Installation guide

Network Adapter Card Installation Guide - Book II
111
- Short in cable. : Two or more cable pairs are short-circuited
together. VCT reports the distance to the
short-circuit in meters.
- Open in cable. : Lack of continuity between the pins at each end
of the twisted-pair cable, i.e. the cable pair is
not connected correctly. VCT reports the distance
to the open location in meters.
- Impedance mismatch. : The impedance on the cable pair is not correct.
Possible reasons for impedance mismatch:
- The cable pair is not connected properly.
- The cable pair is damaged.
- The connector is faulty.
VCT reports the distance to the impedance
mismatch in meters.
- Test failed! : The test of the cable pairs was not successful.
You can also retrieve the current VCT and DSP status with the following
command:
ndd /dev/skge0 vct_status
For the example above you will get the following message:
"VCT status for skge0: New VCT and old DSP
data!"
If the link was never up and VCT has not been started up to now, you will
get the following message:
"VCT status for skge0: No VCT or DSP data!"