Since the market is incapable of controlling rates for AOS companies, the Commission has had to impose regulatory controls. Ameritech dominates the long distance calls within the LATAs. The Commission also requires AOS providers to identify themselves before the call and provide rates on request. The Public Service Commission of Wisconsin has authority only over calls within Wisconsin. The FCC has not imposed ceilings on the price of interstate calls, so callers should be particularly vigilant when using credit cards to place interstate calls.
Consumers can do several things to protect themselves against being overcharged.
Or, you can find another telephone. Another option is to dial a special code or 800 number to use another long distance provider. To find out how, contact your provider. Do not assume that by using a calling card from one particular long distance provider you will be charged that provider's rates. A calling card is a credit card, and when you place a call, the provider you use will charge its own rates.