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US5978688A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus and method for protocol interface

Assignee: Microsemi Semiconductor US Inc
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Filing: 1996-10-04
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Granted: 1999-11-02
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Expires: 2016-10-04
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Abstract

Abstract A telephone for digital cordless telecommunications includes a frame formatter for logical channel formatting of transmitted baseband signals and received baseband signals. The telephone comprises a radio interface connection with the frame formatter, a FIFO/codec interface conductively coupled to the frame formatter, an interrupt interface conductively coupled to the frame formatter, a data control logic interface conductively coupled to the frame formatter, and a microcontroller interface conductively coupled to the frame formatter.

Inventors

  • 👤 Jacqueline Mullins
  • 👤 Paul Schnizlein
  • 👤 Alan Hendrickson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 23:45
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/72; H04M1/725; H04M1/733

Claims Analysis

Total Claims: 22
Claim 1
Independent Claim 185 words
An integrated circuit for use in a digital cordless telephone, the telephone including a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the integrated circuit further comprising: a. an RF interface with said frame formatter comprising transmit and receive lines; b. a FIFO/codec interface with said frame formatter for synchronizing data transfer between the frame formatter and an audio front end circuitry; c. a data control logic circuitry interface for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; d. an interrupt controller interface for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; and e. a microcontroller interface for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 2
Dependent Claim 185 words
An integrated circuit for use in a digital cordless telephone, the telephone including a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the integrated circuit further comprising: a. an RF interface with said frame formatter comprising transmit and receive lines; b. a FIFO/codec interface with said frame formatter for synchronizing data transfer between the frame formatter and an audio front end circuitry; c. a data control logic circuitry interface for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; d. an interrupt controller interface for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; and e. a microcontroller interface for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 3
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; and interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 4
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; and interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 5
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively.
Claim 6
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively.
Claim 7
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry.
Claim 8
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry.
Claim 9
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 10
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 11
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit.
Claim 12
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit.
Claim 13
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; and interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 14
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; and interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 15
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 16
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 17
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit.
Claim 18
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit.
Claim 19
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; and interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 20
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit; and interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter.
Claim 21
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit.
Claim 22
Independent Claim 209 words
A method of communication, the method using an integrated circuit within a digital cordless telecommunications system comprising a base unit and a hand unit, the integrated circuit including a frame formatter for logical channel formatting of RF signals in a format comprising a transparent voice B-channel, an error-controlled, packetized control D-channel, and a framing synchronization SYN-channel, and further having connected to the frame formatter, a FIFO/codec, data control logic circuitry, an interrupt controller, and a microcontroller, the method including formatting a transmitted baseband signal and a received baseband signal, the method comprising the steps of: interfacing with an RF transmitter and receiver, for delivery and reception of the transmitted baseband signal and the received baseband signal, respectively; interfacing with the FIFO/codec interface for synchronizing data transfer between the frame formatter and an audio front end circuitry; interfacing with the microcontroller for programming registers that enable and control the B-channel, D-channel, and the SYN-channel of the frame formatter; interfacing with the interrupt controller for receiving status bits and interrupt signals related to the B-channel, D-channel, and the SYN-channel of the frame formatter; and interfacing with the data control logic circuitry for transmitting and receiving data control messages associated with a telecommunications link between the base unit and the hand unit.

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