ワイヤーマップ結果が赤色だがリンクは "Qualified" となる

You may well see red numbers on the Wire Map as shown below in CableIQ Reporter Software:

Fluke Networks CableIQ Reporter Screen

And when printed:

CableIQ Red Wire Map

The red numbers seen here on the Wire Map result indicate a split pair.
 
A split pair would normally result in a Non Qualified result. However, the application test selected here was only Telco. Some Telco tests might be done through normal telephone cords, which show split pair due to the flat construction - but will of course still support a voice connection - so the CableIQ correctly gives the result as "Qualified". It was felt that we should notify the user that a split pair was detected, even though the link is "Qualified".