Cablediag application is not working on X440-G2-48p/t platforms.
Even though cable is present cable diagnostics output shows as "OPEN", the same as is on the following example.
X440-G2-48p-10GE4.1 # run script cablediag.py -p 11
+ C A U T I O N +
+ cablediag will momentarily interfere with traffic on active ports +
+ Ports: 11 +
Do you want to continue cable diagnostics? [y/N]: y
Collecting port cable diagnostic information may take a moment...
port 11: cable (4 pairs, length +/- 10 meters)
pair A Open, length 0 meters
pair B Open, length 0 meters
pair C Open, length 0 meters
pair D Open, length 0 meters