JP2000244650A - Speech system and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a call damage by connecting a telephone set which receives a call with an automatic answering telephone service center for taking a mes sage even when detecting a state incapable of call transfer that a call can not be transferred. SOLUTION: When the designation of transfer is set at a telephone set 3 while an incoming transfer service is started by a telephone set 2, a switchboard 6 starts the automatic answering telephone service of the telephone set 2, and transfers the start information to an automatic answering telephone service center 8 at the time of detecting a state incapable of call transfer that any call from a telephone set 1 can not be transferred to the telephone set 3, and connects the telephone set 2 with the automatic answering telephone service center 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone system, a telephone system, and a telephone method for making a telephone call with a general telephone, a portable telephone and a PHS.

[0002]

2. Description of the Related Art A conventional telephone communication system is known which has a call transfer device for transferring a call from a calling telephone to a second telephone when the first telephone cannot receive a call from the calling telephone. Have been.

[0003]

However, in this type of conventional communication system, the call is disconnected when the second telephone to which the call is transferred is busy, for example. There is a problem that a call loss occurs.

[0004] It is an object of the present invention to provide a communication system and method capable of preventing call loss.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 is provided in accordance with the present invention. And a call transfer disabled state detecting means for detecting a call transfer disabled state in which a call from a calling telephone cannot be transferred to a second telephone. And an answering machine connecting means for connecting the first telephone to an answering machine service center for storing a message message when the call transfer impossible state is detected by the transfer impossible state detecting means.

A second aspect of the present invention is characterized in that, in the first aspect of the invention, the call transfer disabled state detecting means detects a call state of the second telephone as a call transfer disabled state.

According to a third aspect of the present invention, in the first aspect of the invention, the call transfer disabled state detecting means detects a failure state of the second telephone as a call transfer disabled state.

According to a fourth aspect of the present invention, there is provided a telephone system having a call transfer means for transferring a call from a calling telephone to a second telephone when the first telephone cannot receive a call from the calling telephone. In the calling method, a call transfer disabled state detecting step for detecting a call transfer disabled state in which a call from a calling telephone cannot be transferred to a second telephone, and an answering machine for storing a message message when the call transfer disabled state is detected. An answering machine connecting step of connecting the first telephone to the telephone service center.

According to a fifth aspect of the present invention, in the invention of the fourth aspect, the call transfer disabled state detecting step is a step of detecting a call state of the second telephone as a call transfer disabled state. And

According to a sixth aspect of the present invention, in the invention of the fourth aspect, the call transfer disabled state detecting step is a step of detecting a failure state of the second telephone as a call transfer disabled state. And

[0011]

Next, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a call system according to one embodiment of the present invention includes a telephone 1,
2, 3, 4, exchanges 5, 6, 7 and an answering machine service center 8. The telephone 1 is connected to the exchange 5. The telephone 2 is connected to the exchange 6. The telephones 3 and 4 are connected to the exchange 7. The exchange 6 is connected to the exchanges 5 and 7. The exchange 6 is connected to an answering machine service center 8. The answering machine service center 8 is a facility having a function (answering machine service) for storing a message message from a calling telephone instead of a receiving telephone when the receiving telephone cannot receive a call.

Next, an example of the operation of the communication system according to the present invention will be described with reference to FIGS. It is assumed that the telephone 2 is set to receive the call transfer service and the answering machine service, and that the transfer destination is set to the telephone 3 during the activation of the call transfer service. The call transfer service is a function of transferring a call to a predetermined telephone when the telephone 2 cannot receive a call from another telephone.
That is, the setting is made so that the outgoing call from the telephone 1 is transferred to the telephone 3 when the telephone 2 cannot receive the call from another telephone. Now, it is assumed that the telephone 3 is talking with another telephone.

It is assumed that the telephone 1 calls the telephone 2 under this condition. At this time, the exchange 5 transfers the call to the telephone 3 because the telephone 2 is activating the call transfer service. However, since the telephone 3 is busy, the exchange 6 detects a call transfer disabled state in which a call from the telephone 1 cannot be transferred to the telephone 3. The exchange 6 activates the answering machine service of the telephone 2 when detecting the call transfer impossible state, transfers the activation information to the answering machine service center 8, and connects the telephone 2 to the answering machine service center 8. The exchange 5 can also detect a state in which the telephone 3 cannot receive a call due to a failure or the like as a call transfer impossible state.

[0014]

According to the present invention, even when an outgoing call transfer disabled state in which an outgoing call cannot be transferred is detected, the called telephone can be connected to an answering machine service center for storing a message message. Loss can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a communication system as one embodiment of the present invention.

FIG. 2 is a block diagram for explaining an operation of the communication system of FIG. 1;

FIG. 3 is a diagram showing a signal sequence for explaining an operation of the communication system in FIG. 1;

[Explanation of symbols]

 1-4 telephone 5-7 exchange 8 answering machine service center

Claims (6)

[Claims] 1. A telephone system comprising a call transfer means for transferring a call from a calling telephone to a second telephone when the first telephone cannot receive a call from the calling telephone. Call forwarding disabled state detecting means for detecting a call forwarding disabled state in which a call from the calling telephone cannot be forwarded, and a message message when the call forwarding disabled state is detected by the call forwarding disabled state detecting means. An answering machine connection means for connecting the first telephone to an answering machine service center to be kept. 2. The communication system according to claim 1, wherein said call transfer disabled state detection means detects a call transfer state of said second telephone as said call transfer disabled state. . 3. The communication system according to claim 1, wherein said call transfer disabled state detecting means detects a failure state of said second telephone as said call transfer disabled state. . 4. A method according to claim 1, further comprising a call transfer means for transferring the call from the calling telephone to the second telephone when the first telephone cannot receive the calling from the calling telephone. A call transfer disabled state detecting step of detecting a call transfer disabled state in which a call from the calling telephone cannot be transferred to the second telephone; and an answering machine service center for storing a message message when the call transfer disabled state is detected. An answering machine connection step for connecting the first telephone set. 5. The communication method according to claim 4, wherein said call transfer disabled state detecting step is a step of detecting a call state of said second telephone as said call transfer disabled state. How to call. 6. The communication method according to claim 4, wherein said call transfer disabled state detecting step is a step of detecting a failure state of said second telephone as said call transfer disabled state. How to call.