Four wire modem signal switching for voice and data applications

• US 5,602,902 A
• Filed: 03/24/1995
• Issued: 02/11/1997
• Est. Priority Date: 03/24/1995
• Status: Expired due to Term

• Current Assignee: Micron Technology, Inc.
• Original Assignee: Intel Corporation
• Inventors: Satterlund, Nels E., Lewis, Glenn M.
• Primary Examiner(s): Bost, Dwayne D.
• Application Number:
  US08/410,212
• Time in Patent Office: 690 Days
• Field of Search: 379/58, 379/59, 379/93, 379/96, 379/98, 375/222
• US Class Current: 455/552.1
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

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.

Claims

1. A switching multi-mode modem comprising:

a DAA having a two-wire side and a four-wire side, said two-wire side being connected to a land based telephone network;

a first DSP capable of performing all modem digital signal processing functions;

a second DSP capable of performing conversion and compression of analog voice signals to digital signals;

a headset connector;

a cellular telephone connector;

a switching network connected between said first DSP, said second DSP, said four-wire side of said DAA, said cellular telephone and said headset; and

a microprocessor means communicating with said first DSP and said second DSP and said switching network, said microprocessor means being adapted to separate audio signals from data signals and to cause said switching network to switch into states that configure said modem to operate a plurality of separate modes.

2. The switching multi-mode modem system of claim 1 wherein one of said modes is Radish data.

3. The switching multi-mode modem system of claim 1 wherein one of said modes is Radish voice.

4. The switching multi-mode modem system of claim 1 wherein one of said modes is simultaneous voice and data.

5. The switching multi-mode modem system of claim 1 wherein one of said modes is cellular telephone.

6. The switching multi-mode modem system of claim 1 wherein one of said modes is business/audio.

7. The switching multi-mode modem system of claim 1, wherein said microprocessor means resides in a host computer to which said modem is attached.

8. The switching multi-mode modem system of claim 1, wherein said microprocessor means consists of a microprocessor located in said modem.

9. A switching multi-mode modem comprising:

a DAA having a two-wire side with an input and output and a four-wire side with an input and output, said input and output on said two-wire side being connected to a land based telephone network;

a first DSP having an input and output and capable of performing all modem digital signal processing functions;

a second DSP having an input and output and capable of performing conversion of analog voice signals to digital signals and compression of said digital voice signals;

a headset having an input and output;

a cellular telephone having an input and output;

a first switch having a base terminal connected to said input of said first digital signal processor and mutually exclusively connectable to three switchable terminals, said first switchable terminal being connected to said output of said cellular telephone, said second switchable terminal being connected to said output of said four wire side of said DAA, and said third switchable terminal being connected to said output of said headset;

a second switch having a base terminal connected to said input of said four wire side of said DAA and mutually exclusively connectable to three switchable terminals, said first switchable terminal being connected to said output of said first digital signal processor, said second switchable terminal being off for said second switch and said third switchable terminal being connected to said output of said headset;

a third switch having a base terminal connected to said input of said headset and mutually exclusively connectable to three switchable terminals, said first switchable terminal being connected to said output of said first digital signal processor, said second switchable terminal being connected to said output of said second digital signal processor, and said third switchable terminal being connected to said input of said vase terminal of said first switch;

a fourth switch having a base terminal connected to said input of said cellular telephone and mutually exclusively connectable to three switchable terminals, said first switchable terminal being connected to said output of said headset and said second terminal of said second switch, said second switchable terminal being off for said fourth switch and said third switchable terminal being connected to said output of said first digital signal processor, to said first terminal of said second switch and to said first terminal of said third switch; and

microprocessor means communicating with said first DSP and said second DSP and to said first, second, third and fourth switches, said microcontroller being adapted to separate audio signals from data signals and to cause said first, said second, said third, and said fourth switches to switch into states that configure said modem to operate in a 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.

10. The switching multi-mode modem system of claim 9 wherein said microprocessor means resides in a host computer to which said modem is attached.

11. The switching multi-mode modem system of claim 9 wherein said microprocessor means consists of a microprocessor located in said modem.

12. The switching multi-mode modem system of claim 9 wherein the states of said switches as follows:

are required to achieve said Radish voice mode, or a Radish data mode, or a cellular telephone mode, or a business/audio mode or a digital simulataneous voice and data mode upon command from said microcontroller.