Section 3: Installing Extensions and Trunks
3-10 Section 3: Installing Extensions and Trunks Aspila EX Hardware Man-
Installing 4-wire/8-lead Tie Lines:
1. For each trunk, run two-pair cable from the PSTN Network Termination point to the TLIU
PCB. Refer to Tie Line (4TLIU) PCB (Figure 2-14) (page 2-28) for details of the RJ61 con-
nector pin outs..
2. Make sure the strapping on the 4TLIU PCB is set to the proper type (2-wire or 4-wire and Type I,
II, III, IV or Type V). Refer to Tie Line (4TLIU) PCB (Figure 2-14) on page 2-28 for detail on
strapping.
3. Plug in the corresponding RJ-61 connector to the 4TLIU PCB connector.
Adding Ferrites to Tie Line Cables
1. Four ferrite sleeves are supplied with the TLIU PCB
2. Each cable that will be connected to the TLIU PCB must pass two times (one turn) through a
ferrite sleeve to comply with EMC requirements.
Figure 3-1: Example of one turn through a Ferrite Sleeve
3. The ferrite must be located, on the cable, as near as possible to the plug that will be connected
to the PCB.
Figure 3-2: Example of Ferrite Location.
RJ61 Cable Connector - 4-Wire E&M, CN100 - CN400
Pin No. Connection Description
1 SB Ground wire for control
2 M Control signal to trunk
3 R Voice signal to trunk
4 R1 Voice signal from trunk
5 T1 Voice signal from trunk
6 T Voice signal to trunk
7 E Control signal from trunk
8 SG Ground wire for control
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