Pro's Kit MT-7068 - Page 12

4. You can use the MT-7068 Toner and Probe 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 7.
• 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 that corresponding to an active pin flashes briefly, it should light for about 1 second. The brief
flash shows which LED is next in the sequence.
1-8
Good
3,4
Shorts
MT-7068-R Receiver
Cable Map
3
Opens
3,4
Crossed
Pairs
Figure 7 Good Wiring, Shorts, Opens, Crossed Pairs
MT-7068-T Toner
Cable Map