Triplett TVR10/100/1000 - Manual (Page 44)

If there is a short or open on pairs 1,2 and 3,6 all communications
will be prevented. If there is a short or open on pairs 4,5 or 7,8 the
data rate may drop.
A faulty cable with missing or faulty pairs 4,5 or 7,8 may cause the
data rate on that cable to drop. If this faulty cable is between a PC
and hub or switch, all data going to and from that single PC will be
at a slow rate. If the faulty cable is between two hubs or switches
then communications will be quick at times and slow other times.
Communications between PCs connected to the same hub or switch
will be quick. Communications between a PC on one hub or switch
across a faulty cable to a PC on another hub or switch will be slow.
This type of problem can be very difficult to find without a TVR1000.
Real World Certifier: If your job requires testing the speed
parameters of a cable (is it Cat 5E? is it Cat 6?) and printing test
results, take a look at the Byte Brothers Real World Certifier at www.
bytebrothers.com. It has all of the features of the TVR1000 plus ad-
ditional troubleshooting capabilities that might be helpful in your job.
42