| Verification Testing |
|
Verification testing
is a basic test that makes sure a cable will function as it
is intended. Most verification testers utilize a wiremap test
with a numeric representation of the results. Typically the
upper row of numbers is fixed and represents the detected wires
at the testers Main or Send jack while the lower line of numbers
shows the actual wiring. The cable run is checked for opens,
shorts, crossed pairs, split pairs, and reversed pairs.
Copper cabling failures are most commonly caused by one of the
following:
1. Installation errors
2. Bad connectors
3. Bad cable |
| Test Result - Possible Cause of Result |
| OPEN: |
| |
| Wires broken by stress at
connections |
 |
| Cables routed to
wrong connection |
| Damaged connector |
| Cuts or breaks in
cable |
| Wires connected to wrong pins at connector
or punch block |
| Application-specific
cable (e.g. Ethernet using 12/36 only) |
|
| SHORT: |
| |
| Improper connector termination |
 |
| Damaged connector |
| Conductive material stuck between pins at a connection |
| Damage to cable |
| Application-specific cable (e.g. factory
automation) |
|
| REVERSE
PAIR: |
| |
 Wires
connected to wrong pins at connector or punch block |
| CROSSED
PAIR: |
| |
| Wires connected to wrong pins at connector
or punch block |
 |
| Mix of 568A and 568B wiring standards (12 and 36 crossed) |
| Crossover cables used (12 and 36 crossed) |
|
| SPLIT
PAIR: |
| |
 Wires
connected to wrong pins at connector or punch block |
|
| |
