AT&T 518-600-016 manual Administering Tie Lines

Administering Tie Lines

Available only with MERLIN II System Release 3, a tie line module provides up to four tie line ports. For many installations, placing tie lines in one or more pools will be most convenient for their use. By default, lines in pools are set to not ring at stations. No ring is the recommended setting at an attendant station for dial repeating tie lines. However, if the lines are administered as automatic ringdown, they should be set for immediate ring at the attendant station.

Each tie line port must be administered individually. In addition, each port has associated with a set of five DIP switches that must be set to choose the signaling mode. The tie line module has two blocks of DIP switches (S1 and S2). The bottom DIP switch block (S1 ) contains two sets of five switches, one set each for port 1 and port 2. Like the bottom block, the top DIP switch block (S2) contains two sets of five switches, one set each for port 3 and port 4. See Figure 3-5.

3-50 Administering a New System