Cellular telephone interface system for amps and cdma data...

H - Electricity – 04 – Q

Patent

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Details

H04Q 7/32 (2006.01) G06F 3/00 (2006.01) H04M 11/06 (2006.01)

Patent

CA 2267333

The cellular telephone interface system has the capability to automatically choose between AMPS and CDMA cellular transmission protocols for data transmissions. The cellular telephone interface system includes a PC-modem card, such as a PCMCIA card (8), for interconnecting the cellular telephone (4) to a data source, such as a laptop computer, portable facsimile machine, or the like. The cellular telephone (4) is capable of transmission in accordance with either AMPS or CDMA transmission protocols. For AMPS, the PC- modem card (8) converts data signals received from the data source into PCM signals for forwarding to the cellular telephone (4). The cellular telephone converts the PCM signals into AMPS formatted signals for transmission to a local cellular base station. For CDMA transmission, the PC-modem card (8) converts the data signals received from the data source into RS-232E signals for transmission to the cellular telephone.

Le système d'interface de téléphone cellulaire de l'invention a la capacité de choisir automatiquement entre des protocoles de transmission cellulaire AMPS et CDMA pour effectuer des transmissions de données. Le système d'interface de téléphone cellulaire comprend une carte modem de PC telle qu'une carte PCMCIA (8) destinée à interconnecter le téléphone cellulaire (4) à une source de données telle qu'un ordinateur portatif, un télécopieur portable ou autre. Le téléphone cellulaire (4) est capable d'effectuer une transmission conformément à l'un ou l'autre des protocoles de transmission AMPS ou CDMA. En ce qui concerne le protocole AMPS, la carte modem du PC (8) convertit des signaux de données provenant d'une source de données en signaux PCM destinés à être envoyés au téléphone cellulaire (4). Le téléphone cellulaire convertit les signaux PCM en signaux formatés AMPS devant être transmis à une station de base cellulaire locale. En ce qui concerne la transmission CDMA, la carte modem du PC (8) convertit les signaux de données provenant d'une source de données en signaux RS-232E devant être transmis au téléphone cellulaire.

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