Intel Corporation

Nels E Satterlund

Glenn M Lewis

Michael A Gley

Carl J Epolite

A switching multi-mode modem that switches on the four wire side of the DAA where the two-wire side of the DAA is connected to a land based telephone network. The modem includes a DAA, a first DSP capable of performing all modem digital signal processing functions and a second DSP capable of performing conversion and compression of analog voice signals to digital signals. The modem includes a headset connector and a cellular telephone connector and a switching network connected between the first DSP, the second DSP, the four-wire side of the DAA, the cellular telephone connector and the headset connector. The modem further contains a microcontroller which is connected to the first DSP and the second DSP and the switching network and separates audio signals from data signals and causes the switching network to switch into states that configure the modem to operate in one of the following states: Radish voice mode, or a Radish data mode, or a cellular telephone mode, or a business/audio mode or a digital simultaneous voice and data mode upon command from said microcontroller.

Four wire modem signal switching for voice and data applications

An interface card has an interface logic block for interfacing a peripheral device with a computer host and for selecting either a common memory mode or an audio mode where the computer host can enable or disable a common memory read or write operation in the common memory mode. In the common memory mode, the computer host can choose to read card information service (CIS) bytes internally or externally. The interface logic block has, (a) a first external pin used either for a common memory chip select (CMCS) signal in the common memory mode or for an audio-in (AudIn) signal for the audio mode, (b) a second external pin used either for a common memory write (CMWR) signal in the common memory mode or for an audio-out (AudOut) signal in the audio mode, (c) a plurality of registers, (d) a logic circuit coupled to the registers, and (e) a microcontroller which can enable or disable the common memory write operation. The registers further include a configuration option register (COR), a card configuration and status register (CCSR), a pin replacement register organization (PRRO), a memory card address register, a memory card data register and an interface configuration register (ICR). Attribute memory range select bits in the ICR allow firmware selectable attribute memory locations of CIS bytes, the COR, CCSR and PRRO.

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Loomis, CA, United States of America

Nels E Satterlund