VF Patch Panel

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