
working properly.