39
APPENDIX A: Twisted-Pair Cable Pinning/Pairing
NOTES
In runs of our EHN840 cable over 655 ft. (199.6 m) long, you might get
much better video quality if, at both ends of the cable, you swap the
green and brown pairs so that White/Green is on pin 7, Green/White on
pin 8, White/Brown on pin 3, and Brown/White on pin 6.
The extender has been tested with all major makes of CAT5 cable
including Black Box, Berk-Tek™, Mohawk
®
, and AT&T
®
. The extender
has also been tested and found to work, in certain situations, with 4-pair
Category 3 cable or with four pairs of 25-pair UTP trunk cables instead
of 4-pair Category 5 cable. But we do not recommend such installations.
We don’t normally recommend using CAT5e cable
(rated for up to
155 Mbps)
for runs longer than 400 ft. (121.9 m), although our EYN795MS
cable has performed well in testing in runs up to the full 1000 ft.
(304.8 m). Avoid using cables rated “Level 6,” “Level 7,” etc. If you have
problems getting a good picture with CAT5e cable, or if you must use
cables with bandwidths higher than 155 Mbps,
please contact Tech
Support; the signal-skew problems caused by tightly twisted pairs in these
cables can sometimes be resolved by swapping which pairs are used for
which signals or by using an external delay line.
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