JP3150264B2 - Incoming connection control method when changing extension phone number - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a telephone system in which an extension telephone number is dialed from a calling extension subscriber in order to call the called extension subscriber while the extension telephone number of the called extension subscriber has been changed. The incoming call from the calling extension subscriber to the called extension subscriber, based on the guidance from the announcement device, in particular, the new extension subscriber of the old extension telephone number or the new extension The present invention relates to an incoming call connection control method when an extension telephone number is changed so as to be received by a called extension subscriber of a telephone number.

[0002]

2. Description of the Related Art Private branch exchanges (hereinafter simply referred to as exchanges)
In, the extension telephone number (hereinafter, simply referred to as a telephone number) of an extension subscriber (hereinafter, simply referred to as a subscriber) may be frequently changed due to a personnel change of a accommodated extension subscriber, A disadvantage in such a case where the telephone number is frequently changed is that when the calling subscriber calls the called party related to the telephone number change without knowing the fact of the change, the old telephone number is In some cases, dialing is performed by a calling subscriber. As a matter of course,
Since the old phone number is already unused or already used by a new subscriber,
As it is, incoming calls from the calling subscriber cannot be received by the desired called subscriber. By the way, as a method for coping with such a situation, for example, a number change notification transfer system described in Japanese Patent Application Laid-Open No. 62-217759 has been known. In this case, the exchange is provided with a table of the new and old telephone numbers, and if the destination telephone number exists in the old telephone number table, the call to the called subscriber is a talkie for directory guidance. After the call is once connected to the device and a common number announcement is made to the calling subscriber, the call is automatically forwarded to the called subscriber using the new telephone number. ing. Further, in the case of Japanese Patent Application Laid-Open No. 55-136763, after the guidance of the new telephone number of the called subscriber to the calling subscriber from the talkie (announcement) device,
The call to the called party is to be automatically transferred to the called party by the new telephone number.

[0003] Incidentally, the connection system for a change telephone set described in Japanese Patent Application Laid-Open No. 55-136763 will be described in detail with reference to FIG.
That is, assuming that the extension telephone (hereinafter simply referred to as a telephone) of the called subscriber a has already been changed from the telephone A to the telephone B, the calling subscriber c calls the called subscriber a from the telephone C. When the telephone number corresponding to the telephone A is dialed, the telephone number is changed under the exchange control by the exchange 1 before the call to the called subscriber a is terminated to the telephone A via the route I. It is to be checked based on the number change data inside the exchange 1. If the telephone number of the called party a has already been changed to a telephone number corresponding to the telephone B by this check, the call is once transferred to the announcement device 2 via the route II, and then the announcement device 2
To the telephone C via the route III
After the change guidance to the effect that the telephone number has been changed to the new telephone number is given, the call is automatically transferred to the telephone B via the route IV by the new telephone number.

[0004]

However, as can be seen from the above, according to the conventional measures at the time of changing the telephone number, the connection switching to the called subscriber by the new telephone number after the guidance is completed. In practice, it is impossible to change the connection to the old telephone using the old telephone number as it is even though a telephone corresponding to the old telephone number actually exists. The problem in this case is not simply that it is impossible to change the connection to the old telephone, but the problem is that even if a telephone corresponding to the old telephone number actually exists, the old telephone That is, the number had to be a free telephone number. Under the condition that the old telephone number must be a free telephone number, it is necessary to provide a free telephone number verification process and a free telephone number registration storage area in addition to the normal connection process in order to provide telephone number guidance. For this reason, restrictions have been imposed naturally on extremely limited telephone number plans and storage areas. Further, according to the prior art, when the subscriber of the telephone is changed, that is, when the subscriber for the telephone A is changed from the subscriber a to the subscriber b, the telephone set for calling the subscriber a is changed. To the calling subscriber who dialed the telephone number corresponding to A, the following message is displayed: "Currently, telephone A is used by subscriber b. No service has been provided for notifying the change of the telephone subscriber. Therefore, when the telephone number corresponding to the telephone A is dialed, the old subscriber a and the new subscriber b
Among them, no service has been provided in which any of the subscribers is selected by the calling subscriber by the PB signal and the call is transferred to the selected subscriber.
Under such circumstances, it is even better to use a DP telephone that cannot transmit a PB signal, or a facsimile terminal with an automatic transmission function that cannot understand a selection operation by voice from an exchange even if the selection operation is prompted. On the other hand, it is considered that the above service cannot be provided at all.

A first object of the present invention is to make a call when a telephone number of a called subscriber is changed to a new telephone number and the old telephone number of the called subscriber is dialed from the calling subscriber. Incoming connection at the time of telephone number change, in which the subscriber of the new telephone number or the subscriber of the old telephone number is selected by the subscriber's free will, and the call can be transferred to the selected subscriber. To provide a control method. A second object of the present invention is to provide a method for changing the calling party's telephone number when the called party's telephone number is changed to a new telephone number and the calling subscriber's old telephone number is dialed. The subscriber of the new telephone number or the subscriber of the old telephone number is selected at will.
A call may be diverted to the selected subscriber and, under certain conditions, the call may be diverted to the attendant console;
The purpose of the present invention is to provide an incoming connection control method when a telephone number is changed.
A third object of the present invention is to provide a method for changing the calling party's telephone number when the called party's telephone number is changed to a new telephone number and the calling party dials the called party's old telephone number. The callee of the new telephone number or the subscriber of the old telephone number may be selected at will, and the call may be transferred to the selected subscriber, and under certain conditions, the call may be renewed. The present invention provides a method for controlling incoming connection when a telephone number is changed, which can be transferred to the called subscriber of the telephone number. A fourth object of the present invention is to provide the calling subscriber with the callee's telephone number changed to a new telephone number and the calling subscriber dialing the old telephone number of the called subscriber. The present invention provides a method for controlling incoming calls when a telephone number is changed so that the call can be transferred to a called subscriber having a new telephone number after the telephone number change guidance is provided from the exchange.

[0006]

A first object of the present invention is to provide a method for subscribing to a call from an announcer when a telephone number dialed by a calling subscriber is identified as being changed to a new telephone number. For the subscriber, following the telephone number change guidance including the name of the new subscriber of the old telephone number and the new telephone number of the called subscriber, either the new subscriber or the called While subscriber selection guidance is sent to prompt the user to make a selection, in response,
When the selection number is transmitted as a PB signal from the calling subscriber, the incoming call to the called subscriber is achieved by being received by either the new subscriber or the called subscriber.

A second object of the present invention is that when a telephone number dialed from a calling subscriber is identified as being changed to a new telephone number, the announcement device informs the calling subscriber of the change. Following the telephone number change guidance including the name of the new subscriber of the old telephone number and the new telephone number of the called subscriber, prompting the user to select either the new subscriber or the called subscriber as a selection number. If the subscriber selection guidance is transmitted as a PB signal from the calling subscriber within a certain period of time in response to this, the incoming call to the called If either the subscriber or the called subscriber terminates the call, but the selection number is not transmitted within the fixed time, the incoming call to the called subscriber is achieved by being terminated at the relay console.

[0008] The third object is that when the telephone number dialed by the calling subscriber is identified as being changed to a new telephone number, the announcement device informs the calling subscriber of the change. Following the telephone number change guidance including the name of the new subscriber of the old telephone number and the new telephone number of the called subscriber, prompting the user to select either the new subscriber or the called subscriber as a selection number. If the subscriber selection guidance is transmitted as a PB signal from the calling subscriber within a certain period of time in response to this, the incoming call to the called If either the subscriber or the called party receives a call, but the selection number is not sent within a certain period of time, the incoming call to the called subscriber is achieved by being received by the called subscriber. Is done.

The fourth object is that when the telephone number dialed from the calling subscriber is identified as being changed to a new telephone number, the announcement device informs the calling subscriber of the change. An incoming call to the called party is immediately received by the called party after the telephone number change guidance including the new subscriber's name of the old telephone number and the called party's new telephone number is sent. Is achieved by

[0010]

When the telephone number dialed by the calling subscriber is identified by the exchange as being changed to a new telephone number, the calling subscriber is notified of the new subscriber of the old telephone number. Followed by guidance containing the name of the new subscriber and the new telephone number of the called subscriber, a guidance is sent to prompt the user to select either the new subscriber or the called subscriber. If the calling party sends the selection number as a PB signal, incoming calls to the called party will be sent to the new subscriber,
It can be received by any of the called subscribers. Also,
If the called party is immediately called after sending the guidance including the new subscriber's name of the old telephone number and the new telephone number of the called subscriber, be aware of any changes in the telephone number of the called subscriber. Instead, the calling subscriber can be quickly connected to the called subscriber even if the calling terminal is a DP telephone or a facsimile terminal with an automatic calling function. Furthermore, if the option number is transmitted within a certain time, the call is received by either the new subscriber or the called subscriber, but if the option number is not transmitted within the certain time, the call is received by the attendant console. In such a case, the calling subscriber can be connected to either the new subscriber or the called subscriber via the attendant handler, even if the calling terminal is a DP telephone. At this time, if the called party receives the call instead of the relay console, the calling subscriber will not be aware of the telephone number change of the called subscriber and the calling terminal will Even a DP telephone or a facsimile terminal with an automatic calling function can be connected to a called subscriber.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. First, an outline of the incoming connection control method according to the present invention is shown in FIG.
This is as follows. That is, as shown in the figure, the exchange 1 accommodates a plurality of telephones A, B, C and an announcement device 2, but in this example, the subscriber a of the telephone A It is assumed that b becomes a new subscriber for telephone A, and then calling subscriber c responds to telephone A by calling subscriber c so that calling subscriber c calls subscriber a from telephone C. Is assumed to be dialed. Now, when the calling subscriber c dials the telephone number corresponding to the telephone A, the exchange 1 changes the subscriber a from the telephone A to the telephone B. A call to the called subscriber a to be terminated at A is automatically forwarded to the announcement device 2 via the route II once. As a result, the announcement device 2 sends the telephone number change guidance to the telephone C via the route III, and the calling subscriber c can identify the subscribers b and a of the telephones A and B based on the guidance contents. is there. Then, following the telephone number change guidance, the subscriber selection guidance sent via the route III prompts the user to select either the subscriber a or b. The PB signal is transmitted to the announcement device 2 via the PB signal.
Which is known. Therefore, the telephone number indicating the call transfer destination is sent from the announcement device 2 to the exchange 1
, The call to called party a, which would otherwise be terminated at telephone A under control of exchange 1 based on that telephone number, is transmitted to telephone A via path V or
The call is received by telephone B via V '.

The outline of the incoming call connection control method according to the present invention has been described above. Hereinafter, the present invention will be described more specifically. FIG. 2 shows an internal configuration of an example of the exchange 1 and the announcement device 2 according to the present invention. As shown in the figure, the telephones 3 to 5 correspond to the telephones C, A, and B described above, respectively, and a telephone line switch 11 is provided inside the exchange 1 in which the telephones 3 to 5 are accommodated. And a main storage device 13 for storing an exchange control program and various data, and a central processing unit 12 for collectively controlling the exchange operation in the exchange 1. In addition, the subscriber telephone number data 131 and the telephone number corresponding automatic transfer data 132 are registered as updatable. On the other hand, the announcement device 2 includes a central processing unit 24 for collectively controlling the operation of the announcement device 2, a directory guidance data 25 in which guidance data corresponding to a telephone related to a telephone number change is accumulated, and a number guidance data 25. A number guidance reproducing unit 23 that generates telephone number change guidance and subscriber selection guidance based on the guidance data 25, and a signal receiving unit 21 that receives a selection number from a calling subscriber and a transfer source telephone number from the exchange 1.
And a telephone number transmitting unit 22 for transmitting a telephone number corresponding to the selection number to the exchange 1.

As shown in FIG. 4, the telephone numbers of the telephones 4 and 5 are "2000" and "5000", and the telephone number of the telephone 4 is "a". In the state where the subscribers of the telephones 4 and 5 have been changed to “b” and “a” respectively due to the change of the workplace, the old telephone number “2000” is used to call the subscriber a from the subscriber c of the telephone 3. If the number is dialed, the guidance at the most would be as follows: "The telephone number you have called has been changed to 5000. We will continue to connect. (Outgoing) After being sent to the subscriber c, the telephone number becomes "50".
In this case, the transfer connection has been changed to the telephone number "00". However, in the case of the present invention, if the old telephone number "2000" is dialed from the subscriber c to call the subscriber a, the processing flow shown in FIG. 2)
, The call to the subscriber a is processed. That is, first, the calling subscriber type is determined, and if the calling subscriber type is not the announcement device 2 or the relay console, in other words, if the calling subscriber is a PB / DP telephone, a facsimile terminal with an automatic calling function, or the like. The extension information of the telephone number "2000" is checked by referring to the subscriber telephone number data 131 and the automatic transfer data 132 (steps 111 to 11).
4). If the transfer destination telephone number is not registered on the automatic transfer data 132 corresponding to the telephone number "2000", it is assumed that the subscriber of the telephone 4 has not been changed at all and the calling subscriber type is set to the announcement device 2 As in the case of a relay station, a normal incoming connection process is performed. By the way, when the calling subscriber type is the announcement device 2 or the attendant console, since the fact that the subscriber has been changed is already known, the telephone number of the telephone number "2000" immediately (the telephone 4 The telephone number 5 can be called (when the subscriber a of the telephone 4 has been changed). However, the telephone number “90” of the announcement device 2 is set as the transfer destination telephone number corresponding to the telephone number “2000”.
If the number "00" is registered, it is assumed that the subscriber a of the telephone 4 has been changed to a subscriber of another telephone as shown in FIG. The incoming call is once transferred to the announcement device 2 by the transfer function (steps 114 and 115). At this time, the transfer source telephone number "2000" is also sent to the announcement device 2 (process 116).

On the other hand, in the announcement device 2, when the transfer source telephone number is received via the signal receiving unit 21, FIG.
As shown in the figure, under the control of the central processing unit 24, the corresponding data in the directory guidance data 25 is transferred to the directory guidance reproducing unit 23, and the telephone number is transmitted from the directory guidance reproducing unit 23 to the calling subscriber c. Subsequent to the telephone number change guidance relating to the number "2000", the subscriber selection guidance is transmitted (process 117). As such guidance, for example, "the telephone number 200
Number 0 is currently b. Subscriber a has been changed to number 5000. If you call subscriber b, dial "1". When connecting to subscriber a, dial "2". Is transmitted. As shown in FIG. 7, when the guidance prompts the calling subscriber c to dial "1" or "2" as the option number, the option number is received as a PB signal in the announcement device 2. Part 2
1, the content is analyzed by the central processing unit 24 (process 118). According to the analysis result, as shown in FIG. 8, the telephone number corresponding to the selection number is transmitted from the telephone number transmitting section 22 to the exchange 1 (steps 119 and 120). In the example shown in FIG. 8, since the old telephone number "2000", that is, the subscriber b is selected as the called subscriber, FIG.
As shown in the figure, the call to the subscriber a is connected to the telephone 4 of the subscriber b. At that time, the telephone number "50
When the number "00" is selected, it goes without saying that the call to the subscriber a is connected to the telephone set 5 of the subscriber a. After all, an incoming call to the called subscriber a can be received by either the new subscriber b or the called subscriber a based on the free will of the calling subscriber c. In addition to the case where the transfer destination of the subscriber a is the telephone housed in the exchange 1, the incoming connection to these telephones is possible regardless of whether it is a telephone housed in a dedicated line or a telephone housed directly in the office line. Is what is being done.

In the above description, the destination telephone number is selected after waiting for the selection number from the calling subscriber c. However, the selection number is not dialed within a predetermined time after the guidance is transmitted from the announcement device 2. In this case, the telephone number "5000" is to be received by the original called subscriber a.
The number may be selected unconditionally.
In this way, if the telephone number "5000" is selected unconditionally, the calling subscriber c can call the calling terminal without any awareness of the change of the telephone number of the called subscriber a. Even a DP telephone or a facsimile terminal with an automatic transmission function can be quickly connected to the called subscriber a.

Incidentally, the case where the facsimile terminal with the automatic transmission function is attached to the telephone 5 will be described as follows. That is, for example, the facsimile terminal with an automatic calling function was originally attached to the telephone 4 of the telephone number "2000", but the facsimile terminal was transferred to the telephone 5 of the telephone number "5000" by changing the company number. Assuming that the telephone 4 is newly changed to another subscriber b, if an attempt is made to perform facsimile transmission from a facsimile terminal outside the company to the telephone 4 having a telephone number "2000", the exchange 1 As in the case, the call to the telephone 4 is transferred to the announcement device 2 by the automatic transfer function. The announcement device 2 sends out the subscriber selection guidance following the telephone number change guidance. However, the facsimile terminal with the automatic transmission function, which is the originating subscriber, does not understand the guidance contents, and While waiting for the connection with the facsimile terminal, the announcer device 2 will not transfer the call to the telephone 4 to the destination because the calling subscriber does not send out the selection number within a certain time after the guidance is sent out. Can be received by the telephone 5 of the telephone number "5000".

The present invention has been described above. By the way, in the above, since the DP calling subscriber cannot transmit the selection number as the PB signal, the called subscriber of the new telephone number is allowed to receive a call, but the old telephone number is still available. New subscribers cannot be connected by their will. In order to make this possible, it is conceivable that if the selection number is not transmitted within a certain period of time, an incoming call is once connected to the relay console. If an attendant handler is involved, the calling subscriber can be arbitrarily connected to either the new subscriber or the called subscriber, even if the calling terminal is a DP telephone. Things.

Hereinafter, a case will be described in which a call is once connected to a relay console when a selection number is not transmitted within a predetermined time. FIG. 10 shows the present invention in which call transfer to the relay console is considered. 1 shows an internal configuration of an example of the exchange 1 and the announcement device 2. In this case, the difference from the one shown in FIG. 2 is that the exchange 1 has a telephone 6 for a relay connection operator as an existing one or is newly accommodated, and continues with the telephone number change guidance. Then, if the selection number is not transmitted from the DP calling subscriber within a certain time after the subscriber selection guidance is transmitted, the telephone number corresponding to the telephone 6 is transmitted from the telephone number transmission unit 22 to the exchange 1. By being sent, the call to the called subscriber a is once transferred to the attendant handler. FIG. 11 shows an example of the incoming connection control processing flow at the time of changing the telephone number according to the present invention in consideration of the call transfer to the attendant console.
If the selection number is not sent from the DP calling subscriber within a certain time, the call to the called subscriber a is temporarily transferred to the telephone 6 (process 121). As a result, the DP calling subscriber gives the new subscriber b,
By notifying one of the called subscribers a as the destination, the destination telephone number is dialed from the relay connection operator by the callback transfer function which is a known technique. Since the caller is a relay station, the call from the DP calling subscriber can be arbitrarily received at either the telephone 4 or the telephone 5 by performing a normal connection process (processing). 11
3).

[0019]

As described above, according to the first aspect, the telephone number of the called subscriber is changed to the new telephone number, and the old telephone number of the called subscriber is dialed from the calling subscriber. In this case, the calling subscriber can be selectively transferred to either the called subscriber of the new telephone number or the subscriber of the old telephone number according to the voluntary intention of the calling subscriber. If the telephone number of the called subscriber is changed to a new telephone number and the old telephone number of the called subscriber is dialed by the calling subscriber, the new telephone And the call can be forwarded to an attendant console under certain conditions, and the call can be forwarded to an attendant console under certain conditions. If the called party's phone number is changed to a new phone number and the calling When the old telephone number of the called subscriber is dialed, the called subscriber of the new telephone number or the subscriber of the old telephone number is selected and voluntarily selected by the calling subscriber. The call may be forwarded to the called subscriber and under certain conditions the call may be forwarded to the called subscriber of the new telephone number, and also in accordance with claim 4, the called subscriber. Is changed to a new telephone number, and the calling party dials the old telephone number of the called party, the calling party receives a telephone number change guidance from the exchange side. , The call can be quickly transferred to the called subscriber of the new telephone number.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an outline of an incoming connection control method according to the present invention;

FIG. 2 is a diagram showing an internal configuration of an example of an exchange and an announcement device according to the present invention;

FIG. 3 is a diagram showing an example of an incoming connection control processing flow when a telephone number is changed according to the present invention;

FIG. 4 is a diagram for explaining the incoming connection control processing operation (part 1);

FIG. 5 is a diagram for explaining the incoming connection control processing operation (part 2).

FIG. 6 is a diagram (part 3) for explaining the incoming connection control processing operation in the same manner;

FIG. 7 is a diagram for explaining the incoming connection control processing operation (part 4);

FIG. 8 is a diagram for explaining the incoming connection control processing operation (part 5).

FIG. 9 is a diagram for explaining the incoming connection control processing operation (part 6).

FIG. 10 illustrates call transfer to an attendant console,
FIG. 1 is a diagram showing an internal configuration of an example of an exchange and an announcement device according to the present invention.

FIG. 11 illustrates call transfer to an attendant console,
The figure which shows the example of the incoming connection control processing flow at the time of telephone number change concerning this invention

FIG. 12 is a diagram for explaining a coping method according to the related art when a telephone number is changed.

[Explanation of symbols]

1: Private branch exchange, 2: Announcement device, 3, 4, 5: Extension telephone, 6: Telephone for relay connection handling person

Continuation of front page (56) References JP-A-5-327889 (JP, A) JP-A-62-217759 (JP, A) JP-A-49-18203 (JP, A) JP-A-4-337952 (JP) JP-A-58-3454 (JP, A) JP-A-4-72850 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04M 3/54 H04M 3/50

Claims (4)

(57) [Claims] In a private branch exchange, an old extension telephone number is dialed from a calling extension subscriber to call the called extension subscriber while the extension telephone number of the called extension subscriber has been changed. The incoming connection control method in
If the extension telephone number dialed from the calling extension subscriber is identified as being changed to a new extension telephone number based on the extension subscriber telephone number data stored as renewable inside the private branch exchange, on incoming calls to the called extension subscriber which is once automatically call forwarded to the announcement device, said Ana
For the calling extension subscriber from the Wunsu equipment , follow the extension telephone number change guidance including the name of the new extension subscriber of the old extension telephone number and the new extension telephone number of the called extension subscriber,
While the extension subscriber selection guidance for urging the user to select either the new extension subscriber or the called extension subscriber as a selection number is transmitted, the calling extension is sent as a response to the extension subscriber selection guidance. If the subscriber sends the selection number as a PB signal to the announcement device ,
Under the incoming call control by the private branch exchange based on the extension number corresponding to the selection number transferred from the announcement device , the incoming call from the calling extension subscriber to the called extension subscriber is sent to the new extension subscriber and the called extension. An incoming connection control method when an extension telephone number is changed so that any one of the subscribers receives an incoming call. 2. A case where an old extension telephone number is dialed by a calling extension subscriber to call the called extension subscriber while the extension telephone number of the called extension subscriber is changed in the private branch exchange. The incoming connection control method in
If the extension telephone number dialed from the calling extension subscriber is identified as being changed to a new extension telephone number based on the extension subscriber telephone number data stored as renewable inside the private branch exchange, on incoming calls to the called extension subscriber which is once automatically call forwarded to the announcement device, said Ana
For the calling extension subscriber from the Wunsu equipment , follow the extension telephone number change guidance including the name of the new extension subscriber of the old extension telephone number and the new extension telephone number of the called extension subscriber,
While the extension subscriber selection guidance for urging the user to select either the new extension subscriber or the called extension subscriber as a selection number is transmitted, the response to the extension subscriber selection guidance is performed within a predetermined time. If the selected extension number is sent from the calling extension subscriber to the announcement device as a PB signal, the call origination is controlled by the private branch exchange based on the extension number corresponding to the selection number transferred from the announcement device. An incoming call from a call extension subscriber to a called extension subscriber is received by either the new extension subscriber or the called extension subscriber, while the selected extension number is selected from the calling extension subscriber within the predetermined time. If it is not sent to the announcement device as a PB signal, under the incoming call control by the private branch exchange based on the extension telephone number corresponding to the attendant console transferred from the announcement device ,
An incoming call connection control method when an extension telephone number is changed so that an incoming call from a calling extension subscriber to a called extension subscriber is received at a relay console. 3. A private branch exchange in which a calling extension subscriber dials an old extension telephone number to call the called extension subscriber while the extension telephone number of the called extension subscriber has been changed. The incoming connection control method in
If the extension telephone number dialed from the calling extension subscriber is identified as being changed to a new extension telephone number based on the extension subscriber telephone number data stored as renewable inside the private branch exchange, on incoming calls to the called extension subscriber which is once automatically call forwarded to the announcement device, said Ana
For the calling extension subscriber from the Wunsu equipment , follow the extension telephone number change guidance including the name of the new extension subscriber of the old extension telephone number and the new extension telephone number of the called extension subscriber,
While the extension subscriber selection guidance for urging the user to select either the new extension subscriber or the called extension subscriber as a selection number is transmitted, the response to the extension subscriber selection guidance is performed within a predetermined time. If the selected extension number is sent from the calling extension subscriber to the announcement device as a PB signal, the call origination is controlled by the private branch exchange based on the extension number corresponding to the selection number transferred from the announcement device. An incoming call from a call extension subscriber to a called extension subscriber is received by either the new extension subscriber or the called extension subscriber, while the selected extension number is selected from the calling extension subscriber within the predetermined time. If the PB signal is not sent to the announcement device, under the incoming control of the private branch exchange based on the new telephone extension transferred from the announcement equipment, the called extension from a calling extension subscriber Incoming connection control method at the time of telephone extension changes as incoming calls to subscribers are coming into said called extension subscriber. 4. A case where an old extension telephone number is dialed from a calling extension subscriber to call the called extension subscriber while the extension telephone number of the called extension subscriber is changed in the private branch exchange. The incoming connection control method in
If the extension telephone number dialed from the calling extension subscriber is identified as being changed to a new extension telephone number based on the extension subscriber telephone number data stored as renewable inside the private branch exchange, on incoming calls to the called extension subscriber which is once automatically call forwarded to the announcement device, said Ana
After the extension device has transmitted the extension telephone number change guidance including the name of the new extension subscriber of the old extension telephone number and the new extension telephone number of the called extension subscriber to the calling extension subscriber, the announcement device Extension from the calling extension subscriber to the called extension subscriber under the termination control by the private branch exchange based on the new extension telephone number transferred from the extension. Incoming connection control method when changing phone numbers.