• RJ11(6P/6C, 6P/4C, 6P/2C) LED indication：MT-7028
Transmitter cable map, 6P/6C each second from 2 to 7 in
sequence, 6P/4C each second from 3 to 6 in sequence, 6P/2C
each second from 4 to 5 in sequence is synchronized with the
MT-7028 Receiver cable map. If it encounters an empty line,
the indication will cease.
Figure 4 Different Connector’s Cable Map
4) You can use the MT-7028 Transmitter and Receiver to validate
the cable map on RJ11 and RJ45 connectors. The cable map
function finds the most common wiring status on twisted pair
cabling: good, shorts, opens, and crossed pairs as shown in
Figure 5
• Good wiring: Each LED that corresponding to an active pin
flashes briefly and in a stairway order.
• Shorts: If two LEDs turn on for 1 second at the same time, those
two pins are shorted together. If more than 2 wires are shorted
together, the LEDs for the shorted pins indicate opens.
• Opens: If an LED flashes briefly, then no LEDs turn on, that pin is
open.
• Crossed pairs: If one LED flashes briefly, then another LED lights
for one second, the wire for the first LED is crossed pairs to the pin
for the second LED.
5) Each LED corresponds to an active pin flashes briefly, it should
light for about 1 second. The brief flash shows which LED is next
in the sequence.
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