Section 3: Installing Extensions and Trunks
Aspila EX Hardware Manual Section 3: Installing Extensions and Trunks 3-5
3
INSTALLING CO/PBX LINES
Ground Start/Loop Start Line Cabling
There are four types of COIU PCB providing loop start or ground start trunks as shown in the table
below.
The CN3 and CN5 connectors each provide connection to 4 analogue trunk ports. The analogue trunks
and power failure circuits are not polarity sensitive.
! Important !
• When using the COIU-LG1 PCB for ground start trunks, the PBX and Earth grounds must be
connected as described on page 1-32 or the trunks will not function correctly.
• When connecting the RJ61 cables to the COIU PCB, note the position of the Power Failure con-
nector. Do not confuse this connector as the trunk connector.
Installing Ground Start/Loop Start Lines
To install a ground start trunk/loop start line:
1. For each trunk, run one-pair cable from the PSTN Network Termination point to the COIU
PCB. Refer to Analogue Trunk (4/8COIU) PCB (Figure 2-12) (page 2-23) for details of the
RJ61 connector pin outs.
4COIU-LS1 4 loop start lines
8COIU-LS1 8 loop start lines
4COIU-LG1 4 ground start trunks
8COIU-LG1 8 ground start trunks
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