metrotek Bercut-MMT, Operation Manual

Page: 62 / 85

62 Network Interfaces Information
Figure 10.4. Copper Cable Diagnostics
The following data are present in the table:
• status — possible cable states:
– normal — pair is OK;
– short — short circuit;
– open — beak (absence), i.e. cable is connected at one side only;
– fiber — optical cable;
– no-device — SFP module not present;
– fail — cable test was not run;
• amp — amplitude of signal reflected from a defect; value range is from
–1000 to 1000 mV;
• distance — cable length in meters; value range is from 0 to 255 (field
is valid for short and open states only; in other modes it is n/a );
•
skew — difference in transmission time over the longest and the short-
est cable pair (phase distortion value), range of values is from 0 to 15
ns;
•
polarity — twisted pairs polarity, can be negative/positive;
•
cross — twisted pairs crossed connection (MDI/MDI-X); this field is
valid for 1000BASE-T mode only and can have the following states:
– a-b-c-d — connection is performed with straight cable;
– a-b-c-d — connection is performed with crossed cable (cross-over).
Note:
in case this field is not valid, n/a or — is displayed.
Bercut-MMT: Ethernet Networks Analysis