Data transmission performance of existing circuit switched modems and protocols over analog cellular networks

摘要

PacTel Corporation evaluated the performance of various laptops, modems and cellular phones for mobile data communications. Commercial versions of different modems and protocols were tested over a combination of analog cellular network and PSTN. Tests were conducted from a moving mobile in a high usage cellular system. Results indicate that the analog cellular network may be commercially utilized for data transmission in the realm of 1200 bits/second with existing modem products. For reliable transmission at data rates above 1200 bits/second changes (enhancements) to existing protocols and/or modulations techniques appear to be necessary.