JP3688893B2 - Button telephone with power failure function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a button telephone with a power failure function, and in particular, a call on an ISDN outside line when the AC power supply of the main device is energized can be kept as it is even if the power is interrupted during a call and the call is interrupted. Further, the present invention relates to a key telephone with a power failure function that can hold an ISDN external line call in a power failure state even if power is restored during the call.
[0002]
[Prior art]
A telephone is a communication device that is directly used by an unspecified number of people for voice communication, and functions such as electroacoustic conversion and side-to-side sound transmission for voice transmission and exchange of selection signals, ringing signals, etc. It has a function to do. A key telephone is known as one of telephones. The button telephone accommodates a plurality of ISDN telephone lines, and allows these lines to be shared by extension telephones and allows mutual calls between the extension telephones. Therefore, the cost of using the line can be reduced, and any extension telephone can supplement the office line, so that a proxy response can be made.
[0003]
System-type telephone devices such as home telephones and business phones, or button telephone devices, such as making / receiving calls to / from any station line, holding a station line during a call, transferring a call to another phone, etc. With this function, the apparatus can efficiently use one to a plurality of office lines with a plurality of telephones.
[0004]
As a control method for the system telephone apparatus, a method is adopted in which the control signal is digitized and processed by a microprocessor. There are two types of wiring systems: a bus type in which a plurality of telephones are connected on the same cable, and a star type in which the main unit is individually wired to each telephone.
[0005]
An example of a bus type system in which a key telephone is used will be described. As shown in FIG. 3, the bus type system includes a main unit 11, a personal computer 12, a standard telephone 13, a telephone with an answering machine function and a power failure function, a digital cordless telephone handset 15, and an answering machine 16 with a color LCD (liquid crystal display) display. , A FAX (facsimile) device 17 and the like, and a bus 18. The personal computer 12 is connected via a personal computer adapter 121. The digital cordless telephone handset 15 is connected via a digital cordless phone connection device 151. The answering machine 16 with a color LCD display uses a video line 161 and is connected via a TV adapter 162 and can also be connected to a color camera door phone 163. The FAX apparatus 17 is connected via a telephone adapter 171. The bus 18 connects the main device 11 with a personal computer 12, a standard telephone 13, a telephone with an answering function and a power outage function 14, a digital cordless telephone cordless handset 15, an answering telephone 16 with a color LCD display, a FAX apparatus 17, and the like. .
[0006]
On the other hand, ISDN (integrated services digital network), which is a comprehensive service digital network constructed in recent years, has been developed. In this ISDN, voice is transmitted in full duplex as a 64 kbit / s digital code, and a signal transmission / reception channel with an exchange is provided independently of the voice transmission channel. In a digital telephone applied to this communication network, a codec (CODEC) is required for the call system. However, since the subscriber line is logically formed of a four-wire system, a side-side sound circuit is not required, and a side sound is not required. Can also be set to an appropriate value in terms of call quality.
[0007]
The basic telephone functions for outgoing / incoming calls and telephone calls are designed so that they can be operated with the power supplied from the station so that they can be used even in the event of a power failure, but the main unit to which a conventional ISDN button telephone is connected 20 notifies the station of the interruption at the time of a power failure, and even if it receives an ACK (acknowledgment) from the station, it cannot respond to the station after that, so that the call is disconnected from the station. There was. Further, if the main device 20 is in a power failure state and the power is restored during a call with the ISDN outside line, the call is disconnected because the conventional telephone cannot respond to the activation request from the main device 20. There was a problem. As shown in FIG. 4, the conventional ISDN key telephone 30 includes a CPU (central processing unit) 31, a main unit interface 32, a telephone unit 33, and the like. The CPU 31 controls the operation of the key telephone 30 as a whole. The main device interface 32 connects the key telephone 30 and the main device 20. The telephone unit 33 performs a telephone call or the like of the key telephone 30. However, the conventional ISDN key telephone 30 cannot execute incoming or outgoing calls via the main device 20 because the function of the main device 20 stops when the main device 20 fails.
[0008]
[Problems to be solved by the invention]
The present invention solves such a problem, and when the main unit notifies the station of interruption at the time of a power failure, it can hold the call as it is simply by interrupting the call with the ISDN outside line, It is another object of the present invention to provide a key telephone with a power failure function capable of maintaining a telephone call as it is even if the ISDN external line telephone used in a power failure state is restored.
[0009]
[Means for Solving the Problems]
According to the present invention, in a button telephone with a power failure function, which is connected to a main apparatus for connecting a plurality of ISDN external lines and includes a CPU, a main apparatus interface, a telephone unit, etc., an energization detecting means for detecting energization of the main apparatus, Station status confirmation means for confirming the call status of the station, and when the station status confirmation means confirms the call status of the station at the time of a power failure of the main unit and receives an interruption status notification from the station, it requests the station to resume the call It is a button telephone with a power failure function provided with a call resumption request means.
[0013]
Further, the present invention is a button phone with a power failure functions of the activation request receiving means for receiving an activation request from the main unit.
[0014]
And this invention is a key telephone with a power failure function provided with the activation means activated in response to the activation request | requirement from the main apparatus.
[0015]
Furthermore, this invention is a button telephone with a power failure function provided with an answering machine function.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described.
An embodiment of the telephone with a power failure function according to the present invention will be described with reference to FIGS. FIG. 1 is an explanatory diagram of a button telephone with a power failure function according to an embodiment. FIG. 2 is an explanatory diagram of an operation of the key telephone with a power failure function according to the embodiment during a call or the like. FIG. 3 is an explanatory diagram of an example of a system in which the power telephone function-equipped key telephone is used.
[0017]
First, an example of a bus type system in which the button telephone with a power failure function of the present invention is used will be described. As shown in FIG. 3, this bus type system is the same as that of the prior art, and includes a main device 11, a personal computer 12, a standard telephone 13, a telephone with answering function and power failure function 14, and a digital cordless telephone cordless handset 15. And an answering machine 16 with a color LCD display, a FAX device 17 and the like, and a bus 18. The main apparatus 11 is connected to a personal computer 12, a standard telephone 13, a telephone with an answering function and a power outage function 14, a digital cordless telephone cordless handset 15, an answering telephone 16 with a color LCD display, a FAX apparatus 17, and the like via a bus 18. The personal computer 12 is connected to the bus 18 via the personal computer adapter 13. The digital cordless telephone handset 15 is connected to the bus 18 via the digital cordless phone connection device 151. The answering machine 16 with a color LCD display uses a video line 161 and is connected to the bus 18 via the TV adapter 162 and can be connected to a color camera door phone 163. The FAX machine 17 is connected to the bus 18 via the telephone adapter 171.
[0018]
Next, examples will be described. As shown in FIG. 1, the button telephone 30 with a power failure function of this embodiment is connected to a main apparatus 20 for connecting a plurality of ISDN external lines, and includes a CPU 31, a main apparatus interface 32, a telephone section 33, and the like. Furthermore, an ISDN interface 34, a call resumption request unit 35, a station state confirmation unit 36, an energization detection unit 37, an activation request reception unit 38, and an activation unit 39 are provided. The CPU 31, the main device interface 32, the telephone unit 33, and the like are the same as in the conventional example. However, the ISDN interface 34 in the button telephone with a power failure function of the present embodiment connects the telephone 30 with a power failure function and the station at the time of a power failure of the main device. The call resumption request means 35 receives a call state interruption notification from the station and requests the station to resume the call. The station state confirmation means 36 confirms the communication state of the station. The energization detection unit 37 detects energization of the main device 20. The activation request receiving unit 38 receives an activation request from the main apparatus 20. The activation means 39 is activated in response to an activation request from the main device 20.
[0019]
(1) About the key telephone 30 with a power failure function of a present Example, operation | movement when the main apparatus 20 carries out a power failure at the time of an incoming call is demonstrated using FIG.
1a) The key telephone 30 receives a call from the caller, and the main apparatus 20 and the station are in a “calling state”.
1b) The main device 20 becomes a power failure, and the main device 20 notifies the station of “interruption notification”.
1c) The station receives “notification of interruption” and notifies the main apparatus 20 of “ACK”. At that time, the voltage is held for 0.5 seconds.
1d) The key telephone detects a power failure of the main apparatus 20 by the energization detection means 36 within 0.5 seconds, and notifies the station of a “station state confirmation request” by the station state confirmation means 35.
1e) The station notifies the “station state confirmation request” of “notification of interruption status”.
1f) The key telephone 30 receives the “interruption state notification”, and requests the station from the call resumption request means 34 for a “resume request”.
1g) Upon receiving the “resume request”, the station changes the “suspended state” to the “calling state”, so that the caller, the station, and the key telephone are in the “calling state”.
[0020]
(2) Next, the case where the main device makes an external call in a power failure state and the power failure of the main device is restored will be described with reference to FIG.
2a) The key telephone 30 is in a call with the caller in the “calling state” of the main device 20 and the station.
2b) The power failure of the main device 20 is restored, and the main device 20 requests the key telephone 30 for an “activation request”.
2c) The main device 20 requests the “activation request” from the key telephone 30 at regular intervals.
2d) The caller, the station, the main device 20 and the key telephone 30 are in a “calling state”.
[0021]
(3) In the above (1) or (2), that is, the case where the main device 20 disconnects the call state from the key telephone 30 at the time of a power failure or energization will be described with reference to FIG.
3a) The key telephone 30 notifies the station of “disconnection request”.
3b) Upon receiving the “disconnection request”, the station notifies the caller of “disconnection notification” and notifies the key telephone 30 of “release request”.
3c) Upon receiving the “disconnection notification”, the caller notifies the station of the “opening completion notification”.
3d) The key telephone 30 notifies the station of “opening completion notification”.
3e) The main device 20 requests the key telephone 30 for an “activation request”.
3f) The key telephone 30 receives the “activation request” from the activation request receiving means 37, is activated by the activation means 38, further notifies the main apparatus 20 of “activation”, and makes a call. The person, the station, the main device 20 and the key telephone 30 are in a “call waiting state”.
[0022]
As described above, according to the present embodiment, since the call resumption request means 35 is provided, when the main device 20 notifies the station of interruption at the time of a power failure, the call on the ISDN outside line is simply interrupted. The call can be held as it is. At that time, if the station state confirmation means 36 and the energization detection means 37 are provided, the interruption state of the station can be detected. Further, even if power is restored during an ISDN external line call during a power outage, the activation means 39 that activates in response to an activation request from the main device 20 is provided, so that the call is maintained as it is. Can do.
[0023]
【The invention's effect】
According to the present invention, when the main unit notifies the station of interruption at the time of a power failure, the call can be kept as it is by simply interrupting the call on the ISDN external line, and the ISDN external line in a power failure state can be maintained. It is possible to obtain a key telephone with a power failure function that can hold a call as it is even if power is restored during the call.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a button telephone according to an embodiment.
FIG. 2 is an operation explanatory diagram of the key telephone according to the embodiment during a call.
FIG. 3 is an explanatory diagram of an example of a system in which the button telephone with a power failure function according to the embodiment is used.
FIG. 4 is an explanatory diagram of a conventional button telephone.
[Explanation of symbols]
11 main device 12 personal computer 121 personal computer adapter 13 standard telephone 14 telephone with answering function and power outage function 15 digital cordless telephone cordless handset 151 digital cordless phone connection device 16 answering telephone with color LCD display 161 video line 162 TV adapter 163 color camera door phone 17 FAX device 171 telephone adapter 18 bus,
20 main unit,
30 Button telephone with power failure function,
31 CPU
32 Main device interface 33 Telephone unit 34 ISDN interface 35 Call resumption request means 36 Station state confirmation means 37 Energization detection means 38 Activation request reception means 39 Activation means

Claims (4)

In a key telephone with a power failure function that is connected to a main apparatus that connects multiple ISDN lines, and that includes a CPU, main apparatus interface, telephone unit, etc.
An energization detecting means for detecting energization of the main unit, a station state confirming unit for confirming a call state of the station, and a state in which the station state confirming unit confirms the call state of the station at the time of a power failure of the main unit and is suspended from the station A key telephone with a power failure function, comprising: a call resumption requesting means for requesting a station to resume a call when a notification is received . In the key telephone with a power failure function according to claim 1,
A button telephone with a power failure function, comprising activation request receiving means for receiving an activation request from a main device . In the key telephone with a power failure function according to claim 1 or 2,
A button telephone with a power failure function, characterized by comprising activation means for activation in response to an activation request from a main device . In the button telephone with a power failure function according to any one of claims 1 to 3,
A key telephone with a power failure function characterized by having an answering machine function .

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