Connector assembly for a radio telephone and a computer

• US 5,657,371 A
• Filed: 08/26/1996
• Issued: 08/12/1997
• Est. Priority Date: 02/01/1993
• Status: Expired due to Fees

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Nokia Mobile Phones UK Limited (Nokia Corporation)
• Inventors: Terho, Mikko, Suomi, Arto
• Primary Examiner(s): Coles, Sr., Edward L.
• Assistant Examiner(s): Williams, Kimberly A.
• Application Number:
  US08/702,861
• Time in Patent Office: 351 Days
• Field of Search: 379/58, 379/59, 379/93, 379/98
• US Class Current: 455/418
• CPC Class Codes: H04M 1/72409 by interfacing with external accessories hands-free H04M1/60
• CPC Class Codes: H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Abstract

In the connection between a radio telephone and a computer, the functions are divided substantially into two parts: adaptation of the levels of the interface connection wires is handled by the circuits of the cradle (2) of the radio telephone (1), and the control logic is disposed in the communications software (SW) of the computer (3). Physically, the interface comprises an RS232 interface (5) for the control and a two-wire PSTN line (6) between the modem (4) and the telephone.

Claims

1. A system for connection of a radiotelephone to a computer, the system comprising:

a radiotelephone and a computer;

a modem connecting with the computer for providing communication with the computer via audio signals;

an adapter connecting with the radiotelephone;

a first communication cable interconnecting directly between the adapter and the modem for communication of the audio signals between the radiotelephone and the modem;

a second communication cable interconnecting directly between the adapter and the computer for communication of telephonic control signals between the radiotelephone and the computer;

wherein the adapter adapts signal levels of the first cable and of the second cable for matching with signal levels of the radiotelephone thereby enabling communication of the audio signals via the first cable and communication of the telephonic control signals via the second cable;

wherein the computer has a communications program, a first part of the communications program serving to control transmission of the audio signals via the modem over the first cable, and a second part of the communications program generating a portion of the control signals transmitted via the second cable to control operation of the telephone; and

the control signal generated by the computer in response to the second part of the communication program provides for set up and answering of calls at the radiotelephone.

2. An system as set forth in claim 1 wherein the radio telephone comprises an internal control bus, and wherein the radio telephone adapter comprises level controlling circuits for audio signal, including an interface matching circuit, for adjusting a level to a value employed by the internal control bus.

3. An assembly as set forth in claim 1, wherein the computer is a portable personal computer.

4. A system as set forth in claim 1, wherein the radio telephone is a portable phone operable for a cellular network.

5. A system as set forth in claim 1, wherein the modem is an internal modem connected to the computer'"'"'s parallel port.

6. A system as set forth in claim 1, wherein the computer has a serial port interface which is an RS232 interface.

7. A system as set forth in claim 1, wherein the modem is a fax modem.

8. A system as set forth in claim 1, wherein the radio telephone adapter is disposed within a radio telephone housing.