Abstract: A plurality of modems or modem types can run on a host processor, a digital signal processor or both, either concurrently or selectively. Modules of more than one modem program can be swapped in and out of DSP memory space. Common modem code can be run on either a host processor or on a DSP using respective command libraries.

Abstract: An audio modem provides both the functionality needed for audio processing and that needed for implementing one or more modems. A digital signal processor utilizes a plurality of serial ports to interface with one or more codecs used for interfacing an analog audio channel and with one or more modem codecs used for interfacing an analog communications channel.

Abstract: According to an embodiment of the invention, a modem provides functionality for audio processing and for implementing a modem. A digital signal processor is connected to one or more audio codecs to interface with an analog audio channel, and is connected to one or more modem codecs and a data access arrangement to interface with a communications channel.

Abstract: An interface for coupling a modem port with a transmission line includes a hybrid converter having a variable gain amplifier coupling a transmit path of a first differential polarity and a received path of a second differential polarity.

Abstract: A plurality of modems or modem types can run on a host processor, a digital signal processor or both, either concurrently or selectively. Modules of more than one modem program can be swapped in and out of DSP memory space. Common modem code can be run on either a host processor or on a DSP using respective command libraries.

Abstract: According to an embodiment of the invention, a modem provides functionality for audio processing and for implementing a modem. A digital signal processor is connected to one or more audio codecs to interface with an analog audio channel, and is connected to one or more modem codecs and a data access arrangement to interface with a communications channel.

Abstract: A plurality of modems or modem types can run on a host processor, a digital signal processor or both, either concurrently or selectively. Modules of more than one modem program can be swapped in and out of DSP memory space. Common modem code can be run on either a host processor or on a DSP using respective command libraries.

Abstract: A modem interface communicates data between a computer and a modem that is coupled to an external communication network. The modem interface includes a host interface for coupling to a host processor of the computer, an analog interface for coupling to the modem, and a digital signal processor for processing the data communicated with the modem and the host processor. A memory is coupled to the host interface, the digital signal processor and the analog interface. The analog interface provides clock signals and converts data between analog and digital for communicating between the memory and the modem. The analog interface provides an interrupt to the digital signal processor to control the transfer of data from the digital signal processor and the memory. The modem interface processes data at sampling rates while the host processor processes data at rates less than the sampling rate of the analog interface.

Abstract: A modem interface communicates data between a computer and a modem that is coupled to an external communication network. The modem interface includes a host interface for coupling to a host processor of the computer, an analog interface for coupling to the modem, and a digital signal processor for processing the data communicated with the modem and the host processor. A memory is coupled to the host interface, the digital signal processor and the analog interface. The analog interface provides clock signals and converts data between analog and digital for communicating between the memory and the modem. The analog interface provides an interrupt to the digital signal processor to control the transfer of data from the digital signal processor and the memory. The modem interface processes data at sampling rates while the host processor processes data at rates less than the sampling rate of the analog interface.

Abstract: A modem interface unit is provided for coupling a communications modem to a host processor. The modem interface unit includes a host interface for coupling to a host processor, an anlog interface for coupling to a communications modem and a digital signal processor for performing signal processing operations on modem signals as they are transferred from the host interface to the analog interface and vice versa. A memory is provided for use in moving the modem signals through the interface unit. A sleep mode mechanism is provided for discontinuing the supplying of operating current to the digital signal processor when no modem signals have been transmitted or received for a predetermined period of time.

Abstract: A modem interface communicates data between a computer and a modem that is coupled to an external communication network. The modem interface includes a host interface for coupling to a host processor of the computer, an analog interface for coupling to the modem, and a digital signal processor for processing the data communicated with the modem and the host processor. A memory is coupled to the host interface, the digital signal processor and the analog interface. The analog interface provides clock signals and converts data between analog and digital for communicating between the memory and the modem. The analog interface provides an interrupt to the digital signal processor to control the transfer of data from the digital signal processor and the memory. The modem interface processes data at sampling rates while the host processor processes data at rates less than the sampling rate of the analog interface.