Chapter 3 - Installing Extensions and Trunks
Chapter 3 3 - 19
SECTION 3-12
INSTALLING TIE LINES
3.12.1 Tie Line: 4TLIU
Tie lines must be bridged from the telco RJ21X to a line cross-connect (A) block. Each tie line requires two-pair
or four-pair (depending on the type of tie line) cross-connect from the RJ21X to the line (A) block. The A block
connects to the 4TLIU blade with a 25-pair cable.
Installing 2-wire/4-lead Tie Lines:
1. Punch down two pair cross-connect on the leads for each tie line on the CPE (customer) side of the
RJ21X.
2. Punch down the other end of the cross-connect to the line (A) block leads (in groups of 4 lines). Keep in
mind that two pins of the RJ-61 connector are not used for 2-wire tie lines.
3. Make sure the UX5000 is programmed correctly for 2-wire (Program 10-03-02) and the type is selected
(Program 10-03-03) for Type I or V.
4. Punch down a 25-pair cable to the opposite side of the line (A) block.
5. Plug in the corresponding RJ-61 connector to the 4TLIU blade connector.
6. Install bridging clips on the A block. Label cross-connect blocks A2, A3, etc.
RJ61 Cable Connector - 2-Wire E&M, CN1A - CN1D
Pin No. Connection Description
1-Not Used
2MControl signal to trunk
3-Not Used
4RVoice signal both ways
5TVoice signal both ways
6-Not Used
7EControl signal from
trunk
8-Not Used
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