Connection of a computer to a telephone exchange

• US 6,937,703 B1
• Filed: 03/31/1997
• Issued: 08/30/2005
• Est. Priority Date: 03/31/1997
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Andreason, Per Tomas
• Primary Examiner(s): Hoosain, Allan
• Application Number:
  US08/828,548
• Time in Patent Office: 3,074 Days
• Field of Search: 370/352, 370/353, 370/380, 370/389, 370/392, 370/396, 370/401, 370/404, 370/427, 370/435, 370/450, 370/465, 370/485, 370/400, 379/90.01, 379/93.01, 379/93.05, 379/93.09, 379/100.15, 379/100.16, 379/88.17, 379/88.18, 379/265.01, 379/265.09
• US Class Current: 379/88.17
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 2012/6472 Internet
• CPC Class Codes: H04L 2012/6475 N-ISDN, Public Switched Telephone Network [PSTN]
• CPC Class Codes: H04M 7/128 Details of addressing, directories or routing tables
• CPC Class Codes: H04Q 11/04 for time-division multiplexing H04Q11/0001 takes precedence
• CPC Class Codes: H04Q 2213/1302 Relay switches
• CPC Class Codes: H04Q 2213/13034 A/D conversion, code compression/expansion
• CPC Class Codes: H04Q 2213/1304 Coordinate switches, crossbar, 4/2 with relays, coupling field
• CPC Class Codes: H04Q 2213/1305 Software aspects
• CPC Class Codes: H04Q 2213/13093 Personal computer, PC
• CPC Class Codes: H04Q 2213/13097 Numbering, addressing
• CPC Class Codes: H04Q 2213/13166 Fault prevention
• CPC Class Codes: H04Q 2213/13176 Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/13204 Protocols
• CPC Class Codes: H04Q 2213/1322 PBX
• CPC Class Codes: H04Q 2213/13389 LAN, internet

Abstract

The present invention relates to a telephone system, an exchange and a method for setting up telephone connections between a computer, which is an extension of the exchange, and the exchange via a computer network. The exchange comprises a switch core, a switch control means for setting up connections and a network connection device connected between the switch core and the computer network. The computer comprises a function for use as a telephone and has a computer network address. The network connection device registers the computer as a telephone to which calls can be made in the switch control means, sets up at least one traffic channel via the computer network for sending speech signals, and, receives data packets containing telephony from the computer over the traffic channel and removes a signal structure suitable for telephony from the data packets. The switch control means allocates a telephone number to the computer.

Claims

1. Method for using a computer as a telephone comprising the steps of:

connecting the computer to a telephone exchange via a computer network, such that the computer is capable of receiving telephone calls over a direct telephone connection between the computer and a calling party;

registering, in the exchange, the computer as a telephone;

allocating, by the exchange, a unique telephone number that is to be associated with the computer;

setting up, via the computer network, a traffic channel between the telephone exchange and the computer, for sending and receiving speech signals;

generating data packets containing telephony by applying, in the exchange, a signal structure, suitable for telephony, to speech signals intended for the computer; and

sending the data packets containing telephony to the computer over said traffic channel wherein telephony comprises speech signals transmitted between a user of the computer and the calling party in real time.

2. Method according to claim 1, further comprising the step of:

using the traffic channel for signaling before sending the data packets containing telephony.

3. Method according to claim 1, further comprising the step of:

setting up, via the computer network, a signaling channel between the exchange and the computer.

4. Method according to claim 3, wherein the step of setting up the traffic channel and the step of setting up the signaling channel comprise the step of:

receiving a demand from the computer to set up the traffic and signaling channels upon activation of a telephone function in the computer.

5. Method according to claim 3, wherein the step of registering the computer as a telephone comprises the steps of:

sending an identity from the computer to a DNS server; and

receiving, in the computer, a computer network address for the exchange, wherein the computer network address for the exchange has been produced by the DNS server based on said identity, and wherein the address is used for setting up the signaling channel and the traffic channel between the exchange and the computer.

6. Method according to claim 1, wherein the step of setting up the traffic channel comprises the step of:

using a predetermined port number stored in the computer and the exchange.

7. Method according to claim 3, wherein the step of setting up the signaling channel and the step of setting up the traffic channel comprise the step of:

exchanging port numbers, wherein the exchange has selected a port number for the signaling channel and the traffic channel to be used by the computer when sending data packets to the exchanges and the computer has selected corresponding port numbers to be used by the exchange when sending data packets to the computer.

8. Method according to claim 4, further comprising the steps of:

receiving, in a network connection device of the exchange having a first computer network addresses, said demand from the computer;

querying the computer about its identity; and

sending, based on the query, a second computer network address associated with a second network connection device in the exchange to the computer, so that the computer can connect to the second network connection device.

9. Method according to claim 1, wherein the step of generating data packets containing telephony by applying a signal structure is preceded by the step of compressing the speech signals.

10. Method for using a computer as a telephone comprising the steps of:

connecting the computer to a telephone exchange via a computer network, wherein the computer is an extension of the telephone exchange, such that said computer is capable of being used to originate a telephone call over a direct telephone connection between the computer and a called party;

registering, in the exchange, the computer as a telephone;

allocating, by the exchange, a telephone number to the computer;

setting up, via the computer network, a traffic channel between the exchange and the computer, for receiving speech signals;

receiving, in the exchange, data packets containing telephony from the computer over said traffic channel; and

removing a signal structure suitable for telephony from the contents of the data packets wherein telephony comprises speech signals transmitted between a user of the computer and the called party in real time.

11. Telephone exchange comprising:

a switch core;

means for setting up a direct telephone connection, via a computer network, between an originating terminal and a receiving terminal, wherein one or both terminals is a computer, and wherein the computer and the computer network are configured as an extension of the telephone exchange, and

switch control means for allocating a telephone number to the computer, and for setting up a connection between a user of the exchange and a first network connection device connected between the switch core and a gate of the exchange for communication with the computer, wherein the computer comprises a telephone function and has a computer network address, and wherein the first network connection device comprises;

means for registering, in the switch control means, the computer as a telephone to which calls can be made;

means for setting up, via the computer network, a traffic channel between the exchange and said computer, for sending speech signals;

signal processing means for generating data packets containing telephony, by applying a signal structure, suitable for telephony, to speech signals received from the switch core intended for the computer; and

means for sending the data packets containing telephony to the computer over the traffic channel wherein telephony comprises speech signals transmitted between the originating terminal and the receiving terminal in real time.

12. Telephone exchange according to claim 11, wherein said network connection device further comprises:

means for setting up, via the computer network, a signaling channel between the exchange and the computer.

13. Telephone exchange according to claim 11, wherein said network connection device further comprises:

means for using the traffic channel for signaling prior to sending speech signals.

14. Telephone exchange according to claim 11, wherein the network connection device further comprises:

means for setting up a signaling channel between the exchange and the computer; and

means for receiving a demand from the computer upon activation of the telephone function in the computer.

15. Telephone exchange according to claim 12, wherein the network connection device further comprises:

means for sending an identity of the computer to a DNS server;

means for receiving a computer network address for the computers and

means for using the computer network address for setting up the traffic channel and the signaling channel between the exchange and the computer, said network address being produced by the DNS server based on the computer identity.

16. Telephone exchange according to claim 11, wherein the network connection device further comprises:

means for using predetermined, stored port numbers when setting up a channel.

17. Telephone exchange according to claim 13, further comprising a second network connection device, wherein the first network connection device has a first computer network addresses of the exchange, and wherein the first network connection device further comprises:

means for receiving the demand from the computer;

means for querying the computer about its identity; and

means for sending, based on the query, a second computer network address associated with the second network connection device to the computer, so the computer can connect to the second network connection device.

18. Telephone exchange according to claim 11, wherein the network connection device further comprises:

means for compressing the speech signals before applying the signal structure.

19. Telephone exchange comprising:

a switch core;

means for setting up a direct telephone connection, via a computer network, between a computer and another party, wherein the computer is an extension of the exchange, and wherein the computer is capable of originating and receiving direct telephone calls as a telephone; and

switch control means for allocating a telephone number to the computer; and

means for setting up a connection between a user of the exchange and a network connection device connected between the switch core and a gate of the exchange for communicating with the computer,

wherein the computer comprises a telephone function and a computer network address; and

wherein the network connection device comprises;

means for registering, in the switch control means, the computer, as a telephone to and from which calls can be made;

means for setting up via the computer network, a traffic channel between the exchange and the computer, for receiving speech signals;

means for receiving data packets containing telephony from the computer over said traffic channel; and

signal processing means for removing a signal structure, suitable for telephony over the computer network, from the contents of the data packets to produce speech signals containing telephony wherein telephony comprises speech signals transmitted between said computer and said another party in real time.

20. Telephone system comprising:

a computer;

a computer network;

a telephone exchange; and

means for setting up a telephone connection between the computer and the telephone exchange via the computer network, wherein the computer is an extension of the exchange and has associated with it a computer network address, and wherein the computer is capable of directly receiving a telephone call from another party,

the exchange comprising;

a switch core,

switch control means for allocating a telephone number to the computer, and means for setting up a connection between a user of the exchange and a network connection device connected between the switch core and the computer network, the network connection device comprising;

means for registering, in the switch control means, the computer as a telephone to which direct telephone calls can be made;

means for setting up, via the computer network, a traffic channel between the exchange and said computer, for sending speech signals;

signal processing means for applying a signal structure, suitable for telephony over the computer network, to speech signals received from the switch core intended for the computer in order to produce data packets containing telephony; and

means for sending the data packets containing telephony to the computer over the traffic channel wherein telephony comprises speech signals transmitted between said computer and said another party.

21. Telephone system comprising:

a computer,

a computer network,

a telephone exchange, and

means for setting up a telephone connection between the computer and the telephone exchange via the computer network, wherein the computer is an extension of the exchange and the computer network interconnects the telephone exchange and the computer, and wherein the computer has a computer network address, and wherein the computer is configured such that it can be utilized to originate a direct telephone call connection with another party,

the exchange comprising;

a switch core,

switch control means for allocating a telephone number to the computer, and means for setting up a connection between a user of the exchange and a network connection device connected between the switch core and the computer network,

the network connection device comprising;

means for registering, in the switch control means, the computer as a telephone from which direct telephone calls can be made;

means for setting up, via the computer network, a traffic channel between the exchange and the computer, for receiving speech signals;

means for receiving data packets containing telephony from the computer over said traffic channel; and

signal processing means for removing a signal structure, suitable for telephony over the computer network, from the contents of the data packets wherein telephony comprises speech signals transmitted between said computer and said another party in real time.