Method and apparatus for network-based telephone communication without a separate call manager unit

• US 6,765,902 B1
• Filed: 08/27/1999
• Issued: 07/20/2004
• Est. Priority Date: 08/27/1999
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Nelson, Mark R.
• Primary Examiner(s): Pham, Chi
• Assistant Examiner(s): HOANG, THAI D
• Application Number:
  US09/385,229
• Time in Patent Office: 1,789 Days
• Field of Search: 370/352-356, 370/395.52, 370/419, 370/463, 370/260, 370/270, 370/271, 379/156, 379/162-165, 379/177, 379/182
• US Class Current: 370/352
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 61/10 of different types
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04M 1/715 using two or more extensions per line cordless telephones H04M1/725
• CPC Class Codes: H04M 3/42314 in private branch exchanges
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42

Abstract

A system (10) includes a network (12) of the type used to interconnect computers, and includes a plurality of telephone units (21-26) which are coupled to the network. These telephone units have sufficient embedded intelligence so that they can carry out all of their intended functionality as telephones. The system thus does not include a physically separate master control computer which is coupled to the network to serve as a call manager server or key system unit that treats the telephones as slaves. Each telephone has a manually operable device such as thumbwheels (108), which can be used to specify a unique number that forms part of the network address of the telephone and which also serves as the extension number for that telephone. One or more of the telephones can optionally be coupled to respective telephone lines (31-33) of a conventional public switching telephone network (36). Also, several computers (16-19) may optionally be coupled to the network, and communicate with each other through the network.

Claims

1. An apparatus, comprising:

a network through which can be transmitted message units containing information in a digital format;

a plurality of separate telephone units which are each coupled to said network, which are each usable by a person, and which communicate with each other by transmitting message units through said network; and

a control portion which is integral in its entirety to said telephone units, and which in response to a manual event at a first of said telephone units is operative to selectively establish audio communication between said first telephone unit and a second of said telephone units by transmitting message units between said first and second telephone units through said network;

wherein said control portion is operative to cause each of said telephone units to use message units transmitted through said network to automatically identify every other said telephone unit coupled to said network, and to obtain from every other said telephone unit a respective unique network address thereof.

2. An apparatus according to claim 1, wherein said second telephone unit is coupled to a telephone line of a telephone system, and wherein said control portion is operative to facilitate communication through said network between said telephone line and one of said telephone units other than said second telephone unit.

3. An apparatus according to claim 1, wherein said second telephone unit is coupled to a telephone line of a telephone system, and wherein said control portion is operative to facilitate communication through said network between said telephone line and a third of said telephone units, and to facilitate communication through said network between said first and second telephone units while said third telephone unit is in communication with said telephone line.

4. An apparatus according to claim 1, including first and second computers which are coupled to said network and which communicate with each other by transmitting message units through said network.

5. An apparatus according to claim 1, wherein said message units conform to an Internet protocol (IP) communication standard.

6. An apparatus according to claim 1, wherein each of said telephone units is operable to permit a network address therefor to be specified manually.

7. An apparatus according to claim 6, wherein an extension number for each of said telephone units is a function of the manually specified network address.

8. An apparatus according to claim 1, wherein each said telephone unit responds to a predetermined manual operation thereof by transmitting to every other said telephone unit a message unit which identifies the occurrence of said predetermined manual operation.

9. A method, comprising the steps of:

providing a network through which can be transmitted message units that contain information in a digital format;

coupling to said network a plurality of separate telephone units which are each usable by a person, and which have therein a control portion that is integral in its entirety to said telephone units, and that transmits message units through said network in order to effect communication between said telephone units;

causing said control portion to respond to a manual event at a first of said telephone units by selectively establishing audio communication between said first telephone unit and a second of said telephone units using message units transmitted between said first and second telephone units through said network; and

causing each of said telephone units under control of said control portion to transmit message units through said network in order to automatically identify every other said telephone unit coupled to said network and in order to obtain from every other said telephone unit a respective unique network address thereof.

10. A method according to claim 9, including the steps of coupling a telephone line to said second telephone unit, and causing said control portion to facilitate communication through said network between said telephone line and one of said telephone units other than said second telephone unit.

11. A method according to claim 9, including the step of coupling a telephone line to said second telephone unit, and causing said control portion to facilitate communication through said network between said telephone line and a third of said telephone units, and to facilitate communication through said network between said first and second telephone units while said third telephone unit is in communication with said telephone line.

12. A method according to claim 9, including the steps of coupling first and second computers to said network, and effecting communication between said computers by transmitting message units through said network.

13. A method according to claim 9, including the step of manually specifying for each of said telephone units a respective unique network address.

14. A method according to claim 13, including the step of using as an extension number for each of said telephone units a number based on the manually specified network address.

15. A method according to claim 9, including the step of causing each of said telephone units to respond to a predetermined manual operation thereof by transmitting to every other said telephone unit a message unit which identifies the occurrence of said predetermined manual operation.

16. An apparatus, comprising:

first and second telephone units which are each usable by a person and which each include a network interface portion that can be operatively coupled to a network and that can transmit and receive network message units containing information in a digital format, said first and second telephone units including a control portion which is integral in its entirety to said first and second telephone units, and which in response to a manual event at one of said first and second telephone units is operable to selectively establish audio communication between said first and second telephone units by causing said network interface portions thereof to transmit network message units between said first and second telephone units;

wherein said second telephone unit has a line interface portion that can be operatively coupled to a telephone line of a telephone system, and wherein said second telephone unit is operable under control of said control portion to facilitate communication between said line interface portion thereof and said network interface portion thereof by converting audio information received in a predetermined form through said line interface portion thereof into network message units to be transmitted through said network interface portion thereof, and by converting audio information received through said network interface portion thereof in the form of network message units into the predetermined form to be transmitted through said line interface portion thereof.

17. An apparatus according to claim 16, wherein said second telephone unit has an audio user interface portion and is further operable under control of said control portion to facilitate communication between said network interface portion thereof and said audio interface portion thereof while facilitating said communication between said line interface portion thereof and said network interface portion thereof, by converting audio information received through said audio interface portion thereof into network message units to be transmitted through said network interface portion thereof, and by converting audio information received in network message units through said network interface portion thereof into a form to be supplied to said audio user interface portion thereof.

18. An apparatus according to claim 16, wherein said network message units conform to an Internet protocol (IP) communication standard.

19. An apparatus according to claim 16, wherein each said telephone unit is operable under control of said control portion to permit a network address thereof to be manually specified.

20. An apparatus according to claim 19, wherein each said telephone unit is operable under control of said control portion to have an extension number which is a function of the manually specified network address thereof.

21. An apparatus according to claim 16, wherein each said telephone unit is operable under control of said control portion to respond to a predetermined manual operation by transmitting through said network interface portion thereof at least one network message unit which identifies the predetermined manual operation.

22. An apparatus, comprising:

first and second telephone units which are each usable by a person and which each include a network interface portion that can be operatively coupled to a network and that can transmit and receive network message units containing information in a digital format, said first and second telephone units including a control portion which is integral in its entirety to said first and second telephone units, and which in response to a manual event at one of said first and second telephone units is operable to selectively establish audio communication between said first and second telephone units by causing said network interface portions thereof to transmit network message units between said first and second telephone units;

wherein each said telephone unit is operable under control of said control portion to transmit through said network interface portion thereof a polling network message unit that polls for the presence of at least one other telephone unit, and to respond to receipt of a polling network message unit through said network interface portion thereof by transmitting through said network interface portion thereof at least one network message unit which includes a unique network address thereof.