LiftMaster EL25 EL25 Installation Ver. 3.0 Manual - Page 13

Wiring with No Telco Line The unit can be a stand alone system that allows communication between the unit and a resident's phones. Single Unit Never run Telco wires and High Voltage wires in the same conduit. The high voltage wires may interfere with the Telco wires, possibly causing the system to malfunction. NOTE: Ringer Equivalence Number (REN) of "5" maximum. Use 18-24 AWG 2 twisted pair Output Board (See page 6) RES Ring Tip TELCO Ring Tip Multiple Units (Up to 7) Wiring with No Telco Line NOTE: Ringer Equivalence Number (REN) of "5" maximum. Home Phone IMPORTANT: You must program the unit ID's for each unit wired in the series. See Keypad Programming Manual. IMPORTANT: Only disable the Telco mode of the unit farthest away from the house. See "Disable Telco Mode" in the Keypad Programming Guide. Use 18-24 AWG 2 twisted pair To next unit (Unit ID 3 then 4 etc.) RES TELCO Ring Tip Unit ID 1 Output Board (See page 6) Ring Tip RES TELCO Ring Tip Unit ID 2 Output Board (See page 6) Ring Tip Page 11