Installation 2-92.8 Extension ConnectionExtension jacks 01 through 08 for the KX-TA308 and extension jacks 01 through 16 for theKX-TA616 can be used for all kinds of telephones.Telephone WiringThe maximum length of the extension line cord (twisted cable) which connects the system andthe extension is as follows.Diameter of the line Max. lengthSingle Line Telephone 22AWG 1798m(Station Loop Limit: 24AWG 1128m600 ohms including set) 26AWG 698mProprietary Telephone 22AWG 360m(Station Loop Limit: 24AWG 229m40 ohms) 26AWG 140m2 or 4-conductor wiring is required for each extension as listed below. There are 4 pinspossible for connection: “T” (Tip), “R” (Ring), “L” (Low) and “H” (High).• If a telephone or answering machine with an A-A1 relay is connected to the system, set theA-A1 relay switch on the telephone or answering machine to the OFF position.ConnectionInsert the modular plugs of the telephone line cords (2 or 4-conductor wiring) into the modularjacks on the system.TelephoneSingle line telephonesProprietary telephone(e.g., KX-T7330)Wiring1 pair wire (T, R)2 pair wire (L, H, T, R)To extensions(JACK 01–08 for the KX-TA308,JACK 01–16 for the KX-TA616)TH R LH: HighT: TipR: RingL: LowView of TEL Jack (Extension)* The illustration on this page is a KX-TA308.!!