Specifications

Section 3: Installing Extensions and Trunks
3-8 ◆ Section 3: Installing Extensions and Trunks Aspire S Hardware Manual
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, whic
h 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. 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 sensitiv
e (tip to tip, ring to ring).
2. Punch down the other end of the cross-connect to the line (A) block (in groups of 4 lines of the
same line type).
3. Punch down a 25-pair cable to the opposite side of the line (A) block.
4. Plug in the corresponding RJ-61 connector to the COIU PCB connector (Figure 3-5).
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.