Granted Patent B2

US 7,221,662 · App. 09/920,362 · Granted May 22, 2007

Abstract

Claims (40)

1. A communications system comprising:

a first interface establishing device connected between the first network control device and a transmitting network; wherein

a first communication device and said first network control device are connected such that a use signal and a control signal are sent separately to said first network control device;

said first network control device and said first interface establishing device are connected such that said use signal and said control signal are sent separately to said first interface establishing device,

said first interface establishing device is configured to send said control signal over said transmitting network and comprises a compressing unit configured to compress said use signal, the compressed signal being sent over said transmitting network; and

a tone generation unit is provided on the far-end side of the network configured to receive said control signal after transmission through said transmitting network and to generate a tone signal in response to said control signal wherein

a second interface establishing device connected to said transmitting network; and

a second network control device; wherein

said second interface established device comprises

a decompressing unit configured to decompress said use signal received via said transmitting network;

a control transfer unit configured to receive said control signal and sending said control signal to said second network control device; and

a second communication device,

wherein said second interface establishing device is configured to send said use signal to said second network control device, and

said second network control device is configured to send said control signal and said use signal separately to said second communication device.

2. A communication system according to claim 1 , wherein said second communication device comprises said tone generation unit.

3. A communication system according to claim 1 , wherein said tone signal generated in response to said control signal is a DTMF signal.

4. A communication system according to claim 1 , wherein said first communication device is further configured to generate said control signal in response to an operation of a key.

5. A communication system according to claim 1 , wherein said transmitting network is an IP based network.

6. A communication system according to claim 1 , wherein said first communication device is a mobile phone.

7. A communication system according to claim 1 , wherein said first communication device is a fixed phone.

8. A communication system according to claim 1 , wherein said second communication device is a mobile phone.

9. A communication system according to claim 1 , wherein said second communication device is a fixed phone.

10. A communication system according to claim 1 , wherein said first network control device and said first interface establishing device are constructed as one unit.

11. A communication system according to claim 1 , wherein

said first network control device and said first interface establishing device are constructed as separate units.

12. A communication system according to claim 1 , wherein

said second network control device and said first interface establishing device are constructed as one unit.

13. A communication system according to claim 1 , wherein said first network control device and said first interface establishing device are constructed as separate units.

14. A communication system according to claim 1 , further comprising a network communication device connectable directly to said transmitting network such that said control signal and said use signal is transmitted from said first interface establishing device to said network communication device.

15. A communication system according to claim 14 , wherein said transmitting network is and IP based network and said network communication device is an IP phone.

16. A communication method for a communication system said method comprising:

sending a use signal and a control signal from said first communication device to said first network control device separately;

sending said use signal and said control signal from said first network control device to said first interface establishing device separately;

receiving said control signal from said first network control device and sending said control signal over said transmitting network; and

receiving said control signal after transmission through said transmitting network by a tone generation units provided on the fair-end side of the network;

and generating a tone signal in response to said control signal,

wherein the communication system includes a first communication device, a first network control device configured to control a first network to which said first communication device is connected, and a first interface establishing device connected between said first network control device and a transmitting network,

wherein said generating said tone signal is performed in a second communication device.

17. A method according to claim 16 , further comprising of compressing said use signal, the compressed signal being sent over said transmitting network.

18. A method according to claim 17 , further comprising receiving said compressed use signal and said control signal in a communication system on a far-end side of said transmitting network.

Assignments (8)