JP2000278449A - Key telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately display a charge rate for a call and to accurately perform speech control, even when a function that is unique to a key telephone system, such as pending transfer and conference speech communication is carried out. SOLUTION: A receiving means 1 receives charge data notified from an ISDN network after transmitting call setting data in transmitting it, a detecting means 2 detects a charge needed for speech or communication from the charge data, and a calculating means 3 starts to calculate the charge for speech on the basis of this charge information. Then, when pending transfer and conference speech communication are performed, charges for speech communication are continuously/newly calculated, on the basis of the original charge information in accordance with the existence/absence of the transition of respective speech communication states, and calculation objects and their display and communication control are performed.

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, and more particularly to a key telephone apparatus for displaying, on a slave unit, a call charge and an information charge notified from an ISDN network.

[0002]

2. Description of the Related Art In recent years, a key telephone apparatus has a display function of displaying various information on a display. The information displayed on the display unit is, for example, information such as a call time, a call charge, and the like, in addition to a destination telephone number. Conventionally, when displaying a call charge using such a function, an approximate call charge corresponding to a destination telephone number is derived by referring to a pre-registered charge table, and this is displayed on a display device. ing.

[0003]

However, such a conventional key telephone apparatus derives an approximate telephone charge corresponding to a destination telephone number by referring to a preset charge table. Therefore, it is not possible to cope with the charges required for individual calls and various kinds of paid services that have been increasing in recent years, particularly when functions unique to the key telephone device, such as functions such as hold transfer and conference call, are executed,
There has been a problem that it is not possible to accurately display a call charge or regulate a call. The present invention is intended to solve such a problem. Even when a relatively complicated function such as a hold transfer or a conference call is performed on a key telephone device, a call charge display and a call regulation can be accurately performed. It is an object of the present invention to provide a key telephone device that can be used.

[0004]

In order to achieve the above object, a key telephone apparatus according to the present invention comprises: receiving means for receiving call data notified from an ISDN network after transmitting call setting data at the time of calling; Detecting means for detecting a charge required for a call from the charge data received by the receiving means, and counting a call charge of the telephone set to be counted during an external call based on the charge information obtained from the charge data by the detection means. And counting means for sequentially displaying the call charges counted by the counting means, suspending the display in response to holding the outside line by the counting target telephone, and resuming the display in response to the subsequent release of holding by the counting target telephone. It is something to do. In addition, the counting means starts counting the new call charge based on the charge information in response to the release of the hold by a telephone different from the counting target telephone, and the control means determines that the call charge has newly started counting. Are sequentially displayed.

Further, after transmitting the call setting data at the time of calling,
Receiving means for receiving the charge data notified from the SDN network, detecting means for detecting a charge required for a call from the charge data received by the receiving means, and based on the charge information obtained from the charge data by the detecting means. Counting means for counting the telephone charge of the telephone set to be counted during an external call, and the call charge counted by the counting means and the restriction set in advance as a call restriction condition per call for the telephone set to be counted. Whether the continuation of the external call is determined by comparing the charge with a fee, and the continuation of the external call is regulated in accordance with the determination of the continuation inability.

When the outside-line call is transferred to a telephone different from the telephone to be counted, the counting means starts counting the new call charges based on the charge information, and the counting means newly starts counting. In this case, the continuation of the external telephone call is determined by comparing the telephone call charge with a regulated telephone charge set in advance as a call restriction condition per telephone call to the destination telephone of the external telephone call.

In addition, when another interrupting telephone is connected to the external line in addition to the telephone to be counted during an external call, the telephone enters an external line conference state. The counting of the call charges based on the charge information is continued, and the call charges continuously counted by the counting means are compared with the restriction charges set in advance as the call restriction conditions per call for the interrupted telephone. By doing so, it is determined whether or not the outside line communication can be continued.

[0008]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a key telephone apparatus according to an embodiment of the present invention. In FIG. 1, the key telephone device includes a main device 10 accommodating a plurality of ISDN lines, and a plurality of key telephones 20 accommodated in the main device 10.

In the main unit 10, reference numeral 11 denotes an external line interface (external line I / F) for connecting an ISDN line;
Is an extension interface (extension I / F) for connecting the key telephone set 20, and 12 is an ISDN line connected via the outside line interface 11 and the extension interface 1.
A switch for exchanging connection with the key telephone 20 connected via 3; a control unit (CPU) 14 for controlling the entire key telephone apparatus by executing a predetermined program;
Reference numeral 15 denotes a storage unit that stores programs and various control management information, and 16 denotes a power supply unit that supplies power to the key telephone 20.

In the key telephone 20, reference numeral 21 designates an extension interface (extension I / F) for transmitting and receiving voice data and control data to and from the main unit 10, and 22 designates a key telephone by executing a built-in predetermined program. A control unit (CPU) 23 for controlling the extension interface 21
An audio processing unit which converts the audio data received by the telephone set into an audio signal and outputs the audio signal to a handset (HS) or a speaker (SP), and converts the audio signal input from the handset into audio data and outputs it to an extension interface;
Is a display unit for displaying various information such as a call charge and a call time, and 25 is an operation unit for inputting various key operations.

The present invention utilizes a charge advance notification service provided by an ISDN network, counts call charges based on charge data notified by the service, displays the charge on a key telephone, or regulates call continuation. Is what you do. For this reason, a functional block relating to the counting of call charges as shown in FIG. 2 is configured using various programs executed by the control unit 14 of the main device 10 and the control unit 22 of the key telephone 20 and the above-described hardware. ing.

FIG. 2 is an explanatory diagram showing functional blocks of the present invention. In FIG. 1, reference numeral 1 denotes a receiving means (external line interface 11 and control unit 14) for receiving charge data notified from the ISDN network by a charge advance notification service after transmitting setting data to the ISDN network at the time of transmission. Detecting means (control section 14) for detecting a charge required for a telephone call or communication, that is, charge information including a call charge and an information charge, from the charge data received by the receiving means 1, and the charge information detected by the detection means 2 The counting unit (control unit 14) calculates a call fee based on the call time of the call.

Reference numeral 5 denotes storage means (storage unit 15) for recording a regulated call rate serving as a condition for determining whether communication can be continued for each of the whole system, each outside line, or each key telephone, and 6 denotes a call rate counted by the counting means 3. A determination unit (control unit 14) for determining whether communication can be continued by comparing the regulated telephone charge stored in the storage unit 5 with the counting unit 3
Control means (control unit 14) for displaying the call charges counted in step (1) on the key telephone and for restricting the call based on the determination result of the determination means 6.

Next, with reference to FIG. 3, a fee advance notification service in the ISDN network will be described. Figure 3 shows the IS
It is explanatory drawing which shows the charge advance notification service in a DN network, (a) is a system block diagram, (b) is a sequence diagram which shows operation | movement.

In FIG. 3A, a calling telephone device 31 is a telephone device to which the present invention is applied, and is accommodated in an ISDN network 33. Note that the receiving-side telephone device 32 directly
It is not necessary to be accommodated in the SDN network 33, and it may be connected to the ISDN network 33 via another network.

First, a user performs a calling operation on the calling telephone device 31. In response, a call setting 34 including the dial number of the called telephone device 32 is sent from the calling telephone device 31 to the IS.
It is sent to the DN network 33. In this case, an activation number for activating the advance fee notification service is set in the call setting 34.

In accordance with the call setting 34, the ISDN network 33 transmits the charge data relating to the call (communication) with the called telephone device 32, in this case, the call charge, the information charge, and the information charge non-charge time by the charge notification 35, The calling side telephone device 31 is notified.
Almost in parallel with this, the ISDN 33 sends a call 36 to the destination telephone device 32 to start the call.

Thereafter, when a response operation is performed on the called telephone device 32, a response 37 is sent from the called telephone device 32 to the ISDN network 33, and a response is sent from the ISDN network 33 to the calling telephone device 31. 38 is sent out. This allows
The calling telephone device 31 and the called telephone device 32 are connected via the ISDN network 33, and a call (communication) is started.

Thus, in the calling telephone device 31,
By using the advance fee notification service, the called telephone device 32 can respond before the called telephone device 32 answers the call.
The charge data relating to the call (communication) with the user, that is, the call charge, the information charge, and the information charge non-charging time can be acquired from the ISDN 33.

FIG. 4 is an example of a format showing fee data notified from the ISDN network. Note that this charge data is actually stored and notified in a predetermined message such as an additional information message transmitted from the ISDN 33 to the calling telephone device 31.

The charge notification information element identifier 41 stores an identifier indicating that the following data is the charge notification information, and the charge notification content length 42 stores the length of the charge notification information. The information type 43 stores the type of each charge information stored in the information field 44 described later.
The information field 44 stores actual charge data, here, a call charge 45, an information charge 46, and an information charge non-charging time 47.

In particular, the information charge 46 is a charge that is charged in addition to the normal call charge 45 for the paid service provided by the called telephone device 32. Will be notified as needed. Generally, as for the charging of the information fee 46, the charging is started after a lapse of a predetermined time from the start of the telephone call (communication) with the destination telephone device 32, as the paid service selection time by the calling user. The time is notified as the information fee non-charging time 47.

The call charge 45 is a pay-per-use system.
In addition to being notified of the time during which a call can be made with a predetermined amount (talk time per unit amount), such as being able to talk for 45 seconds at 0 yen, the amount charged per predetermined time (the amount per unit time) ). On the other hand, the information fee 46 is notified in the same manner as the call fee 45 in the case of the flat rate system, but one call (communication) in the case of the flat rate system.
Only the amount charged for each is notified.

Next, the operation of the present invention will be described with reference to FIGS. FIGS. 5 and 6 are flowcharts each showing an outside line transmission process as an operation of the key telephone apparatus of the present invention. In particular, FIG. 5 shows an outside line calling operation and a normal outside line call and hold operation, and FIG. 6 shows an outside line conference call in which a plurality of key telephones are connected to the outside line.

In the following, a regulated call rate per call with respect to the call charge and the information charge is set in advance as the call control condition of the entire system, and the storage means 5 (the storage section 1).
It shall be registered in 5). Call regulation means that the upper limit of the charge required for one call, such as call charge and information charge, is set in advance as a regulated call charge, and when the accumulated charge during the call exceeds this regulated call charge, The continuation of the call is regulated by disconnection or the like.

In the present invention, a case where the above-mentioned call charge is used as the regulation judgment will be described. In addition to this, a method of restricting by a call time that can be used for one call and a method of controlling both the call charge and the call time are described. Alternatively, a method of regulating when any one of the regulations is applied may be applied.

The type of the restriction condition will be described by taking as an example a case where the restriction system is provided in common for the entire system of the key telephone apparatus, that is, for all the key telephones. The specified restriction condition may be used. Further, a plurality of these regulation conditions may be provided in an overlapping manner, and regulation may be performed when any one of the regulation conditions is targeted.

First, referring to FIG. 5, a description will be given of an outside line transmission operation, a normal outside line communication, and an outside line holding operation. At the time of outside line transmission, the user operates the operation unit 25 of the key telephone 20 to input the dial number of the destination (the other party). In response, the control unit 2 of the key telephone 20
From 2, control data is transferred to the control unit 14 of the main device 10 via the extension interface 21 and the extension interface 13.

The control unit 14 of the main unit 10 selects one of the external line interfaces 11 based on the control data, and transmits a call request from the external line connected to the external line interface 11, that is, the ISDN line to the ISDN network as a call request. The call setting data including the dial number and the request for the charge advance notification service is transmitted (step 101). Then I
The charge data notified from the SDN network is received by the receiving means 1 (the outside line interface 11 and the control unit 14), and as shown in FIG. 4, the call charge 45, the information charge 46 and the information charge non-charging time 47 are detected. 2 (step 102).

Next, the key telephone 20 which made an outgoing call
Is a key telephone (hereinafter referred to as a call target) for which call charges and call times are counted, that is, call regulation judgments and call time displays are made.
(Referred to as a telephone to be counted) (step 103),
In response to the response of the destination (external line side) thereafter, counting of the call time is started by the counting means 3 and counting of the call charge is newly started (step 104), and the state shifts to the outside line call state (step 105). As a result, the call time and the call charge of the key telephone 20 that has made an outside line are sequentially counted, and this is counted by the control means 4.
Is displayed on the display unit 24.

In the outside-line communication state (step 105), when a call to be counted is performed by the telephone to be counted, the call charge and the talk time of the telephone to be counted are totaled and registered in the storage unit 15 (step 106). , That IS
The DN line is released (step 107), and a series of processing ends. Aggregation is performed to manage how many times each key telephone has made a call within a predetermined period by using a call charge and a call time.In addition to the key telephone unit, an external line unit or a plurality of preset telephone units are used. The total may be calculated for each tenant composed of key telephones.

In the outside line communication state, the counting means 3
It is determined by the determining means 6 that the call charge counted in the step (c) exceeds the regulated call charge registered in the storage means 5, and if the restriction is imposed on the telephone set to be counted, the process proceeds to step 106 described above. The same processing as the call termination operation by the counting target telephone is performed.

On the other hand, when a hold operation is performed by the telephone to be counted in the external line call state, the external line is held, and the display of the call time and the call charge is interrupted (step 111). Step 11
Go to 2). It should be noted that, even in the outside line hold state, the counting of the call charge of the telephone to be counted and the counting of the call time are continuously performed.

Therefore, the outside line is held (step 11).
In 2), when the determining means 6 determines that the call charge counted by the counting means 3 exceeds the regulated call charge registered in the storage means 5 and the restriction is imposed on the telephone set to be counted, the above-described case is applied. The process proceeds to step 106, where the same processing as the call termination operation by the counting target telephone is performed. In addition, in the outside line hold state, when a re-answer operation for releasing the hold is performed by the counting target telephone, the call time and the call charge counted during the hold are continuously counted and the display is resumed (step 113), transition to the above-mentioned outside line communication state (step 105).

In the outside line hold state, when a response operation is performed by another key telephone different from the telephone to be counted, the call charge and the call time of the telephone to be counted are totaled and registered in the storage unit 15 ( Step 11
4). Then, the key telephone that has performed the hold response operation is set as a new telephone to be counted (step 115). Based on the charge information notified from the ISDN first, the call time and the telephone charge are counted for this key telephone. And display is newly started (step 116), and the state shifts to the outside line communication state (step 105).

As described above, before the start of a call, counting of the call fee is started based on the latest charge data notified from the ISDN network for each call, and the call fee is displayed. Suspends the display and resumes the display in response to the response again, so compared to the conventional method of counting and displaying the call charges based on the estimated charge data, The charges can be displayed with high accuracy, and can be displayed before and after the hold state.

Further, even when a hold-response operation is performed by another key telephone set different from the telephone set to be counted, the call charge is newly counted based on the charge information notified from the ISDN network before the start of the call. Since the call charge is displayed for the key telephone, the call charge for the key telephone can be accurately displayed even after re-answering the hold.

Also, before starting the call, the call charges are sequentially counted based on the latest charge data notified from the ISDN network for each call, and the counted call charges are compared with a preset regulated call charge to make a call. Since the decision of the regulation was made, compared to the case where the call regulation decision is made based on the call fee counted based on the standard fee data as in the past,
It is possible to make a more accurate call regulation decision.

Further, if a hold response operation is performed by another key telephone set different from the count target telephone after holding the outside line by the count target telephone, the IS
The call rate counting is newly started based on the charge information notified from the DN network, and the call count is sequentially compared with the preset regulated call rate to determine the call regulation. Therefore, it is possible to make an accurate call regulation determination even when the counting target telephone is transferred to another telephone.

Next, the operation of an outside conference call will be described with reference to FIG. An external conference call is a normal external telephone call, ie, a state in which one key telephone is connected to an external line, and another key telephone, ie, an interrupt telephone, participates in the external telephone call, and three or more parties make a call. It is in a state where it is done. In the following, a description will be given of a case in which the outside line communication state (step 105) shown in FIG. 5 is transferred to the outside line conference state via the outside line holding state (step 112) in which the outside line is held. It can also be applied when moving to.

In the outside line hold state (step 112 in FIG. 5), when a predetermined conference call operation is performed on the regulated telephone, the processing shifts to FIG. 6 and the interrupt telephone set in the conference call operation is replaced. (Step 12
1) The display of the call charge and the call time continuously updated by the counting means 3 while the outside line is on hold is restarted (step 122).
By controlling the switch 12 of the main device 10, the interrupt telephone is connected to the outside line call, and the operation shifts to the outside line call (step 123).

As a result, a call is made by the caller (outside line side) of the callee, the telephone set to be counted, and the interrupting telephone set. This external line conference call state (step 12)
In 3), if the end operation is performed on the counting target telephone, the counting target telephone is disconnected from the conference (step 1).
31), the call charge and the call time for the counting target telephone are totaled and registered in the storage unit 15 (step 13).
2).

Here, if there are no remaining key telephones (excluding the destination) connected to the external conference call (step 133: NO), if the remaining one key telephone is not subject to the restriction. (Step 139: Y
ES), the key telephone is set as a telephone to be counted (step 143). Then, while counting continuously from the value of the call charge and the call time counted corresponding to the original counting target telephone disconnected from the conference in the above-mentioned step 131, the calling charge and the new charging target telephone are counted. The display of the talk time is started (step 144), and the state of the outside line call between the new telephone to be counted and the destination (FIG. 5:
Move to step 105).

On the other hand, if there are a plurality of remaining in-conference button telephones (excluding the callee) connected to the external conference call (step 133: YES), the call charges continuously counted up to that time It is determined whether or not all the remaining telephones during the conference are subject to the call restriction (step 134). In this case, if individual restriction conditions are set for each key telephone, the determination is made based on the corresponding restriction conditions, here, the restricted call charges.

Here, if all the remaining telephones during the conference are not subject to the call regulation (step 134: NO), one of the telephones not subject to the call regulation is selected as a counting target (step 135). Then, while counting continuously from the value of the call charge and the call time counted corresponding to the original counting target telephone disconnected from the conference in the above-mentioned step 131, the calling charge and the new charging target telephone are counted. Start displaying the talk time (step 13)
6) Return to the outside line conference state (step 123).

On the other hand, if the remaining in-conference key telephones are not subject to the restriction in step 139 (step 13).
3: NO), and if all remaining telephones during the conference are subject to call regulation in step 134 (step 134: Y)
ES), after releasing the outside line of the call (step 13)
7) Extension call (conference) by all remaining telephones during the conference
Move to the state (step 138).

In the outside line conference state (step 123), when a call termination operation is performed by the interrupt telephone,
Disconnect the interrupted telephone from the conference (step 141),
If there are a plurality of remaining in-conference button telephones (excluding the call destination) (step 142: YES), the process returns to the outside line conference state (step 123). On the other hand, if there are no more remaining in-conference key telephones (excluding the call destination) (step 142: NO), the processing shifts to the outside line communication state (FIG. 5: step 105) via the above-described steps 143 and 144.

In the outside line conference state (step 123), if the call is terminated by the call destination (outside line side), the call charges and the call time for the telephones to be counted are totaled and registered in the storage unit 15 ( Step 151). Here, if there are no remaining in-conference key telephones (excluding the call destination) connected to the external conference call (step 152: NO), the above-described step 107 (FIG. 5)
Then, after the outside line is released, a series of processing ends.

On the other hand, if there are a plurality of remaining in-conference button telephones (excluding the callee) connected to the external line conference call (step 152: YES), the flow shifts to step 137 described above to release the external line. All the remaining telephones during the conference are in the extension (conference) state (step 138).
In addition, in the outside-line conference state (step 123), when the telephone call is restricted in the telephone to be counted, the process proceeds to step 107 (FIG. 5) described above, and after the outside line is released, a series of processing ends.

As described above, even if the telephone set to be counted is shifted to another telephone set during the outside conference, the ISD
The call charges are counted based on the charge information notified from the N network, and the call charges sequentially counted are compared with the preset regulated call charges to determine the call restriction. Even when the target telephone is shifted to another telephone, it is possible to make an accurate call regulation determination.

Also, since the counting is continued from the values of the call charge and the call time which have been counted corresponding to the original counting target telephone, the new counting target telephone is maintained even after shifting to another telephone. It is possible to display the call rate and the call time without any discomfort to the users of the system. Further, in the counting means 3, the call charges are individually counted for each key telephone from the time when the telephone is connected to the outside conference call as an interrupt telephone, and any telephone is newly counted. At this point, the call charges counted for the telephone may be continuously counted and used for call regulation and display of charges, and accurate call charges can be counted and displayed for each key telephone.

The key telephone device includes a wireless key telephone device in which a base unit corresponding to the main unit and a slave unit corresponding to the key telephone are connected in a wireless section. Also,
There is also a handset and a wireless button telephone device with a hands-free calling function in the base unit that can talk, and these wireless button telephone devices also use multiple child units and a base unit and child unit that can talk, in addition to holding an outside line Some allow external conference calls,
The present invention described above can be applied to such a wireless button telephone device.

In such a wireless key telephone device, there is a case where the display unit is provided only in the base unit without the display unit in the slave unit. In such a device, the call time and the call charge are reduced. What is necessary is just to display on a parent machine. In the case where the slave units are provided with a display unit, the display time of each slave unit may be displayed on the display unit of the respective slave units on the master unit.

When the slave unit is provided with a display unit, the communication time is counted by the counting means 7 of the slave unit in response to the counting start instruction from the master unit, as shown in FIG. Then, the display may be displayed on the display unit of the slave unit under the control of the control unit 8, or the number counted by the master unit may be notified to the slave unit and displayed. For call charges,
Notifying the slave unit of the fee information obtained by the detection means 2 of the master unit,
The counting may be performed by the counting means 7 of the slave unit.

In this case, the necessity of the call restriction is determined by the determination means 6 on the parent device side in the same manner as described above. For example, when the call regulation is determined based on the call charge, as shown in FIG. 7 (broken line), the call charge is counted by the counting means 3 based on the charge information detected by the detection means 2 at the time of calling.

Then, the judging means 6 compares the regulated call charge of the slave unit registered in the storage means 5 in advance with the call charge sequentially counted by the counting means 2. Thus, in the same manner as described above, the control means 4 determines whether the telephone call is charged based on the original charge information by the counting means 3 in accordance with a change in the state of the external telephone call due to a function such as hold transfer or external conference, and whether or not the target telephone is shifted. Is counted continuously or newly, and the display and call control are performed.

[0057]

As described above, according to the present invention, the receiving means for receiving the charge data notified from the ISDN after transmitting the call setting data at the time of calling, and the communication from the charge data received by the receiving means to the call. Detecting means for detecting the required fee, and counting means for counting the telephone charge of the telephone to be counted during an external call based on the fee information obtained from the fee data by the detecting means. In accordance with the change of outside line communication status and the presence / absence of transfer of the telephone to be counted, the call means is continuously or newly counted based on the original charge information by the counting means, and the display and the call regulation are performed. Even if the relatively complex functions unique to these key telephones are performed,
Call rate display and call regulation can be performed accurately.

[Brief description of the drawings]

FIG. 1 is a block diagram of a key telephone device according to an embodiment of the present invention.

FIG. 2 is a functional block diagram of the key telephone device according to the embodiment of the present invention;

FIG. 3 is a diagram showing a fee advance notification service in an ISDN network.

FIG. 4 is a format example showing fee data notified from an ISDN network.

FIG. 5 is a flowchart showing an outside line transmission process (external line call, outside line hold).

FIG. 6 is a flowchart showing an outside line transmission process (outside line conference).

FIG. 7 is a functional block diagram of a wireless key telephone device to which the present invention is applied.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Receiving means, 2 ... Detection means, 3 ... Counting means, 4 ... Control means, 5 ... Storage means, 6 ... Judgment means, 10 ... Main apparatus, 1
1 external line interface (external line I / F), 12 switch (SW), 13 internal line interface (extension line I / F)
F), 14 ... control unit (CPU), 15 ... storage unit, 16 ...
Power supply unit, 20 key telephone, 21 extension interface (extension I / F), 22 control unit (CPU), 23
Voice processing unit, 24 display unit, 25 operation unit.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kazunari Miwa 2-3-3 Shimomeguro, Meguro-ku, Tokyo F-term in Tamura Electric Co., Ltd. (reference) 5K024 AA22 AA53 BB04 CC04 FF03 5K025 AA01 AA08 BB10 CC03 EE02 FF27 HH06 JJ02 JJ03 JJ10 JJ13 JJ18 5K049 AA06 BB02 BB05 BB17 CC11 EE01 EE14 FF01 FF11 GG05 GG09 GG10 GG15 GG17 KK02 KK11 9A001 BB02 BB03 BB04 CC04 DD10 GG01 JJ12 KK56

Claims (5)

[Claims] 1. A button for connecting an ISDN line as an external line and accommodating a plurality of telephones, and counting a telephone charge of a button telephone during an external telephone call based on charge information indicating a charge required for the telephone call such as a call charge or an information charge. In the telephone device, receiving means for receiving charge data notified from the ISDN network after transmitting call setting data at the time of calling, detecting means for detecting a charge required for a call from the charge data received by the receiving means, Counting means for counting the telephone charges of the telephones to be counted during external calls based on the charge information obtained from the charge data by the detecting means; and displaying the call charges counted by the counting means in sequence.
A key telephone device comprising: a control unit that suspends display according to holding of an outside line by the counting target telephone, and resumes display according to subsequent release of holding by the counting target telephone. 2. The key telephone device according to claim 1, wherein the counting means newly starts counting the call charges based on the charge information in response to the release of the hold by a telephone different from the telephone to be counted. The key telephone device, wherein the control means sequentially displays the call charges whose counting has been newly started. 3. A button for connecting an ISDN line as an external line and accommodating a plurality of telephones, and counting a telephone charge of a button telephone during an external telephone call based on charge information indicating a charge required for the telephone call such as a call charge or an information charge. In the telephone device, receiving means for receiving charge data notified from the ISDN network after transmitting call setting data at the time of calling, detecting means for detecting a charge required for a call from the charge data received by the receiving means, Counting means for counting the telephone charge of the telephone set to be counted during an external call based on the charge information obtained from the charge data by the detecting means; A determination method for determining whether or not the outside-line call can be continued by comparing with a regulated charge set in advance as a call restriction condition of When, in response to continued not determined by the determining means, key telephone system characterized in that it comprises a control means for regulating the continuation of the outside call. 4. The key telephone apparatus according to claim 3, wherein, when the outside-line call is transferred to a telephone different from the telephone to be counted, the counting means newly starts counting the telephone charge based on the charge information. The determination means compares the call charge newly started by the counting means with the restriction charge set in advance as a call restriction condition per call for the destination telephone to which the external call is transferred. A key telephone device for determining whether or not external line communication can be continued. 5. The key telephone apparatus according to claim 3, wherein, in addition to the telephone set to be counted during an external call, another interrupt telephone is connected to the external line to enter an external line conference state. In the case of transfer to a telephone, the counting means continues counting the call charge based on the charge information, and the judging means determines whether the call charge continuously counted by the counting means is equal to the call rate per call. A key telephone device, which determines whether or not the outside line communication can be continued by comparing a regulated charge set in advance as a call restriction condition.