Currently, the fastest speed offered by dial-up modems is 33.6 kbps. Future 56-kbps modems, due next year, will approach ISDN rates in connection speed. The move by Shiva is an important one because in order for users to get higher transmission speeds, the modem at the central site that remote users dial into must also support 56-kbps protocols. The central site modem has to have a digital connection to the phone network.
The Shiva products will be based on a chipset developed by Rockwell (ROK) and will be used in Shiva remote networking products for small offices, corporate site access, ISPs, and carriers, the company said.
The 56-kbps technology is able to overcome the speed limits of current modems by taking advantage of digital switches in the telephone infrastructure. Under optimal conditions, the new modems will be able to deliver transmission rates up to twice that of 28.8-kbps modems, and with the use of V.42 compression throughput is increased to 224 kbps downstream and 115.2 kpbs upstream.
Shiva did not say when the new products with the Rockwell chipset would become available.