A series phone line connection uses both modular jacks on the unit. A phone cord connects from the wall into one of the jacks and another cord connects the other jack to the telephone and other telephone equipment (similar to Fig 2a). A series connection is preferred since the unit will operate properly whether it is remains configured to the factory default voltage detection mode, or it has been reconfigured to the current detection mode. For an explanation on how to accomplish this, see page 40. Additional information on voltage vs. current detection of On and Off Hook can be found in Appendix A on page 44.
A parallel phone line connection uses only one of the modular jacks. The wall outlet is split such that one cord connects to the unit, and another cord connects with the telephone and other telephone equipment. This type of connection can be used only if the unit remains configured in the factory default voltage detection mode. Current detection will be used only if the voltage Detection is not compatible with your phone lines as explained in “Section IV - Trouble-shooting” on page 37. Additional information on voltage vs. current detection of On and Off Hook can be found in Appendix A on page 44.
