Simultaneous voice and data system using the existing two-wire inter-face

• US 5,214,650 A
• Filed: 11/19/1990
• Issued: 05/25/1993
• Est. Priority Date: 11/19/1990
• Status: Expired due to Term

• Current Assignee: AG Communication Systems Corp. (Nokia Corporation)
• Original Assignee: AG Communication Systems Corp. (Nokia Corporation)
• Inventors: Young, John S., Renner, Robert E., Kem, Han, Hu, Kuang-Cheng
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Kizou, Hassan
• Application Number:
  US07/615,679
• Time in Patent Office: 918 Days
• Field of Search: 370/110.1, 370/110.2, 370/110.3, 370/112, 370/77, 370/24, 370/33, 370/34, 370/36, 370/37, 379/93
• US Class Current: 370/276
• CPC Class Codes: H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
• CPC Class Codes: H04Q 11/0428 Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
• CPC Class Codes: H04Q 2213/09 Subscriber related equipment; Analog terminal
• CPC Class Codes: H04Q 2213/174 Data transmission
• CPC Class Codes: H04Q 2213/175 Other signals
• CPC Class Codes: H04Q 2213/292 Time (de)multiplexing
• CPC Class Codes: H04Q 2213/297 Coupling circuits between different (rate) TDM systems
• CPC Class Codes: H04Q 2213/405 Voice frequency current used for digit selection
• CPC Class Codes: Y10S 370/914 Rate converter

Abstract

A data adapter for simultaneously providing a low speed channel, a first high speed data channel, and a second high speed channel over a two wire connection; the two wire connection connects the data adapter to a telephone system. The data adapter includes a line transceiver connected to the two-wire connection, the line interface provides a full duplex transmission link with the telephone system over the two-wire connection. A telephone interface converts data between the first high speed channel and a telephone instrument. A rate adapter converts data between the second high speed channel and a data processing equipment. A protocol controller performs a packet protocol on the low speed channel, and routes the first high speed channel to the telephone interface and the second high speed channel to the rate adapter. A processor that receives and transmits messages through the protocol controller over the low speed channel to the telephone system, and in response to information received over the low speed channel, alternatively information received from the rate adapter, the processor controls the data adapter.

Claims

1. A data adapter for simultaneously providing a low speed channel, a first high speed channel, and a second high speed channel over a two wire connection, said two wire connection connects said data adapter to a telephone system, said data adapter comprising:

a line transceiver means connected to said two-wire connection, said line transceiver means provides a full duplex transmission link with said telephone system over said two-wire connection, said full duplex transmission link comprised of said low speed channel, said first high speed channel, and said second high speed channel;

a protocol controller means connected to said line transceiver means, said protocol controller means performs a packet protocol on said low speed channel and, said protocol controller means routes said first high speed channel to a telephone interface means and said second high speed channel to a rate adapter means;

said telephone interface means connected to said protocol controller means, said telephone interface means converts data between said first high speed channel and a telephone instrument;

said rate adapter means connected to said protocol controller means, said rate adapter means converts data between said second high speed channel and a data processing equipment, said rate adapter means performs a rate adaption protocol while converting said data between said second high speed channel and said data processing equipment, said rate adapter means including a signal processor means arranged to perform said rate adaption protocol; and

a processor means connected to said line transceiver means, said protocol controller means, said telephone interface means, and said rate adapter means, said processor means arranged to receive and transmit messages through said protocol controller means over said low speed channel to said telephone system, and in response to information received over said low speed channel, and information received from said rate adapter means, said processor means controls said data adapter.

2. A data adapter as claimed in claim 1, said data adapter further comprising:

a tone generator means connected to said protocol controller means, said tone generator means creates sounds used to convey information; and

a speaker arranged to make said sounds from said tone generator means audible.

3. A data adapter as claimed in claim 1, said data adapter further comprising:

a display means connected to said processor means, said display means arranged to convey visual information;

a keyboard means connected to said processor means, said keyboard means arranged to allow information to be entered.

4. A data adapter for simultaneously providing a low speed channel, a first high speed channel, and a second high speed channel over a two wire connection, said two wire connection connects said data adapter to a telephone system, said data adapter comprising:

a line transceiver means connected to said two-wire connection, said line transceiver means provides a full duplex transmission link with said telephone system over said two-wire connection, said full duplex transmission link comprised of said low speed channel, said first high speed channel, and said second high speed channel;

a protocol controller means connected to said line transceiver means, said protocol controller means performs a packet protocol on said low speed channel and, said protocol controller means routes said first high speed channel to a telephone interface means and said second high speed channel to a rate adapter means;

said telephone interface means connected to said protocol controller means, said telephone interface means converts data between said first high speed channel and a telephone instrument;

said rate adapter means connected to said protocol controller means, said rate adapter means converts data between said second high speed channel and a data processing equipment, said rate adapter means performs a rate adaption protocol while converting said data between said second high speed channel and said data processing equipment, said rate adapter means including a signal processor means arranged to perform said rate adaption protocol, said rate adapter means including a Read Only Memory (ROM) means for storing a rate adaption protocol program used by said signal processor means, and a Random Access Memory means used by said signal processor means for temporary storage; and

a processor means connected to said line transceiver means, said protocol controller means, said telephone interface means, and said rate adapter means, said processor means arranged to receive and transmit messages through said protocol controller means over said low speed channel to said telephone system, and in response to information received over said low speed channel, and information received from said rate adapter means, said processor means controls said data adapter.

5. A data adapter as claimed in claim 4, said rate adapter means further comprising:

a first serial transceiver means connected between said signal processor means and said data processing equipment, said first serial transceiver means converts data between said signal processor means and said data processing equipment;

a parallel to serial converter means connected to said signal processor means, said parallel to serial converter means accepts parallel data from said signal processor means and converts said parallel data to serial data; and

a second serial transceiver means connected between said signal processor means and said parallel to serial converter means, said second serial transceiver means arranged to receive said serial data and extract a complete data byte from said serial data, said complete data byte is then converted to a parallel format and transmitted to said signal processor.

6. A data adapter as claimed in claim 4, said rate adapter means further comprising an interchange circuit means connected to said signal processor means, said interchange circuit means monitors a first plurality of signals between said data adapter and said data processing equipment and generates a second plurality of signals between said data adapter and said data processing equipment, where said first plurality of signals and said second plurality of signals indicate whether data can be exchanged between said data adapter and said data processing equipment.

7. A data adapter as claimed in claim 4, said rate adapter means further comprising:

a transmit First-In-First-Out (FIFO) means arranged to transmit data from said signal processor means over said second high speed channel; and

a receive FIFO means arranged to receive data from said second high speed channel and send said received data to said signal processor means.

8. A data adapter as claimed in claim 4, said telephone interface means further comprising:

a combo means for converting a received analog signal to a transmitted digital signal, and converting a received digital signal to a transmitted analog signal, said combo means receives said received analog signal and transmits said transmitted analog signal to said telephone instrument, said combo means is further arranged to communicate with said processor means;

a Dual Tone Multi-Frequency (DTMF) receiver for detecting and decoding a received pair of tones, said DTMF received receives said pair of tones from said telephone instrument and transmits said decoding to said processor means;

a serial-to-serial converter means for converting said transmitted digital signal to said first high speed channel and converting said first high speed channel to said received digital signal; and

a clock generator means for generating a plurality of signals used by said serial-to-serial converter means.

9. A data adapter for simultaneously providing a low speed channel, a first high speed channel, and a second high speed channel over a two wire connection, said two wire connection connects said data adapter to a telephone system, said first high speed channel carries a digitized analog signal from, and to, a telephone instrument and said second high speed channel carries data from, and to, a data processing equipment, said data adapter comprising:

a line transceiver means connected to said two-wire connection, said line transceiver means provides a full duplex transmission link with said telephone system over said two-wire connection, said full duplex transmission link comprised of said low speed channel, said first high speed channel, and said second high speed channel;

a control interface means connected to said line transceiver means, said control interface means arranged to provide a communications channel to said line transceiver;

a protocol controller means connected to said line transceiver means, said protocol controller means performs a packet protocol on said low speed channel and, said protocol controller means routes said first high speed channel to a telephone interface means and said second high speed channel to a signal processor means;

said telephone interface means connected to said protocol controller means, said telephone interface means converts data between said first high speed channel and said telephone instrument;

said signal processor means connected to said protocol controller means, said signal processor means arranged to perform a rate adaption protocol on said second high speed channel and said data from, and to, said data processing equipment;

a first serial transceiver means connected between said signal processor means and said data processing equipment, said first serial transceiver means converts data between said signal processor means and said data processing equipment;

a parallel to serial converter means connected to said signal processor means, said parallel to serial converter means accepts parallel data from said signal processor means and converts said parallel data to serial data;

a second serial transceiver means connected between said signal processor means and said parallel to serial converter means, said second serial transceiver means arranged to receive said serial data and extract a complete data byte from said serial data, said complete data byte is then converted to a parallel format and transmitted to said signal processor;

an interprocessor interface means connected to said signal processor means, said interprocessor interface means arranged to provide a communication channel to said signal processor means; and

a processor means connected to said control interface means, said protocol controller means, said telephone interface means, and said interprocessor interface means, said processor means arranged to receive and transmit messages through said protocol controller means over said low speed channel to said telephone system, and in response to information received over said low speed channel, and information received from said signal processor means through said interprocessor means, said processor means controls said data adapter, said processor means controls said line transceiver means through said control interface means.

10. A data adapter as claimed in claim 9, said data adapter further comprising:

a tone generator means connected to said protocol controller means, said tone generator means creates sounds used to convey information; and

a speaker arranged to make said sounds from said tone generator means audible.

11. A data adapter as claimed in claim 9, said data adapter further comprising:

a display means connected to said processor means, said display means arranged to convey visual information;

a keyboard means connected to said processor means, said keyboard means arranged to allow information to be

12. A data adapter as claimed in claim 9, said data adapter further comprising:

a transmit First-In-First-Out (FIFO) means arranged to transmit data from said signal processor means over said second high speed channel; and

a receive FIFO means arranged to receive data from said second high speed channel and send said received data to said signal processor means.

13. A data adapter as claimed in claim 9, said telephone interface means further comprising:

a combo means for converting a received analog signal to a transmitted digital signal, and converting a received digital signal to a transmitted analog signal, said combo means receives said received analog signal and transmits said transmitted analog signal to said telephone instrument, said combo means is further arranged to communicate with said processor means;

a Dual Tone Multi-Frequency (DTMF) receiver for detecting and decoding a received pair of tones, said DTMF receiver receives said pair of tones from said telephone instrument and transmits said decoding to said processor means;

a serial-to-serial converter means for converting said transmitted digital signal to said digitized analog signal and converting said digitized analog signal to said received digital signal; and

a clock generator means for generating a plurality of signals used by said serial-to-serial converter means.