Dial inbound meter interface unit (MIU) for automatic meter reading using no subscriber line access controller

摘要: The present invention is a method by which dial inbound MIU able to provide for connection with central station computer without the need any specialized telephone equipment at company's office. If customer's phone has been called, detects whether customer answered. It then waits until hangs up, and when up it siezes line modem tone indicative of presence waiting establish communication. that present, will connect permit communication take place before releasing line.