Data communications method involves expanding call indication tone sequence to terminal device with appended information transmitted prior to charge-incurring connection from network

摘要

The method involves expanding the call indication tone sequence to the terminal device (8) with appended information transmitted prior to a charge-incurring connection from the network. The appended information is the call number, the called ID, present in the terminal adapter (1) during a call and output via an interface (3) to the connected terminal device.