JP2852875B2 - Key telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key telephone apparatus in which a transfer box for transferring an external line call between external lines is accommodated between a main unit and a plurality of external lines.

[0002]

2. Description of the Related Art In general, a key telephone apparatus comprises a main unit for accommodating a plurality of outside lines and a plurality of key telephones accommodated in the main unit. When the main unit detects an outside line selection operation of the key telephone, it captures an outside line corresponding to this operation, and subsequently detects a dial operation of this key telephone, and sends a dial signal corresponding to the dial operation to the captured outside line. Call the other party. Then, in response to the other party's response, an outgoing call is made via the key telephone. On the other hand, when an incoming call arrives at any of a plurality of outside lines,
The main unit outputs to the key telephones respective instruction data of blinking of the corresponding external line lamp and ringing of the ring tone, and when detecting an incoming call response operation of any of the key telephones, captures the corresponding external line. As a result, an incoming call is made via the key telephone.

In recent years, a transfer function (for example, when an incoming call arrives at the outside line A, a transfer destination set in advance through the outside line B when a user of such a button telephone device uses an existing button telephone device as it is). There has been a frequent request to automatically send a telephone number and add a function of calling the outside line A and the outside line B according to the response of the transfer destination. The transfer function can be easily realized by connecting a commercially available transfer box to the key telephone device in response to such a request. Figure 11 is a diagram transfer box described above indicates an example that is connected between the main device 1 and the outside line 2 _1, 2 _2, the transfer box 9, the incoming detection circuit 91, the loop polarity inversion detection circuit 92, Transfer control circuit 93, setting switch 94, contacts 95 and 96 such as relay contacts, switch 9
Consists of seven.

[0004] Here, an outside line 2 ₁ transfer Chakugaisen, outside line 2 ₂ has been designated in advance as a transfer onset outside line. In this case, the transfer control circuit 93 when an incoming from the incoming detection circuit 91 and incoming call forwarding Chakugaisen 2 ₁ is informed, setting switch 94
Setting indicates the transfer mode, and transfers onset external 2 ₂ After confirming through the loop polarity reversal detection circuit 92 that is not used by the main apparatus 1 side, the transfer onset external contacts 96 controls and drives 2 ₂ capture, and outputs the transfer destination telephone number which is previously set in the setting switch 94 as a dial signal.
As a result, the transfer destination is called and the response of the transfer destination is looped.
When it is detected via the reversal detection circuit 92, the transfer control circuit 9
3, in response to the incoming call captures the drive control transfers Chakugaisen 2 ₁ contact 95, and controls the switch 97 to connect the speech channel transfer Chakugaisen 2 ₁ and the transfer onset external 2 _2. Thus, a transfer call via the transfer box 9 can be realized.

[0005]

However, the main unit of the key telephone apparatus does not have a dedicated communication interface with such a commercially available transfer box, and therefore, the main unit determines whether or not the transfer is being performed in the transfer box. Because the user does not know, the user performs an outside line selection operation to make an outside line,
At this time, if this outside line is used for transfer, there is no sound, so there is a problem that the user mistakenly thinks that the device has failed. On the other hand, there is a concept that an interface circuit (unit) dedicated to the transfer box is newly provided on the main device side, but there is a problem that the existing main device cannot accommodate a new interface circuit due to space. Therefore, the present invention does not provide a new interface circuit in the main unit of the key telephone apparatus, and uses the existing equipment of the main unit so as not to increase the space of the existing main unit. The purpose is to identify during transfer and notify the user.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention accommodates a plurality of external lines, and allows a single telephone to be connected by a first interface for connecting a key telephone and two lines. A main unit having a second interface having a detection unit for detecting the opening or closing of the two-line DC loop, and an incoming call arriving at the transfer incoming line out of the plurality of external lines is transmitted via the transfer outgoing line in advance. In a key telephone device provided with a transfer box for transferring to a set transfer destination, a transfer box and a second interface are connected by two wires, and the transfer box has a transfer detecting means for detecting that transfer is being performed. And a relay for opening or closing the DC loop with respect to the two wires, and controlling the relay so that the DC loop is normally closed and transferring by the transfer detecting means. Provided a relay control means for opening controlling the DC loop by the detection output of, and, in the main apparatus,
Identification means for identifying that transfer is in progress by detecting the opening of the DC loop by the transfer detection means, and display means for indicating to the key telephone that the transfer is in progress when the identification means identifies that the transfer in the transfer box is in progress. Are provided.

Further, when it is identified that the transfer is being performed in the transfer box, the respective lamps of the transfer incoming line and the transfer outgoing line of the key telephone are illuminated and displayed. In addition, the transfer box has a contact for connecting a transfer incoming line and a transfer outgoing line to the main unit and the transfer box at all times;
An audio signal generation circuit that outputs a predetermined audio message;
The contact is controlled by the detection output during the transfer by the transfer detecting means to disconnect the incoming line for transfer and the outgoing line for transfer from the main unit, and the terminal of the main unit to which the incoming line for transfer and the outgoing line for transfer are connected. And control means for connecting an audio signal generation circuit to the control signal. Transmitting means for transmitting, via the second interface, function setting information such as a transfer incoming line, a transfer outgoing line, and a transfer destination telephone number transmitted to the transfer outgoing line to the transfer box; Detecting means for detecting a predetermined setting operation of the key telephone, connecting a path between the first interface and the second interface according to the detection output of the detecting means, and controlling the transmitting means to respond to the operation of the key telephone. And control means for transmitting the function setting information.

[0008]

When the transfer detecting means detects that the transfer is in progress, the normally closed two-wire DC loop connecting the transfer box and the second interface of the main unit is opened, and the main unit is opened. The device is made to recognize that the data is being transferred, and the key telephone is displayed to indicate that the data is being transferred. As a result, the transfer of the transfer box can be identified on the main device side and the user can be notified that the transfer is in progress, without providing a new interface circuit in the main device of the key telephone device. If it is identified that the transfer is being performed in the transfer box, the respective lamps of the transfer outside line and the transfer outside line of the key telephone are lit.
As a result, without providing a new display means in the key telephone,
The fact that the transfer is in progress can be displayed. When the transfer detecting means detects that the transfer is in progress, the transfer incoming line and the transfer outgoing line connected to the main unit and the transfer box are always disconnected from the main unit, and the transfer incoming line and the transfer line are disconnected. The audio signal generation circuit is connected to the terminal of the main device to which the external transmission line was connected. As a result, a predetermined voice message can be sent to the user side when the user accesses the incoming and outgoing line being transferred from the main unit using the key telephone, and therefore, the user is notified that the transfer is in progress. Can be recognized. When a predetermined setting operation of the key telephone is detected, the path between the second interface and the key telephone is connected, and the function setting information such as the transfer outside line and the transfer destination telephone number based on the setting operation is transmitted to the transfer box. And let them register. As a result, the transfer box does not require a switch or the like for setting function setting information, so that the transfer box can be configured economically and the transfer control can be reliably performed on the transfer box.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 3 is a block diagram showing a schematic configuration of the key telephone apparatus according to the present invention.
When, ₁ and to 5 _m plurality of key telephone sets 5, a plurality of external line 2
₁ , 2 ₂ and the main unit 1, and each external line 2 ₁ , 2
_And a transfer box 7 for transferring an external call between the _two . By the way, the main unit 1 has the key telephone 5 ₁ described above.
In addition to 5 _m, a plurality of single telephones (not shown) can also be connected. Therefore, in the existing main unit 1, each single telephone interface for connecting each single telephone with two wires is provided. .

[0010] Then, among the single line telephone interface of the main apparatus 1, in this embodiment, configured as the transfer box 7 to terminal 6 ₁ of the single line telephone interface 21 alone phone is not connected is connected by two-wire I do. In this way, by connecting the transfer box 7 using the existing single telephone interface 21 in the existing main unit, the main unit 1 is not provided with a new interface circuit, and the space of the existing main unit 1 is saved. The communication interface of the transfer box 7 can be secured on the main device 1 side without enlargement. In addition, the main device 1 has a transfer box 7 as described later.
Can be identified through the two lines connected to the transfer box 7, and it can be easily identified whether or not the transfer box 7 is transferring an external call.

Next, FIG. 4 is a block diagram showing a detailed configuration of the main device 1 and the key telephone 5 constituting the key telephone device described above. In the figure, the main unit 1, the external line 3 ₁ to 3 _n, including an outside line 3 _1, 3 ₂ via the transfer box 7
External interface 11 _{1 -1} which is the interface of
1 _n , channel switch 12, telephone interface 13
_{1 to} 13 _m , CPU 14, ROM 15, RAM 16, holding IC 17 for sending a hold sound to an outside line when holding, PB sender 18 for sending a PB signal to transfer box 7, receiving a PB signal from each outside line or transfer box 7. P
It comprises a B receiver 19, a recording IC 20 for recording a business message or the like from an outside line, and the above-mentioned single telephone interface 21.

The single telephone interface 21 is connected to a two-wire loop by closing a contact RY5, which will be described later, of the connected transfer box 7 or a loop caused by off-hook of the single telephone when the single telephone is connected. A loop detection circuit 21A for detecting the closing and a power supply circuit 21B for supplying power to a connected single telephone or the like are provided. Further, the key telephone 5 is provided with a communication circuit 5.
1, a transmission circuit 54, a control unit 55, a display circuit 56, a keyboard 57 containing dial keys and the like.

In the system composed of the main unit 1 and the key telephone 5 configured as described above, the main unit 1 always receives operation data from each key telephone and transmits an outside line and an extension call according to the operation data. And the like, and performs exchange connection processing such as incoming call control for detecting an incoming call coming from each outside line and notifying the incoming call to each key telephone. Here, when the main apparatus 1 communicates with the transfer box 7 connected to this interface 21 via the single telephone interface 21, the following is performed. That is, in this case, the particular key telephone, for example, key telephone set 5 ₁ performs a predetermined dial key operation to off-hook, the transmitted main apparatus 1 C this operation data to the main device 1
It is received by PU14. In this case, CPU 14 by connecting a path between the telephone interface 13 ₁ and single line telephone interface 21 and controls the channel switch 12, to connect the path to the key telephone 5 ₁ and single line telephone interface 21.

[0014] When the dialing operation is performed by the key telephone 5 ₁ in this state, CPU 14 is PB sender 1
8 to transfer a PB dial signal corresponding to the operation data to the transfer box 7 via the single telephone interface 21.
Send to In this way, the transfer box 7 can be accessed from the main unit 1 side. In this case, the transfer box 7 side has the transfer incoming external line, the transfer originating external line, and the transfer destination necessary for the transfer control of the external call as described later. A telephone number and the like are set. Further, when the loop closed state of the transfer box 7 which has been constantly detected by the loop detection circuit 21A in the single telephone interface 21 changes to the loop open state, the main unit 1 performs call transfer on the transfer box side as described later. external 2 _1, 2 ₂ performs lighting instruction of the external lamps to each key telephone set 5 ₁ to 5 _m and determined to be used corresponds to the outside line 2 _1, 2 _2, lighting each line wire lamp for Let it. As a result, the user of each key telephone sets the outside line 2 ₁ , 2
₂ is identified as being used, it is possible to avoid the capture of outside line 2 _1, 2 ₂ by the operation of the key telephone user.

FIG. 1 is a block diagram showing a detailed structure of the transfer box 7. The transfer box 7
1, external 2 _1, 2 incoming detection circuit ₇₂ and 73 ₂ of the incoming detecting each loop detection circuit 74 and 75 for detecting the presence or absence of the loop forming the outside line 2 _1, 2 _2, respectively, outside line 2 ₂
, A PB sender 77,
PB receiver 78, audio LSI79, dialing output circuit 80 for outputting a dial signal to the outside line 2 _2, and stores the switching circuit 81, the voice switch 82, the cross point 83 is a communication channel, and transfer calling external, the destination telephone number, etc. It comprises an EEPROM 84 and the like. Note that RY1 to RY5
Is a contact, and T1 to T3 are transformers.

In the transfer box 7, the contact R
Y2, RY4 are閉結, thus external line 2 _1, 2 ₂
Are connected to the main device 1 via contacts RY2 and RY4, respectively. Further, the contact RY5 also always is閉結,閉結state of the two-wire loop according閉結of the contact RY5 is output as described above, the single line telephone interface 21 of the main device 1 via the terminal 6 ₂ Are detected by the loop detection circuit 21A and notified to the CPU 14,
Identified by PU14.

[0017] Now in the transfer box 7 configured as described above, in setting the automatic transfer mode, the incoming call arrives outside line 2 ₁ set as the transfer incoming external, which is detected via an incoming detection circuit 72 If, CPU 71 is transferred outgoing external first performed閉結contact RY3 external 2 ₂
Close the loop. And then, the EEPROM84
Set transfer destination telephone number is sent to the read dial output circuit 80 to, and outputs from the dial output circuit 80 a dial signal to the outside line 2 _2. As a result, the transfer destination is called. Thereafter, the response of the destination is detected via the polarity reversal detection circuit 76, CPU 71 is external 2 ₁ to閉結contacts RY1 to answer the call outside line 2 _1, and controls the cross point 83 and to connect the call path of the outside line 2 _2.
Thus a call between the caller and the external 2 ₂ destination from outside line 2 ₁ is performed via a voice switch 82. Also, C
PU71 at the time of connecting the call path between the external line 2 ₁ and external 2 _2, the notifying effect during transfer of external call to the main unit 1 by opening the contacts RY5, the contact RY2, RY
4 by opening the disconnecting each outside line 2 _1, 2 ₂ from the main unit 1.

Next, the operation of the transfer box 7 will be described in more detail with reference to the flowchart of FIG. For example, as shown in a flowchart of FIG. 9 described later, when a predetermined dial operation is performed on the key telephone, a PB dial signal corresponding to the operation dial data is transmitted from the PB sender 18 of the main device 1 to the transfer box 7. You. CPU 71
Is the PB of the PB signal sent from the PB sender 18.
The presence or absence of reception by the receiver 78 is determined in step S1. When the "Y" wherein in step S1, the next step S2, whether the data indicating the manual transfer operations dial data by the received PB signal connects the outside line 2 ₁ and 2 ₂ and for the transfer of the call not or the determining, which is executed in step S3 the transfer process to be described later for connecting to become the outside line 2 ₁ and 2 ₂ and "Y".

If the dial data is not data indicating a manual transfer operation, it is determined in step S4 whether the dial data is data indicating an automatic transfer mode setting for the box 7. If this is determined to be “Y”, EEPRO is determined in step S5.
The automatic transfer mode is set in M84. If the dial data is not data instructing the setting of the automatic transfer mode, it is determined in step S6 whether or not the data is data instructing the release of the automatic transfer mode. If the data becomes "Y", the data is set in the EEPROM 84. The automatic transfer mode is cleared and released in step S7, and the process proceeds to step S9. If the dial data does not correspond to any of the above, in step S8, for example, the data is set in the EEPROM 84 as the transfer destination telephone number, or the transfer outside line to which the transfer destination telephone number is output is stored in the EEPROM 8.
Then, other processes such as a process of setting to 4 are performed and step S9
Move to.

[0020] In step S9, Nyugaisen performs incoming detection determination (i.e., the outside line 2 ₁ is a transfer call outside line in this embodiment), when this is the "Y", with reference to EEPROM84 in step S10 automatic After confirming the setting of the transfer mode, in step S11 an outgoing / outgoing line (that is, EEPR
Shows the transfer originating outside line set to OM84, and outside line 2 ₂ in this embodiment) to capture. Subsequently, step S12
In reading the transfer destination telephone number is output to the dial output circuit 80 from the EEPROM 84, executes the dialing process for sending a dial signal from the dialing output circuit 80 to the outside line 2 _2.

[0021] Thereafter, the destination of the response and external 2 ₁ incoming stop is determined at the steps S13, S14, respectively, through the external line 2 ₂ of the destination of the response is polarization reversal detection circuit 76 during an incoming continue outside line 2 ₁ is detected Te and (transfer detecting means), performs a transfer process for connecting the outside line 2 _1, 2 ₂ at step S15, then returns to the step S1 and performs other processing in step S17. Also, the outside line 2 ₂ incoming stop outside line 2 ₁ is captured with the determination in step S14 is detected a "Y" while the destination does not respond to open at step S16, it executes the step S17 and subsequent steps.

The "manual transfer" in step S2 is actually performed in the following procedure. That is, the key telephone set 5 an incoming outside line 2 ₁ arrives is a transfer call outside line to incoming ringing, to hold the response outside line 2 ₁ First thereto at EKT 5. Then, the hold IC of the main device 1
17 holding tone to the outside line 2 ₁ is sent from the key telephone set 5
Outside line 2 ₁ of the lamp is flashing. Then, dial the destination telephone number by capturing the outside line 2 ₂ which is the transfer originating outside line key telephone 5 calls the transfer destination. The response of this to hold an outside line 2 ₂ When the confirmation button telephone 5.
Then, similarly holding tone is sent from the pending IC17 of the main apparatus 1 to the outside line 2 _2, outside line 2 ₂ of lamps EKT 5 flashes.

Thereafter, when a transfer operation is performed with the key telephone 5, the dial data described above is output to the transfer box 7 from the PB sender 18 of the main device 1. As a result, the transfer processing in step S3 described above is performed, in this transfer process, as will be described later, are external 2 ₁ and 2 ₂ paths connected and contacts RY5 is opened. In the main apparatus 1, upon detecting the opening of the contact RY5, by connecting to stop transmission to the external music on hold, and changing the outside line 2 ₁ and 2 ₂ of the lamp button telephone 5 are lit The key telephone 5 can confirm that the manual transfer has been performed.

Next, the detailed operation of the above-described transfer processing will be described with reference to FIG.
A description will be given based on the flowchart of FIG. That is, in step S21, the contacts RY1 and RY3 are closed and the outside line 2 ₁
(Incoming / outgoing line) and outside line 2 ₂ (outgoing / outgoing line), and then control cross point 83 in step S22 to control outside line 2 _1.
A connecting path between the external line 2 _2, to perform the call with a destination through the transfer box 7 of the caller. Then, during the transfer call, in a succeeding step S23, a two-wire loop (two-wire loop) for opening the normally closed contact RY5 is opened to notify the main apparatus 1 that the transfer is being performed.
As a result, each key telephone has the external line 2 as described above.
_The external line lamps corresponding to ₁ and 2 ₂ are turned on, and during this time, the user of each key telephone can recognize that the external lines 2 ₁ and 2 ₂ are disabled.

[0025] Thereafter, in step S24, the outside line 2 ₁ via the loop detection circuit 74 and 75, by detecting the loop opening of the outside line 2 _2, performs call end determination the calling and called party, either When the determination of the loop opening is detected step S24 in the external line is "Y", to open the capture state of the outside line 2 ₁ and external line 2 ₂ in step S25. Then after controlling the cross-point 83 is call termination to transfer call by opening the connection bus between the outside line 2 ₁ and external 2 ₂ in step S26, the閉結contacts RY5 in open at Step S27 2
Perform a wire loop capture (two wire loops closed),
The main device 1 is notified that the call is not transferred. As a result, it is possible outside line 2 _1, 2 ₂ external lamps of each key telephone corresponding to the turned off, to recognize the user of the key telephone sets that outside line 2 _1, 2 ₂ becomes available.

Next, the operation of the main unit 1 in response to the above-described transfer processing of the transfer box 7 will be described with reference to the flowchart of FIG. In the CPU 14 of the main device 1, a RAM
In step S31, it is determined whether or not the transfer box 7 is connected to the single interface 21 by referring to the function setting information set in advance in the predetermined area of No. 16 and the transfer box 7 is connected based on this function setting information. If it is determined that the loop detection circuit 21
It is determined via A that the two-wire loop is open or closed. Here, the contact RY5 of the transfer box 7 is opened, and step S3 is performed.
When 2 of the "opening of the two-wire loop" is "Y", each transmits the lighting data for each line wire lamp corresponding to outside line 2 _1, 2 ₂ are input external and Degaisen in step S33 to the key telephone sets The external line lamp is turned on, and subsequently, step S3
In step 4, a transfer in-use flag is set in the RAM 16, and the process ends. As a result, the user of each key telephone sets the outside line 2 ₁ ,
It can identify that 2 ₂ is used, thus it is possible to prevent the acquisition of outside line 2 _1, 2 ₂ of the user.

[0027] Thus, when the outside line 2 _1, 2 ₂ each external line lamp of each key telephone corresponding to each outside line is used by the transfer box 7 is in the lighting state, the ends the transfer of the call in the transfer box 7 The outside line is opened and the contact RY5
Is closed, the "opening of the two-wire loop" in step S32 is determined to be "N". In this case, CPU 14 determines whether the setting of the transfer busy flag in RAM16 in step S35, when the transfer-use flag is set, for each line wire lamp corresponding to outside line 2 _1, 2 ₂ at step S36 The turn-off data is transmitted to each key telephone to turn off each external line lamp, and then, in step S37, the transfer in-use flag is reset and the process ends. As a result, the outside line 2
_It is possible to identify that ₁ , 2 ₂ has become usable.

FIG. 2 is a block diagram showing a transfer box 7 according to a second embodiment. This second embodiment is different from the first embodiment shown in FIG. 1 in that instead of the contacts RY2 and RY4, a contact R is used.
Y6 and RY7 are provided.
_1, 2 ₂ drives and controls the contact RY6, RY7 is the in use, the main device to disconnect the external line 2 _1, 2 ₂ from the main unit 1 1
And the audio LSI 79 are connected.
With this construction, when using an outside line 2 _1, 2 ₂ Transfer box 7, these are not captured even if the capture operation outside line 2 ₁ or external 2 ₂ in each EKT side , from the voice LSI79 "right now, outside line 2 ₁ in the transfer box, 2 ₂ is in use" effect of the voice message is sent. Therefore, the user of the key telephone set can be easily identified that the outside line 2 _1, 2 ₂ are used.

FIG. 8 is a flow chart showing the operation of the transfer box according to the second embodiment, which is shown in FIG.
The same parts as those of the embodiment are denoted by the same reference numerals. That is,
External 2 _1, 2 ₂ to capture, in step S41 after further connecting each outside line 2 _1, 2 ₂ of the path, the contact RY6, R
Drives and controls the Y7, outside line 2 ₁ from the main unit 1, 2 ₂ Disconnect external line 2 of _the main apparatus 1, 2 ₂ of the connecting terminals 3 _1, 3
₂ is connected to the audio LSI 79, and the audio LSI 79 is driven to send the above-mentioned audio message to the main device 1.

[0030] Here, if you try to capture the outside line 2 ₁ or external 2 ₂ in the main device 1 by the operation of the key telephone side, without the outside line is captured, the above-described voice message output from the speech LSI79 Contact RY6 or RY7
Via the main unit 1 to the key telephone. As a result, the user of the key telephone that accesses the outside line can recognize that the outside line is in use. Thereafter, when the call end outside line 2 ₁ or external 2 ₂ is detected, opening of the outside line 2 _1, 2 ₂ of the opening and the external line 2 _1, 2 ₂ of the connection path is performed, in a subsequent step S42, the contact RY6 , to recover the RY7, the main unit 1 and the outside line 2 _1, 2 ₂
Are connected, and the driving of the audio LSI 79 is stopped.

Next, the CPU of the main unit 1 for performing the function setting for the transfer box 7 such as the setting of the transfer destination telephone number described above.
14 will be described in detail with reference to the flowchart of FIG. Particular button hook or the speaker key in the telephone 5 ₁ is operated this operation data main device 1
Is transmitted, the determination in step S51 is “Y”. Subsequently, "0" dial key is operated dial data in the key telephone set 5 _1, when "0" is transmitted thereto, the determination of step S52 "Y", and in this case CPU14, the connection of the transfer boxes 7 The presence or absence is determined in step S53. In this case, the CPU 14 inputs the detection output of the loop detection circuit 21A of the single telephone interface 21, and if the loop is closed, the transfer box 7
Is determined to be connected to the interface 21, and in step S54, the communication path switch 12 is controlled to control the single telephone interface 21 and the telephone interface 13 _1.
DOO form a speech path between the transfer box 7 EKT 5 ₁ and by connecting.

After that, the PB sender 18 is driven, and a dial "#" based on the PB signal is output to the transfer box 7 in step S55. Voice message "Transfer is box" as described below from the transfer box side by transmission of the PB signal is sent to the key telephone set 5 ₁ side. Then, it is determined pressing the dial keys operated by the key telephone set 5 ₁ side with respect to transmission of the voice message in step S56, step S if this is the "Y"
In step 57, the PB dial signal corresponding to the operation data
It is generated from the sender 18 and transmitted to the transfer box 7 via the communication path switch 12 and the single telephone interface 21. By the transmission of the dial signal, the above-mentioned transfer destination telephone number, transfer transmission outside line, and the like are set on the transfer box 7 side.
Thereafter, the re-operation of the hook or speaker button EKT 5 ₁ side that has been performed is determined to be "Y" at step S58 is detected, that the termination of the setting operation, the communication path in step S59 Switch 12
Controls to open the connection path between the key telephone 5 ₁ and single line telephone interface 21 terminates to.

Next, the operation of the CPU 71 of the transfer box 7 in response to the above operation of the main apparatus 1 will be described in detail with reference to the flowchart of FIG. First, in step S61, it is determined whether a PB signal has been received from the main device 1 via the PB receiver 78. If the PB signal has been received, it is next determined in step S62 whether or not a setting operation for the transfer destination telephone number or the like is being performed on this transfer box. Is determined in step S63. If the dial "#" is received, the setting operation is started for the transfer box 7, so that the setting operation flag is set in the internal memory in step S64, and then the voice LSI 79 is set in step S65. The driving and switching circuit 81 is controlled to output a voice message “Transfer box” from the voice LSI 79 to set the key telephone set 5 ₁ as a set telephone set.
And the process moves to step S71.

When the setting operation has already been started when the PB signal has been received and the setting operation flag is set, and therefore "setting operation" in step S62 becomes "Y",
The dial “*” and the dial “n” (n = 0, 1) operated after the dial “#” which has already received this received signal
-9) is determined in step S66. If the determination in step S66 is “Y”, the process proceeds to step S67. In the step S67, it is determined whether or not the dial "n" following the dial "*" is "9".
In step S68, various types of received data processing for processing dial data received from
At step 9, various audio output processes are executed.

That is, after receiving, for example, a two-digit dial "5" or "2" following the dial "*", and receiving a plurality of subsequent digits of dial data, the plurality of digits of dial data is transferred and transmitted as described above. the process of registering the EEPROM84 as a transfer destination telephone number to be output to the outside line 2 ₂ executed in step S68. When the two-digit dial “*” and “*” indicating the end of registration are received, the voice LSI 79
By driving a executes a process of sending the "destination telephone number ××× ··· × has been registered" effect of the voice message to the button telephone 5 ₁ at step S69.

[0036] In addition, if followed to dial "*" to receive, for example, dial "2", E an outside line 2 ₂ as a transfer outside line
The process of registering the EPROM84 executed in step S68, this case, step a process of sending by driving the voice LSI79 "Transfer outgoing external 2 ₂ has been registered as external" effect of the voice message to the key telephone set 5 ₁ S69
Do with. Incidentally, the dial "*" followed by example 2-digit dial "6" in the key telephone set 5 _1, and operates the "2", ××× as a phone number that is output from the transfer box 7 to the "transfer originating outside line 2 ₂・ ・ ・ × has been registered. "
Voice message is output, and dial “*”
With continued operation, for example, the dial "3", from the fact that "outside line 2 ₂ has been registered as a transfer originating outside line" effect of the voice message is output, it is possible to confirm the registered contents.

After the various registration settings are made in this manner, 2
When the digit dials "*" and "9" are operated and received, the determination in step S67 is "Y". In this case, the setting operation flag is cleared in step 70, and the various registration setting processing ends. . Thus, the EEPROM 8
When the transfer destination telephone number and the destination external is set to 4, in step S71, call detection transfer processing described above executed to transfer an incoming call external 2 ₁ outside line 2 ₂ on the basis of the contents set in the EEPROM84 Is done.

As described above, by connecting the main unit 1 and the transfer box 7 via the single telephone interface 21 which is an existing interface, the main unit can identify the transfer box being transferred. is there. As a result, it is possible to identify that the transfer box 7 is transferring on the main device 1 side without providing a dedicated interface on the main device 1. Further, when setting information such as a transfer outside line and a transfer destination telephone number in the transfer box 7, this function setting information is transmitted from the main unit to the transfer box 7 via the interface 21 and set. is there. As a result, the transfer box 7 does not require a setting switch or the like, so that the transfer box can be configured economically and the function setting for the transfer box can be reliably performed.

[0039]

As described above, according to the present invention, the transfer box and the existing second interface of the main unit are connected by two wires, and when it is detected that the transfer box is transferring, When the transfer box is connected to the second interface of the main unit, the normally closed two-wire DC loop is opened to identify to the main unit that the transfer is in progress, and to the key telephone, Is displayed, so that the transfer of the transfer box can be identified on the main device side and the user can be informed of the transfer without providing a new interface circuit in the main device of the key telephone device. . Also, when it is identified that the transfer of the transfer box is in progress, the respective indicators of the transfer incoming call line and the transfer outgoing call line of the key telephone are illuminated. The inside can be displayed visually. Further, when it is detected that the transfer box is transferring, the transfer incoming line and the transfer outgoing line connected to the main unit and the transfer box are always disconnected from the main unit, and these transfer line and the transfer outside line are disconnected. Since the audio signal generation circuit was connected to the terminal of the main unit to which the transmission outgoing line was connected,
When the main unit accesses the incoming and outgoing lines being transferred from the main unit using the key telephone, a predetermined voice message can be sent to the user, and the user can accurately recognize that the transfer is in progress. it can. When a predetermined setting operation of the key telephone is detected, a path between the second interface and the key telephone is connected, and function setting information such as a transfer outside line and a transfer destination telephone number based on the setting operation is transmitted to the transfer box. Since a switch for setting function setting information is not required in the transfer box, the transfer box can be configured economically and the transfer control can be reliably performed on the transfer box. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a transfer box constituting a key telephone apparatus of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the transfer box.

FIG. 3 is a block diagram showing a schematic configuration of the key telephone device.

FIG. 4 is a block diagram of a main device and a key telephone which constitute the key telephone device.

FIG. 5 is a flowchart showing the operation of the transfer box.

FIG. 6 is a flowchart showing an operation of the first embodiment, which is an operation of a main part of the transfer box.

FIG. 7 is a flowchart showing the operation of the main device.

FIG. 8 is a flowchart showing the operation of the second embodiment, which is the main operation of the transfer box.

FIG. 9 is a flowchart illustrating an operation of setting various information in a transfer box of the main device.

FIG. 10 is a flowchart showing an operation of setting various information in a transfer box.

FIG. 11 is a block diagram of a conventional device to which a transfer box is added.

[Explanation of symbols]

1 ... main unit, 2 ₁ to 2 _n ... external line, 5 ₁ to 5 _m ... EKT, 7 ... transfer box, 14,71 ... CPU, 12 ...
Call path switch 13, telephone interface 18,
77 ... PB sender, 19,78 ... PB receiver, 21 ...
Single telephone interface, 21A, 74, 75: loop detection circuit, 72, 73: incoming call detection circuit, 76: reversal detection circuit, 79: voice LSI, 80: dial output circuit,
83 cross point, 84 EEPROM, RY1
RY7 ... Contact.

Claims (4)

(57) [Claims] 1. A first interface for accommodating a plurality of external lines and connecting a key telephone, and a detection unit for connecting a single telephone by two lines and detecting opening or closing of a DC loop of the two lines. A key telephone comprising: a main device having a second interface; and a transfer box for transferring an incoming call arriving at a transfer destination external line among the plurality of external lines to a preset transfer destination via a transfer source external line. In the apparatus, the transfer box and the second interface are connected by the two wires, and the transfer box has a transfer detecting means for detecting that a transfer is being performed, and opening or closing of a DC loop for the two wires. The relay that controls connection and the relay are controlled so that the DC loop is normally closed, and the DC loop is opened by the detection output during transfer by the transfer detection means. Relay means for controlling, and the main device has an identification means for identifying that the transfer is being performed by detecting the opening of the DC loop by the transfer detection means, and the identification means determines that the transfer of the transfer box is being performed. Display means for displaying, to the key telephone, that the transfer is in progress if identified. 2. The key telephone device according to claim 1, wherein a contact for connecting a transfer incoming line and a transfer outgoing line to the main unit and the transfer box at all times, and a predetermined voice message are output to the transfer box. An audio signal generating circuit that performs the transfer and the transfer detection means controls the contact according to a detection output during transfer to disconnect the transfer incoming external line and the transfer outgoing external line from the main device. Control means for connecting the audio signal generation circuit to a terminal of the connected main device. 3. The key telephone device according to claim 1, wherein said display means turns on each lamp of a transfer incoming line and a transfer outgoing line of said key telephone when it is identified that said transfer box is being transferred. A key telephone device for displaying. 4. The key telephone apparatus according to claim 1, wherein the main unit stores function setting information such as the transfer incoming line, the transfer outgoing line, and a transfer destination telephone number transmitted to the transfer outgoing line. Transmitting means for transmitting to the transfer box via the second interface, detecting means for detecting a predetermined setting operation of the key telephone, first and second interfaces in accordance with the detection output of the detecting means; Control means for connecting said path and controlling said transmitting means to transmit said function setting information in accordance with the operation of the key telephone, and registering said function setting information in said transfer box. Telephone equipment.