JPH06237318A - Electronic exchange system - Google Patents

Abstract

PURPOSE:To execute effective battery backup regardless of a small size and inexpensive system by extending an operation time of the system by an emer gency battery without increasing the capacity of the battery. CONSTITUTION:When an emergency battery 54 is used for a power supply, a remaining capacity detection section 56 of a private branch of electronic exchange EX detects reduction in the remaining capacity of the emergency battery 54 and informs it to each of extension telephone sets TEL1-TELn, a battery saving control means 72a is provided to each of extension telephone sets TEL1-TELn, and based on the remaining capacity of the emergency battery 54 informed from the private branch of electronic exchange EX and a power consumption reduction pattern stored in advance in a memory 73, the operation of a function corresponding lamp 86, a display device 83 and a power supply circuit 76 is limited selectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic exchange in which an electronic exchange is provided with an emergency battery and the output of the emergency battery is supplied to the communication terminal device instead of the output of the ordinary power supply when the ordinary power supply fails. Regarding the system.

[0002]

2. Description of the Related Art Conventionally, electronic private branch exchange systems have been widely used in offices and business establishments. This type of system typically includes an emergency battery. Then, when a failure such as a power failure occurs in the normal power supply such as the commercial power supply, the output of the normal power supply is switched to the output of the emergency battery, and the output of the emergency battery is not limited to each circuit in the electronic private branch exchange. By supplying power to the extension telephone,
During the period of commercial power failure, we will provide the same services as usual.

[0003]

However, the conventional electronic private branch exchange system provided with such an emergency battery always provides a service that is completely the same as the normal service even during a failure period of the normal power supply. Is configured.
As a result, the rated power continues to be consumed even during the failure of the normal power supply, and the capacity of the emergency battery is exhausted at a relatively early point. There was a problem that was not available. In addition, it has been attempted to increase the capacity of the emergency battery to extend the operating time, but this causes another problem that the emergency battery becomes large and expensive. .

The present invention has been made in view of the above circumstances, and an object thereof is to extend the operating time of a system using an emergency battery without increasing the battery capacity, thereby making it compact and inexpensive. The purpose is to provide an electronic exchange system that can provide sufficient backup.

[0005]

In order to achieve the above object, the present invention connects a plurality of communication terminal devices via a communication line to an electronic exchange having an emergency battery for backing up a normal power source. In the electronic exchange system,
The electronic exchange is provided with an emergency battery remaining capacity notification means, and each communication terminal device is provided with a power consumption variable control means. Then, in the electronic exchange, the remaining capacity notifying unit detects the remaining capacity of the emergency battery and notifies each communication terminal device of the detection information, and at each communication terminal device, the power consumption variable control is performed. According to the remaining capacity detection information notified from the electronic exchange and the preset power consumption reduction pattern, the operation of the predetermined circuit is stepwise limited from the operation with large power consumption to the operation with small power consumption. It is a thing.

Further, according to the present invention, the variable power consumption control means does not limit the operation of a predetermined circuit when the remaining capacity of the emergency battery is equal to or more than a predetermined amount. It is characterized in that the operation of a predetermined circuit is restricted accordingly.

Further, according to the present invention, in the power consumption variable control means, a plurality of power consumption reduction patterns are prepared, and these power consumption reduction patterns are selectively set to each communication terminal device according to its usage pattern. Is also featured.

[0008]

As a result, according to the present invention, in a state in which a failure occurs in the normal power source and the power source is switched to the emergency battery, the remaining capacity of the emergency battery is detected by the remaining capacity notifying means in the electronic exchange, Detection information is notified to each communication terminal device, in each communication terminal device, in accordance with the remaining capacity detection information of the emergency battery notified from the electronic exchange, and a preset power consumption reduction pattern,
The operation of a predetermined circuit such as the light emitting means and the display means is stepwise restricted from the operation with large power consumption to the operation with small power consumption. That is, while the emergency battery is in use, each communication terminal device performs battery saving according to the remaining capacity of the emergency battery. For this reason, the power consumption of each communication terminal device is reduced, thereby suppressing the consumption of the emergency battery. Therefore, the operation time of the system can be extended as compared with the case where the system is continuously operated without changing from the normal time. In addition, it is not necessary to increase the capacity of the emergency battery, which prevents the system from becoming large and increasing the cost.

Further, according to the present invention, when the remaining capacity of the emergency battery is equal to or more than the predetermined amount, the operation of the predetermined circuit is not restricted, and when the remaining capacity is less than the predetermined amount, the predetermined circuit is determined according to the power consumption reduction pattern. In the case of a power failure that can be recovered in a short period of time, it is possible to provide the same service as in the normal time by restricting the operation of.

Further, according to the present invention, a plurality of power consumption reduction patterns are prepared, and these power consumption reduction patterns are selectively set for each communication terminal device in accordance with its usage pattern. For less important communication terminals such as the telephones in the above, the operation is restricted at an early stage, while for the more important communication terminals such as the telephone for emergency communication, the capacity of the emergency battery is reduced. Also, it is possible to perform the operation until the final stage without performing the operation restriction or to reduce the restriction amount.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a functional configuration of an electronic private branch exchange system according to an embodiment of the present invention, where EX is an electronic private branch exchange and TEL1 to TELn are extension telephones.

The electronic private branch exchanges EX have extensions 11 to 1 respectively.
extension interface circuits 21 to 2n to which the extension telephones TEL1 to TELn are connected via n, respectively, and a station line 3 respectively.
Office line interface circuits 41 to 4 to which 1 to 3 m are connected
m, a switch circuit 50, a central control unit 51, a main memory 52, and an external interface circuit 53.

First, the switch circuit 50 exchanges and connects the extension interface circuits 21 to 2n and the extension interface circuits 21 to 2n and the station line interface circuits 41 to 4m in accordance with an instruction from the central control unit 51. . The main storage unit 52 is, for example, a ROM or R
The storage medium is a semiconductor memory such as AM or a hard disk, and stores the control program of the central control unit 51 and various data. External interface circuit 53
A maintenance terminal device 60 is connected to. The maintenance terminal device 60 is composed of, for example, a personal computer, and is used when newly setting or changing various data necessary for controlling the central control unit 51.

Further, the electronic private branch exchange EX of the present embodiment
Has an emergency battery 54 including, for example, a secondary battery as a power supply system, a power supply circuit 55, and a remaining capacity detection unit 56. The power circuit 55 has a commercial power output (AC10
0 V) and the output of the emergency battery 54 are respectively supplied. In a normal state where the commercial power supply output is normally supplied, the power supply circuit 55 generates a required DC voltage Vcc based on the commercial power supply output to supply power to each circuit in the exchange EX, while the commercial power supply is cut off. When a failure such as the above occurs, a necessary DC voltage Vcc is generated based on the output voltage of the emergency battery 54 to supply power to each circuit. The remaining capacity detection unit 56 monitors the output voltage value of the emergency battery 54, detects the remaining capacity of the emergency battery 54 from 100% to 0% at 10% intervals based on the output voltage value, and performs central control. Notify the unit 51.

By the way, the central control unit 51 has, in addition to ordinary control means such as call control and exchange control,
Power source switching control means 51a and remaining capacity notification control means 51
b. The power supply switching control means 51a shifts the operation mode of the system from the normal power supply operation mode to the emergency power supply operation mode when the power supply circuit 55 notifies the commercial power supply output abnormality, and conversely outputs the commercial power supply output from the power supply circuit 55. When the restoration is notified, the operation mode of the system is shifted from the emergency power supply operation mode to the normal power supply operation mode. The remaining capacity notifying unit 51b is in a state in which it is in the emergency power supply operation mode, and the remaining capacity detection unit 5b.
The remaining capacity of the emergency battery 54 detected by 6 is notified to each of the extension telephones TEL1 to TELn.

On the other hand, each of the extension telephones TEL1 to TELn is constructed as follows. 2 is a block diagram showing the circuit configuration thereof, and FIG. 3 is a plan view showing the configuration of the operation panel.
On the operation panel 81, the display 83 and the dial keys 8
4, a plurality of function keys 85, and a plurality of function key corresponding lamps 86 provided in a one-to-one correspondence with these function keys 85. The display device 83 is, for example, a liquid crystal display (LCD). On the LCD display 83, for example, the time is displayed during standby, and the telephone number and the call time of the other party are displayed during a call. The dial keys 84 are used for inputting the telephone number of the other party, inputting the calling time of the wake-up call, and the like. An extension call key, a one-touch call key, a redial key, a speed dial registration key, and the like are assigned to the function key 85. The function key compatible lamp 86 is
For example, it is composed of a light emitting diode (LED), and the state of the mode set by the operation of the corresponding function key 85 is displayed by blinking, turning on and off. Reference numeral 82 represents a handset.

The internal circuit of the telephone is the extension lines 11 to 1n.
And a control circuit 72 and a power supply circuit 76. A handset 82 is connected to the communication circuit 71. The control circuit 72 includes ROM and R
An AM memory 73, a dial key 84, a function key group 85, an LED drive circuit 74, and an LCD drive circuit 75 are connected to each other.
4, a function key corresponding lamp group 86 is connected, and an LCD drive circuit 75 is connected to a display 83.

The memory 73 stores programs and control data necessary for controlling the control circuit 72. This control data includes operation restriction item data and power consumption reduction pattern data as data used when the system is operated by the emergency battery 54. The operation restriction item data is the function key compatible lamp 8
6, each of the operations of the display unit 83 and the power supply circuit 76 is defined separately in the standby state and the normal state,
For example, as shown in FIG. 4, eight types of items A1 to A4 and B
1, B2, C1, C2.

The power consumption reduction pattern data has five types of patterns A to E. These patterns A ~
E corresponds to the remaining capacity of the emergency battery 54 set in 10% increments and corresponds to the above eight types of operation restriction items A1 to A
4, B1, B2, C1 and C2 are assigned, and are set as shown in FIG. 5, for example. Then, one of these power consumption reduction patterns is selectively set in each of the extension telephones TEL1 to TELn, and the set pattern is stored in the memory 73. Each extension telephone T
The setting of the power consumption reduction pattern for EL1 to TELn is performed according to the degree of importance in use of each extension telephone.
It can be changed and set by system maintenance personnel.

In the example shown in FIG. 5, the emergency battery 54
In the state where the remaining capacity of 100% to 70% of each of the patterns A to E, the operation restriction items A1 to A are set so that the operation restriction for reducing the power consumption is not performed in any of the patterns A to E.
4, B1, B2, C1, C2 are not set, 60% to 1
In the 0% state, different operation restriction items A1 to A4, B1, B2, C1 and C2 are set for the respective patterns A to E. The remaining capacity of the emergency battery 54 is 0%.
Then the system is stopped. Here, the emergency battery 54
The reason why the power consumption reduction operation is not performed for each of the patterns A to E when the remaining capacity of the power supply is 100% to 70% is that when a power failure that can be recovered in a short time occurs, This is to keep providing services that do not change.

The control circuit 72 has, for example, a microcomputer as a main control section, and is provided with a battery saving control means 72a in addition to ordinary control means such as call control and call control. When the electronic private branch exchange EX notifies the battery saving control means 72a that the electronic private branch exchange EX has transitioned to the emergency power supply operation mode, the emergency battery 54 is subsequently notified by the electronic private branch exchange EX.
Of the function key corresponding lamp 86 and the display 8 based on the remaining capacity detection data of the above and the power consumption reduction pattern (one of A to E) preset in the own extension telephone.
3 and the power supply circuit 76 are selectively controlled.

Next, the operation of the system configured as described above will be described. It is assumed that the electronic private branch exchange EX is 21
It accommodates the extension telephones TEL1 to TEL21,
It is assumed that power consumption reduction patterns A to E are set for these extension telephones TEL1 to TEL21, respectively, as shown in FIG.

In this state, it is assumed that the commercial power supply fails for some reason. Then, in the electronic private branch exchange EX, the power source is switched from the commercial power source to the emergency battery 54, and thereafter, the DC voltage Vcc is generated from the power supply circuit 55 based on the output voltage of the emergency battery 54, and the electronic private branch exchange EX.
Power is supplied to each circuit in the inside, and is further supplied to each of the extension telephones TEL1 to TEL21 via the extension. Further, at this time, the central control unit 72 of the electronic private branch exchange EX sets the electronic private branch exchange EX itself to the emergency power supply operation mode and notifies each extension telephone set TEL1 to TEL21 of the information indicating that the electronic private branch exchange EX has transitioned to the emergency power supply operation mode. . Then, after that, the emergency battery 54 is detected from the detection information of the remaining capacity detection unit 56.
The remaining capacity is monitored and each extension telephone TEL1 to TEL21 is notified of the remaining capacity detection data every time the remaining capacity decreases from 100% in 10% increments.

On the other hand, each extension telephone TEL1 to TEL
When the electronic private branch exchange EX is notified of the information indicating the transition to the emergency power supply operation mode, the control unit 21 starts the battery saving control while performing the incoming / outgoing call control and the call control.

That is, each extension telephone TEL1 to TEL
The control circuit 72 of 21 monitors the remaining capacity of the emergency battery 54 based on the remaining capacity detection data coming from the electronic private branch exchange EX. Then, in the period until the remaining capacity of the emergency battery 54 is reduced to 60%, as is clear from the power consumption reduction pattern B shown in FIG. Continue call control. FIG. 7 shows each extension telephone TEL1 to TEL1 at this time.
It is a figure which shows the state of the battery saving operation | movement of TEL21. Then, in this state, it is assumed that the commercial power source of the electronic private branch exchange EX is restored, and accordingly, an instruction to return from the electronic private branch exchange EX to the normal power supply operation mode arrives.
Then, the control circuit 72 of each of the extension telephones TEL1 to TEL21 stops the battery saving control at that point and returns to the normal control of only incoming and outgoing calls and calls.
Therefore, even in the state of the emergency power supply operation mode, if the commercial power supply is restored before the remaining capacity of the emergency battery 54 decreases to 60%, the extension telephone TEL is used.
In 1 to TEL 21, no operation limitation for battery saving is performed, and as a result, normal service is provided.

On the other hand, it is assumed that the electronic private branch exchange EX notifies that the remaining capacity of the emergency battery 54 has decreased to 60% while the battery saving control is being performed. Then, each extension telephone TEL1 to TEL2
In No. 1, according to the power consumption reduction pattern preset for each, the operation limitation corresponding to the remaining capacity of 60% is performed. For example, in the extension telephone TEL1, the operation restriction by the operation restriction item A2 is executed according to the power consumption reduction pattern B stored in the memory 73. This operation restriction item A2 is for constantly reducing the light emission amount of the function key corresponding lamp 86 as shown in FIG. Therefore, the control circuit 72 gives an instruction to the LED drive circuit 74 to reduce the illuminance of light emission. Therefore, the drive current value supplied from the LED drive circuit 74 to the function key corresponding lamp 86 is reduced, and thereby the power consumption of the extension telephone set TEL1 is reduced. Similarly, in the other extension telephones TEL2 to TEL21, battery saving is performed according to the operation restriction item corresponding to the remaining capacity of 60%. Figure 8 shows this remaining capacity of 60%
In this state, the operation limitation items of the extension telephones TEL1 to TEL21 are shown.

Next, it is assumed that the electronic private branch exchange EX notifies that the remaining capacity of the emergency battery 54 has decreased to 50%. Then, each extension telephone TEL1 to TEL
In No. 21, the operation limit corresponding to the remaining capacity of 50% is performed according to the power consumption reduction pattern preset for each. For example, in the extension telephone TEL1, the operation restriction item A4 is executed according to the power consumption reduction pattern B. This operation restriction item A4 is for constantly stopping the light emitting operation of the function key corresponding lamp 86 as shown in FIG. Therefore, the control circuit 72 gives an instruction to the LED drive circuit 74 to stop the light emitting operation. Therefore, the drive current value supplied from the LED drive circuit 74 to the function key corresponding lamp 86 becomes almost zero, and thereby the power consumption of the extension telephone set TEL1 is reduced. Similarly, in the other extension telephones TEL2 to TEL21, the operation limitation is performed by the operation limitation item corresponding to the remaining capacity of 50%. FIG. 9 shows each of the extension telephones TEL1 to TEL in the state where the remaining capacity is 50%.
21 shows operation restriction items 21.

Subsequently, it is assumed that the electronic private branch exchange EX notifies that the remaining capacity of the emergency battery 54 has decreased to 40%. Then, each extension telephone TEL1 to TE
At L21, the operation limitation corresponding to the remaining capacity of 40% is performed according to the power consumption reduction pattern preset for each. For example, in the extension telephone TEL1, according to the power consumption reduction pattern B, B1 is newly executed in addition to the operation restriction item A4. The operation restriction item B1 is
As shown in FIG. 4, the display operation by the display device 83 is stopped during standby. Therefore, the extension telephone TEL
In No. 1, the light emission operation of the function key corresponding lamp 86 is always stopped, and the LCD drive circuit 75 and the display 83 are stopped in the standby state, whereby the power consumption is further reduced. Similarly, another extension telephone T
Also in EL2 to TEL21, the remaining capacity is 40
The operation is restricted by the operation restriction item corresponding to%. FIG. 10 shows the operation restriction items of the extension telephones TEL1 to TEL21 in the state of the remaining capacity of 40%.

Similarly, it is assumed that the recovery of the commercial power supply is delayed and the remaining capacity of the emergency battery EX further decreases to 20%. Then, each extension telephone TEL1 to T
In the EL 21, the operation limitation corresponding to the remaining capacity of 20% is performed according to the power consumption reduction pattern preset for each EL 21. For example, in the extension telephone TEL1, according to the power consumption reduction pattern B, the operation restriction item A
4, B2 and C1 are executed respectively. At this time, the operation restriction item B2 is to always stop the display operation by the display device 83, and the operation restriction item C1 is the extension telephone set T excluding the control circuit 72 from the power supply circuit 76 during standby.
The power supply to each circuit in EL1 is stopped. Therefore, in the extension telephone TEL1, the light emitting operation of the function key corresponding lamp 86 and the display operation by the display 83 are always stopped, and further, the power supply from the power supply circuit 76 to each circuit is stopped in the standby state. This enables extension telephone TEL
The power consumption in 1 is further reduced. Similarly, in the other extension telephones TEL2 to TEL21, the operation limitation is performed by the operation limitation item corresponding to the remaining capacity of 20%. FIG. 12 shows operation restriction items of each of the extension telephones TEL1 to TEL21 in the state where the remaining capacity is 20%.

It is assumed that the recovery of the commercial power supply is further delayed and the remaining capacity of the emergency battery EX is reduced to 10%. Then, the extension telephones TEL1 to TEL20 except the extension telephone TEL21 in which the power consumption reduction pattern A is set.
Are all in the power supply stop state according to the operation restriction item C2. FIG. 13 shows the operation restriction items of the extension telephones TEL1 to TEL21 when the remaining capacity is 10%.

As described above, in the electronic private branch exchange system of the present embodiment, the emergency battery 54 is operated by the electronic private branch exchange EX while the power source is switched to the emergency battery 54.
Each extension telephone TEL1 to T
Each of the extension telephones TEL1 to TELn is provided with a battery saving control means 72a for notifying the ELn, and the battery saving control means 72a notifies the remaining capacity of the emergency battery 54 notified from the electronic private branch exchange EX and the memory 73. The operation of the function key corresponding lamp 86, the display 83 and the power supply circuit 76 is selectively restricted according to the power consumption reduction pattern stored in advance.

Therefore, according to the present embodiment, as the remaining capacity of the emergency battery 54 decreases, the contents of the operation restriction on each of the extension telephones TEL1 to TELn become gradually stricter, and the power consumption of the system gradually decreases. Will be done. Therefore, as compared with the case where the battery saving operation is not performed at all in the state where the emergency battery 54 is operating, the power consumption of the entire system is reduced, thereby extending the operating time of the system by the emergency battery 54. be able to. Further, it is not necessary to increase the capacity of the emergency battery 54, and as a result, it is possible to prevent the system from becoming large and the cost from increasing.

Further, in this embodiment, five types of power consumption reduction patterns are prepared, and the power consumption reduction patterns A to E are selectively set for each of the extension telephones TEL1 to TELn according to their importance in use. I am trying. Therefore, the contents of the battery saving can be made different for each of the extension telephones TEL1 to TELn, whereby the battery saving can be performed according to the usage form of each of the extension telephones TEL1 to TELn. For example, an extension phone that is important in the system, such as an extension phone used as a relay stand or an extension phone for emergency contact, has an emergency battery 54.
The operation limit is suppressed until the remaining capacity of
As a result, the operable state can be maintained for a long time.
On the other hand, extension telephones that are less frequently used and are not so important in the system, such as extension telephones used in conference rooms and warehouses, are subject to significant inconvenience in use by restricting operation from an early stage. It is possible to effectively reduce power consumption without giving a feeling.

Further, in this embodiment, the emergency battery 54
The operation restriction items of each of the power consumption reduction patterns A to E are set so that the operation restriction is not performed at all until the remaining capacity of the power consumption decreases to 60% or less. Therefore, even in the state of the emergency power supply operation mode, if the remaining capacity of the emergency battery 54 still has a margin, each of the extension telephones TEL1 to TEL1.
The operation of the TEL 21 can be maintained at the same level as in normal times. Generally, a failure such as a power failure in a commercial power source is often recovered in a relatively short time. Therefore, in the state where the remaining capacity of the emergency battery 54 still has a margin as described above, it is extremely effective in practice to ensure the same operation level as in the normal state.

The present invention is not limited to the above embodiment. For example, even if an incoming call is made to an extension telephone whose power supply operation is always stopped during use of the emergency battery 54, the extension telephone cannot be called. In this case, it is preferable to control so that the incoming call is transferred to another extension telephone capable of receiving the incoming call.

In the above-mentioned embodiment, the case where the function key corresponding lamp 86, the display 83 and the power supply circuit 76 are applied as the circuits whose operation is restricted has been described as an example. A circuit or the like may be applied.

In addition, circuits subject to operation restrictions, control procedures and control contents of battery saving control means, contents of power consumption reduction pattern data, types and configurations of electronic exchanges and communication terminal devices, normal power supplies and emergency batteries The types of the above can be variously modified and implemented without departing from the scope of the present invention.

[0038]

As described above in detail, in the electronic exchange system of the present invention, the electronic exchange is provided with the emergency battery remaining capacity notifying means, and each communication terminal device is provided with the power consumption variable control means. The remaining capacity notifying unit detects the remaining capacity of the emergency battery and notifies the respective communication terminal devices of the detection information, and in each communication terminal device, the power consumption variable control unit,
In accordance with the remaining capacity detection information notified from the electronic exchange and a preset power consumption reduction pattern, the operation of a predetermined circuit is stepwise limited from an operation with large power consumption to an operation with small power consumption.

Therefore, according to the present invention, the operating time of the system using the emergency battery can be extended without increasing the battery capacity, thereby providing a small and inexpensive electronic exchange system capable of performing sufficient battery backup. can do.

[Brief description of drawings]

FIG. 1 is a block diagram showing a functional configuration of an electronic private branch exchange system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of an extension telephone in the system shown in FIG.

3 is a plan view showing a configuration of an operation panel of an extension telephone in the system shown in FIG.

FIG. 4 is a diagram showing a correspondence relationship between operation restriction items and their contents.

FIG. 5 is a diagram showing an example of a power consumption reduction pattern.

FIG. 6 is a diagram showing an example of a setting state of a power consumption reduction pattern for each extension telephone.

FIG. 7: Remaining capacity of emergency battery is 100% to 70%
Of operation restriction items executed by each extension telephone in the state of FIG.

FIG. 8 is a diagram showing operation restriction items executed by each extension telephone when the remaining capacity of the emergency battery is 60%.

FIG. 9 is a diagram showing operation restriction items executed by each extension telephone when the remaining capacity of the emergency battery is 50%.

FIG. 10 is a diagram showing operation restriction items executed by each extension telephone when the remaining capacity of the emergency battery is 40%.

FIG. 11 is a diagram showing operation restriction items executed by each extension telephone when the remaining capacity of the emergency battery is 30%.

FIG. 12 is a diagram showing operation restriction items executed by each extension telephone when the remaining capacity of the emergency battery is 20%.

FIG. 13 is a diagram showing operation restriction items executed by each extension telephone when the remaining capacity of the emergency battery is 10%.

[Explanation of symbols]

EX: Electronic Private Branch Exchange TEL1 to TEL
n ... extension telephone 11-11n ... extension 21-2n ... extension interface circuit 31-3m ... station line 41-4m ... station line interface circuit 50 ... switch circuit 51 ... central control unit 51a ... power supply switching control means 51b ... remaining capacity notification Means 52 ... Main memory 53 ... External interface circuit 54 ... Emergency battery 55 ... Power supply circuit 56 ... Remaining capacity detector 60 ... Maintenance terminal 71 ... Call circuit 72 ... Control circuit 72a ... Battery saving control means 73 ... Memory 74 ... LED drive circuit 75 ... LCD drive circuit 76 ... Power supply circuit 81 ... Operation panel 82 ... Handset 83 ... Indicator 84 ... Dial key 85 ... Function key 86 ... Function key compatible lamp

Claims (3)

[Claims] 1. A plurality of communication terminal devices, and an emergency battery for accommodating these communication terminal devices via a communication line and having an emergency battery, wherein the emergency battery replaces the output of the normal power source when the normal power source fails. In an electronic exchange system including an electronic exchange that feeds the output of each of the communication terminal devices, the electronic exchange detects the remaining capacity of the emergency battery during use of the emergency battery, and outputs the detection information. A remaining capacity notifying unit for notifying each of the communication terminal devices is provided, and each of the communication terminal devices responds to the remaining capacity detection information notified by the remaining capacity notifying unit and a preset power consumption reduction pattern. , An electronic exchange characterized by comprising a power consumption variable control means for stepwise limiting the operation of a predetermined circuit from an operation having a large power consumption to an operation having a small power consumption. Stem. 2. The power consumption variable control means does not limit the operation of a predetermined circuit when the remaining capacity of the emergency battery is equal to or more than a predetermined amount, and when the remaining capacity of the emergency battery falls below the predetermined amount, a predetermined power consumption reduction pattern is determined. 2. The electronic exchange system according to claim 1, wherein the operation of the circuit is restricted. 3. The power consumption variable control means has a plurality of power consumption reduction patterns, and these power consumption reduction patterns are selectively set to each communication terminal device according to its usage pattern. The electronic exchange system according to claim 1, which is characterized in that.