CUEING INTERFACE. -- CENTRAL STATION SIMULATOR THIS BOX ALLOWS YOU TO CONNECT TWO (2) LANDLINE TELEPHONE DEVICES. ---- PHONE OR FAX MACHINE TO EACH OTHER. WHEN YOU PICK UP THE ONE (OFF CAMERA) THE OTHER ONE (ON CAMERA) WILL PROPERLY RING WHEN CONNECTING TWO (2) FAX MACHINES, THE RING CYCLE TIMING CAN BE ACCURATELY BACK TIMED, FULLY AND ACCURATELY REPEATABLE. RENTAL --- $ 150. PER WEEK PURCHASE --- $500. CALL show contact info AT VAN NUYS. -- 405 and 101 FWY AREA