Lesson 2/Learning Event 5
Learning Event 4: WIRING RECORDS
Orderly progression is one of the most important considerations when
working on distributing frames and requires careful plans and complete
records. Such records become part of the permanent station file. Included
are cable records, running sheets, cross-connect records, and circuit data
cards. The circuit data card contains the essence of the other records and
therefore is the one most often referred to.
a. Cable Record.
The outside plant cable installer prepares a
duplicate cable record for the station. This record shows in tabular form
the termination of every pair in the cable attached to the line side of the
protector assembly.
b. Running Sheets.
Using information from the cable record, the
station planner identifies the needed lines and terminations on running
sheets.
Running sheets must show at least the following information:
Designated circuit numbers, terminal numbers on the line protector assembly,
frame-mounted terminal boards, equipment, and terminal boards in equipment
cabinets, along with color codes. The installer of the inside plant follows
the instructions in the running sheet to make his connections.
c. Cross-Connect Record. A cross-connect record card shows the jumpers
that are installed between terminal blocks on the distributing frame. This
record card relates the information of the cross-connect jumpers without
necessarily indicating details of the circuit.
d. Circuit Data Card.
A circuit data card shows the origin and
termination of each circuit, incorporating all information with as much
detail as necessary. Each circuit is recorded on its own data card and is
kept in station files for the life of the circuit. Cross-reference is made
on the card to the appropriate cable records, running sheets, and cross-
connect records to minimize the number of entries.
Learning Event 5: CABLE FORMING
An orderly method of processing the cable pairs is essential to avoid
confusion at the time of installation and during circuit-tracing procedures.
Multipair cables are formed during installation.
To make up a cable form
the installer first removes a portion of the sheath and brings out the
exposed pairs
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