JPH08317064A - Electronic exchange system - Google Patents

Abstract

PURPOSE: To store plural sets of dial information by storing one or plural sets of dial information. CONSTITUTION: A storage device 7 of an electronic exchange A has a storage table storing plural sets of dial information. When dial information is stored in the storage table, a called telephone set or a caller telephone set 1a(1n) makes dialing. After storing plural sets of dial information to the storage table, every time a speech is finished, a control processing unit 6 accesses the storage device 7, reads sequentially the stored dial information to call the telephone set to which the dial information is allocated. Every time preceding speech is finished, as to the dial information of a transfer destination, the telephone set of the transfer destination is called sequentially and processed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic exchange system, and in particular, by storing one or a plurality of dial information, it is possible to sequentially make a call with a called telephone corresponding to the stored dial information. Regarding improvement of service functions.

[0002]

2. Description of the Related Art Recently, electronic private branch exchanges have been provided with various functions, one of which is a transfer service function. Call forwarding services include call forwarding, call forwarding, and response delay forwarding.All of these forwarding services are available when an incoming call is made from an external line or another extension to an extension for which forwarding registration has been made. It is designed such that the incoming call transfer process is performed on the extension of the transfer destination registered in advance.

[0003]

However, the conventional electronic exchange having the transfer service function of this kind stores, for example, one dial information as a transfer destination and transfers only to the telephone corresponding to the dial information. It is configured to handle incoming calls. For this reason, even if the incoming call transfer process is performed, it is often impossible to connect to the transfer destination telephone due to absence or busy.

Further, when the caller makes a call with a plurality of telephones accommodated in the electronic exchange, the caller requests the callee to transfer the call or, after the call ends, makes a call operation again to the desired transferee phone. There was a problem that I had to do.

In this case, after the previous call is finished, the call operation must be performed to another telephone, which is bothersome and the call operation must be performed as the previous call is prolonged. I sometimes forgot.

Therefore, the present invention eliminates these problems,
It is an object of the present invention to provide an electronic exchange system capable of storing dial information of a plurality of telephones, sequentially transmitting a call according to the stored dial information, and sequentially performing a call.

[0007]

According to the present invention, in an electronic exchange system comprising an electronic exchange to which a plurality of telephones are connected, the telephone can input a plurality of dial information for receiving an incoming call to another telephone. The electronic exchange has possible dial input means, and the electronic exchange stores information storing means for storing a plurality of dial information inputted by the dial input means and information retrieving means for searching one of the stored dial information. And a calling means for calling the called telephone corresponding to the retrieved dial information, and the call line formed between the telephone corresponding to the called dial information and the electronic exchange is disconnected, And means for searching the dial information different from the previously searched dial information, and as a result, sequentially calling the telephone.

[0008]

According to the present invention, a plurality of dial information items are stored in the telephone set on the calling side for the dial information corresponding to the telephone set on the called side that wants to receive an incoming call.
Each time the call ends, it is possible to call another telephone corresponding to the dial information stored in sequence.

Further, since the dial information desired to be received by another telephone can be designated each time the previous telephone call is completed, it is possible to make a telephone call with a plurality of telephones by making an outgoing call once on the calling side. is there.

Further, regardless of the telephone set of the calling side or the called side, the telephone information of the forwarding destination is stored during the call by storing the dial information of the forwarding destination from one of the telephones. Is transferred by going on-hook.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of the overall configuration of an electronic exchange system showing an embodiment of the present invention. In FIG. 1, A is an electronic exchange, 1a to 1n are telephones, and the plurality of telephones 1a to 1n are electronic exchanges A.
Are connected to the communication path network (SW) 3 via the line circuits (LC) 2a to 2n, respectively.

The telephones 1a to 1n are button telephones as an example, and include a handset 12 and a dial keypad 1.
3, a function key 14, a line selection key 15 and the like. The function key 14 is used as various function keys, and the line selection key 15 is used to select a line such as an office line or an extension line.

The speech path network (SW) 3 is used for switching connections between extension lines or from extension lines to station lines (external lines) and from external lines to internal lines, and through the station line trunk circuits (TRK) 4a to 4n. Is connected to the extension line via the line circuits (LC) 2a to 2n.

The line circuits (LC) 2a to 2n are connection interfaces provided for each extension, and are connection interfaces between the communication path network (SW) 3 and each telephone. The office line trunk circuits 4a to 4n, which are subscriber circuits,
This is a circuit that interfaces with the call path network (SW) 3 and the respective corresponding office lines, and performs incoming call detection, DC loop closure for line capture, and the like. The line circuits 2a to 2n and the office line trunk circuits 4a to 4n are
Originating, receiving,
The control processing unit (CC) 6 can detect status information such as end of call, busy, on-hook and off-hook of the telephones 1a to 1n.

As described above, the communication path network (SW)
3, the line circuits (LC) 2a to 2n and the office line trunk circuits 4a to 4n are connected to the control processing unit (CC) 6 via the control data bus line 5, and the storage unit (MEM).
Using the data stored in 7, the call path network (S
W) 3 between telephones 1a-1n or telephone 1a
It is configured to form a communication path between 1n and the central office line.

The input / output device 8 is used to set information required by the electronic exchange A, for example, telephone numbers assigned to the telephones 1a to 1n, service functions, etc. in the telephones 1a to 1n.

The tone circuit 9 includes a control data bus line 5
It is connected to the control processor (CC) 6 via. The storage device (MEM) 7 includes a control processing device (CC) 6
In addition to the information necessary for the operation of, the storage table for storing the dial information of the transfer destination shown in FIG. 5 is stored.

The operation of the transfer process of the electronic exchange system having such a configuration will be described with reference to the drawings. FIG. 3 is an operation flow chart for explaining the operation of the present invention. When an incoming call is received on the central line, the control processing unit (CC) 6
Outputs a signal for automatic response to the office line trunk circuit 4a. The office line trunk circuit 4a supplied with this signal performs an automatic response process for the office line (step 301).

After that, the control processing unit (CC) 6 accesses the PB signal receiving circuit 10 to make it ready to receive the PB signal from the outside line (step 302). Further, the control processing device (CC) 6 accesses the voice synthesizing circuit 11 and announces that the caller can talk with the plurality of telephones by dialing a plurality of dial information by one calling operation. Send signal (step 30)
3).

Note that, as an example of the announcement, a plurality of announcement contents are set in the voice synthesizing circuit 11, as shown in FIG. For example, the announcement content of the announcement number 1 corresponds to the announcement in the above step 303 "Please dial the dial information with the PB signal. If you want to connect with multiple telephones, enter the dial information and dial information. Enter the "*" key between and dial the dial information you want to connect. When you finish dialing the dial information, enter "#" at the end.
Please enter the key and wait as it is. "

The "*" key of this announcement indicates the "*" key 13a of the dial keypad 13 as shown in FIG. 2, and the "#" key indicates the "#" of the dial keypad 13.
The key 13b is shown.

When the caller presses each key of the dial keypad 13 according to the announcement information, a PB signal corresponding to the pressed key is output. Control processor (C
C) 6 monitors whether or not the PB signal output from the telephone set B on the calling side shown in FIG. 2 is supplied to the electronic exchange A.

As an example, the transfer destination dial information desired by the sender is "2001" number, "2003" number, "200".
It is assumed to be No. 5 ”. In this case, the caller selects "2", "0", from the dial keypad 13 of the telephone B.
"0", "1", "*", "2", "0", "0",
"3", "*", "2", "0", "0", "5",
Press each key in the order of "#".

The PB signal corresponding to the pressed key is output from the telephone set B and supplied to the PB signal receiving circuit 10 of the electronic exchange A. Then the control processor (CC)
6 accesses the PB signal receiving circuit 10 and stores the supplied PB signal as a plurality of dial information in the memory device (MEM) 7 as shown in FIG. 5 (step 30).
4). The control processing device (CC) 6 monitors whether or not the PB signal corresponding to the “#” key output from the telephone set B is supplied to the PB signal receiving circuit 10.

This is because, as described above, the "#" key is assigned in advance as the end of the input operation. When the control processing unit (CC) 6 confirms that the PB signal corresponding to the “#” key is supplied, the first dialed dial information among the plurality of dial information stored in the memory unit (MEM) 7 is displayed. Information, that is, dial information "2001" corresponding to the first in the transfer destination order is read (step 30).
5).

Further, the control processing device (CC) 6 has dial information "2001" read from the storage device (MEM) 7.
It is judged whether or not the connection between the telephone 1a corresponding to and the central office line is possible (step 306).

When the telephone 1a corresponding to the dial information "2001" is in the on-hook state, the control processor (C
C) 6 judges that it is possible to connect to the central office line, and calls the telephone set 1a to which the dial information "2001" is assigned (step 307).

This calling process is performed by the control processing unit (CC).
6 accesses the tone circuit 9, and the tone circuit 9 sends a calling signal to the telephone 1a. When the telephone 1a answers the call (step 30)
8) Then, a telephone call is made between the telephone set B and the telephone set 1a (step 309).

When the call ends and the telephone 1a on the receiving side goes on hook (step 310), and the telephone B on the calling side also goes on hook, the call ends (step 318). When the on-hook signal is supplied from the telephone set B on the calling side to the electronic exchange A, the control processing device (CC) 6 performs control for erasing the dial information stored in the storage device (MEM) 7. .

Even if the call ends, if the telephone set B on the calling side is in the standby state (off-hook state) with the handset 12 held up, the transfer process is performed in the electronic exchange A. In this transfer processing, the control processing device (CC) 6 dials the second dial information stored in the storage device (MEM) 7, that is, the dial information “20 corresponding to the second in the transfer destination order”.
"03" is read (step 312).

In this way, when the previous call is completed and the dial information to be transferred next is stored (step 31).
3), the same processing as steps 306 to 309 described above is repeated. On the contrary, if the dial information to be transferred next is not stored, the call ends.

When the telephone 1 is busy at step 306, the control processing device (CC) 6 calls the dial information which the caller wants to receive next (step 31).
4). For example, in FIG. 5, the call with the telephone set to which the transfer destination number 1 dial information “2001” is assigned is terminated, and the telephone number to which the transfer destination number 2 dial information “2003” is assigned is called when the telephone is busy. This is a case in which the telephone set to which the third dial information “2005” in the transfer destination order is assigned cannot be called.

The control processing unit (CC) 6 executes step 31.
In step 4, the storage device (MEM) 7 is accessed, and then the presence or absence of dial information for which an incoming call is desired is searched (step 31).
5). Here, if there is dial information, that is, the dial information “2005” is called in the above example, and the control processing device (CC) 6 determines whether or not the telephone 1 to which this dial information is assigned is free ( Step 31
6).

In step 316, if the telephone set 1 is idle, the control processing unit (CC) 6 causes the voice synthesis circuit 11 to operate.
Is accessed (step 317) and the announcement information is sent to the sender. The announcement information in this case is set to announcement number 2 as an example. “Because the incoming call to the dial information ○○○○ scheduled for transfer connection cannot be received, the next dial information ○○○○ It will be transferred to. " After transmitting such announcement information, the process returns to step 307 described above.

In step 315, if there is no dial information for which an incoming call is desired next, the caller's telephone B goes on-hook (step 318) to end the call. When all the telephones 1a to 1n corresponding to the dial information stored in the storage device (MEM) 7 cannot receive an incoming call due to busy or the like, the control processing device (CC) 6 accesses the tone circuit 9 to talk. A middle tone is sent to the telephone set B on the calling side.

As another example, the announcement information is transmitted instead of the busy tone. As the announcement information in this case, for example, the announcement number 3 is set, and "the dial information of the forwarding destination, dial information ◯ ○○○ number, △△△△ number,…, □□□□□ All the numbers are busy, so you cannot receive the call. "

When sending the announcement information in this way,
After the control processing device (CC) 6 determines in step 316 that all the telephones 1 are busy and cannot receive an incoming call,
The voice synthesis circuit 11 is accessed and the announcement information set in the announcement number 3 is sent to the telephone set B on the calling side.

In this way, when the call is made from the telephone set B on the calling side, even if the dial information is input, the telephone sets 1a to 1n can be received in accordance with the contents of the voice synthesis announcement 1 so that they can be received. When the incoming call cannot be received, the operator on the calling side can check the status of the telephones 1a to 1n on the called side by a busy tone or a voice synthesis announcement.

Next, the second embodiment will be described with reference to the operation flowchart of FIG. In the operation flowchart of FIG. 6, steps 601 and 602
Is step 301 in the operation flowchart shown in FIG.
Since the operation is the same as that of steps 302 and 302, the description thereof will be omitted.

At step 603, the control processor (CC)
6 accesses the voice synthesizing circuit 11 and dials dial information desired to receive a call each time the caller ends the call, thereby making a plurality of telephones 1 by one call operation.
Announcement information indicating that a call can be sequentially made with a to 1n is transmitted.

As an example of this announcement information, the announcement number shown in FIG. 4 is displayed as follows: "Please dial the dial information with the PB signal. If you want to make a call with multiple telephones, even if the call ends. Please lift your handset and wait. "

According to the announcement information having such contents,
When the caller presses each key on the dial keypad 13, a PB signal corresponding to the pressed key is output. The control processing device (CC) 6 monitors whether or not the PB signal output from the calling side telephone B is supplied to the electronic exchange A.

As an example, the transfer destination dial information desired by the sender is "2001" number, "2003" number, "200".
It is assumed to be No. 5 ”. In this case, the caller selects "2", "0", from the dial keypad 13 of the telephone B.
Press each key in the order of "0" and "1".

A PB signal corresponding to the pressed key is output from the telephone set B and supplied to the PB signal receiving circuit 10 of the electronic exchange A (step 604). Then, the control processing device (CC) 6 accesses the PB signal receiving circuit 10 and, using the supplied PB signal as dial information, is it possible to connect the telephone line 1a to which the dial information “2001” is assigned to the station line? Judge whether or not (step 60)
5).

Based on this judgment, dial information "200
When it is possible to receive a call to the telephone 1a to which "1" is assigned,
The control processing device (CC) 6 has dial information “2001”.
Call the telephone set 1a to which is assigned (step 60).
6).

When the telephone 1a responds to this call (step 607), a call line between the office line and the telephone 1a is formed and a call is made (step 608). When the call ends and the telephone 1a on the receiving side goes on-hook (step 609), when it is confirmed that the on-hook signal output from the telephone 1a is supplied to the electronic exchange A, the control processing device (CC) 6 It is monitored whether or not the on-hook signal is supplied from the telephone set B on the calling side (step 61).
1) When the telephone B on the calling side goes on hook, the call ends.

In step 611, if the telephone set B on the calling side does not go on-hook and stands by with the handset 12 raised, transfer processing is performed after a predetermined time has elapsed. The time until the transfer process is set in advance by the input device 8.

The control processing unit (CC) 6 accesses the voice synthesizing circuit 11 (step 612) and sends the announcement information corresponding to the voice synthesizing message 2 of the announcement number 2 shown in FIG. The control is performed so that the data is sent to the user. The content set in the voice synthesis announcement 2 is, for example, "Please dial the dial information for the next incoming call with the PB signal."

In order for the caller to respond to this announcement information, "2", from the dial keypad 13,
Press each key in the order of "0", "0", "3". The PB signal corresponding to the pressed key is output from the telephone set B and supplied to the PB signal receiving circuit 10 of the electronic exchange A (step 604).

Then, the control processing device (CC) 6 accesses the PB signal receiving circuit 10 and connects the telephone line 1 to which the dial information "2003" is assigned with the supplied PB signal as dial information to the station line. (Step 605).

Based on this judgment, dial information "200
If it is possible to receive an incoming call to the telephone set 1 to which "3" is assigned, the above-described processing of steps 602 to 606 is repeated. In step 605, when the telephone set 1 to which the dial information “2003” is assigned cannot be received, the control processing device (C
C) 6 accesses the speech synthesis circuit 11 (step 6
10), control is performed so that the information corresponding to the voice synthesis announcement 3 with the announcement number 3 shown in FIG. 4 is transmitted to the telephone set B on the calling side.

The content set in the voice synthesis announcement 3 is, for example, "the dial information just entered.
You cannot receive a call to a phone assigned the number XX. Next, if there is dial information that you want to receive, please dial using the PB signal. "

When the caller responds to this message information by pressing the desired keys from the dial keypad in sequence, steps 611 and 612 and steps 604 to 609 described above are repeated.

Further, the control processing device (CC) 6 monitors whether or not the telephone set B on the calling side is on-hook with respect to step 610 (step 611), and when the telephone set B on the calling side is on-hook, the call ends.

Next, a third embodiment according to the present invention will be described.
Description will be given with reference to the drawings. The transfer function in the third embodiment is such that the transfer destination dial information can be dialed during a call.

For example, in FIG. 1, 1a to 1n are telephones on the receiving side, and B in FIG. 2 is a telephone on the calling side. The operation in such a configuration will be described with reference to the operation flowchart of FIG.

A telephone line is formed between the telephone set 1a and the telephone set B via the electronic exchange A. During a call, for example, the caller of the telephone set B sends the call to the callee of the telephone set 1a. When there is a request to transfer to 1n, the called party of the telephone 1a receives the hold function key 1 from which the hold function is set from the function keys 14.
Press 4b.

When the hold function key 14b is pressed, information corresponding to the hold function key is output from the telephone 1a,
It is supplied to the electronic exchange A. Control processor (CC) 6
Monitors the presence or absence of supply of information output from a telephone or the like, and when a signal corresponding to the hold function key is supplied, performs line control to temporarily put the line on hold.

After confirming that the holding sound has been sent from the handset, the callee presses the key 14a having the transfer function preset among the function keys 14. Then, a signal corresponding to the key 14a is output from the telephone 1a and supplied to the electronic exchange A.

The control processing device (CC) 6 monitors whether or not a signal corresponding to the transfer function key is supplied (step 701), and the presence / absence of the monitoring process in step 701 is determined. As a result (step 702), when the signal corresponding to the transfer function key is supplied, it is monitored whether the transfer destination number is supplied next (step 703).

Further, the control processor (CC) 6 is a telephone 1
By pressing each key of the dial keypad 13 as the transfer destination number from a, it is monitored whether or not the PB signal corresponding to the pressed key is supplied (step 70).
4) When the transfer destination dial information in the PB signal is supplied, the supplied PB signal is accepted (step 705).

Regarding the supply of the dial information of the transfer destination, the control processing device (CC) 6 monitors whether or not there is a signal indicating the end of the supply of the dial information. In this case, the termination of supply of dial information at the transfer destination is determined by the presence or absence of a signal generated by pressing the key 14a.

The control processing unit (CC) 6 is an electronic exchange A.
If it is determined that the signal supplied by the key 14a is included in the signals supplied to the device (step 706), the contents of the supplied dial information of the transfer destination are checked (step 7).
07).

Whether the control processing unit (CC) 6 checks in step 707 is whether the information signal corresponding to the transfer function key is supplied or whether it is the PB signal for the dial information of a predetermined number of digits. Etc.

In step 707, the control processing device (CC) 6 checks the signal supplied to the electronic exchange A, and if there is no abnormality, accesses the storage device (MEM) 7 (step 708).

The storage device (MEM) 7 has a storage table for storing dial information of the transfer destination, as shown in FIG. And control processor (CC) 6
Performs processing to store the dial information of the transfer destination supplied to the electronic exchange A in the storage table of the storage device (MEM) 7 (step 709).

If there is an abnormality as a result of the check in step 708, the control processing device (CC) 6 accesses the voice synthesizing circuit 11 and performs processing to send an error announcement signal (step 710).

When this error announcement signal is supplied to the telephone set 1a on the called side, the called party determines that the dial information of the transfer destination is erroneous and performs a resetting process. This resetting process can be set by performing the processes of steps 701 to 709 described above.

In step 709, the memory device (MEM) 7
When the control processing device (CC) 6 confirms that the dial information of the transfer destination is stored in the control processing device (CC) 6,
Processing for transmitting a hold tone signal to the telephone 1a on the receiving side is performed.

When the hold tone signal is supplied to the telephone set 1a and the hold tone is sent from the telephone set 1a, the callee depresses the hold key 14b again to establish a communication line between the telephone set 1a and the telephone set B.

In this call line forming process, the information signal corresponding to the hold key sent from the called telephone 1a is supplied to the electronic exchange A, and the control processing device (CC) 6 which monitors the information signal, Line control processing is performed.

During the processing of steps 701 to 710, the control processing device (CC) 6 controls the telephone B on the calling side so as to send out the hold tone signal. Next, with reference to FIG. 8, an operation after the transfer setting described in the operation flowchart of FIG. 7 is performed will be described. The control processing device (CC) 6 includes a telephone set B on the calling side and a telephone set 1a on the receiving side.
The telephone call line is monitored (step 801), and it is monitored whether or not the telephone end signal, that is, the on-hook signal is output from the telephone 1a to which the transfer destination is set.

When confirming that the on-hook signal is supplied from the telephone 1a to the electronic exchange A (step 802), the control processing device (CC) 6 accesses the storage device (MEM) 7.

As described above, if the dial information of the transfer destination is stored in the storage device (MEM) 7, when the control processing device (CC) 6 accesses the storage device (MEM) 7,
It is possible to confirm the content of the dial information stored in the storage device (MEM).

In the control processor (CC) 6, the storage device (M
The contents of the dial information stored in the EM) 7 are confirmed (step 803), and it is judged whether or not there is the dial information of the transfer destination (step 804).

When the transfer destination dial information is present in step 804, the control processing device (CC) 6 causes the storage device (ME
M) Read the corresponding dial information from 7. Further, the control processing unit (CC) accesses the tone circuit 9 and performs a process to send a ring back tone to the telephone 1 corresponding to the dial information read from the storage unit (MEM) 7 (step 805). . During the processing of step 805, the control processing device (CC) is applied to the telephone B on the calling side.
6 performs processing so as to send a normal audible sound signal.

At step 805, the control processing unit (CC) 6 confirms that the electronic exchange A has sent the ringing tone signal to the telephone set 1 (step 806). As a result, the ringing tone signal is being sent. If so, the transfer operation is terminated and processing is performed (step 807).

In this processing, the control processing device (CC) 6 accesses the storage device (MEM) 7 and the storage device (MEM)
The information corresponding to the dial information for which the transfer processing has been completed is deleted from the dial information stored in (1).

In step 804, the storage device (ME
If M) 7 has no transfer destination dial information, the control processing device (CC) 6 performs a process of disconnecting the telephone line formed between the electronic exchange A and the telephone 1 (step 81).
0). This ends the operation of the call and transfer processing.

In the process of FIG. 8, the telephone set for which transfer setting has not been made, that is, the telephone set B on the calling side in this case.
When the call ends on-hook, the transfer process is not performed, and the storage device (ME
The dial information stored in M) 7 is also deleted.

Therefore, in the first embodiment of the present invention,
It can be stored so that a call with a plurality of telephones can be sequentially made at the time of a call operation. In the second embodiment, a call with a plurality of telephones can be performed by dialing dial information of the telephone each time the call ends. It is possible to do.
Also, according to the third embodiment, it is possible to store dial information of another telephone during a call.

[0082]

As described above, according to the present invention, in the calling side telephone, the dialing information corresponding to the called side telephone desiring to receive an incoming call is stored, so that the telephone call ends. After that, the telephone of the called side corresponding to the dial information stored in sequence can be called.

Further, since the dial information for receiving an incoming call to another telephone can be designated after the end of the previous telephone call, it is possible to make a telephone call with the telephone corresponding to the designated dial information by one call operation. it can.

Further, regardless of the telephone set of the calling side or the receiving side, by storing the dial information as the transfer destination from either one of the telephone sets, the telephone set storing the dial information of the transfer destination goes on-hook during the call. By doing so, it is possible to make a call with another telephone.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an electronic exchange system according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a telephone according to an embodiment of the present invention.

FIG. 3 is a flowchart diagram for a transfer operation according to an embodiment of the present invention.

FIG. 4 is a diagram showing an announcement content set in a voice synthesis circuit according to an embodiment of the present invention.

FIG. 5 is a diagram showing a storage table provided in a storage device according to an embodiment of the present invention.

FIG. 6 is a flowchart diagram for a transfer operation according to an embodiment of the present invention.

FIG. 7 is a flowchart diagram for transfer setting according to an embodiment of the present invention.

FIG. 8 is a flowchart diagram for a transfer operation according to an embodiment of the present invention.

[Explanation of symbols]

1a, 1n ... Telephone, A ... Electronic exchange, 3 ... Communication network (SW), 6 ... Control processing unit (CC), 7 ... Storage device (MEM), 9 ... Tone circuit, 10 ... PB signal receiving circuit, 11 ... a voice synthesis circuit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Uemura 1-3-1, Asahigaoka, Hino City, Tokyo 1 Toshiba Toshiba Communication Systems Engineering Co., Ltd.

Claims (10)

[Claims] 1. An electronic exchange system comprising an electronic exchange to which a plurality of telephones are connected, wherein the telephone has dial input means capable of inputting a plurality of dial information for receiving an incoming call to another telephone. The electronic exchange includes: an information storage unit that stores a plurality of dial information input by the dial input unit; an information search unit that searches one of the stored dial information; When the calling means for calling the corresponding receiving side telephone and the telephone line formed between the telephone corresponding to the called dial information and the electronic exchange are disconnected, the dial retrieved previously by the calling means is called. An electronic exchange system characterized by having control means for retrieving dialing information other than the information, and as a result, sequentially calling the telephone set. Beam. 2. The electronic exchange system according to claim 1, wherein the information retrieval means retrieves the dial information by putting a telephone set on the calling side and an electronic exchange on hold. 3. The electronic exchange system according to claim 1, wherein the other telephone is called according to a storage order of dial information stored in the information storage means. 4. An informing means for informing that the electronic telephone cannot receive an incoming call from the electronic exchange when the other telephone called by the calling means cannot be called. Electronic exchange system as described. 5. The electronic exchange system according to claim 4, wherein the notification by the notification means is performed by a busy tone. 6. The electronic exchange system according to claim 4, wherein the notification by the notification means is performed by an announcement generated by voice synthesis. 7. When the calling means cannot call the other telephone, the information retrieval means retrieves another dial information different from the dial information corresponding to the telephone from the information storage means. Claim 1 characterized by the above-mentioned.
Electronic exchange system as described. 8. An electronic exchange system comprising an electronic exchange to which a plurality of telephones are connected, and a line holding means for putting a call line formed between a calling side telephone and a receiving side telephone on hold with respect to the electronic exchange. And a dial input means of the receiving side telephone for inputting one or a plurality of desired transfer destination dial information when the call line is held, and an information storage for storing one or a plurality of transfer destination dial information inputted from the dial input means. Means, an information retrieval means for retrieving the transfer destination dial information input first from the one or a plurality of transfer destination dial information, and either the calling side or the receiving side telephone disconnected the call line. In this case, based on one or a plurality of transfer destination dial information stored in the information storage means, a call from the calling side telephone to another transfer destination telephone is transmitted. An electronic exchange system comprising a destination transmitting means. 9. The electronic exchange system according to claim 8, wherein the disconnection information generated when the telephone line is used is an on-hook signal generated by the called telephone. 10. When the transfer destination calling means completes the transfer to the transfer destination telephone, the transfer destination dial information corresponding to the transfer destination telephone is deleted from the information storage means. The electronic exchange system according to claim 8.