Ala. Code § 37-8-217
For the purposes of this section, and Sections 37-8-218, 37-8-220, and 37-8-221, the term "prohibited instrument" shall mean and include any instrument, apparatus, equipment, device or appliance, or the plan or instruction for the making or assembling thereof, which is designed, adapted or may be used to avoid billing to the proper person or payment of the lawful price, charge or toll, in whole or in part, for any telephone, telegraph or other telecommunication service or for the transmission of a message, signal or other communication by or over the facilities of telephone, telegraph or other telecommunication, or to conceal the existence, place of origin or destination or the true identity of the sender, addressee or receiver of any message, signal or other communication by or over the facilities of telephone, telegraph or other telecommunication from the supplier thereof or any lawful authority or to violate any provision of this section, Section 37-8-218, Section 37-8-220, or Section 37-8-221.
Ala. Code § 37-8-217 (1975)