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TM 11-5895-878-14&P
are normal-through wired to allow breaking of the circuit
b. Description and Circuits.  Each patch panel
for testing and rerouting it via patch cords.  The top
contains 12 channels. Each channel occupies a paired
allows the operation to be performed on the portion of
jackset (a jackset consists of 4 jacks arranged vertically)
the circuit toward the incoming or outgoing line, while
of the panel as shown in the schematic diagram, figure
the second row allows the operation to be performed on
FO-4. The transmit circuit occupies the left jackset (odd
the portion of the circuit toward the local equipment.
numbered jacks) in each paired jackset, and the receive
The jacks in rows 3 and 4 are parallel wired to monitor
jackset occupies the right jackset (even numbered
the jacks in rows 1 and 2 respectively. These jacks do
jacks); therefore, the jacks should be alternately labeled
not interfere with the circuit. The patch panels have two
"TRANS" and "REC." The top row of jacks are labeled
cable connectors mounted on the rear of the panel and
"LINE" and are electrically toward the line or away from
are used to bring the transmit and receive circuit leads
the TCF equipment.  The Second Row is labeled
from the IDF into the panel.
"EQUIP" and is electrically toward the local equipment.
The top two rows,
2-17

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