Installing Co/Pbx Lines; Loop Start Line Cabling; Installing Loop Start Lines (Figure 3-5); To Install A Loop Start Line - NEC Aspire S Manual

Section 3: Installing Extensions and Trunks

INSTALLING CO/PBX LINES

Loop Start Line Cabling

Loop start lines must be bridged from the telco RJ21X to a line cross-connect block (A). Each loop start CO/
PBX line requires one-pair cross-connect cable from the RJ21X to the line (A) block.
The A block connects to the trunk PCB with a 24 pair cable. The line (A) block(s) should be arranged in
groups of 4 (8 pins) to correspond to the COIU PCB slots.
The CN2 and CN4 connectors each provide connection to 4 analog trunk ports, which are polarity sensitive
(tip to tip, ring to ring). The power failure circuits, however, are not polarity sensitive.

Installing Loop Start Lines (Figure 3-5)

To install a loop start line:

1.
2.
3.
4.
5.
3-8 ◆ Section 3: Installing Extensions and Trunks
Punch down one pair cross-connect to the tip and ring leads for each line on the telco RJ21X CPE
(customer) side of the block.
The CN2 and CN4 connectors are polarity sensitive (tip to tip, ring to ring).
Punch down the other end of the cross-connect to the line (A) block (in groups of 4 lines of the
same line type).
Punch down a 25-pair cable to the opposite side of the line (A) block.
Plug in the corresponding RJ-61 connector to the COIU PCB connector (Figure 3-5).
Install bridging clips on the A block.
Note: Repeat steps 1-5 for each loop start line. Label cross-connect blocks A2, A3, etc.
Aspire S Hardware Manual