A portable radio telephone handset operates as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode, are available in the handset. The handset distinguishes between...http://www.google.es/patents/US6334062?utm_source=gb-gplus-sharePatente US6334062 - Portable communications and data terminal operating to optimize receipt of both incoming CDPD and AMPS messages
Portable communications and data terminal operating to optimize receipt of ...
