JP3235362B2 - 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 comprising a main unit and a plurality of key telephones, and capable of making an extension call between the key telephones.

[0002]

2. Description of the Related Art In a key telephone apparatus of this type capable of making an extension call, when a key telephone is off-hook and an extension key is operated, such operation information is transmitted to a main apparatus side and stored in the main apparatus side. Subsequently, when the dial key is operated in the corresponding key telephone, the main unit calls an extension to the key telephone having the extension number corresponding to the operated dial key. When a response operation of the called key telephone is detected, the main unit connects the respective key telephones to the extension communication path to perform an extension call.

[0003]

In the case where an extension call is made to the remote key telephone at the time of such an extension call, conventionally, if the call path is not available, the call cannot be made until the call path becomes free. Therefore, it has a drawback that it is not suitable for emergency calls. It is also considered to provide a key for the emergency call on the key telephone and operate this key in an emergency to call a specific key telephone, but if the called party is absent, the other party can be called at any time. Therefore, when an emergency situation occurs, it is not possible to contact the other party immediately. Accordingly, an object of the present invention is to provide an emergency call by performing a call even when a call path is not available when an extension calling operation is performed, and to promptly and surely contact the other party in an emergency. I do.

[0004]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention comprises a plurality of key telephones and a main unit for accommodating each key telephone and an outside line, and dialing an extension number by the key telephones. Is detected,
In a key telephone apparatus for making a call to a key telephone set according to a given extension number, the key telephone sets a compulsory call key.
The main unit uses a key telephone to dial the extension number.
Determining means for determining whether or not an unoccupied call path when Le operation is performed, and no free call path at the discretion constant means
Button that dialed the extension number when determined
When the operation of the forcible call key on the telephone is detected, the call path is
Call system to call any key telephone in use
And means of control .

[0005] In this case, the determination means determines whether the communication path is available.
Timer for a predetermined time that is started when it is determined that there is no
Is provided in the main unit, and the call control means is forced during the operation of the timer.
The operation of the call key is detected . In addition, the present invention
Detects a predetermined call operation of the key telephone to the main unit.
First detecting means, and a button for external call or internal call.
Determining means for determining whether a touch-tone telephone is present;
It is determined that a predetermined calling operation is detected by the first detecting means
To any key telephone determined to be busy
And call control means for making a call . This
For the main device, a second detecting means for detecting the end Hanashimisao operation invocation is button telephone by call control means,
A call continuation unit for continuing the call by the call control unit to the key telephone whose end operation has been detected by the second detection unit, and a response of the key telephone continued to be called by the call continuation unit. Call by operation and call control means
And means for transition to internal calls according to any hand of EKT pending operations are those digits set.

[0006]

[Function] Dial operation of extension number by key telephone
When the call is made, it is determined whether there is a free call path.
When it is determined that there is no available call path,
The key of the compulsory ring key of the key telephone that dialed the number
When an operation is detected, a call is made to any key telephone that is using the call path . A result of this, it is possible to make at a surely call path by this call even when the call path is not empty.

Here, if there is no available communication path, a timer for a predetermined time is started, and an operation of a compulsory call key is accepted during the operation of the timer. As a result, the time to select whether to make a forced call to the key telephone during a call is reduced.
Can be given to the calling party . Also, for example, emergency
Predetermined calls, such as pressing the emergency key to call an extension
When operation is detected, calls such as external calls or internal calls
Make a call to any of the key telephones. This result
As a result, users may be
The active phone that is talking
Therefore, in the event of an emergency, promptly and reliably
Can communicate. Also, the end of the called button telephone
Continuing the call upon detecting the operation, the program shifts the response operation of the <br/> EKT for this call to the detection result extension call, the process proceeds to internal calls when detecting the hold operation of the call button that was phone. As a result, an extension call can be immediately made via the vacant call path.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of a key telephone apparatus according to the present invention. In the figure, 1 is a main unit, a main unit with a plurality of outside lines 3 ₁ to 3 _n is connected to one, a plurality of key telephone sets 5 ₁ to 5 _m each line 4 _1-4
Connected via _m .

Here, main device 1 is configured as follows. That, 11 ₁ to 11 _n are external line interface is an interface between the external line 3 ₁ to 3 _n, the channel switch 12, 13 ₁ ~13 _m is an interface between the key telephone 5 ₁ to 5 _m telephone interface , 14 are CPUs for controlling the main unit 1, 15 is a ROM for storing programs to be executed by the CPU 14, and 16 is a RAM for storing dial numbers for automatic dialing. Also,
17 PB receiver hold IC, 18 for transmitting the music on hold during external hold to the outside line for receiving the PB signal from the external line via the external line interface 11 ₁ to 11 _n and channel switch 12, 19 and 20 the apparatus Recording and playback I for outputting a message to the other party and recording a message from the other party when the is used as an answering machine
C and a cassette mechanism.

The key telephone 5 has a communication circuit 51,
It comprises a transmission circuit 54 for performing data transmission with the main device 1, a control unit 55 for controlling the key telephone 5, a display circuit 56, a keyboard 57, a speaker SP, a microphone MIC, and the like, and has a hands-free function. Here, the keyboard 57 includes an external line key A, a dial key B, a hold key C, an extension key D, and an emergency key E, each of which includes a plurality of external line buttons.
And so on.

When the off-hook operation is performed on the key telephone 5, the control unit 55 detects the off-hook from the state of the hook switch HS and transmits the off-hook information to the main unit 1 via the transmission circuit 54. Subsequently, when the operation of the external key A of the keyboard 57 is detected, the operation information is transmitted to the main device 1. In this case, when the CPU 14 of the main device 1 receives the external line key operation information via the telephone interface 13, it controls the corresponding external line interface and captures the external line.

Thereafter, when the dial key B of the keyboard 57 of the key telephone 5 is operated and this operation information is transmitted to the main unit 1, the CPU 14 controls the corresponding external line interface and captures this operation information as a dial signal. Send to outside line. The dial operation information sequentially operated in this way is transmitted as a dial signal to the outside line to be picked up, so that the other party's telephone is called, and the other party's telephone responds to the outside line communication state.

After the off-hook, the corresponding key telephone 5
Is operated, and subsequently the dial key B is operated, the CPU 14 of the main device 1 makes an extension call to the key telephone having the extension number corresponding to the operated dial key. Then, the call is made to the extension call state by the response of the other party's key telephone. By the way, in the case of such an extension call,
Conventionally, there is a drawback that a call cannot be made unless the call path is free, and thus it is not suitable for an emergency call. Therefore, in the present invention, a call can be made even when the call path is not free, so that an emergency can be dealt with.

FIGS. 2 and 3 are flowcharts showing the operation of the first embodiment of the CPU 14 of the main unit 1 having such an extension calling function. The operation of the main part of the present invention will be described with reference to these flowcharts. In the first embodiment, each communication path in the communication path switch 12 is not separated for the outside line and the inside line. First, FIG.
In step S1, it is determined that the extension key E of the key phone (hereinafter referred to as a slave) has been pressed after the off-hook operation. When the depression of the extension key E of the slave is detected, the dial key B of the slave is successively pressed. Press extension number n based on operation in step S
Judge with 2.

Here, when the depression of the extension number n is detected and "Y" is determined in step S2, it is determined in step S3 whether or not the communication path is empty. Here, if the call path is empty, an "extension n call" for calling the other handset corresponding to the extension number n is performed in step S4. In response to the calling of the calling handset (calling handset), a response based on the off-hook operation of the called handset (called handset) is detected, and the determination in step S5 of FIG. 3 is “Y”. Then, in step S7, the communication path switch 12 is controlled to perform an extension communication process for connecting the calling side and the called side slave units to the vacant communication path, thereby starting an extension call.

Thereafter, on-hook of either the calling side or the called side of the handset is detected, and the determination in step S8 is "Y".
Then, in step S9, the communication path switch 12 is controlled to execute a call termination process for releasing the calling and called slave units from the calling path, and then returns to step S1 in FIG. 3 to be in a standby state. Further, since the calling slave unit goes on-hook and abandons the call before the called slave unit answers, "cancel calling of the calling slave unit" in step S6 becomes "Y".
If it is determined in step S10, an extension call termination process for canceling the outgoing and incoming states of each of the slave units is executed in step S10.

On the other hand, if the call path is not empty when making an extension call, so if the determination in step S3 of FIG. 2 is "N", a busy tone indicating busy is transmitted to the calling handset in step S11. In step S12, a forced call reception timer is started. Then, in steps S13 and S14, the respective determinations of "pressing the hold key of the calling slave unit" and "time-up of the timer" are performed.
Here, during the operation of this timer, the hold key C on the calling handset side
If the operation (forced call operation) is not detected ("Y" in step S14), the process returns to step S1 to determine again that the "extension key is pressed", but the operation of the hold key is performed during the operation of the timer. Is detected and the determination in step S13 becomes "Y", the busy tone of the calling handset is stopped in step S15, and an extension call is made in step S16 to any handset that is using the call path. In addition,
This extension call is called a busy call, and a call is made to a slave unit during a call, for example, by using a tone.

Subsequently, step S17 and step S1
In step 8, it is determined that the call termination of the called slave unit and the outside call of the called slave unit are in progress. Here, for example, when the called slave unit that is engaged in a call using the call path notices the above-described busy call and ends the call, the determination in step S17 becomes “Y”. In this case, for example, if the called slave unit is in the process of making an extension call, the CPU 14 releases the called slave unit and the other slave unit from the call path, and performs a call termination process to make the call path idle. At the same time, the free calling path is secured, the called slave unit during busy calling is set to the extension calling state, and the calling is continued, and the process proceeds to step S5 in FIG. And step S
In steps 5 and S6, the respective judgments of "response response" indicating the response of the called slave and "call cancellation" indicating the abandonment of the calling slave are made. If the other party's response is detected here,
In step S7, an extension call process is performed.

At the time of this extension call, if the other party is not the slave unit having the desired extension number n, the following step S9
After the call termination processing is performed, the call is again transmitted to the desired slave unit, so that it is possible to talk with the desired party via the vacant call path. If the other party is the desired party, the call can be made without calling again. on the other hand,
If the called handset is busy on an outside line, and the called handset recognizes the above-mentioned busy call and the hold key C is operated and the determination in step S19 becomes "Y", step S20 is reached.
To hold the outside line. Then, at this time, since the call path is vacant due to the hold of the outside line, the process similarly shifts to step S5 in FIG. If a call path becomes empty while a call is being made to another handset during a call, it is possible to automatically switch the call to the handset with the extension number n which is to be called first.

As described above, if a call path is not free when making an extension call, a call can be made to a child device during a call based on a predetermined key operation. As a result,
If the call path is blocked when urgently calling the slave unit, if the called slave unit is the desired slave unit, the call path is opened by terminating the call currently used by the slave unit. Therefore, it is possible to quickly make a call with a desired slave unit by using the opened free call path. Also,
If the called handset is another handset, it is possible to request that the call path be vacated by making an extension call with the other handset, and thus promptly using the vacant call path. It becomes possible to talk with a desired partner.

Next, FIGS. 4 and 5 are flow charts showing the operation of the second embodiment. In this embodiment, the extension number is registered in the RAM 16 of the main unit 1 in correspondence with the emergency key E provided in the child device 5, and the operation of this emergency key E (predetermined calling operation) automatically causes the relevant child device to be registered. This is an example of calling an extension to a machine. That is, first, in step S31 of FIG. 4, it is determined whether or not the emergency key E of the slave unit is pressed, and when the pressing of the emergency key E of the slave unit is detected, whether or not the slave unit is in the unused state of the on-hook state is determined. Is determined in step S32.

Here, if the handset that has operated the emergency key is in an unused state, it is determined in step S33 whether or not there is another handset during a call. In step S34, a call is made to the slave unit corresponding to the extension number registered in the corresponding slave unit area in the RAM 16 corresponding to the emergency key. Then, a ring back tone is transmitted to the calling handset in step S35.

An off-hook operation indicating a response of the called slave unit to such calling of the calling slave unit is detected, and step S3 is performed.
If the determination in step 6 becomes "Y", in step S37, the ringback tone of the calling handset is stopped, and the calling path switch 12 is controlled to set each calling handset and called handset to the extension call path. Connect and start an extension call. In this case, control data for turning on the speaker SP and the microphone MIC is transmitted to the calling terminal in step S38. As a result, the control unit 55 of the calling handset via the call circuit 51
When the speaker SP and the microphone MIC are turned on, the calling handset enters an extension hands-free talking state.

Thereafter, in step S39 and step S40 of FIG. 5, the termination of the called terminal and the termination of the calling terminal are determined. Here, when the on-hook operation of the called handset is detected and the determination in step S39 becomes "Y", the communication path switch 12 is controlled to open the communication path for performing the extension call in step S41, and in step S42. The control data for turning off the speaker SP and the microphone MIC is transmitted to the calling handset to release the hands-free state, and the process returns to step S31 in FIG. 4 to enter the standby state. If the call termination operation of the calling handset is detected and the determination in step S40 becomes "Y", the communication path switch 12 is controlled to open the communication path in step S43, and in step S44 the handset of the calling handset is disconnected. Release the free state. Thereafter, in step S45, the busy tone data is transmitted to the called handset to transmit a busy tone from the called handset, and when the call termination due to the on-hook of the called handset is detected and “Y” is determined in step S46, step S47 is performed. Transmits the busy tone off data to the called slave unit to stop the busy tone sounding of the called slave unit.

As described above, in the case of an extension call based on the operation of the emergency key, the calling unit is set to the hands-free state, so that the calling unit can talk with the other party without any operation. it can. In addition, since the call can be automatically terminated by the calling subunit when the call of the called subunit ends, the operation at the end of the call becomes unnecessary. On the other hand, the handset that has operated the emergency key E is in an unused state, and at that time, there is a handset that is engaged in an external call or an internal call in the system, and the determination in step S33 in FIG. If "Y", step S5
In step 1, a call is made to any of the handsets during the call (call in progress). Subsequently, in step S52, a ring back tone is transmitted to the calling handset to ring. Next, in step S53 and step S54, it is determined that the call termination of the called slave unit and the outside call of the called slave unit are in progress, respectively.

Here, when the call of the called slave unit is terminated and the determination in step S53 is "Y", the called slave unit during the extension busy call is set to the extension calling state, and the call is continued, and the call is continued in step S36. Then, it is determined whether or not there is an off-hook operation of the receiver. Then, if an off-hook is detected at this time, the process proceeds to the extension call process from step S37. In addition, the called slave unit is busy on an outside line, and the
Is determined to be "Y", the operation of the hold key C of the called slave unit is detected and determined in step S55. If the hold key is operated on the called handset, the outside line is held in step S56, and the process goes to step S37 to hold the outside line and connect the internal call path between the called handset and the calling handset which are in the idle state. Then, an extension intercommunication is performed between the slave units.

As described above, at the time of calling an extension based on the operation of the emergency key E, the calling is performed to the slave unit during a call regardless of the registered extension number. As a result, in the event of an emergency, a vacant slave unit that may be absent calls the actual party in a call, so that when an emergency situation occurs, the other party can be reliably called and contacted.

[0028]

As described above, according to the present invention, the button
Dialing the extension number with the tongue telephone
To determine if there is a free call path,
When it is determined that there is no free
Detects the operation of the compulsory ring key of the dialed key telephone
Then, for any key phone that is using the call path,
Since the call is made, the call path can be surely opened by this call even when the call path is not free. Here, or with the absence of free calls path starts a timer for a predetermined time, since the accept operation of the forced call key during operation of the timer, the forced call to the key telephone set in a call The time to select whether or not to do so can be given to the calling party . In addition, the present invention
Presses the emergency key, for example, to call an extension urgently
Etc., when a predetermined call operation is detected,
Call any key telephone during a call such as a line call
Because there is a possibility that there will be no user
Telephone during a call where the user is actually talking on the phone from the telephone
Will be called with priority, so promptly in case of emergency, etc.
It is possible to transmit business requirements etc. reliably. Also, the called button
When the end operation of the touch- tone telephone is detected, the call is continued, and when the response operation of the key telephone to the call is detected, the operation shifts to the extension call, while the called telephone is called. When an on-hold operation is detected, a transition is made to an extension call, so that an extension call can be started immediately via a vacant call path.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a key telephone apparatus of the present invention.

FIG. 2 is a flowchart showing the operation of the first embodiment of the apparatus.

FIG. 3 is a flowchart showing an operation of the first embodiment of the apparatus.

FIG. 4 is a flowchart showing the operation of the second embodiment of the device.

FIG. 5 is a flowchart showing the operation of the second embodiment of the device.

[Explanation of symbols]

1 ... main unit, 3 ₁ to 3 _n ... external line, 5 ₁ to 5 _m ... key telephone (handset), 11 ₁ to 11 _n ... external interface,
12 ... channel switch, 13 ₁ to 13 _m ... telephone interface, 14 ... CPU, 16 ... RAM, 51 ... speech circuit, 54 ... transmission circuit, 55 ... control unit, 57 ... keyboard, A ... outside line key, B ... dial Key, C ... hold key,
D: extension key, E: emergency key.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04Q 3/58 107

Claims (4)

(57) [Claims] And 1. A plurality of key telephone sets, consists of a main unit that houses the respective key telephone and outside line, when detecting the dialing extension by the key telephone set, the detection of
In the key telephone apparatus for making a call to the key telephone according to the extension number given, the key telephone has a forced call key, and the main unit has been operated to dial the extension number by the key telephone.
Determining means for determining whether or not an unoccupied call path when, it is determined that there is no free call path by the determining means
When the keypad phone dialed the extension number
Call control means for calling an arbitrary key telephone using a call path upon detecting operation of the forcible call key
Key telephone system characterized in that it comprises and. 2. The communication device according to claim 1, wherein said determination means determines that said communication path is free.
A timer for a predetermined time that is started when the
The call control means may make the forcible during the operation of the timer.
A key telephone device for detecting operation of a call key . 3. A plurality of key telephones and each key telephone.
And a main unit that accommodates an outside line,
When an extension dialing operation is detected by the
In the button telephone device for calling the key telephone according to the extension number received , the main unit detects a predetermined call operation of the key telephone.
There is an exit means and a key phone that is on an external or internal call
Determining means for determining whether or not the predetermined calling operation is detected by the first detecting means;
Any of the buttons determined to be busy by the determination means
Key telephone system which is characterized in that a call control means for performing a call to Tan phone. 4. The method of claim 3, wherein the main unit, a call end operation and a second detecting means for detecting the end Hanashimisao operation invocation is button telephone by said call control means, by said second detecting means Is continued by the call control means for the key telephone in which
A call continuity means that, in response operation and the call control means for said call buttons telephone call is continued by the call continuation means
Ri in response to the place a call on hold coercive <br/> clasp any hand operation invocation is button telephone the plant and the key telephone
The extension call path between the key telephones that performed the
Key telephone system, wherein a connected only set and means causing transition to internal calls.