JPH07336465A - Private branch switching system - Google Patents

Abstract

PURPOSE:To provide a private branch switching system capable of reducing the power consumption by controlling the power supply to a telephone terminal in accordance with the presence/absence condition of the owner of this telephone terminal. CONSTITUTION:Presence/absence states of users of digital telephone terminals 12 are stored in a RAM 1144 as an attendance/leaving data table, and this table and another attendance/leaving data table stored in the RAM 1144 before are compared with each other at intervals of a prescribed time counted by a tomer 1145; and if the user whose state is changed from 'presence' to 'absence' is detected as the result of this comparison, power supply to the corresponding digital telephone terminal 12 is stopped, and the terminating call to this terminal is terminated by the terminal, whose priority level preliminarily set for incoming is highest, out of digital telephone terminals 12 having the same extension number except the terminal to which power supply is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange system capable of controlling power supply to each terminal.

[0002]

2. Description of the Related Art Recently, a private branch exchange system has various advanced functions and provides users with various high value-added services. Further, in order for the user to use the advanced service, various terminals used by the user, such as a multifunctional telephone terminal, are inevitably used with high functionality.

However, these multifunction telephone terminals are
It is equipped with a large number of function keys and displays. When a call is received or a call is received, the built-in microprocessor and display are operated, and signal transmission with the private branch exchange is performed, so a large number of multifunction telephone terminals can be used. When used, the power consumption of the private branch exchange system becomes large.

Also, the electric power consumed is substantially the same as that at the time of use when the respective multifunction telephone terminals are on standby. Therefore, when each of the multi-function telephone terminals is not used at all, for example, in business establishments, a large amount of multi-function telephone terminals wastes much power even on holidays or at night.

As a countermeasure against this, in the conventional private branch exchange system, in order to reduce power consumption on holidays, nights, etc.,
The method of controlling the power supply to each multi-function telephone terminal by the detection result of the ON / OFF state of the electric lights and distribution board in the office and the control from the guard room is adopted.

FIG. 9 shows an example of a schematic configuration of a conventional private branch exchange system in consideration of the power feeding control as described above. In FIG. 9, reference numeral 10 denotes a private branch exchange in the private branch exchange system. The private branch exchange 10 has a central control unit 105 that integrally controls the private branch exchange system.

A communication path switch 101 is connected to the central control unit 105, and a terminal interface unit 102, a station line interface unit 103 and an external interface unit 106 are further connected to the communication path switch 101.

Then, the terminal interface unit 10
A telephone terminal 2 is connected to each of the two terminals 2, and an office line 3 is connected to each of the office line interface units 103. The external interface unit 106 is also connected to the electric lamp ON / OFF detection circuit 4, the distribution board ON / OFF detection circuit 5, and the control device 6 in the guard room.

In such a private branch exchange system,
The light OFF detection signal from the light ON / OFF detection circuit 4 is the distribution board OFF detection signal from the distribution board ON / OFF detection circuit 5 and the instruction signal from the control device 6 in the guard room is the external interface unit 106 and the bus 104. When it is sent to the central control unit 105 via the terminal control unit 105, the central control unit 105 determines that it is a power supply stop command and the terminal interface unit 102 to which the corresponding telephone terminal 2 is connected.
Send the power supply stop command to. The terminal interface units 102 that have received this power supply stop command will stop supplying power to the respective telephone terminals 2 connected thereto.

[0010]

However, in the private branch exchange system configured as described above, ON / OFF of the lights and distribution boards in the office can be detected only in a wide floor unit, and the control in the guard room is possible. At present, there is no choice but to give an instruction from the device 6 on a wide floor basis.

Therefore, after all the employees of the business office have left the company or when the business office is completely closed, even if there are only a few nighttime overtime workers or holiday workers, everything related to the private branch exchange system can be dealt with. Since the telephone terminal 2 is supplied with power for normal operation, the power consumption of the private branch exchange system is the same as in normal times, and a large amount of power is wasted. .

The present invention has been made in view of the above circumstances, and reduces power consumption by controlling power supply to a corresponding telephone terminal in accordance with the presence / absence of the telephone terminal owner. It is an object of the present invention to provide a private branch exchange system that enables the above.

[0013]

According to the present invention, in a private branch exchange system having a plurality of telephone terminals, a detecting means for detecting the presence / absence state of each user of the plurality of telephone terminals and the detecting means are provided. Storage means for storing the detected presence / absence state of the user of each telephone terminal, clock means for clocking time, presence / absence stored in the storage means at every predetermined time counted by the clock means It is composed of a comparison means for comparing the state and the presence / absence state before that, and a power supply control means for controlling whether or not to supply power to the telephone terminal in which the state change is detected according to the comparison result by the comparison means. .

According to the present invention, in a private branch exchange system having a plurality of telephone terminals having the same extension number and predetermined ringing tone priorities, the presence / absence state of each user of the plurality of telephone terminals is determined. Detecting means for detecting, storage means for storing the presence / absence state of the user of each telephone terminal detected by the detecting means, clock means for measuring time, and for every predetermined time counted by the clock means. Comparison means for comparing the presence / absence state stored in the storage means with the presence / absence state before that, and whether or not to supply power to the telephone terminal whose state change is detected according to the comparison result by the comparison means It is constituted by control means for controlling and controlling whether or not a ringing tone is given to the telephone terminal based on the priority.

[0015]

As a result, according to the present invention, in the private branch exchange system having a plurality of telephone terminals, the presence / absence state of each user of the plurality of telephone terminals is detected, and the detected telephone terminals are detected. The presence / absence state of the user is stored, the presence / absence state stored at predetermined time intervals is compared with the previous presence / absence state, and the telephone terminal in which the state change is detected according to the comparison result is displayed. Since the possibility of power supply is controlled, power supply to terminals that are not likely to be used can be stopped as appropriate, the minimum necessary power can be supplied, and the plurality of terminals can be operated efficiently.

According to the present invention, in the private branch exchange system having a plurality of telephone terminals having the same extension number and the priorities of whether ringing tones are permitted or not, the presence / absence of each user of the plurality of telephone terminals is provided. The state is detected, the detected presence / absence state of the user of each telephone terminal is stored, and the presence / absence state stored at every predetermined time is compared with the previous presence / absence state, and the comparison result is obtained. In accordance with the above, the power supply to the telephone terminal whose state change is detected is controlled and whether the ringing tone to the telephone terminal is controlled based on the priority order. As long as the user of the terminal having the same extension number is working, an incoming call can be made to the terminal corresponding to the extension number.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a digital private branch exchange system in this embodiment. In the figure, reference numeral 11 denotes a digital private branch exchange, to which a plurality of digital telephone terminals 12, a card reader 17, a plurality of office lines 13 and a host computer 14 are connected.

The digital private branch exchange 11 is a control unit 1
14, a communication path switch 111 is connected to the control unit 114. Control unit 114
Has a control unit 1141 that controls the entire digital private branch exchange system. The control unit 1141 is a bus 1142.
ROM 1143, RAM 1144 and timer 1 via
The communication path switch 111 is connected to the bus 1142 while the 145 is connected.

A plurality of digital telephone terminal interface units 112, an external interface unit 116, a plurality of office line interface units 113 and an external interface unit 115 are connected to the communication path switch 111.

Here, the communication path switch 111 comprises a plurality of digital telephone terminal interface units 112, an external interface unit 116, a plurality of office line interface units 113 and the external interface unit 1.
The operation of exchanging voice and various data with 15 is performed. Also R
The OM 1143 stores a control program of the digital private branch exchange system, and the RAM 1144 stores various data at the time of the exchange operation, a data table described later, and the like. The timer 1145 has a clock function.

The plurality of digital telephone terminal interface units 112 are each connected to the digital telephone terminal 12 which is a multifunctional telephone, and the external interface unit 116 is connected to the card reader 17. The station line 13 is connected to each of the plurality of station line interface units 113, and the host computer 14 is connected to the external interface unit 115.

Each of the plurality of digital telephone terminal interface units 112 has an interface function between the digital telephone terminal 12 and the digital private branch exchange 11, and the external interface unit 116 is a card reader 17.
And an interface function with the digital private branch exchange 11. In addition, a plurality of station line interface units 1
Reference numerals 13 have an interface function between the central office line 13 and the digital private branch exchange 11, respectively, and an external interface unit 115 has an interface function between the host computer 14 and the digital private branch exchange 11.

A time and attendance management terminal 15 is connected to the host computer 14, and the printer 1 is connected to the time and attendance management terminal 15.
6 is connected. Here, the time and attendance management terminal 15 comprises a personal computer, and the host computer 14
By accessing, the attendance / leaving status of each telephone terminal owner is managed, and the attendance / leaving status of each owner is output from the printer 16 as needed.

FIG. 2 shows a schematic configuration of the digital telephone terminal interface unit 112. In this case, the digital telephone terminal interface unit 112 has a data highway interface 1121. The data highway interface 1121 is connected to the interface control circuit 1122.

The interface control circuit 1122 has a function of controlling the entire digital telephone terminal interface unit 112, and connects the ping-pong transmission circuit 1123 and the driving coil 1124. Here, the ping-pong transmission circuit 1123 controls the ping-pong transmission between the digital private branch exchange 11 side and the digital telephone terminals 121 to 12m. The ping-pong transmission circuit 1123 is connected to one winding of the transformer 1125,
The other winding of 25 is connected to the digital telephone terminal 12 via a movable piece 1124a that is closed by the bias of the driving coil 1124. The other winding of the transformer 1125 is connected to a power feeding circuit 1126 for feeding power.

In this embodiment, one digital telephone terminal 12 is assigned to each employee in the office,
It shall be used. Further, the external interface unit 116 and the card reader 17 shown above constantly perform ping-pong transmission of data having a channel structure of 2B + D. The two B channels in 2B + D transmit voice and various data, and the D channel transmits connection signals, control signals, billing information, etc. between the card reader 17 and the digital private branch exchange 11.

Here, the card reader 17 detects the time and attendance status of each employee and the time of attendance by reading the contents of the time card held by each employee of the business office each time he / she goes to work or when he / she leaves. Information on Figure 3
As shown in (a) and (b), 2B + D data is sent to the external interface unit 116.

In this case, T in FIGS. 3 (a) and 3 (b)
11 and T12 indicate attendance / leaving data. Attendance and attendance data T11 and T12 are "flag" 3a, "employee ID" 3
b, “Attendance and leave type” 3c, and “Attendance and leave time” 3d.

In the figure, the "flag" 3a is used for the external interface unit 116 to recognize that the data is attendance / leaving data from the card reader 17.
When it is "1", it indicates that it is attendance and attendance data, and when it is "0", it indicates that it is not attendance and attendance data. The “employee ID” 3b indicates an individual ID assigned to each employee. “Attendance / leaving type” 3c indicates the type of attendance or leaving, and when “attending” indicates that the corresponding employee has attended the office, and when “attending” indicates that he / she has left. "Attendance time" 3d indicates the time of attendance or departure.

In the attendance / leaving data T11 in this embodiment, "flag" 3a is "1", "employee ID" 3b is "0001", "attendance / leaving type" 3c is "leaving", and "attending / leaving time" 3d is "18". "00".

In the attendance / leaving data T12, "flag" is set.
3a is "1", "Employee ID" 3b is "0007",
"Attendance and leave type" 3c is "leave" and "Attendance time" 3d is "19:00".

Then, the external interface unit 11
The time and attendance data T11 and T12 sent to No. 6 are sent to the control unit 1141 via the communication path switch 111 and the bus 1142 and subjected to appropriate processing, and the time and attendance data as shown in FIG. 4, FIG. 5 and FIG. Bus 1142 as a table
It will be stored in the RAM 1143 via the. The differences between FIGS. 4, 5, and 6 will be described later.

In the attendance / leaving data tables T2, T3, T4 shown in FIGS. 4, 5, and 6, "data number" 4a is a number assigned to each row-direction data group of the attendance / leaving data table. For example, in the time and attendance data table T2 shown in FIG. 4, "data number" 4a is "1" to "7", respectively.
The data D21 to D27 are indicated by "data number" 4a, "terminal number" 4b, "extension number" 4c, "employee ID" 4d, "attendance / leaving status" 4e, "terminal ringing information" 4f, "ringing priority", respectively. “Each item has 4 g. This is data D31 to D37 in the time and attendance data table T3 shown in FIG. 5, and data D41 to D4 in the time and attendance data table T4 shown in FIG.
The same applies to 7.

Here, the "terminal number" 4b is a number individually assigned to each digital telephone terminal 121 to 12m, the "extension number" 4c is the extension number of the terminal used by each employee,
The “employee ID” 4d indicates an individual ID assigned to each employee. "Attendance status" 4e indicates the status of work as "present" or "absent". When "present", the employee corresponding to the "employee ID" 4d is present,
If you are absent, you are out.

The "terminal ringing information" 4f indicates whether to ring the ringer of the corresponding terminal when an incoming call arrives. In the case of "Ring", the ringer of the terminal having the corresponding "terminal number" 4b is used. Ringing, "No Ring"
In the case of, it indicates that it does not ring. This "terminal ringing information" 4f shall be "No Ring" at least at the time when the relevant employee leaves the office.

The "ringing priority" 4g indicates the priority order in which, when the same extension number is used for a plurality of terminals, a ringing tone for notifying an incoming call is output by these plurality of terminals.

Each terminal assigned to each employee has an individual terminal number, but a plurality of terminals may use the same extension number. In this case, there may be a case where it is not necessary to ring the ringer for notifying the incoming call at all terminals having the same extension number.

In the present embodiment, when there are a plurality of terminals having the same extension number, when at least one employee who uses those terminals is working, the ringer of any one of the plurality of terminals is activated. The ringing priority is the priority of the terminal for that purpose. When all the employees who use the plurality of terminals are away from work, power supply to all of the plurality of terminals is stopped, and thus the ringer does not ring.

In the time and attendance data table T2, for example, in the case of the data D21 whose "data number" 4a is "1",
"Terminal number" 4b is "01", "Extension number" 4c is "0"
101 "," Employee ID "4d is" 0001 "," Attendance status "4e is" Available "," Terminal ringing information "4f is" Ri "
ng "and" ringing priority "4g are" 1 ".

In this data D21, the employee assigned the employee ID "0001" is assigned the terminal number "0".
The terminal with the extension number "1" and the extension number "0101" is normally used. This employee is working, and the ringer of the terminal with the terminal number "01" is in a ringing state.

In the attendance / leaving data table T2, the data D25 in which the "data number" 4a is "5", the data D26 in which the "data number" 4a is "6", and the "data number" 4a are "7". A case where the "extension number" 4c is the same among a plurality of data as in the data D27 may occur. This is a case where one extension number is used by a plurality of terminals.

Next, the operation of the digital private branch exchange system configured as described above will be described based on the flowcharts shown in FIGS. In the present embodiment, each employee of the business office causes the card reader 17 to read the time card assigned to him / her every time he / she goes to work and when he / she leaves. At the present moment, it is assumed that the attendance / leaving data table T2 is stored in the RAM 1144 as shown in FIG.

First, as shown in data D21, "employee ID" 4d is "0001" and "terminal number" 4b is "0".
A case will be described in which an employee who has stored "1" and "extension number" 4c as "0101" leaves the office.

Now, when this employee reads his or her time card into the card reader 17 to leave the office, the card reader 17 uses the attended attendance information of the employee to read the attendance data such as shown in FIG. 3A. Configure T11. In the attendance / leaving data T1, the "flag" 3a is set to "1", which indicates that this data is attendance / leaving data. And "Employee ID" 3
“B” is “0001”, which indicates that the data is attendance / leaving data of an employee assigned with the ID of “0001”. Furthermore, since the "attendance / leaving type" 3c is "leaving" and the "attendance / leaving time" 3d is "18:00", this employee has read the time card to the card reader 17 at 18:00 because he / she is leaving. It is shown that.

The card reader 17 is the same as that shown in FIG.
The attendance / leaving data T11 as shown in (a) is sent to the external interface unit 116. The external interface unit 116 uses the "flag" in the attendance / leaving data T1.
Since 3a is "1", it is recognized that the data is attendance / leaving data, and the attendance / leaving data T11 is set to the communication path switch 11
1 and the bus 114 to the control unit 1141.

Then, the control unit 1141 uses the attendance / leaving data T11 as a basis to store data in the RAM 114 via the bus 1142.
The attendance / leaving data table T2 stored in advance in FIG. 4 is rewritten to the attendance / leaving data table T3 as shown in FIG. 5, and is stored in the RAM 1144 separately from the attendance / leaving data table T2.

The attendance / leaving data table T2 is stored in the RAM 1144 before the employee leaves the office, as described above.
This is the data table T that is stored in
2, "Employee ID" 3b of attendance data T11
In the data D21 having the same "employee ID" 4d as "0001", the "attendance / leaving state" 4e that is "present" is rewritten as "absent" as shown in FIG. It will be stored in the RAM 1144 separately from the time and attendance data table T2.

From this state, the control unit 1141 uses the timer 1145 at step s1 for a predetermined time (for example, 10 seconds).
Minutes and 1 hour) are monitored. When it is detected that the predetermined time has elapsed, the RAM is stored in step s2.
Two attendance data tables T2 and T3 are read from 1144.

In step s3, the attendance / leaving data tables T2 and T3 that have been read are compared, and the "attendance / leaving state" 4
It is determined whether or not the data whose item e is changed from "present" to "absent" exists in the data D31 to D31. And
When a changed one of these data D31 to D3l is detected (in this case, data D31 which is "data number" 4a "1"), the "extension number" 4c is changed in step s4.
It is detected whether or not there are data D31 to D31 having the same "extension number" 4c as "(0101" in the data D31).

Here, since there is no data having the same "extension number" 4c, the "terminal ringing information" 4f in the data D31 is "Ring" in step s5.
If it is "Ring", it is changed from "Ring" to "No Ring" in step s6, stored in the RAM 1144 as the attendance / leaving data table T4 in place of the attendance / leaving data table T2, and in step s7. Then, the power supply stop signal for stopping the power supply is sent to the digital telephone terminal interface unit 112 of the terminal corresponding to the "terminal number" 4b "1".

When the power supply is stopped, the control unit 114
The power supply stop signal sent from the No. 1 is received by the data highway interface 1121 in the corresponding digital telephone terminal interface unit 112 via the bus 1142 and the communication path switch 111.

This power supply stop signal is sent from the data highway interface 1121 to the interface control circuit 112.
Sent to 2. The interface control circuit 1122
When the power supply stop signal is recognized by the interface control circuit 1122, the interface control circuit 1122 sends a corresponding signal to the drive coil 1124 to open the power supply relay 1124a.
Will stop the power supply to.

Next, as shown in the data D27 in the time and attendance data table T2, the "employee ID" 4d is "0".
007 "," terminal number "4b is" 04 "," extension number "
A case will be described in which an employee whose 4c stores "0303" leaves the office.

Now, when this employee reads his or her time card into the card reader 17 for leaving the office, the card reader 17 uses the attendance and attendance information of the employee read in, as shown in FIG. Make up. In the attendance / leaving data T12 here, the "flag" 3a being "1" indicates that this data is attendance / leaving data. And "Employee ID" 3
“B” is “0007”, which indicates that the data is attendance / leaving data of the employee assigned the ID of “0007”. Furthermore, since the "working / leaving type" 3c is "working" and the "working / leaving time" 3d is "19:00", this employee read the time card into the card reader 17 at 19:00 to work. It is shown that.

The card reader 17 is shown in FIG.
The attendance / leaving data T12 as shown in (b) is sent to the external interface unit 116. The external interface unit 116 recognizes that it is attendance / leaving data because the "flag" 3a in the attendance / leaving data T12 is "1", and the attendance / leaving data T1 is controlled by the control unit 1141 via the communication path switch 111 and the bus 114. Send to.

Then, the control unit 1141 uses the attendance / leaving data T12 as a basis to store data in the RAM 114 via the bus 1142.
The attendance / leaving data table T2 stored in advance in FIG. 4 is rewritten as the attendance / leaving data table T3 as shown in FIG. 5, and is stored separately from the attendance / leaving data table T2.

Here, the attendance / leaving data table T2 is stored in the RAM 1144 before the employee leaves the office, as described above.
This is the data table T that is stored in
2, "Employee ID" 3b of attendance data T12
In the data D27 having the same "employee ID" 4d as "0007", the data in which the "attendance / leaving status" 4e is "present" is rewritten as "absent" as shown in FIG. It will be stored in the RAM 1144 separately from the time and attendance data table T2.

From this state, the control unit 1141 uses the timer 1144 in step s1 for a predetermined time (for example, 10 seconds).
Minutes and 1 hour) are monitored. When it is detected that the predetermined time has elapsed, the RAM is stored in step s2.
Two attendance data tables T2 and T3 are read from 1144.

Then, in step s3, the attendance / leaving data tables T2 and T3 are compared, and it is determined whether or not the data in which the item of "attendance / leaving status" 4e is changed from "present" to "absent" is in the data D31 to D3l. To do. Then, when a changed one of these data D31 to D3l is detected (in this case, the data D3 which is the "data number""7").
7), the "extension number" 4c (data D in step s4)
At 37, it is detected whether or not the data having the same "extension number" 4c as "0303") exists in the data D31 to D3l.

When data having the same "extension number" 4c exists (in this case, "data number")
The data D35 of "5" and the data D36 of "data number""6") and the "terminal ringing information" 4f of the data D37 in which the "attendance / leaving state" 4e is changed from "absent" to "present" in step s8. Is it "Ring", then step s
9, the "attendance / leaving status" 4 of the data having the same "extension number" 4c (in this case, the data D35 of "data number""5" and the data D36 of "data number""6")
It is determined whether e is “present”.

In this case, it is determined in step s8 that the "terminal ringing information" 4f of the data D37 is "Ring",
Further, in step s9, it is determined that both the "attendance / leaving status" 4e of the data D35 and D36 are "present".

Then, these data D35 and data D3
6, the highest "ringing priority" 4g is detected in step s10 (in the present embodiment,
D35 "ringing priority" 4g is "1"
Then, since the "ringing priority" 4g of D36 is "2", the data D35 is applicable).

Then, in step s11, the data D3
The “terminal ringing information” 4f of 5 is changed from “No Ring” to “Ring” as shown in the data D45 of FIG. 6, and the “terminal ringing information” 4f of data D37 is changed from “Ring” as shown in the data D47. "No Rin
g ”and store it in the RAM 1144 as the attendance / leaving data table T4 instead of the attendance / leaving data table T2, and at the same time, supply the power supply stop signal for stopping the power supply in step s12 to the digital telephone terminal of the terminal corresponding to the“ terminal number ”4b“ 7 ”. It will be sent to the interface unit 112.

After that, the power supply stopping operation is the same as that described above. At the time of each employee going to work, the "attendance / leaving status" 4e is changed from "absent" to "present",
The "ringing priority" 4g is also initialized, and the suspension of power supply is released.

Therefore, according to such an embodiment, the presence / absence state of each user of the digital telephone terminal 12 is stored in the RAM 1144 as the attendance / leaving data table T3, and every predetermined time counted by the timer 1145.
Attendance data table T3 and RAM 1144 before that
Comparing the time and attendance data table T2 stored in
When a user whose "present" is "absent" is detected in the comparison result, power supply to the corresponding digital telephone terminal 12 is stopped, so power supply to a terminal that is not likely to be used Can be stopped appropriately, and the minimum necessary power is supplied,
Each terminal can be operated efficiently, which can significantly reduce the power consumption in the private branch exchange system.

Further, since the terminal to which the power supply is stopped is made to be received by the terminal having the highest ringing priority preset for the incoming call among the digital telephone terminals 12 having the same extension number except the terminal. As long as the user of the terminal having the same extension number as the terminal whose power supply has been stopped is at work, it is possible to make an incoming call to the terminal corresponding to the extension number, thereby reducing the power consumption in the private branch exchange system. It is possible to significantly reduce the number and to use the private branch exchange system efficiently. In addition,
The present invention is not limited to the above-mentioned embodiments, and can be carried out by appropriately modifying it within the scope of the invention.

[0067]

According to the present invention, in a private branch exchange system having a plurality of telephone terminals, the presence / absence state of each user of the plurality of telephone terminals is detected, and each detected telephone terminal is used. Person's presence / absence state is stored, the presence / absence state stored at predetermined time intervals is compared with the previous presence / absence state, and power is supplied to the telephone terminal in which a state change is detected according to the comparison result. Since I tried to control the availability of
It is possible to stop power supply to terminals that are not likely to be used,
It is possible to supply the minimum required power and to operate the plurality of terminals efficiently, which can significantly reduce the power consumption in the private branch exchange system.

According to the present invention, in the private branch exchange system having a plurality of telephone terminals having the same extension number and the priorities for allowing ringing tones determined in advance, the presence / absence of each user of the plurality of telephone terminals. The state is detected, the detected presence / absence state of the user of each telephone terminal is stored, and the presence / absence state stored at every predetermined time is compared with the previous presence / absence state, and the comparison result is obtained. In accordance with the above, the power supply to the telephone terminal whose state change is detected is controlled and whether the ringing tone to the telephone terminal is controlled based on the priority order. As long as the user of the terminal having the same extension number is working, it is possible to make an incoming call to the terminal corresponding to the extension number, thereby significantly reducing the power consumption in the private branch exchange system. Together, it is possible to use a private branch exchange system efficiently.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a digital private branch exchange system according to an embodiment.

FIG. 2 is a diagram showing a schematic configuration of a digital telephone terminal interface unit 112 in one embodiment.

FIG. 3 shows attendance / leaving data T11 and T12 in one embodiment.
The figure which showed.

FIG. 4 is a diagram showing an attendance / leaving data table T2 in one embodiment.

FIG. 5 is a diagram showing an attendance / leaving data table T3 in one embodiment.

FIG. 6 is a diagram showing an attendance / leaving data table T4 in one embodiment.

FIG. 7 is a flowchart showing the operation of the digital private branch exchange system according to the embodiment.

FIG. 8 is a flowchart showing the operation of the digital private branch exchange system in one embodiment.

FIG. 9 is a diagram showing a schematic configuration of a conventional private branch exchange system.

[Explanation of symbols]

11 ... Digital private branch exchange, 111 ... Communication path switch,
114 ... Control unit, 1141 ... Control part, 1142 ...
Bus, 1143 ... ROM, 1144 ... RAM, 1145
... Timer, 112 ... Digital telephone terminal interface unit, 12 ... Digital telephone terminal, 116 ... External interface unit, 17 ... Card reader, 113 ... Station line interface unit, 115 ... External interface unit, 13 ... Station line, 14 ... Host computer 1
5 ... Attendance management terminal, 16 ... Printer, 1121, ... Data highway interface, 1122 ... Interface control circuit, 1123 ... Ping-pong transmission circuit, 1125 ...
Transformer, 1126 ... Feeding circuit, 1124 ... Driving coil, 1124a ... Feeding relay.

Claims (2)

[Claims] 1. In a private branch exchange system having a plurality of telephone terminals, detecting means for detecting presence / absence states of users of the plurality of telephone terminals, and use of each telephone terminal detected by the detecting means. Storage means for storing the presence / absence state of a person, clock means for measuring time, presence / absence state and previous presence / absence stored in the storage means for each predetermined time counted by the clock means A private branch exchange system comprising: comparison means for comparing states; and power supply control means for controlling whether or not to supply power to a telephone terminal in which a state change is detected according to a comparison result by the comparison means. 2. In a private branch exchange system having a plurality of telephone terminals having the same extension number and predetermined ringing tone priorities, the presence / absence state of each user of the plurality of telephone terminals is detected. Detecting means, storage means for storing the presence / absence state of the user of each telephone terminal detected by the detecting means, clock means for counting time, and the storage for each predetermined time counted by the clock means. Comparing means for comparing the presence / absence state stored by the means with the presence / absence state before that, and controlling whether or not to supply power to the telephone terminal in which a state change is detected according to the comparison result by the comparing means. A private branch exchange system further comprising: a control unit for controlling whether or not a ringing tone is given to the telephone terminal based on the priority.