JP2758694B2 - Call transfer method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a case where a calling subscriber terminal set in a call transfer mode state receives a call from a calling subscriber terminal. Result of comparison between the basic call charge between the subscriber terminal and the destination subscriber terminal and the basic call fee for the calling subscriber when a call from the calling subscriber terminal is transferred to the destination subscriber terminal The present invention relates to an incoming call transfer method for controlling transfer connection of a call from a calling subscriber terminal.

[Prior Art] Conventional call transfer methods are described in, for example,
The thing described in 225058 is known. In this case, when the caller attempts to call the called party who is in the call transfer state, the exchange notifies the caller that the call transfer connection is established. It has become.

[Problems to be Solved by the Invention] However, according to the gazette, the caller knows that the call will be transferred to the transfer destination by a notification from the exchange, but the call destination is not known, but the caller is not known. Is received at the transfer destination. Therefore, such a transfer method may cause a problem in call charges for both the calling party and the called party in some cases. This is because the farther the calling distance from the called subscriber terminal is to the calling party, the more the call charge is required, while the shorter the calling distance to the transfer destination is, The calling subscriber calls directly to the transfer destination, but the call charge is reduced.
Even for the called party, the longer the communication distance between the terminal from which the call should be received and the transfer destination terminal is, the greater the call charge must be paid. It is rather preferable to be called.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for making a caller more economically transferable when a call from a calling subscriber terminal is received while the called subscriber terminal is set to a call transfer mode. The purpose of the present invention is to provide a call transfer method that can be connected to a mobile terminal with a reduced call charge.

[MEANS FOR SOLVING THE PROBLEMS] The object of the present invention is to provide, when a called subscriber terminal is set in a call transfer mode state and a call from a calling subscriber terminal to which a call is to be transferred, Prior to the transfer to the subscriber terminal, in the exchange accommodating the called subscriber terminal or the call transfer device attached to the called subscriber terminal, the calling subscriber terminal number and the transfer destination subscriber terminal number are added. Calling subscription, which is calculated based on the basic call charge when the calling subscriber is directly connected to the destination subscriber terminal and the calling subscriber terminal number and the called subscriber terminal number The call from the calling subscriber terminal is compared with the basic call charge for the calling subscriber when the call is transferred to the destination subscriber terminal, and based on the result of the comparison, the call from the calling subscriber terminal is This is achieved by performing transfer connection control.

[Operation] Before the call from the calling subscriber terminal is forwarded to the forwarding subscriber terminal registered by the called subscriber, the calling subscriber terminal number and the forwarding subscriber terminal number are set. The calling subscriber, calculated based on the basic call charge when the calling subscriber is connected to the direct transfer subscriber terminal and the calling subscriber terminal number and the called subscriber terminal number If the calling subscriber is directly connected to the destination subscriber terminal when the call from the terminal is transferred to the destination subscriber terminal and compared with the basic call charge for the calling subscriber It is objectively known whether it is economical or economical to transfer a call from the calling subscriber terminal to the destination subscriber terminal. That can perform call transfer connection control It is. Specifically, if the basic call charge is low when the call from the calling subscriber terminal is transferred to the destination subscriber terminal, the call is immediately transferred to the destination subscriber terminal. What is necessary is to do so.
Also, if the call from the calling subscriber terminal is forwarded to the destination subscriber terminal and the basic call charge is expensive, the calling subscriber may be referred to as the destination subscriber terminal. What is necessary is just to be notified of the call transfer destination. That is, the call transfer connection control is performed according to the presence or absence of a disconnection operation at the calling subscriber terminal within a predetermined time after the notification of the call transfer destination that is the transfer destination subscriber terminal. It is a good thing. Also, apart from this,
Waiting for a response from the calling subscriber to the announcement of the inquiry about whether or not a transfer connection is requested following the call transfer destination that is the transfer destination subscriber terminal, the call transfer connection control is performed. What is necessary is to do so.

[Example] Hereinafter, the present invention will be described with reference to FIGS.

First, the relay system according to the present invention in one embodiment will be described. FIG. 2 shows the relay system. In this example, when the subscriber 1 accommodated in the exchange (station) 4 calls the subscriber 2 accommodated in the exchange (station) 5, when the subscriber 2 is in the call transfer mode state, The subscriber 3 accommodated in the exchange (station) 6 as a transfer destination subscriber under the control of the call forwarding function in the exchange 5
Is assumed to be called. In each of the exchanges 4 to 6, the exchange operation is performed under the control of central control devices 7 to 9.
Each of them accommodates a transfer subscriber file 11 (only the one accommodated in the control device 8 is shown in this example) for incoming call transfer control. When the subscriber 2 is set to the call transfer mode, the transfer subscriber file 11 sets that fact and the subscriber 3 as the transfer destination subscriber terminal number to be released by the subscriber 2 at any time. On the other hand, every time an incoming call to the subscriber 2 is received at the exchange 5, the central controller 8 refers to the transfer subscriber file 11 for the registered contents corresponding to the subscriber 2.
When the subscriber 2 is set to the call forwarding mode by referring to the setting registration contents, the incoming call is forwarded to the subscriber 3 from the forwarding destination subscriber terminal number. It is. However, if the subscriber 2 is not set to the incoming call setting mode, the subscriber 2
Is what is called by

The outline of the general call transfer operation has been described above. Here, how the call transfer according to the present invention is specifically performed, and a second call transfer processing flow indirectly related to the present invention, is shown. This will be described below with reference to FIG.

That is, subscriber 1 calls subscriber 2 so that subscriber 1
When the terminal number is dialed from, the terminal number is received and analyzed by the exchange 4, and as a result of the analysis, it is known that the subscriber 2 is accommodated in the exchange 5. As a result, the terminal number is transmitted from the exchange 4 to the exchange 5 via the trunks 10A and 10B. In the exchange 5, the terminal number is analyzed by the central control unit 8, and it is known that the incoming call is to the subscriber 2 housed therein. In the case of an incoming call to the self-accommodating subscriber 2, the registered contents of the subscriber 2 are referred to in the transfer subscriber file 11 by the central control unit 8, but depending on the registered contents, the exchange 5 Are roughly divided into two types. If no call transfer mode is set and registered as the registered content, it is determined that the incoming call is in the normal mode, and the subscriber 2 is called. If the subscriber 2 answers this call, a call between the subscribers 1 and 2 becomes possible. Also, if the call transfer mode is set and registered, the transfer control of the incoming call is normally performed based on the transfer destination subscriber terminal number set and registered as a pair. Processing is performed. Under the control of the central controller 8, the subscriber 1 is connected to the talkie apparatus 12, and the talkie apparatus (trunk) 12 forwards an incoming call to the subscriber 1, and the subscriber 1 as a transfer destination subscriber terminal. Information related to the terminal of the subscriber 3 (for example, a combination of the area name and the subscriber terminal number (including the area code) (specific example: Tokyo 03-xxx-xxxxxx)) is notified as a message. It is something that is to be done. From this notification, it is known that the subscriber 1 transfers the incoming call to the subscriber 3, and at the same time, whether the call by the call transfer is economical or not.
It is generally known whether it is economical to call the subscriber 3 directly.

By the way, two methods can be considered as the subsequent processing. Although not shown in FIG. 2,
The first is a method in which the subscriber 1 performs an on-hook operation as needed within a certain time after the notification is completed. More specifically, if it is judged that it is economical for the subscriber 1 to call the subscriber 3 directly, the subscriber 3 performs the on-hook operation once within the fixed time, and then obtains the subscriber 3 obtained from the notification.
The subscriber 3 may be called by dialing the terminal number. If the subscriber 1 determines that it is economical to transfer the incoming call, the subscriber 1 has to wait for the subscriber 3 to answer the call without performing any operation. It is. If the on-hook operation is not performed by the subscriber 1 within the fixed time, the subscriber 3 is called based on the terminal number of the subscriber 3 previously transmitted from the exchange 5 to the exchange 6 via the trunk 10C, If the subscriber 3 responds to the call, the subscribers 1 and 3 are connected via the transfer trunk 14, so that a call can be made between the subscribers 1 and 3. Although this method is simple, on the other hand, it is difficult for subscribers in general to understand the operation procedure. However, if there is a message such as "If you want to call a direct transfer destination, go on-hook once" following the message notification, the problem will be solved to some extent.

The second is complicated, but the operation is easy to understand. That is, as shown in FIG. 2, following the message notification, a message for inquiring whether or not to perform a transfer is sent from the talkie device 12 to the subscriber 1 in order to prompt a response from the subscriber 1. It is supposed to be. From this notification, the subscriber 1 can generally know which connection method is more economical. However, the subscriber 1 needs a necessary response to the notification (for example, "0" when the call transfer is desired). If the call transfer is rejected, dial operation of "1" is sent as a PB signal, and the response is received and identified by the signal receiver 13, and thereafter, processing according to the response content is performed. Things. That is, if the call transfer is rejected, the transmission of the message from the talkie device 12 is immediately stopped, and then the message for prompting the subscriber 1 to perform the on-hook operation is transmitted from the talkie device 12. I have. If the line is disconnected by the on-hook operation within a certain time, or if the on-hook operation is not performed even after the lapse of the certain time, the exchange 5 may forcibly disconnect the line. However, in the case of the rejection of the call transfer, the same result can be obtained by performing the on-hook operation by the subscriber 1 when the message of the transfer destination subscriber terminal number is notified without sending a response. I have.

On the other hand, if the response content indicates that the call transfer is desired, the message transmission from the talkie device 12 is immediately stopped, and then the message indicating that the call transfer is performed is transmitted from the talkie device 12 to the subscriber 1. It has become. Prior to this message transmission, the terminal number of the subscriber 3 is transmitted from the exchange 5 to the exchange 6, so that a call can be made between the subscribers 1 and 3 in the same manner as in the previous case.

In the above, the call transfer function indirectly according to the present invention using the call transfer function in the exchange has been described. However, such a call transfer is uneconomical to perform, but the call transfer is performed by the call transfer device attached to the subscriber terminal. The same can be performed by the transfer function. FIG. 3 shows a relay system in an example of such a case. Incidentally, in this example, the subscriber telephone set as the subscriber 2 and the call transfer device 15 are treated as separate ones, but they may be configured as one. As shown, the second
Different from what is shown in the figure, the subscriber 2 is a call forwarding device.
When the transfer changeover switch 16 provided in 15 is in the state as shown in the figure, it is set to the non-call transfer mode, and when it is not in the state, it is set to the call transfer mode. When the subscriber 2 is set to the non-call forwarding mode, the subscriber 2 is switched to the exchange 5 every time there is an incoming call to the subscriber 2.
While being called more normally, in a state where the call transfer mode is set, an incoming call to the subscriber 2 is transferred to the subscriber 3 via the call transfer device 15.

Here, the operation will be briefly described assuming that the subscriber 2 is in the call transfer mode, and that of the subscriber 3 is set in the call transfer device 15 by the subscriber 2 as the call transfer destination terminal number. It is as follows.

That is, when the terminal number of the subscriber 2 is dialed from the subscriber 1 to call the subscriber 2 from the subscriber 1, the terminal number is analyzed by the exchange 5 to receive the call via the incoming line f. An incoming connection is made to the transfer device 15. In this case, since the transfer changeover switch 16 is set to the call transfer mode, the telephone circuit 17 responds to the incoming call, and as a result, the talkie section 18 is activated. The fact that the call transfer is performed to the party 3 is further notified of an inquiry message as to whether or not the call transfer is desired. If a response is sent from the subscriber 1 in the same way as in the previous case in response to the inquiry message, the response is received and identified by the signal transmitting / receiving unit 19, and thereafter, connection processing is performed according to the received identification result. It has become something. That is,
In the case of the rejection of the call transfer, the telephone circuit 17 is activated by the signal transmission / reception section 19 to perform the call termination operation, and the telephone circuit 17 sends a call termination signal to the preceding side. On the other hand, if a response is desired to be forwarded, after the transfer connection unit 20 is activated by the signal transmission / reception unit 19 to make a call via the transmission line g, the terminal number of the subscriber 3 is automatically dialed via the transmission line g. It is sent by. At that time, the talkie part
From 18, the subscriber 1 is notified that the call transfer to the subscriber 3 is being performed. Eventually,
If the subscriber 3 answers the call while the communication path from the transfer connection unit 20 to the subscriber 3 is set, the message transmission from the talkie unit 18 to the subscriber 1 is stopped based on the response, and the subscriber 3 The connection between the subscribers 1 and 3 is made possible through the call transfer device 15 so that the call between the subscribers 1 and 3 becomes possible. In this example, the connection processing is performed after waiting for a response from the subscriber 1 to the inquiry message. The on-hook operation is performed on the calling subscriber side because the inquiry message is unnecessary. It is clear that similar connection processing can be performed depending on whether or not the connection processing is performed.

Finally, a call transfer method according to the present invention when the call charge is strictly considered will be described. In each of the examples described so far, whether or not to perform call forwarding is determined based on relatively arbitrary judgment by the calling subscriber. However, call forwarding when call charges are strictly considered. If
If it is determined that the call transfer is more economical than the direct call in terms of call charges, call transfer will be performed unconditionally, but otherwise will be almost the same as the examples described so far. Then, the connection process is performed.

That is, FIG. 4 shows a relay system in a case where the common channel signaling system is applied to the system shown in FIG. As shown, each of the exchanges 4 to 6 accommodates common line signaling devices 22A to 22C via central control devices 7 to 9, and exchanges connection control signals between the exchanges 7 to 9 via common line signaling devices 22A to 22C. It can be done.

Now, assume that the subscriber 1 calls the subscriber 2 in the call transfer mode. In this state, subscriber 1
When the terminal number of the subscriber 2 is dialed from the subscriber 1, the exchanges 5 are sent to the subscribers 1 and 2 via the common line signaling devices 22A and 22B.
Each terminal number is transmitted. These terminal numbers are controlled by the central control unit 8 under the charge comparison circuit.
On the other hand, the terminal number of the transfer destination subscriber (in this example, the subscriber 3 is assumed) is read out from the transfer subscriber file 11 on the basis of the terminal number of the subscriber 2, and the charge comparison circuit 21. The charge comparison circuit 21 uses the terminal numbers of the subscribers 1 and 3 to transfer the basic call charge (subscribed between the subscribers 1 and 2 and the subscriber 2 when the call transfer is performed). , 3 is paid by the subscriber 2) and the basic call charge to be paid by the subscriber 1 when the subscriber 1 calls the subscriber 3 directly, and then compared. In this comparison, if it is found that the call transfer for the subscriber 1 is advantageous in terms of the call charge, the call transfer is performed unconditionally. Based on the notification from the charge comparison circuit 21, the central control unit 8 performs call transfer connection control. If it is found that the call transfer is not advantageous for the subscriber 1 in terms of the call charge, the talkie device 12 is activated by the charge comparison circuit 21, and the subscriber 1 1
Is notified of at least the transfer destination of the call which is the transfer destination subscriber terminal, and further inquired as to whether or not to perform the call transfer if necessary. With this notification, the subscriber 1 can arbitrarily select whether to perform call forwarding or call the subscriber 3 directly. Although it is considered difficult to apply the incoming call transfer method in this embodiment to an incoming call transfer device attached to the subscriber terminal, it is theoretically possible to implement it.

[Effect of the Invention] As described above, in the case of claims 1 to 5,
If the called subscriber terminal is set to the call transfer mode and there is a call from the calling subscriber terminal, the calling subscriber can more economically reduce the call charge with the transfer destination subscriber terminal. Thus, there can be obtained such an effect that the connection can be made.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall call transfer processing flow in an example according to the present invention indirectly, and FIGS. 2, 3, and 4 each show a relay system in an example according to the present invention. FIG. 1-3 subscribers, 4-6 exchanges (stations), 7-9
... Central control unit, 11 ... Transfer subscriber file, 12 ... Talkie apparatus, 13 ... Signal receiver, 14 ... Transfer trunk,
15 Call forwarding device, 21 Charge comparison circuit, 22A-22C
... Common line signaling device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-35861 (JP, A) JP-A-1-218159 (JP, A) JP-A-62-219859 (JP, A) JP-A-1- 296755 (JP, A) JP 41-15650 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04M 3/54

Claims (5)

(57) [Claims] A call from a calling subscriber terminal is controlled in advance by a called subscriber under the control of a call forwarding function provided in an exchange or a call forwarding function of a call forwarding device attached to the subscriber terminal. A call transfer method for transferring a call to a registered transfer destination subscriber terminal, wherein a call from a calling subscriber terminal is set in a state in which a called subscriber terminal is set to a call transfer mode. If there is, prior to the transfer of the call to the destination subscriber terminal, the switching subscriber accommodating the called subscriber terminal, or the call transfer device attached to the called subscriber terminal, calls the calling subscriber. The basic call charge when the calling subscriber is directly connected to the destination subscriber terminal, which is calculated based on the terminal number and the destination subscriber terminal number, and the calling subscriber terminal number and the called subscriber terminal Calling subscription calculated based on the number When the call from the terminal is transferred to the destination subscriber terminal, the basic call charge for the calling subscriber is compared, and based on the result of the comparison, the call transfer from the calling subscriber terminal is performed. A call transfer method that allows connection control. 2. A case where a call from a calling subscriber terminal is transferred to a destination subscriber terminal as compared with a basic call charge when the calling subscriber is directly connected to the destination subscriber terminal. 2. The call transfer method according to claim 1, wherein when the basic call charge for the calling subscriber is low, the call from the calling subscriber terminal is immediately transferred to the transfer destination subscriber terminal. 3. A case where a call from a calling subscriber terminal is transferred to a destination subscriber terminal as compared with a basic call charge when the calling subscriber is directly connected to a destination subscriber terminal. If the basic call charge for the calling subscriber is expensive, the exchange that accommodates the called subscriber terminal, or the call transfer device attached to the called subscriber terminal sends the calling subscriber terminal to the calling subscriber terminal. 2. A method according to claim 1, wherein at least the destination of the call which is the destination subscriber terminal is notified. 4. An exchange accommodating the called subscriber terminal or a call transfer device attached to the called subscriber terminal, after the call transfer destination, which is the transfer destination subscriber terminal, is notified. 4. The incoming call transfer method according to claim 3, wherein the call transfer / connection control is performed in accordance with the presence or absence of a disconnection operation at the calling subscriber terminal within a predetermined time. 5. An exchange accommodating a called subscriber terminal, or a call transfer device attached to the called subscriber terminal, is successively notified of a call transfer destination which is a transfer destination subscriber terminal. 4. The incoming call transfer method according to claim 3, wherein the call transfer connection control is performed after waiting for a response from the calling subscriber to the inquiry about whether the transfer connection is desired or not.