The Design And Implement Of A TCP/IP Based Information Telephone And Associate VAS System

In this paper, the design and implementation of a TCP/IP based information telephone and the associated Value-Added Service (VAS) system is presented. The information telephone, which can automatically send and receive e-mail and Short Message Service (SMS), is implemented by adding a new chip to a conventional telephone. The development the new chip and its operating system is discussed. As a Short Message Center (SMC) and a gateway, the VAS system connects the Internet, PSTN and GSM with e-mail and SMS.