The following factors are affecting the performance of a copper pair and problems are increasing with the higher frequencies involved in ADSL/VDSL. The below conditions, should be tested when delivering a new service or during fault diagnosis.
- Return Loss
- Insertion Loss
- Longitudinal Balance
- Crosstalk
- Noise
- Interruptions
- Split Pairs
- Gauge Changes
- Bridge Taps
- Bad Cable Twisting
