For purposes of this chapter:
The term “Commission” means the Federal Trade Commission.
(4) The term “telemarketing” means a plan, program, or campaign which is conducted to induce purchases of goods or services, or a charitable contribution, donation, or gift of money or any other thing of value, by use of one or more telephones and which involves more than one interstate telephone call. The term does not include the solicitation of sales through the mailing of a catalog which—
where the person making the solicitation does not solicit customers by telephone but only receives calls initiated by customers in response to the catalog and during those calls takes orders only without further solicitation.