A power and communication transmission system, for transmitting power and communications to an active device, the system comprising: a hybrid cable having an electrical conductor and an optical fiber, the hybrid cable including a first end and a second end; a first interface for connecting the first end of the hybrid cable to electrical power and to fiber optic communication; a second interface for connecting the second end of the hybrid cable to the active device such that electrical power and fiber optic communication are provided to the active device, the second interface including an independent interface structure including an interface unit that is independent from the active device; the first interface including an AC/DC power converter that converts the electrical power provided to the first end of the hybrid cable from alternating current to direct current having a first DC voltage, the hybrid cable being used to transmit the electrical power from the AD/DC power converter to the second interface and being used to transmit optical communication signals between the first and second interfaces; and the interface unit of the second interface including a DC/DC power converter for converting the electrical power provided from the hybrid cable to a second DC voltage that corresponds to an electrical voltage requirement of the active device, the interface unit of the second interface also including an optical-to-electrical converter for converting the communications signals carried by the optical fiber from an optical form to an electrical form such that the communications signals are provided to the active device in the electrical form. a hybrid cable having an electrical conductor and an optical fiber, the hybrid cable including a first end and a second end; a first interface for connecting the first end of the hybrid cable to electrical power and to fiber optic communication; a second interface for connecting the second end of the hybrid cable to the active device such that electrical power and fiber optic communication are provided to the active device, the second interface including an independent interface structure including an interface unit that is independent from the active device; the first interface including an AC/DC power converter that converts the electrical power provided to the first end of the hybrid cable from alternating current to direct current having a first DC voltage, the hybrid cable being used to transmit the electrical power from the AD/DC power converter to the second interface and being used to transmit optical communication signals between the first and second interfaces; and the interface unit of the second interface including a DC/DC power converter for converting the electrical power provided from the hybrid cable to a second DC voltage that corresponds to an electrical voltage requirement of the active device, the interface unit of the second interface also including an optical-to-electrical converter for converting the communications signals carried by the optical fiber from an optical form to an electrical form such that the communications signals are provided to the active device in the electrical form.