Black Box SCAN-LAN VI Manual page 84

SCAN-LAN VI
Test Results
Split pair
(continued)
1
8
2
7
3
6
4
5
4-pair cable with USOC pairing
Figure 8-5. Common Wiring Configurations.
82
Possible Solutions
The SCAN-LAN VI is designed to test for EIA/TIA 568
pairing (1,2; 3,6; 4,5; 7,8). USOC pairing is 1,8; 2,7; 3,6; 4,5.
If testing a USOC cable, you will get a split pair between pins
1,2 and 7,8.
Another common pairing is 1,2; 3,4; 5,6; 7,8. If testing this
type, you will get a split pair message between 3,6 and 4,5.
If a split pair is not expected, make sure the cable is twisted pair.
Using silver-satin untwisted cable will also result in split pairs.
Check the coloring of the wiring at all termination points for
proper pairing. Correct the wiring as necessary.
1
2
3
6
4
5
7
8
EIA/TIA 568
1
1
8
2
2
3
7
4
3
5
6
6
4
7
5
8
Other common pairing
1
2
3
6
4
5
7
8
1
2
3
4
5
6
7
8