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connections but do not indicate the location of the
cross. RJ-11 cables used for telephone
connections are often crossed. Even new cables
are often crossed. This seldom affects the
performance of standard analog telephone lines
(POTS). Digital telephone lines and old
touch-tone phones may be polarity sensitive, so a
crossed cable may prevent then from working
properly.
CABLE REPAIR
1. General
Information:
The following section
provides information to the user about
common cable types, common failures and
repairs. It is not meant to be an exhaustive
study of the topic, just some basic
information that the uninitiated may find
helpful.
2. Cable damage:
When a cable tests
badly, either the wire of the connectors or
both may be at fault. If the cable has been
installed and working, then it’s likely that the
wire or connectors have been abused in
some way. The wire portion of the cable can
be damaged by being crushed (under the left
of a desk), stretched (pulled sharply around a
corner), punctured (by a nail or staple), over
loaded (hit by lighting), etc. Similar abuses
will damage the Connectors on the ends of
the cable. The connectors can also be
damaged by excessive insertion and removal
Summary of Contents for 15-AT002
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