JP2808477B2 - Phone confidential transfer connection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention is intended to ensure that a caller passes a person to a called party in an incoming connection, an outgoing connection, a pager transfer connection, etc. of an exchange. And a method of connecting directly without making any calls.

(Prior Art) In the incoming connection in a conventional exchange, a telephone number is generally given to each organization without giving a different telephone number to each employee. For this reason, the called party intended by the calling party does not always answer first, and it is normal for a person other than the called party to answer once and take over to the called party.

(Problems to be Solved by the Invention) In the conventional system, it is often the case that the called party who is the target of the calling party does not answer first, and a person other than the called party answers once and takes over to the called party. Was. This means that for the caller,
In addition to the inconvenience, there has been a problem that a part of the contents of the call and the name of the caller are leaked to the third party who has made the primary response.

In addition, even if different telephone numbers, that is, different telephones are assigned to each employee, the same problem occurs when the employee who is the called party is absent after all, and the same problem occurs. Disadvantage has also been encountered.

Furthermore, even if the called party is present and gives the first response (primary response), there is also a danger that the contents of the call may be intercepted on a transmission line (wired or wireless) on the way.

An object of the present invention is to provide a secure telephone transfer connection method that solves these problems.

[Configuration of the invention]

(Means for Solving the Problems) In order to simplify the explanation, terms defined as follows are used.

(PB signal)

A signal called a DTMF (Dual Tone Multi-Frequency), and an AC signal obtained by combining one of the high group frequency and the low group frequency as shown in FIG. 16 is called a PB signal.

[Basic telephone, parasitic telephone]

Of telephones that are wired or wirelessly connected to the exchange, they are mainly installed at places where specific users are present,
In addition, a telephone frequently used by the specific user is named a basic telephone (T0), and telephones other than the basic telephone are named a parasitic telephone (T1).

(MN, IN, KN)

MN assigns a different unique employee number to each specific user
(A number to be dialed when making a call to a specific user, and there may be a plurality of MNs on one telephone), and a password corresponding to the MN on a one-to-one basis is named IN,
A key number corresponding to the MN on a one-to-one basis is designated as KN.

[Recording card]

The card on which the MN, IN, and KN are recorded is referred to as a recording card.

[MN card]

After distributing the recording card to a specific user, the recording card is named an MN card. IC cards are included in MN cards.

[TN0, TN1] The telephone number of the basic telephone for each specific user is named TN0, and the telephone number of the parasitic telephone to which the specific user transfers and receives an incoming call to his / her own MN is named TN1.

(First Means) The telephone secure transfer connection system according to the present invention is a system comprising a basic telephone (T0), a parasitic telephone (T1), an exchange (1) and a recording card (500). ) Is provided with a display device (204) and a card reader (205). The recording card (500) has an employee number (MN) unique to a specific user, a personal identification number (IN), and a key number (KN). ) Is recorded and distributed to each specific user. The exchange (1) has a basic number corresponding to the employee number (MN), personal identification number (IN), key number (KN) and employee number (MN). The telephone number (TN0) of the telephone (T0) and the parasitic telephone (T
A connection file that records the telephone number (TN1) of 1) is installed. The specific user enters his / her recording card (500) into the card reader (205) and enters his / her personal identification number (IN) into the telephone ( T0 or T1) Manually input from other accessories, and confirm by machine that the personal identification number (IN) in the recording card (500) and the manually input personal identification number (IN) are the same. T1) The telephone number (TN) of the parasitic telephone (T1) in the connection file by manual input from other accessories
1) can be changed. When the telephone number (TN1) of the parasitic telephone (T1) in the file is blank, the incoming call addressed to the employee number (MN) is terminated at the basic telephone (T0), When the telephone number (TN1) of the parasitic telephone (T1) has been entered, the entered telephone number (T1)
N1), the incoming call is transferred to the parasitic telephone (T1). When the incoming call to the parasitic telephone (T1) causes the call signal transmission state to continue for a certain period of time or more, the incoming call is transmitted to the basic telephone belonging to the specific user. (T0) is forcibly forwarded.

(Operation) Give a unique employee number (MN) that is different for each employee in the exchange, and print this MN as a telephone number on business cards and distribute it. Give a different telephone number (TN0) to each organization to which employees belong, and set up a telephone (basic telephone) corresponding to this.

A display for displaying the employee number MN dialed by the caller to the telephone, the employee name corresponding to the MN, or either the MN and the name during the call before answering, and a card reader for reading the MN card are provided.

MN, PIN IN, TN0, key number KN unique to each employee
Employee card (IC card, magnetic card, optical card, bar code card, etc., electronic or magnetic, electrostatic, mechanical, optical, or any of these) A card that is recorded in one or more combinations and is invisible except for MN) is distributed.

In the exchange, a connection file describing MN, TN0, KN, TN1 (transfer destination telephone number) and IN is provided for each employee.

A circuit for encrypting and decrypting KN as a key number is provided in the extension trunk and telephone of the exchange.

When the employee leaves, the employee inserts the employee card into the telephone and registers the telephone number of the destination telephone (parasitic telephone) as TN1 in the exchange.

When a telephone call arrives at the employee, the exchange looks at the connection file and connects to TN1, but before sending out the ringing tone, the telephone display shows either the MN of the called party or the employee name corresponding to the MN or either the MN and the full name I do.

MN and MN on the display of the telephone whose called party is TN1
Check the display of either the employee name or MN and the name corresponding to, confirm the incoming call to yourself, insert your card into the card reader and respond.

The telephone is exchanged between the telephone and the exchange by using the key number KN as a key to encrypt / decrypt the call.

In the above, if the called party does not answer even if the ringing tone of TN1 is ringing for a certain period of time, the exchange rings the ringing tone of the telephone of TN0 and makes the third party answer. (In this case, encryption / decryption of the call is not performed.) Periodically (for example, 20:00 every day)
Erase TN1 to forcibly release the transfer state.

(Embodiment) The present invention is applicable to all types of exchanges.
Hereinafter, the case of a private branch exchange (PBX) will be described as an example.

The employee number (MN), personal identification number (IN), and key number (KN) of the specific user are recorded on the MN card according to the present invention, but the IN and KN other than the MN are invisible electronically or magnetically. , Or electrostatic, or mechanical or optical means,
Or by combining any one or more of these, the reading means of the MN card and the MN card reader may be electronic, magnetic, or electrostatic, or mechanical, or optical, or any of these. A means based on one or more combinations is used. In the following description, an IC card and an IC card reader will be described as examples.

 An embodiment of the present invention is shown in FIGS.

FIG. 1 shows a private branch exchange (PBX) as an embodiment of the present invention.
Is shown.

In FIG. 1, reference numerals 10 and 11 denote public telephone lines, reference numeral 20 denotes an incoming line trunk of a private branch exchange (PBX), and reference numeral 21 denotes an outgoing line trunk of a private branch exchange (PBX). 30 is a private branch exchange (P
BX) exchange switches, 40,41,60 are extension circuits (possible outgoing / incoming calls)
And performs network control on the extension side.

Reference numeral 31 denotes an extension trunk, which is inserted between 40 and 41 via extension 30 in the case of extension interconnection, and performs supply of call current and monitoring of disconnection.

Extension telephones 50 and 51 are connected to extension circuits 40 and 41 of a private branch exchange (PBX).

A wireless extension telephone main unit 70 is connected to the extension circuit 60. Reference numeral 80 denotes a wireless extension telephone, which is wirelessly coupled to the main device 70 via a main device antenna 71 within a certain range around the main device 70, and is known under the name of an office cordless telephone or the like. It is obtained by adding a function according to the present invention to the above.

Reference numeral 90 denotes an encryption / decryption trunk for encrypting / decrypting a voice by a key number (KN) in the connection file device 120, and cooperates with the encryption / decryption unit 203 of the extension telephone shown in FIG. To encrypt and transmit the audio.

Reference numeral 100 denotes a hold trunk for holding the calling side during a call or the like.

Reference numeral 120 denotes a connection file device which defines connection conditions for calls.

In this embodiment, the connection file 120 is installed inside the private branch exchange (PBX), but the interface is matched with the private branch exchange (PBX) so that the connection file is stored in an external computer having an information path capable of mutually exchanging information. May be provided.

130 is a paging transmitter for calling a pager (pager) via the antenna 131.

 150 is a voice mail (VMM).

110 is a central control unit (CC) that controls these devices via a memory bus 140.

Reference numerals 160 and 161 denote private branch exchange (PBX) extensions, which connect the extension circuit 40 to the extension telephone 50 and the extension circuit 41 to the extension telephone 51.

Reference numeral 170 denotes a signal transmission / reception unit that transmits a PB signal, a calling signal, a specific activation signal, a busy tone, a ringing tone, and the like, and receives the PB signal.

FIG. 2 shows the configuration of the extension telephones 50 and 51 of FIG. In FIG. 2, reference numeral 160 denotes an extension of a private branch exchange (PBX), 201 denotes a line control signal transmission / reception unit for controlling the extension / reception line for the extension circuits 40 and 41, and a dial signal (PB / PB) from a dial handset communication circuit unit 202. Signal) to the signal transmitting / receiving unit 170 via the extension circuits 40 and 41 in the private branch exchange (PBX),
Also, it receives a calling signal, a PB signal, and a specific activation signal from the signal transmitting / receiving unit 170 via the extension circuits 40 and 41. Also, when a specific activation signal is received, for a certain period of time before the arrival of the call signal, "with / without message on VM""MN and full name kanji code""confidential call / whether or not""TN1 (however, transmission from a parasitic telephone) Information only at the time of registration) "can be received by PB signal.

203 is an encryption / decryption unit, 204 is a display, 205 is an IC card reader, 206 is a call signal unit (bell), 209 is a call lamp, 210 is a confidential lamp, 211 is a transfer registration lamp, 213 is a message lamp, 207 Controls various devices via the memory bus 212 by the CPU. 207 has therein a correspondence table with digitized kanji codes corresponding to kanji constituting the name as a read-only memory (ROM), and when a kanji code is sent from the line control signal transmitting / receiving unit 201, it will be corresponded from now on. It is converted to kanji and sent to the display 204, and displayed on the display 204 in kanji.

FIG. 3 shows the configuration of the wireless extension telephone 80 shown in FIG. 3. In FIG. 3, reference numeral 300 denotes a radio transmission / reception unit, which includes a telephone transmission / reception unit antenna 301 and a wireless extension telephone main device antenna 71 (FIG. 1).
And transmits and receives radio waves to and from the wireless extension telephone main unit 70 (FIG. 1).

The radio transmission / reception unit 300 is basically a private branch exchange (P
The function (wired) of the extension 160 of the BX) is performed wirelessly, and the interface for the line control signal transmitting / receiving unit 201 is exactly the same as that in FIG. 201 to 207 and 209 to 213 are the same as those in FIG.

FIG. 4 shows a connection file in the connection file device 120 of FIG. In FIG. 4, 400 is an employee number (MN), 401 is a personal identification number (IN) corresponding to MN 400 on a one-to-one basis, 402
Is a telephone number (TN0) of a basic telephone, which is an extension telephone number existing in the organization to which the employee belongs and assigned to a telephone (basic telephone) installed on a desk where the employee sits. The basic telephone may be used mainly by the employees, or may be jointly used by a plurality of employees.

When the employee is in another location A (for example, a conference room) and the transfer of an incoming call addressed to himself to the telephone at the location A is registered in the private branch exchange (PBX), the telephone at the location A (parasitic) is registered. Telephone number) (TN1).

404 is a key number (KN) used when the employee performs confidential communication.
Decoding is performed.

Reference numeral 405 denotes a message display (VM). If the message addressed to the employee can be recorded in the voice mail unit (VMM) 150, 1 is recorded, and if not, 0 is recorded.

Reference numeral 406 denotes a kanji code (hereinafter referred to as NLC) of the last name of the employee who owns the employee number (MN).

FIG. 5 shows the configuration of an IC card. In FIG. 5, 500 is I
It is a C card (MN card). 501 is a connection terminal part,
It is connected to the socket of the IC card reader 205 shown in FIG.

503, a storage unit; 502, a central processing unit (CPU);
03 is read via the memory bus 504 and transmitted to the connection terminal unit 501. Reference numeral 1511 displayed on 505 is an example of the employee number (MN) of the IC card owner, which is visibly printed on the card surface. The memory bus 504, the CPU 502, and the storage unit 503 exist inside the card and cannot be seen from the surface.

FIG. 6 shows a file in the storage unit 503 in the IC card.
The name of the person whom the C card owner frequently calls is 601
(NAME) has the other party's phone number in 600 (TN).

400 to 404 are the same as in FIG.
Only the owner of the card in the figure is shown.

7 to 12 are flowcharts for each connection or registration. 7 is a flowchart for incoming connection, FIG. 8 is a flowchart for outgoing connection, FIG. 9 is a flowchart for voice mail registration / cancellation, FIG. 10 is a flowchart for voice mail listening, and FIG. 11 is a flowchart for transfer registration. FIG. 12 is a flowchart of the pager transfer connection.

FIG. 13 is a screen example of the display 204 of the telephone (T0 or T1). FIG. 13 shows that TN0 (402) is 2121 and MN (40
This shows a case in which three employees whose 0) are 1511, 1512 and 1513 share this telephone as a basic telephone. (A) Of these, employees with MN = 1511 make calls directed to themselves to TN1 (60
0) was transferred to the 3521 telephone under the name KAI-I,
In the message display of 5, there is a message to the VM, (B) The employee of MN = 1513 is transferring TN1 (600) to the 9519 telephone, (C) The MN = 1512 That the call to the employee of the customer is arriving and the call destination display 700 shows that "MN is 1512
The name display 701 indicates that "the name is Nakayama".

Next, the operation of the embodiment of the present invention will be described. However, it is assumed that the following conditions are satisfied.

(I) Private branch exchange (PBX) that implemented the present invention for a certain company
Has been introduced.

(Ii) The IC card shown in Fig. 5 is distributed to all employees.

(Iii) The connection file is as shown in FIG.

(1) Incoming call connection In the following description, in FIG. 1, 50 will be described as a basic telephone with MN = 1511, and 51 as a parasitic telephone with MN = 1511.

FIG. 7 shows a flowchart of the incoming connection. The company's area code is 454. Dial-in phone number is 454-15
When a call is received from an outside line at 11 and enters the local line incoming trunk 20 (FIG. 1), the trunk 20 and the signal transmitting / receiving unit 170 (FIG. 1) are connected. When the signal transmitting / receiving unit 170 receives MN = 1511, the central controller 110 knows this and reads the connection file (FIG. 4) of MN = 1511.

If TN1 is a space in the connection file (Fig. 4), T
If N0 = 2121, it is sufficient to terminate the call. If TN0 is not busy, disconnect the signal transmission / reception unit 170 from the local line incoming trunk 20, connect the local line incoming trunk 20 and the hold trunk 100, and Keep 20 on hold.

Connection file when TN0 = 2121 is busy (Fig. 4)
In VM, since VM cannot be used when VM = 0, the busy tone is transmitted from the signal transmitting / receiving section 170 to the local line incoming trunk 20 and cut off. Also, when VM = 1, the VM can be used, so the local line incoming trunk 20 and the voice mail unit 150 are connected, and 150 records the message,
The caller disconnects. On the other hand, when the recording of the voice mail unit (VMM) is completed, the central information processing unit 110 confirms that TN0 is empty, and sends a specific activation signal from the signal transmitting / receiving unit 170 to the line control signal transmitting / receiving unit 201 to the basic telephone 50 of TN0. Sends the line control signal transmitting / receiving unit 201 for a certain period of time to a PB signal receivable state, sends information of `` there is a message by VM '' to the line control signal transmitting / receiving unit 201 by a PB signal, ignites the message lamp 213, and displays At 204, the message display 405 is set to 1 to indicate that the message is in the voice mail section (VMM). The employee of MN = 1511 sees this and listens to the contents of the voice mail according to the flowchart of FIG.

Now, if TN0 is not busy, the signal transmitting / receiving section 170 and the extension circuit 40 to which the basic telephone of TN0 is connected are connected, and the signal transmitting / receiving section 170 sends a specific activation signal to the line control signal transmitting / receiving section 201 of the extension telephone 50. After the transmission, the MN = 1511 and the kanji code (NLC) 406 corresponding to the kanji of the last name of the employee in the connection file (FIG. 4) corresponding to the employee number, that is, 2561,5541 from the signal transmitting / receiving section 170 in the PB signal format. It is sent to the extension telephone 50 via the extension circuit 40.

In the extension telephone 50, after the line control transmission / reception unit 201 receives the specific activation signal, the PB signal can be received for a certain period of time. Therefore, the kanji code (NLC) corresponding to MN = 1511 and the kanji of the last name of the employee is used. ) Is received as a PB signal, which is converted by the CPU 207 to display MN = 1511 and “Nakayama” on the display 204 (700 and 701 in FIG. 13). Since the kanji code (2561) is described as "medium" and the kanji code (5541) is described as "mountain" in the ROM in the CPU 207, the CPU 207 converts the character to "nakayama".

Subsequently, the calling signal is transmitted from the signal transmitting / receiving
, The call lamp 209 flashes, and the call bell at 206 rings.

In addition, the kanji code of MN = 1511 (256
When 1/5541) is sent to the extension telephone 50, the key number KN in the connection file (FIG. 4) is K (a signal indicating whether or not confidential communication is performed) = 0 if the key number KN is a space, and if it is not a space. Since the signal of K = 1 is sent to the extension telephone 50 at the same time as the PB signal, it is determined that the call is confidentially registered at K = 1.
After the determination by the CPU 207, the secret lamp 210 is ignited.

The "Nakayama" employee with MN = 1511 sees this, inserts the IC card into the IC card reader 205, and enters the personal identification number (IN), and the CPU 207 checks whether "IN in the IC card = input IN". . In this case, MN = 1511
If the IN corresponding to has been sent to the extension telephone 50, the input IN
= It is also possible to check whether or not IN in the connection file, but in the following description, it is assumed that only the check as to whether "IN in IC card = input IN" is performed.

When the employee responds, the encryption / decryption trunk 90 is inserted between the extension circuit 40 and the local line incoming trunk 20, and the encryption / decryption unit 203 is connected to the line control signal transmitting / receiving unit 201 and the dial handset communication circuit unit. Private branch exchange (P
BX) extension 160-line control signal receiving section 201-encryption / decryption section 203-dial handset telephone circuit section 202 and IC
With the key number KN = 192 written on the card as a key, encryption is performed at the transmitting end and decryption is performed at the receiving end to make the call confidential.

However, encryption and decryption are performed on a digital basis. Therefore, there is no problem in the case of a digital private branch exchange (PBX), but if the extension section is an analog system, the A / D conversion is performed in the encryption / decryption trunk 90 and the encryption / decryption unit 203 to perform encryption / decryption. And D / A conversion is required.

When the ringing ring 206 is ringing and K = 0 (when there is a space), MN = 151 in the dial handset communication circuit section 202.
When one employee answers, the inner edge circuit 40 and the local line incoming trunk 20
Is connected and a call is made. Connection file (Fig. 4)
When TN1 is not a space, it is a transfer connection and TN1 = 35
If it is assumed that 21, the telephone (parasitic telephone) 50 of TN1 is not busy, the signal transmitting / receiving unit 170 and the local trunk 20 are disconnected, and the hold trunk 100 and the local trunk 20 are connected. Next, transfer incoming to the parasitic telephone will be described.

First, when the telephone number TN1 = 3521 of the parasitic telephone is busy, the busy tone is output from the signal transmitting / receiving unit 170 to the local line incoming trunk 20.
Sent to

Next, when TN1 = 3521 is empty, the signal transmission / reception unit 170 and the extension circuit 41 are connected, and after the specific activation signal is transmitted from the signal transmission / reception unit 170 to the line control signal transmission / reception unit 201 of the extension telephone 51, whether or not confidential communication is performed. K (K = 1 or 0) and MN =
1511, the kanji code (2561, 5541) is transmitted from the signal transmitting / receiving unit 170 to the extension telephone 51 via the extension circuit 41 as a PB signal. The extension telephone 51 displays MN = 1511 and “Nakayama” on the display 204 (displayed at positions 700 and 701 in FIG. 13),
When K = 1, the secret lamp 210 is ignited. Further, since a call signal is transmitted from the signal transmitting / receiving unit 170 to the extension telephone 51, the call lamp 209 of the extension telephone 51 blinks in response to this, and the call bell of 206 rings.

Regardless of K = 1 or K = 0, if there is no answer after a call for a fixed time, the extension telephone 50 corresponding to the basic telephone of TN0 and the signal transmitting / receiving unit 170 are connected, and the extension telephone 51 is disconnected.
The extension telephone 50 is called. After that, the processing is the same as the processing of TN1 = space (no transfer). If the employee of MN = 1511 responds to the parasitic telephone within a certain period of time, input the IC card and IN to the extension telephone 51 if K = 1 before responding.
After checking whether IN in the IC card = input IN or not and responding, the encryption / decryption trunk 90 is inserted between the extension trunk 41 and the local line incoming trunk 20 and the encryption / decryption unit 203 is inserted.
Is inserted between the line control signal receiving unit 201 and the local line incoming trunk 20, and the call is confidential by encrypting and decrypting each with the key number KN = 192 as the key.

When K = 0, the extension circuit 41 and the central office incoming trunk 20
Is connected and a call is made. Next, the specific activation signal will be described.

From the signal transmitting / receiving unit 170 to the line control signal transmitting / receiving unit 201 (in the case of an incoming connection) “Message is / is not present in VM (expressed as ## 1)” (for example, ## 11 (presence) / 0 (absence)) ( (Displayed when a message is registered on the basic telephone) "MN and Kanji code (expressed by ## 2)" (for example, ## 2, 1511 (MN), 2561 (medium), 5541 (mountain)) , Displayed on a parasitic telephone when receiving an incoming call) "K (expressed as ## 3) confidential / non-proprietary" (for example, ## 31 1 (confidential) / 0 (no)) (Basic, displayed on a parasitic telephone when receiving a call) (For transfer registration) "TN1 (represented by ## 4) (for example, ## 4,1511 (MN), 5555 (TN1)) (displayed on the basic telephone when transfer registration from a parasitic telephone to the new TN1), etc. The line control signal transmission / reception unit 201 of the telephone has a PB reception function because it is necessary to send the PB signal as a PB signal. Before sending these PB signals from line 70 to line control signal transmitting / receiving section 201, line control signal transmitting / receiving section 201 sets extension telephone 50 in an unanswered state (signal transmitting / receiving section 1).
It is necessary to prepare the line control signal transmitting / receiving unit 201 so that it can be received during a fixed time (before the call signal is transmitted from the terminal 70 to the extension telephone 50). The signal for preparing for this is a specific activation signal, which is higher in frequency (for example, 3 KHz) than a general call signal and is constant intermittent (for example, 0.2 seconds off, 0.4 seconds off). This is transmitted from signal transmitting / receiving section 170 to line control signal transmitting / receiving section 201.

FIG. 14 is a detailed view of a part of the line control signal transmitting / receiving section.
In FIG. 14, a line control signal transmitting / receiving unit 201 and a memory bus 212 are the same as those in FIGS. 2 and 3. 2011 is a transformer with small reactance that does not affect the line, and takes in a specific start signal from here. 2012 is 3KHz for example
For a certain period of time only when the detection amplifier and its output that detects only the frequency of the signal and amplifies it and converts it to direct current and the output repeats for a certain period of time, such as 0.2 seconds in contact and 0.4 seconds off, that is, “Message is / is not present in the VM” “MN This is an extractor consisting of a fixed-period detector that outputs the voltage to the output lead 2013 for the minimum time to receive signals such as “Kanji code” and “K secret / no” or “TN1”. 2014 receives the output 2013 voltage and opens the gate to open the PB signal receiver 20
15 is a gate connecting the line section.

 The above is the operation of the specific activation signal.

(2) Outgoing connection FIG. 8 shows a flowchart of the outgoing connection. The telephone may be a basic telephone or a parasitic telephone. If an employee with MN = 1511 calls from 50 extension telephones and wants confidential communication, the IC card that he / she has in advance and the key number KN corresponding to MN = 1511 in the connection file (FIG. 4) are not spaces. That is, it is necessary that this employee (MN = 1511) is confidentially registered. If the confidential information is not registered, the call will be forced to a general call.

By the way, if you want to make a confidential call, use your IC card and PIN
When IN is input, the CPU 207 checks that “IN in IC card = input IN”. Then the line control signal transmission / reception unit
201 transmits MN = 1511 to the signal transmitting / receiving unit 170 via the extension circuit 40 as a PB signal.

In response to this, the central control unit 110 searches the connection file (FIG. 4) for the employee number MN = 1511, confirms the key number KN key = space, and then makes an intermittent dial tone (intermittent dial tone). From the signal transmitting / receiving unit 170 to the extension telephone 50.

The employee with MN = 1511 hears the intermittent dial tone and dials the other party's phone number. Also, at this time, if the key number KN = space in the connection file (FIG. 4), the busy tone is transmitted from the signal transmitting / receiving section 170 to the extension telephone 50.
= 1511 employees make calls other than confidential calls.

In this case, if the line control signal transmission / reception unit 201 also sends the input IN to the signal transmission / reception unit 170 via the extension circuit 40, the central controller 110 checks whether or not “input IN = IN in connection file”, If “input IN ≠ IN in connection file”, it is possible to prohibit confidential communication. However, in the following description, only checking whether “IN in IC card = input IN” is performed.

On the other hand, the central control unit 110 knows the key number KN = 192 in the connection file (FIG. 4), and
Send to Then, when the other party answers, the encryption / decryption trunk 90 is inserted between the extension trunk 40 and the local line termination trunk 20, and encryption / decryption is performed between the line control signal transmission / reception unit 201 and the dial handset communication circuit unit 202. A secrecy call is performed by inserting the unit 203 and performing encryption / decryption by using the key number KN = 192 as a key.

If a confidential call is not to be made, a general call is made by dialing the telephone number of the other party.

In the outgoing connection, even if the call is a confidential call or a non-confidential call, when the other party is on the office line, the connection is made via the office line calling trunk 21.

(3) Voice Mail Registration / Unregistration FIG. 9 shows a flowchart of voice mail registration / unregistration. () Indicates the case of cancellation of registration. MN =
1511 employees send their own e-mail to the voicemail department (15
The following describes a case where voice mail registration is performed so as to be recorded in 0).

In FIG. 9, when the user dials # 0 # (# 1 #) from the extension telephone 50 and inputs the IC card and the password IN, the CPU 2
Check that 07 is “IN in IC card = input IN” and then send and receive the line control signal
201 automatically sends an employee number 1511 to the signal transmitting / receiving unit 170. The central controller 110 confirms that the employee number MN = 1511 exists in the connection file (FIG. 4), and changes the message display VM in the connection file (FIG. 4) to VM = 1 (VM = 0). And The signal transmitting / receiving section 170 notifies the extension telephone 50 of the result to the extension telephone 50 via the extension circuit 40 by an intermittent dial tone.

(4) Voice Mail Listening FIG. 10 shows a flowchart of voice mail listening.
A case in which an employee of MN = 1511 listens to an e-mail addressed to himself from the extension telephone 50 will be described. The employee has a basic telephone (TN0 = 2
After confirming that the message lamp 213 of 121) is lit, dial # 3 # and enter the IC card and the password IN. The CPU 207 confirms that "IN in IC card = input IN". After checking, the line control signal transceiver
201 automatically sends MN = 1511 to the signal transmitting / receiving unit 170 via the extension circuit 40.

The central control unit 110 obtains MN = 151 in the connection file (FIG. 4).
Check the existence of 1 and VM = 1. Thereafter, the employee of MN = 1511 listens to the message from the voice mail section (VMM), and the message lamp 213 of the basic telephone (TN0 = 2121) is extinguished.

(5) Transfer Registration FIG. 11 shows a flowchart of transfer registration. Transfer registration can be performed from any telephone, but the transfer destination display of the registration result (FIG. 13) is output only from the basic telephone.

A flowchart in the case where an employee with MN = 1511 performs transfer registration using the telephone of the extension telephone 50 will be described below. When the employee dials # 4 # and enters the IC card and the personal identification number IN, the CPU 207 checks that "IN in the IC card = input IN", and then the line control signal transmitting / receiving section
201 provides MN = 1511 to the signal transmitting / receiving unit 170 via the extension circuit 40
Automatically transmitted by PB signal. Then, the central control unit 110 confirms the existence of MN = 1511 in the connection file (FIG. 4), and sends an intermittent dial tone indicating registration acceptance from the signal transmitting / receiving unit 170 to the extension telephone. MN1511 employees listen to it 35
When dialing 21, the central controller 110 sets the telephone number TN1 of the parasitic telephone having MN = 1511 in the connection file (FIG. 4) to 3
521.

At this time, if the registration is not from the basic telephone, the central controller 110 looks at TN0 = 2121 in the connection file (FIG. 4),
A specific activation signal is transmitted from the signal transmitting / receiving unit 170 to the basic telephone (2121), and the line control signal transmitting / receiving unit 201 receives MN = 151.
1, letting TN1 = 3521 be received and displaying 204 with MN = 151
1, TN1 = 3521 is displayed.

When the transfer is registered from the basic telephone, MN = 1511, TN1 = 3521 is displayed on the display 204, and NAME = KAI corresponding to TN = 3521 (600 in FIG. 6) in the IC card.
-I (601 in FIG. 6) is displayed on the display 204. Thereafter, the signal transmitting / receiving unit 170 sends an intermittent beep to the extension telephone 50 to the effect that transfer registration has been completed.

(6) Connection for pager transfer FIG. 12 shows a flowchart of pager transfer connection. If the transfer destination is a pager in the transfer registration shown in FIG. 11, the pager is called.

In the following, the pager phone number is assumed to be 9519 and the fourth
In the figure, the flow will be described on the assumption that an employee with MN = 1513 has registered as TN1 = 9519 (pager).

It is assumed that 1513 arrives at the local line incoming trunk 20. The central control unit 110 connects the curved incoming trunk 20 and the hold trunk 100, determines TN1 = 9519 as a pager in the connection file (FIG. 4) (assuming that 9000 units are predetermined as pagers), and transmits paging. The device 130 is instructed to emit a radio wave calling 9519.

Next, the central controller 110 sends the paging transmitter 130 an MN.
= 1513 and the accommodation position of the local line trunk 20 are instructed to be stored. A pager call signal causes an employee at MN = 1513 to dial # 5 # from the nearest extension phone 50 and enter IC
After inputting the card and the password IN, the CPU 207 checks that “IC in the IC card = input IN”,
1 automatically sends MN = 1513 to the signal transmitting / receiving unit 170 via the extension circuit 40. The central controller 110 receives this, confirms that the caller has not been disconnected, confirms the accommodation position of the local line incoming trunk 20 in the paging transmitter 130 and MN = 1513,
The incoming line trunk 20 and the extension circuit 40 are connected to make a call.

(7) Connection to the wireless extension telephone The interface between the extension circuit 60 and the wireless extension telephone main unit 70 in FIG. 1 viewed from the side 60 is the same as the interface viewed from the extension circuit 40 and the extension telephone 50 side 40. is there. Also, the radio wave transmitting / receiving unit 300 and the line control signal transmitting / receiving unit 201 shown in FIG.
Since the interface viewed from the 201 side is also the same as the interface viewed from the 201 side between the extension circuit 40 and the line control signal transmitting / receiving unit 201, the wireless-specific connection between the wireless extension telephone main unit 70 and the antenna 301 Is connected by a known technique, the connection flow is the same as the connection between the extension circuit 40 and the extension telephone 50.

Therefore, the above (1) (2) (3) (4) (5) (6)
The connection flowchart of each item is similarly established in the case of (7).

Although the above embodiment has been described with reference to an analog exchange, it is apparent that the present invention can be applied to a digital exchange.

(8) Confidential transmission FIG. 15 is a diagram showing a confidential transmission relationship in a telephone call in the state where the extension telephone 50 and the extension telephone 51 are interconnected with each other as an embodiment of the present invention.

In FIG. 15, the extension telephone 50 is used by an employee with MN = 1511, and the extension telephone 51 is used by an employee with an employee number MN = 1512. In the connection file (FIG. 4), the key number KN = 192 for the employee number MN = 1511 and the key number KN = 981 for the employee number MN = 1512 are registered.

Therefore, before starting the call, the central control unit 110 checks the connection file (FIG. 4), and stores the key numbers in the decryption unit 901 and the encryption unit 902 in the encryption / decryption trunk 90 on the extension telephone 50 side.
KN = 192 is transferred, and key numbers are assigned to the decryption unit 901 and the encryption unit 902 in the encryption / decryption trunk 90 on the extension telephone 51 side.
KN = 981 is being transferred.

Employees with MN = 1511 must insert an IC card before calling
The CPU 207 reads the key number (FIG. 6) KN = 192 (the KN in the IC card of the employee with the employee number MN = 1511 is 192) in the IC card since it is inserted into the IC card reader 205 of 50. It is sent to the encryption unit 2031 and the decryption unit 2032 in the encryption / decryption unit 203 in the extension telephone 50.

Similarly, the employee with the employee number MN = 1512 also inserts the IC card into the IC card reader 205 of the extension telephone 51 before calling, so the key number (FIG. 6) KN = 981 in the IC card is stored in the CPU 207.
Reads it and encrypts / decrypts it in the extension phone 51.
It is sent to the encryption unit 2031 and the decryption unit 2032 in 203. Reference numerals 160 and 161 denote extensions of a private branch exchange (PBX). In this case, a four-wire system is used in which uplink and downlink are separated. In the case of the two-wire system, a hybrid is installed on the telephone side and the private branch exchange (PBX) side so that the encryption / decryption unit 203 and the encryption / decryption trunk 90 are four-wire systems. I just need.

In the above embodiment, the transmission section (the encryption / decryption unit 203
And between the encryption / decryption trunk 90) shows a digital case.

In the case of analog, the encryption / decryption unit 203
A / D and D / A conversion may be performed on the decoding trunk 90 in the line direction.

In FIG. 15, the line control signal transmission / reception unit 201 existing between the encryption / decryption unit 203 and the dial transmitter / receiver communication circuit unit 202 is omitted. Is negligible.

Now, the transmission of the employee with MN = 1511 enters the encryption unit 2031 of the encryption / decryption unit 203 as a digital signal, where the key number KN
= 192, a certain encryption operation (for example, [sending × KN], that is, multiplying binary sending information by KN = 192 in a binary format in a binary format) and a private branch exchange (PBX) The information of [transmission × KN] is sent to the extension 160. This is received by the decryption unit 901 in the encryption / decryption trunk 90, and a predetermined inverse decryption operation (for example, transmission ÷ KN, ie, binary transmission [transmission × KN] is converted to binary transmission KN) = 192 in the binary format), only the transmission remains and this is transmitted to the encryption unit 902 in the encryption / decryption trunk 90 on the extension telephone 51 side.
Send to

The encryption unit 902 in the encryption / decryption trunk 90 of the extension telephone 51 performs the same encryption operation with the key number KN = 981 of MN = 1512, and sends it to the private branch exchange (PBX) extension 161. Similarly, in the encryption unit 2032 of the encryption / decryption unit 203 of the extension telephone 51, if the decryption inverse operation is performed with the key number KN = 981, the original transmission is made and the dial handset communication circuit of the extension telephone 51 becomes Sent to the unit 202, the employee of MN = 1512 can receive this.

The same applies to the process in which the transmission of the employee of MN = 1512 on the extension telephone 51 side becomes the reception of MN = 1511. In such a transmission, even if these [sending × KN] codes are intercepted in the middle of a private telephone (PBX) extension 160, 161, the key number KN is unknown, so that the inverse decoding operation of the original transmission cannot be performed and the confidentiality is protected. .

The above confidential transmission process is performed by the private branch exchange (PBX) extension 16
Basically, the same applies when 0,161 is a wireless type,
The only difference is that the radio transmission / reception unit 300 of FIG. 3 exists between the encryption / decryption unit 203 and the private branch exchange (PBX) extension 160.

[Effects of the Invention] The present invention is configured as described above, and has the following effects.

(1) By practicing the present invention, the incoming MN is displayed on the display, so that a single telephone can be shared by a plurality of employees as a basic telephone or a parasitic telephone. Furthermore, if the transfer function is used, the caller's intended employee can always make a primary response, and there is no response by the third party, and confidentiality is maintained. For this reason, the caller is given a good impression, and the work of making a telephone call can be labor-saving, and the efficiency of telephone use can be improved.

(2) Since the key number KN in the MN card and the KN of the file in the private branch exchange (PBX) can be maintained at the same value, the key number KN can be used as a key for encryption / decryption, so that the transmission section can be relatively easily performed. In addition to preventing interception of communications, confidential transmission becomes possible. In particular, the effect of preventing call interception in a wireless device is great.

(3) The response from the parasitic telephone in the transfer state is always a response in a place where the user is not present, and the reliability of the response is reduced. There is also an advantage that the certainty of the response can be improved by the response and the periodic automatic transfer cancellation (prevention of forgetting the transfer, etc.).

[Brief description of the drawings]

1 is a block diagram of a private branch exchange (PBX) according to an embodiment of the present invention, FIG. 2 is a block diagram of an extension telephone (50, 51) of FIG. 1, and FIG. 3 is a wireless extension telephone of FIG. (80) configuration diagram,
FIG. 4 is a diagram showing a connection file in the connection file device (120) of FIG. 1, FIG. 5 is a configuration diagram of an IC card according to an embodiment of the present invention, and FIG. 6 is an IC card of FIG. FIG. 7 is a diagram showing a file in the storage unit (503) in FIG. 7, FIG. 7 is an incoming connection flowchart according to the embodiment of the present invention, FIG. 8 is an outgoing connection flowchart according to the embodiment of the present invention, and FIG. Flow chart of voice mail registration / cancellation according to the embodiment, FIG. 10 is a voice mail listening flowchart according to the embodiment of the present invention, FIG. 11 is a transfer registration flowchart according to the embodiment of the present invention, and FIG. FIG. 13 is a diagram showing a screen example of the extension telephone display (204) in FIG. 2, and FIG. 14 is a diagram showing a line control signal transmitting / receiving section (201) in FIGS. 2 and 3. ) 1
FIG. 15 is a diagram related to confidential transmission according to an embodiment of the present invention, and FIG. 16 is an explanatory diagram of a PB signal. 1… Private branch exchange (PBX), 10,11… Public telephone line, 20
…… Trunk incoming trunk, 21 …… Traffic originating trunk, 30…
... Exchange switch, 31 ... Extension trunk, 40,41,60 ... Extension circuit, 50,51 ... Extension telephone, 70 ... Wireless extension telephone main unit, 71 ... Wireless extension telephone main unit antenna, 80 ...
Wireless extension phone, 90 ... Encryption / decryption trunk, 100
…… Holding trunk, 110 …… Central control unit (CC), 120…
… Connection file device, 130 …… Paging transmitter, 131…
… Paging transmitter antenna, 140 …… Memory bus, 150
…… Voice mail section (VMM), 160,161… Private branch exchange (PBX) extension, 170 …… Signal transmission / reception section, 200 …… Extension, 201
... Line control signal transmission / reception section, 202 ... Dial handset communication circuit section, 203 ... Encryption / decryption section, 204 ... Display, 205 ... IC card reader, 206 ... Paging signal section (bell), 207: CPU, 209: Call lamp, 210: Confidential lamp, 211: Transfer registration lamp, 212: Memory bus, 213: Message lamp, 300: Telephone transceiver, 301
… Electric wave transmitting / receiving antenna, 400 …… Employee number (MN), 401
…… PIN, 402 …… Phone number (TN0) of basic telephone,
403: Parasitic phone number (TN1), 404: Key number (KN), 405: Message display (VM), 406: Kanji code of the cardholder's last name, 500: Recording card (IC card) Etc.), 501 connection terminal section, 502 CPU, 503 storage section, 504 memory bus, 505 IC card owner MN number, 600 phone number, 601 name, 700 …… Employee number (MN), 701… Kanji display of the last name of the employee, 901 …… 90 (encryption / decryption trunk), 902… 90 (encryption / decryption trunk) Inside encryption section, 2011 …… Transformer, 2012 …… Extractor, 2013 …… Output lead, 2014 ……
Gate, 2015 ... PB receiver, 2031 ... Encryption section in 203 (encryption / decryption section), 2032 ... Decryption section in 203 (encryption / decryption section).

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04M 3/42 H04M 3/42 J 3/50 B H04Q 3/58 106 H04L 9/00 621A 3/50 673E H04Q 3/58 106 601E (72) Inventor Michihiko Hattori 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-63-232670 (JP, A) JP-A-1-292953 (JP, A) JP-A-1-1444757 (JP, A) JP-A-63-33054 (JP, A) JP-A-63-296454 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) ) H04M 3/42-3/58 H04Q 3/58-3/62

Claims (1)

(57) [Claims] 1. A system comprising a basic telephone (T0), a parasitic telephone (T1), an exchange (1) and a recording card (500), wherein said telephones (T0, T1) have a display device (204) and a card reader. (205), and the recording card (500) records an employee number (MN), a personal identification number (IN), and a key number (KN) unique to a specific user, and distributes them to each specific user. The exchange (1) includes a telephone number (TN0) of the basic telephone (T0) corresponding to the employee number (MN), personal identification number (IN), key number (KN), and employee number (MN). Telephone (T
A connection file that records the telephone number (TN1) of 1) is installed. The specific user enters his / her recording card (500) into the card reader (205) and enters his / her personal identification number (IN) into the telephone ( T0 or T1) Manually input from other accessories, and confirm by machine that the personal identification number (IN) in the recording card (500) and the manually input personal identification number (IN) are the same. T1) The telephone number (TN) of the parasitic telephone (T1) in the connection file by manual input from other accessories
1) can be changed. When the telephone number (TN1) of the parasitic telephone (T1) in the file is blank, the incoming call addressed to the employee number (MN) is terminated at the basic telephone (T0), When the telephone number (TN1) of the parasitic telephone (T1) has been entered, the telephone number (TN
1) When the incoming call to the parasitic telephone (T1) causes the incoming call to the parasitic telephone (T1) to be forwarded and continued for a certain period of time or longer, the incoming call is transmitted to the basic telephone belonging to the specific user. A telephone confidential transfer connection method characterized by forcibly transferring a call to (T0).