No one likes a busy signal, most people will try a competitor if they can't get through to you. Unlimited local calling means no line limitations on your inbound or outbound calls within US and Canada. You can have multiple customers call you at the exact same time, and all calls will ring through until the call is answered. You are also able to place multiple outbound calls, while inbound calls are taking place without any interference. Local charges may apply to any local voice broadcasting or automated calling.