Section 70859 - Signal Systems(a) A call system shall be maintained in operating order in all nursing units. Call systems shall be maintained to provide visible and audible signal communication between nursing personnel and patients. The minimum requirements are: (1) A call station or stations providing extension cords to each patient bed. These extension cords shall be readily accessible to patients.(2) A visible signal in the corridor above the door of each patient room.(3) An audible signal and light indicating the room from which the call originates shall be located at the nurses' stations. Alternate systems must be approved in writing by the Department.(b) The call system shall be provided in each patient's toilet room, bathroom and shower room in locations easily accessible to the patients. Electric shock hazard shall be eliminated by grounding or by an equally effective method.(c) The call systems shall be designed to require resetting at the calling station unless a two-way voice communication component is included in the system.Cal. Code Regs. Tit. 22, § 70859