In a very small 48TQFP package the iChip has everything your need to send and receive information on the internet. It has its own 10K SRAM buffer to manage IP/UDP/TCP/ICMP data and supports TCP and UDP Sockets. The S7600 was designed for embedded dialup applications and supports PPP+PAP and has a buffered UART that supports 300bps up to T1/E1 Rates. All that it needed is a very small processor to tell the iChip what you want to send or receive and a modem or other serial connection. The iChip does the rest.