(A) No person except a public utility engaged in the business of providing communications services and facilities shall use or operate, attempt to use or operate or cause to be used or operated or arrange, adjust, program or otherwise provide or install any device or combination of devices that will, upon activation, either mechanically, electronically or by other automatic means, initiate an intrastate call and deliver a recorded message to any telephone number assigned to any subscriber by a public telephone company, without the prior written consent of such subscriber.
(B) The term "telephone number" includes any additional numbers assigned by a public utility company engaged in the business of providing communications services and facilities to be used by means of a rotary or other system to connect with the subscriber to such primary number when the primary telephone number is in use.
(`78 Code, § 5.16.010.)