Method and apparatus for transmission of data and voice

• US 5,793,843 A
• Filed: 09/28/1994
• Issued: 08/11/1998
• Est. Priority Date: 10/31/1989
• Status: Expired due to Term

• Current Assignee: Frances E. Morris
• Original Assignee: Intelligence Yochu (Guangzhou) Technology Co., Ltd
• Inventors: Morris, Walker C.
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): Shankar, Vijay
• Application Number:
  US08/314,533
• Time in Patent Office: 1,413 Days
• Field of Search: 379/58, 379/59, 379/61, 379/93, 379/97, 379/98, 379/100, 379/420, 370/94.1, 370/94.2, 370/91, 370/95.1, 370/100.1, 455/33.1, 455/54.1
• US Class Current: 455/422.1
• CPC Class Codes: H04B 7/18567 Arrangements for providing additional services to the basic mobile satellite telephony service
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A modem-controller for auto switching and controlling the transmission and receiving of voice and error-free transmission of standard data signals, fax data signals and voice communications over telephone line service, radio frequency networks, satellite systems, as well as cellular telephone systems includes analog switches that receive control signals from the micro-controller for controlling and switching the audio or data path of an internal voice board and the analog signals from a modem to and from a radio frequency transceiver via a radio frequency transceiver interface/logic board, a cellular telephone transceiver via a cellular telephone transceiver interface, a telephone landline via a data access arrangement (DAA), a satellite system via a telephone landline through the DAA. A method selects the DAA which either connects to the telephone line, the satellite system or the cellular telephone, and another method bypasses the DAA, selects and controls radio frequency telemetry modules or packet radios. The operation of the modem-controller is divided into three modes comprising a command mode, a data mode and an escape mode. The software is a set of data communication protocols which provide error-free communication of data and define a file transfer protocol at the application layer, the session protocol and the link protocol.

Claims

1. An apparatus for transmitting data signals over a telephone landline or a cellular telephone system and for transmitting voice signals over the telephone landline or the cellular telephone system, comprising:

a modem for converting received digital signals to analog signals and for converting received analog signals to digital signals;

a data access arrangement operatively connected to said modem and including means to operatively connect to the telephone landline;

a microcontroller operatively connected to said modem;

a read-only memory operatively connected to said microcontroller;

protocol software in said read-only memory in the form of firmware for controlling the operation of the apparatus;

a cellular telephone interface for connecting said microcontroller to a control unit and a transceiver unit of the cellular telephone;

means for providing voice communications over the telephone landline or the cellular telephone system;

a first analog switch for receiving input firm said means for providing voice communications and providing outputs to said data access arrangement and said transceiver unit of said cellular telephone;

a second analog switch for receiving input from said control unit of said cellular telephone and providing outputs to said data access arrangement and said transceiver unit of said cellular telephone;

a third analog switch for receiving input from said modem and providing outputs to said data access arrangement and said transceiver unit of said cellular telephone; and

means to connect data terminal equipment to said microcontroller through an interface.

2. The modem-controller of claim 1 wherein said protocol software includes means for retrying the connection phase for a total of six tries.

3. The modem-controller of claim 2 wherein said protocol software includes means for retransmitting data packets, after successful connection phase, for a total of eighteen tries.

4. The apparatus of claim 3 wherein said protocol software includes means to suspend transmission from the modem to wait for the recovery of loss of carrier.

5. The apparatus of claim 4 wherein said protocol software includes means to switch the mode of operation of said modem from synchronous to asynchronous if carrier loss occurs during transmission in the synchronous mode of operation and to switch back to the synchronous mode upon recovery of the carrier.

6. An apparatus for transmission of data signals over a telephone landline, a wireless radio frequency network or a cellular telephone system and for transmitting voice signals over the telephone landline, the wireless radio frequency network or a cellular telephone system, comprising:

a modem for converting received digital signals to analog signals and for converting received analog to digital signals;

a data access arrangement operatively connected to said modem and including a means to operatively connect to the telephone landline;

a microcontroller operatively connected to said modem;

a read-only memory operatively connected to said microcontroller;

protocol software in said read-only memory in the form of firmware for controlling the operation of the apparatus;

a cellular telephone interface for connecting said microcontroller to a cellular telephone transceiver unit;

a radio frequency interface/logic for connecting said microcontroller to a radio frequency transceiver unit;

means for providing voice communication using a microphone and speaker over a telephone landline, a wireless radio frequency network or a cellular telephone system;

a plurality of analog switches for operatively connecting said means for providing voice communications, said radio frequency transceiver, said cellular telephone to said data access arrangement; and

means to connect data terminal equipment to said microcontroller through an interface.

7. The apparatus of claim 6 wherein said protocol software includes means for retrying the connection phase for a total of six tries.

8. The apparatus of claim 7 wherein said protocol software includes means for retransmitting data packets, after successful connection phase, for a total of eighteen tries.

9. The apparatus of claim 8 wherein said protocol software includes means to suspend transmission from the modem to wait for the recovery of loss of carrier.

10. The apparatus of claim 9 wherein said protocol software includes means to switch the mode of operation of said modem from synchronous to asynchronous if carrier loss occurs during transmission in the synchronous mode of operation and to switch back to the synchronous mode upon recovery of the carrier.

11. An apparatus for transmission of data signals over ordinary telephone line service, radio frequency network or a cellular telephone system and for transmitting voice signals over the telephone line service, the radio frequency network and the cellular telephone system, comprising:

a modem for converting received digital signals to analog signals and for converting received analog to digital signals;

a data access arrangement operatively connected to said modem and including a means to operatively connect to a telephone line;

a microcontroller operatively connected to said modem;

a read-only memory operatively connected to said microcontroller;

protocol software in said read-only memory in the form of firmware for controlling the operation of the apparatus;

a cellular telephone interface for connecting said microcontroller to a cellular telephone unit;

radio frequency interface/logic for connecting said microcontroller to radio frequency telemetry modules or packet radios;

means for providing voice communication using a microphone and speaker over the telephone line, the wireless radio frequency network or the cellular telephone system;

a plurality of analog switches for receiving inputs from said means for providing voice communications, said radio frequency telemetry modules or packet radios, said cellular telephone, said data access arrangement and said modem and providing outputs to said modem, said data access arrangement, said radio frequency telemetry modules or packet radios, and said cellular telephone; and

means to connect data terminal equipment to said microcontroller through an interface.

12. The modem-controller of claim 11 wherein said protocol software includes means for retrying the connection phase for a total of six tries.

13. The modem-controller of claim 12 wherein said protocol software includes means for retransmitting data packets, after successful connection phase, for a total of eighteen tries.

14. The apparatus of claim 13 wherein said protocol software includes means to suspend transmission from the modem to wait for the recovery of loss of carrier.

15. The apparatus of claim 14 wherein said protocol software includes means to switch the mode of operation of said modem from synchronous to asynchronous if carrier loss occurs during transmission in the synchronous mode of operation and to switch back to the synchronous mode upon recovery of the carrier.

21. The apparatus of claim 11 wherein the plurality of analog switches comprises in combination:

a first analog switch for receiving input from said means for providing voice communications or said modem and providing outputs to second analog switch;

a second analog switch for receiving input from first analog switch and providing outputs to said data access arrangement or radio frequency interface/logic;

a third analog switch for receiving input from said data access arrangement and providing outputs to said cellular telephone interface to said cellular telephone;

a fourth analog switch for receiving input from said data access arrangement and providing outputs to said telephone line; and

a fifth analog switch for receiving input from telephone line and providing outputs to said cellular telephone interface to said cellular telephone.

16. An apparatus for transmission of standard or fax data signals over ordinary telephone line service, radio frequency network, satellite system or a cellular telephone system and for transmitting voice signals over the telephone line service, the radio frequency network, the satellite system and the cellular telephone system, comprising:

a modem for converting received digital signals to analog signals and for converting received analog to digital signals;

a data access arrangement operatively connected to said modem and including a means for operatively connecting to a telephone line;

a microcontroller operatively connected to said modem;

a read-only memory operatively connected to said microcontroller;

protocol software in said read-only memory in the form of firmware for controlling the operation of the apparatus;

a cellular telephone interface for connecting said microcontroller to a cellular telephone unit;

a radio frequency interface for connecting said microcontroller to a radio frequency telemetry module or packet radio unit;

means for providing voice communication using a microphone and speaker over the telephone line, the wireless radio frequency network, the satellite system or the cellular telephone system;

a plurality of analog switches controlled by said microprocessor to control input and output of said means for providing voice communications or said modem to said radio frequency interface and to said data access arrangement to said cellular telephone means, said satellite system and a remote device or infrared transceiver.

17. The modem-controller of claim 16 wherein said protocol software includes means for retrying the connection phase for a total of six tries.

18. The modem-controller of claim 17 wherein said protocol software includes means for retransmitting data packets, after successful connection phase, for a total of eighteen tries.

19. The apparatus of claim 18 wherein said protocol software includes means to suspend transmission from the modem to wait for the recovery of loss of carrier.

20. The apparatus of claim 19 wherein said protocol software includes means to switch the mode of operation of said modem from synchronous to asynchronous if carrier loss occurs during transmission in the synchronous mode of operation and to switch back to the synchronous mode upon recovery of the carrier.

22. The apparatus of claim 16 wherein the plurality of analog switches comprises in combination:

a first analog switch for receiving input from said microcontroller to control signal path from said means for providing voice communications or said modem to said radio frequency or said data access arrangement;

a second analog switch for receiving input from said microcontroller to control signal path from said first analog switch to said radio frequency interface or said data access arrangement;

a third analog switch for receiving input from said microcontroller to control signal path from said data access arrangement to said cellular telephone interface to said cellular telephone;

a fourth analog switch for receiving input from said microcontroller to control signal path from said data access arrangement to said remote device or infrared transceiver through said telephone line or to said satellite system; and

a fifth analog switch for receiving input from said microcontroller to control signal path from said remote device or infrared transceiver via said telephone line connected to said cellular telephone interface to said cellular telephone.