Enhanced dual mode telephone for internet telephony

• US 6,614,786 B1
• Filed: 11/24/1999
• Issued: 09/02/2003
• Est. Priority Date: 11/24/1999
• Status: Expired due to Term

• Current Assignee: Wi-LAN Inc.
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Byers, Charles C.
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Qureshi, Afsar M.
• Application Number:
  US09/448,740
• Time in Patent Office: 1,378 Days
• Field of Search: 379/93.09, 379/112.05, 379/221.12, 379/93.01, 379/93.11, 379/93.26, 379/93.27, 379/88.03, 370/352, 370/493, 370/494, 370/495, 370/353, 455/445, 455/466, 455/3.01
• US Class Current: 370/353
• CPC Class Codes: H04M 1/2535 adapted for voice communication over an Internet Protocol [IP] network Voice over Internet Protocol (VoIP) network equipment and services H04M7/006; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04M 1/27 Devices whereby a plurality of signals may be stored simultaneously
• CPC Class Codes: H04M 1/57 Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set at the operator set in a manual exchange H04M5/20

Abstract

A dual mode Internet telephone is capable of operating as a tone/pulse dial telephone as well as with the Internet by transmitting dual-tone multi-frequency (DTMF) tones in response to dialing. The dual mode telephone includes a mode control switch which is either manually selectable to permit a user to choose between making a call over a standard telephone network or over the Internet or is automatically controlled to route the call via the more advantageous communications link depending upon various factors and considerations. In the standard telephone mode of operation, most of the Internet telephony circuit is disabled and the dial/touchtone keypad, earpiece and mouthpiece, and ringer are connected to the telephone line. In the Internet mode of operation, dialed digits are stored and converted to Internet telephony call set-up messages. The signals to/from the earpiece and mouthpiece are digitized, compressed and packetized by a digital signal processor. A built-in modem connects the digital signal processor and the call control messages through the standard telephone line to the Internet Service Provider (ISP). A control processor manages the connections and drives the keypad and ringer. A non-volatile memory stores configuration data such as the ISP number(s) to call and various other features related to the Internet mode of operation. The memory can also be programmed with other operating parameters for use by the control processor in an automatic mode of operation to override the manual switch and automatically place or receive a call via either the standard telephone network or the Internet.

Claims

1. A dual mode telephone including a ringer circuit, an earpiece, a mouthpiece and an alphanumeric character selector for use with a telephone network in a first mode of operation or with a global information network in a second mode of operation, said dual mode telephone comprising:

a configuration memory storing first data for said first mode of operation and second data for said second mode of operation;

a control processor coupled to said configuration memory and to said alphanumeric character selector and responsive to user-initiated inputs to said alphanumeric character selector for reading either said first data or said second data from said configuration memory in accordance with said user initiated inputs;

an analog signal circuit coupled to the earpiece and mouthpiece for use in the first mode of operation;

a digital signal circuit coupled to the earpiece and mouthpiece for use in the second mode of operation; and

a mode control switch coupled to said control processor and responsive to a manual user selection for connecting the analog signal circuit to the telephone network for use in the first mode of operation or for connecting the digital signal circuit to the global information network in the second mode of operation, wherein said mode control switch is further coupled to said control processor for automatically connecting said analog signal circuit to the telephone network or said digital signal circuit to the global information network in accordance with said first or second data read from said configuration memory by said control processor.

2. The dual mode telephone of claim 1 wherein said configuration memory stores either said first data for said first mode of operation or said second data for said second mode of operation for a given called number.

3. The dual mode telephone of claim 2 wherein said user-initiated inputs are defined in terms of various operating parameters.

4. The dual mode telephone of claim 3 wherein said various operating parameters include a called number, a time of day, a day of the week, or an area code.

5. The dual mode telephone of claim 4 wherein said dual mode telephone is connected to the global information network by a global information network provider, and wherein a directory number associated with said global network provider is stored in and read from said configuration memory by said control processor.

6. The dual mode telephone of claim 5 further comprising plural information network providers for connecting the dual mode telephone to the global information network, and wherein plural alternate directory numbers each associated with a respective global network provider are stored in and read from said configuration memory by said control processor.

7. The dual mode telephone of claim 1 wherein said analog signal processor includes a hybrid circuit having a low voltage transformer.

8. The dual mode telephone of claim 1 wherein said digital signal circuit includes a modem for connecting the earpiece and mouthpiece to the global information network via the telephone network and said mode control switch.

9. The dual mode telephone of claim 8 wherein said digital signal circuit further includes a digital signal processor for compressing signals provided by the mouthpiece to said modem and for decompressing signals provided from said modem to the earpiece.

10. The dual mode telephone of claim 9 wherein said digital signal processor decrypts signals provided by said modem to the earpiece and encrypts signals provided from the mouthpiece to said modem.

11. The dual mode telephone of claim 10 wherein said digital signal circuit further includes a coder/decoder for decoding signals provided by said modem to the earpiece and for encoding signals provided from the mouthpiece to said modem.

12. The dual mode telephone of claim 1 wherein said mode control switch comprises a relay with first and second sets of contacts, and wherein said first set of contacts are closed in said first mode of operation and open in said second mode of operation and said second set of contacts are open in said first mode of operation and are closed in said second mode of operation.

13. The dual mode telephone of claim 12 wherein said first set of contacts are closed in said first mode of operation upon a loss of power to the dual mode telephone for use with the telephone network.

14. The dual mode telephone of claim 1 further comprising first and second control buttons coupled to said control processor for operating with the telephone network upon selection of said first control button or for operating with the global information network upon selection of said second control button.

15. The dual mode telephone of claim 1 wherein said configuration memory is a nonvolatile memory.

16. The dual mode telephone of claim 1 wherein a distinctive ringing signal is provided to the dual mode telephone to identify a call received via the global information network.

17. A method for communicating via either a telephone network or a global information network, said method comprising the steps of:

storing first and second data in a memory for respectively communicating either via the telephone network or via the global information network, wherein communication is established via either the telephone network by said first data or the global information network by said second data in accordance with various operating parameters;

manually selecting to communicate via either the telephone network or the global information network;

or

in the absence of a manual selection to communicate via either the telephone network or the global information network, reading either said first or said second data from said memory depending upon said various operating parameters; and

communicating by the telephone network if said first data is read from said memory or by the global information network if said second data is read from said memory.

18. The method of claim 17 wherein the step of manually selecting to communicate via either the telephone network or the global information network includes providing user-initiated inputs defined in terms of various operating parameters.

19. The method of claim 18 further comprising the step of defining said first and second data in terms of said various operating parameters.

20. The method of claim 19 wherein said various operating parameters include a called number, a time of day, a day of the week, or an area code of a called number.