JP3092332B2 - Wireless terminal controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main unit of a key telephone or a standard telephone, which is connected to an extension or a public line of an exchange, and further relays terminal device control data and voice signals to a wireless terminal by wireless communication. The present invention relates to a wireless terminal control device which transmits and can provide various services provided by an office line or an exchange to the wireless terminal.

[0002]

2. Description of the Related Art In recent years, various types of wireless terminal control devices which can be connected to an internal line of an exchange or a public line have been developed.

Each of these conventional wireless terminal control devices is provided with an exchange which can be a key telephone main unit or a standard telephone main unit, or two types of interfaces for connection to a public line.

[0004] One of the interfaces is a line current supply means for supplying current to a line using two metal conductors as signal lines, and a handset lift (off / off).
DC detection means for judging the start / end of a call by conducting / interrupting the DC current of the line due to on-hook) and a bell signal for transmitting an incoming call by superimposing an AC signal of several tens of volts to the line. Dial signal receiving means for receiving a multi-frequency tone signal (hereinafter referred to as "DTMF signal") from a transmitting means or a terminal or a DC intermittent signal of 10 to 20 pulses per second as a dial signal for selecting a communication partner station; A telephone call circuit of a wireless terminal so that it can be connected to a quasi-telephone interface circuit of an internal line of a switchboard or a general public line having a telephone call transmission means for transmitting a telephone call signal by modulating a DC current flowing through the line. The on / off operation of the button is received by the wireless terminal communication means and converted into a direct current conduction / cutoff operation of the line. Hook signal sending means for receiving a dial input signal of the wireless terminal through a wireless terminal communication means and converting the dial input signal into a dial signal by a DTMF signal or a pulse signal; Bell signal detection means for detecting a bell signal on the line to notify the wireless terminal via the wireless terminal communication means, and a call signal on the line after the exchange or public network has made a connection to the wireless terminal. Is a standard telephone interface equipped with a telephone call transmission means for transmitting data via a wireless terminal communication means.

Further, another interface is provided with a communication voice transmission means for transmitting voice communication to two metal conductors, and is called a metal conductor of the standard telephone interface (hereinafter referred to as a first signal line). Are different from each other with two conductors (hereinafter referred to as "second signal line"), information on handset lifting / lowering, dial information, bell incoming call information, display information on a display panel or a lamp, and other various functions provided in the terminal. A set of the first signal lines and a set of the second signal lines are connected so as to be connectable to a dedicated key telephone interface circuit having dedicated key telephone control communication means for transmitting button operation status information and the like. The first signal line is connected to both signal lines to transmit a speech voice signal to the wireless terminal via the wireless terminal communication means.
A call voice signal transmission means for performing a call voice interface with the signal line of
An exclusive key telephone interface including an exchange communication means for communicating control data exchange with the exclusive key telephone control communication means of the exchange.

[0006] These two types of interfaces are:
In order to have different functional configurations as described above, they are provided as dedicated interface boards, and the construction contractor is required to connect the wireless terminal control device body to a public line or an extension of a switchboard, In the case of an extension of an exchange, it is determined whether the interface circuit is a standard telephone interface circuit or a dedicated button telephone interface circuit, and an interface board suitable for each application is installed at the time of installation work.

[0007]

However, in the above-described conventional configuration, it is necessary for an installer to check the type of exchange to be connected in advance and to select an interface, which requires a lot of man-hours in installation work. On the other hand, the manufacturer has to prepare each interface circuit in advance, and there is a problem that the system design and management become complicated.

[0008] An object of the present invention is to solve these conventional problems, to facilitate installation work, and to design a system.
An object of the present invention is to provide a wireless terminal control device that can be easily managed.

[0009]

In order to solve the above problems, the present invention provides a bell signal detecting means, a line current terminating means, a dial signal transmitting means for transmitting tone dial and pulse dial signals, and A standard telephone interface / button telephone audio signal interface having a telephone call audio signal transmission means and the like is connected to two first signal lines inside a modular jack for interfacing with the exchange main body, and a dedicated key telephone for the exchange main body. A dedicated button telephone control communication interface for exchanging control data peculiar to the key telephone such as key telephone control data and exchange control data to the dedicated key telephone control means of the interface circuit is provided on both sides of the first signal line of the modular jack. Connected to the second signal line located at Having a control unit for switching these interfaces.

[0010]

With the above arrangement, when the present apparatus is connected to the extension of the exchange via four telephone lines via the modular jack, the control unit 101 first controls the exchange between the exchanges using the dedicated key telephone control communication interface. A determination is made as to whether or not data communication is to be performed. If the communication has been performed, call transmission / reception / dial / hold / transfer / conference call / reception with the exchange body via the dedicated key telephone control communication interface. Dedicated button for abbreviated dialing, called name display, call time display, local line designation connection function, etc. Performs control data communication for various extension service control specific to telephone, and transmits voice signal on the standard telephone interface. This is performed by signal transmission means.

On the other hand, since the exchange does not have a dedicated key telephone interface or is connected to a public line, communication with the dedicated key telephone control communication interface is performed on the second signal line. If not established, various service control and voice signals by "hooking + special number" provided in the extension of a normal exchange, such as outgoing / incoming, dialing, holding, and forwarding, via the first signal line, using only the standard telephone interface. Perform transmission. Also, during the control interface with the exchange body using only the standard telephone interface, the dedicated key telephone control communication establishment / cancellation monitoring is always performed, and the operation mode is immediately shifted to either of the above operation modes.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a radio terminal control apparatus according to the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram of a radio terminal control apparatus according to the present invention. The wireless terminal control device 100 connects to the exchange via a modular jack 119 via an extension 102 composed of two sets of signal lines. Of the two sets of signal lines of the extension 102, the T-R 105 composed of the first set of signal lines connected inside the modular jack is used when the exchange has a standard telephone interface. It transmits a loop current for judging ON / OFF of a hook based on a change in current and transmits a voice band signal for a telephone call.

On the other hand, another pair of communication lines 103 connected to both sides of the T-R 105 connected to the modular jack 119 are connected to the exchange and the exchange of the wireless terminal controller 100 when the exchange has a key telephone interface. It performs a function of transmitting control data to and from the communication unit 104. The communication line 103 does not perform its function when the exchange connected by the extension 102 is a standard telephone interface.

An exchange communication unit 104 connected to the communication line 103 via the modular jack 119 includes a control unit 1
In the key telephone communication procedure, the communication control of 01 receives control data from the exchange and transmits control data to the exchange, and at the same time, recovers data errors during communication. In particular, when control data is received from the exchange, a reception interrupt is generated for the control unit 101, and software (exchange data reception processing 201 in FIG. 2) for receiving exchange data is started.

When the exchange has a standard telephone interface, the hook relay 108 connects (ON) / releases (OFF) a loop current for indicating an off-hook operation such as calling / answering / ending a call to the exchange. And, if said exchange is equipped with a key telephone interface, the connection / transmission of voice band signals to / from the exchange.
Acts as an opening. The capacitor 106 is a T-R 105
The DC current component between the signal and the bell detector 107 is cut off.

The bell detecting section 107 detects a bell signal transmitted from the exchange when the hook relay 108 is in the off state and the bell is received from the exchange, and notifies the control section 101 to that effect. The dial relay 109 is connected to the hook relay 108 described above.
And between the 2-wire 4-wire conversion unit 110 and the T-R10
5 for turning on / off the loop current and transmitting a dial pulse signal. This dial relay 1
Reference numeral 09 denotes a normal ON state, which is turned off by the number of times of dialing according to the dial information under the control of the control unit 101.

The two-wire / four-wire conversion unit 110 is a transformer.
Connect one end of the primary winding to dial relay 109,
Similarly, the other end of the primary winding is connected to hook relay 108. One of the two sets of secondary windings of the two-wire / four-wire conversion unit 110 is connected to the common contact c of the changeover switch 111 and the signal common ground. A voice band signal to be transmitted to R105 is input from wireless terminal communication section 115. On the other hand, another set of the secondary windings is the wireless terminal communication unit 1.
15 and connected to the signal common ground, and the T-
The voice band signal arriving from R105 is transmitted to the wireless terminal communication unit 1
Output to 15

The voice band signal input from one set of the secondary windings of the two-wire / four-wire converter 110 is attenuated so as not to be output from the other set of the secondary windings. The audio band signal input / output to / from the primary winding of the two-wire / four-wire converter 110 is transmitted to two sets of secondary windings separately for input and output. The changeover switch 111 is connected to the input of the secondary winding of the two-wire / four-wire conversion unit 110, the output of the DTMF signal transmission unit 112 connected to the contact a, and the wireless terminal communication connected to the contact b. The connection with the audio output of the unit 115 is switched. The DTMF signal transmitting section 112 performs a function of transmitting a multi-frequency selection signal (hereinafter, referred to as a “DTMF signal”) under dial signal transmission control of the control section 101.

The control unit 101 includes a DTMF signal transmission unit 11
When the DTMF signal is transmitted, control is performed so that the contact a and the contact c of the switch 111 are connected. The wireless terminal communication unit 115 performs transmission and reception of control data and recovery processing of a communication data error between the wireless terminal 117 and the control unit 101 via the antenna 116. A changeover switch 11 is connected to the input winding of the secondary winding of the two-wire / four-wire conversion unit 110.
1 to transmit the audio band signal received from the wireless terminal 117 via the contact b and the contact c of the first communication line.
The wireless terminal 117 is connected to the output winding of the secondary winding of No. 10 and transmits a voice band signal arriving from the T-R 105 to the wireless terminal 117.

In particular, when control data is received from the wireless terminal 117, a reception interrupt is generated for the control unit 101, and software (terminal data reception processing 205 in FIG. 2) for receiving control data is started. The control unit 101 performs communication control of the exchange communication unit 104 to transmit control data relating to incoming / outgoing / outgoing / dialing / display exchanged with the exchange and to transmit a bell incoming call detected by the bell detecting unit 107 to the wireless terminal. The communication unit 115 notifies the wireless terminal 117 of the transmission as the incoming call control data.

The control unit 101 includes a wireless terminal communication unit 115
In response to this, while performing selection control of a voice communication channel with the least interference in voice communication with the wireless terminal 117,
The wireless terminal 117 is instructed to select a channel. The dial mode switch 113 is a switch for inputting selection information as to whether the signal transmission mode of the dial signal to be transmitted on the T-R 105 is a pulse dial mode or a DTMF dial mode to the control unit 101 together with the pull-up resistor 114. . Hardware timer 118
Is built in the control unit 101 and periodically activates an interrupt for software (the timer process 209 in FIG. 2).

In accordance with the flow charts shown in FIGS. 2 and 3, the control unit 101 exchanges the communication unit 104, the bell detection unit 107, the hook relay 108, the dial relay 109, the changeover switch 110, and the DTMF transmission unit 11 described above.
2 and the wireless terminal communication unit 115.

FIG. 2 is a flowchart 201 showing a case where the exchange communication unit 104 receives data from the exchange via the communication line 103 and generates a reception interrupt to the control unit 101. Process ". Upon receiving the reception interrupt, control section 101 reads the received data from exchange communication section 104 (step 202).

Next, "reception" used in "timer processing" (flow chart 209) for monitoring whether or not communication is periodically performed between the exchange and the exchange communication unit 104 of the wireless terminal control apparatus 100 is performed. The flag is set (step 203). The setting of the “reception flag” means that communication has been performed with the exchange. afterwards,
The reception interrupt is terminated (step 204).

On the other hand, a flowchart 205 shows a “terminal data reception process” when the wireless terminal communication unit 115 receives control data from the wireless terminal 117 via the antenna 116.
Is shown. The control unit 101 includes a wireless terminal communication unit 115
Upon receiving a reception interrupt, the wireless terminal communication unit 115 reads the received data (step 206). After that, a series of processing (other processing: not directly related to the present invention; omitted in step 207) related to data reception of the wireless terminal 117 is performed, and the reception interruption processing is ended (step 208).

The processing shown in the flowchart 209 is as follows.
This is executed by the control unit 101 by the hardware timer 118 that operates at a longer cycle than the periodic reception interrupt timing of the “switch data reception processing” 201.

The purpose of this processing is to monitor whether data communication is periodically performed between the converter communication unit 104 and the exchange via the communication line 103, and to control the exchange via the extension 102. This is used to select the interface mode. When communication is interrupted for a certain period, the "communication flag" is cleared. When the communication is continued for a fixed period, the "communication flag" is set. Then, the mode changes to the “keyboard telephone interface mode”.

First, the control unit 101 determines whether or not communication is being performed with the exchange body by using a "communication flag" (step 210). Of the "reception flag" set in step 2 is confirmed (step 2).
11). If a reception interrupt has been generated once before the “timer processing” 209 is executed, the “reception flag” should be set. If no reception interrupt has occurred, the “reception flag” is set to “1”. It should have been reset. If it is set, the "reception flag" is cleared (step 212), and then the "interruption counter" for counting the number of times the communication is interrupted is cleared (step 213), and the communication is continued.

On the other hand, if the "reception flag" remains reset in step 211, it means that no exchange data reception interrupt has occurred between the previous timer interrupt and the present timer interrupt. And
It is determined that the communication has not been performed regularly between the exchange and the exchange communication unit 104, and the "interruption counter" is incremented by 1 (step 214).

Next, it is determined whether or not the "interruption counter" has counted up to the specified value (step 215). If the value has not reached the specified value, the timer interrupt processing is terminated (step 223) and the specified value is reached. If you have
The "communication flag" is cleared (step 21).
6) The interface mode with the exchange is set to the "standard telephone interface mode", and the timer interrupt processing is terminated.

If the "communication flag" has been cleared in the previous step 210 (if the interface mode with the exchange has already been "standard telephone interface mode"), then the status of the "reception flag" Is checked, and it is determined whether or not a reception interrupt from the exchange has occurred during the timer interrupt interval (step 217).
In order to continue the "standard telephone interface mode", the "restart counter" for counting the number of restarts of data communication with the exchange for a specified number of times is cleared.

On the other hand, if it is confirmed in step (217) that the "reception flag" has been set, the "reception flag" is cleared (step 219) to prepare for the next reception interruption monitoring. Next, 1 is added to the “resume counter” indicating the number of times of resumption of data communication (step 22).
0) Record that data communication was successful once.
If the number of counts of the “restart counter” is determined to be equal to or less than the specified number (step 221), the timer interrupt processing is terminated to continue the “standard telephone interface mode” (step 223). Step 2
If it is determined at 21 that the "resume counter" has reached the specified number of times, the "communication flag" is set to switch the interface mode with the exchange to the "button telephone interface mode" mainly for control data communication. Then (step 222), the timer processing 209 ends.

Next, a radio terminal control operation of the control unit 101 will be described with reference to a flowchart 301 of FIG.

The control unit 101 confirms the "communication flag" indicating the extension interface mode with the exchange set in the timer processing 209 (step 302).
In the case of the "standard telephone interface mode", it is determined in the terminal data reception processing 205 whether the data received from the wireless terminal 117 is off-hook data or on-hook data (step 303). Release R105 (Step 3
04) The extension 102 is put into a standby state.

Next, when the bell signal is detected on the T-R 105 by the bell detector 107 during the standby state (step 3).
05) The control data for calling the terminal is transmitted to the wireless terminal 117 (step 306). If the bell signal is not detected, the step 306 is jumped. Thereafter, the flow returns to step 302 described above to determine the interface mode with the exchange. On the other hand, if it is determined in step 303 that the data received from the wireless terminal 117 is off-hook data, the state of the wireless terminal 117 is either dialing or talking. The connection of the T-R 105 is performed (step 307).

Next, it is determined from the received data whether the wireless terminal 117 is in a dial transmission state (step 30).
8) If no data has been received, the process returns to the first step (step 302) to continue the current T-R105 connection state.
On the other hand, if the control data indicating that the wireless terminal communication unit 115 will make a dial call is received from the wireless terminal 117 (Step 308), the control unit 101 inquires about the setting state of the dial mode switch 113 (Step 309).
In the pulse dial mode, the data dial data is converted to pulse dial, and the dial relay is turned on / off.
The control is turned off, and a dial signal is transmitted to the T-R 105 as a loop current intermittent signal (step 310).

On the other hand, if it is determined in step 309 that the dial mode is the DTMF signal mode, the dial data
F signal, and the contact c of the changeover switch 111 is switched from the contact b side to the contact a side so that the DT
An MF signal is transmitted (step 311). Step 31
After the execution of step 0 and step 311, the process returns to the first step (step 302) to determine the interface mode.

When the control unit 101 determines in step (302) that the interface mode of the exchange is the "keyboard telephone interface mode" from the state of the "communication flag", the control unit 101 transmits the signal from the wireless terminal 117. It is determined from the received data whether the control data is off-hook or on-hook (step 312). If the control data is on-hook, the T-R 105 is released as a standby state (step 313). Next, the control unit 101 determines whether or not the on-hook data received from the wireless terminal 117 has already been transmitted to the exchange via the exchange communication unit 104 (step 314). 315) If it has already been sent, the step 315 is jumped.

Next, it is determined from the received data whether or not data for incoming call control has been received through the exchange communication unit 104 (step 316). (Step 317), and jump to step 317 if not received. Thereafter, it is determined from the received data whether or not there is data to be displayed on the display unit of the wireless terminal 117 (step 323). If there is display data, the wireless terminal 117 is determined.
Is transmitted (step 324), and if there is no data to be displayed, the process jumps to step 324.

Next, it is received from the wireless terminal 117 whether or not the wireless terminal communication unit 115 has received data indicating that a function key unique to a key telephone, such as a transfer / conference call / line selection on the operation panel, has been pressed. Judgment based on data (step 32
5) If it has been received, the data is exchanged by the exchange communication unit 10
4 (step 326), and if not received, step 326 is jumped. Thereafter, the process returns to the first step (step 302), and the interface mode is determined.

On the other hand, the control unit 101 executes the above-mentioned (step 3).
If it is determined in step 12) that the off-hook data has been received, the hook relay 108 is controlled to connect the T-R 105 (step 318). The T-R 105 connection operation is for answering a call or dialing. Next, it is determined whether or not the off-hook data has already been transmitted to the converter (step 319). If it has not been transmitted yet, data indicating that the terminal has gone off-hook is transmitted. Jump to step 320.

Next, the control unit 101 determines from the data received from the wireless terminal 117 whether or not data indicating a dialing operation has been received if the user is off-hook (step 321). If it has, the dial data is transmitted via the exchange communication unit 104 (step 322).
Jump 2 Hereinafter, step 323 described above is performed.
And control is performed to determine whether display data has been received.

Note that the wireless terminal control device 10 according to the present invention
Although the connection destination of the extension 102 of 0 has been described with the exchange having the standard telephone interface and the exchange having the key telephone interface, it is possible to connect to the public line network having the same line interface structure as the standard telephone interface.

[0045]

As described above, according to the present invention, both the standard telephone interface and the key telephone interface are provided in the extension interface part of the exchange, and the control unit determines the communication state of the exchange communication unit. Switch the interface mode.
When this unit is connected to an exchange having a dedicated extension for a key telephone set specially provided by a manufacturer, services such as conference call and office line selection can be provided by simple operation of function buttons on the wireless terminal. Line status display
Various services such as conference call / callee number or name / message display can be provided by the display unit of the wireless terminal.

On the other hand, when connected to a switchboard of another manufacturer or a public line network having an extension interface dedicated to a standard telephone, general connection such as hooking hold / extension transfer which can be realized by outgoing / incoming or T-R dial special numbers. The service provided by the exchange can be provided by the operation button of the wireless terminal.

The automatic identification function of the interface simplifies the work of the installer, and eliminates the need to replace the interface circuit of the present apparatus with the interface circuit of the switch body, thereby improving the versatility of the apparatus. Has an effect.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a wireless terminal control device according to an embodiment of the present invention.

FIG. 2 is a flowchart relating to a reception interrupt and a timer interrupt of a control unit 101 according to the present invention.

FIG. 3 is a flowchart of wireless terminal control of a control unit 101 according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 wireless terminal control device 101 control unit 102 extension 103 communication line 104 exchange communication unit 105 TR 106 capacitor 107 bell detection unit 108 hook relay 109 dial relay 110 2-wire 4-wire conversion unit 111 switch 112 DTMF transmission unit 113 dial mode Switch 114 Pull-up resistor 115 Wireless terminal communication unit 116 Antenna 117 Wireless terminal 118 Hardware timer 119 Modular jack

Claims (2)

(57) [Claims] 1. A DC loop closing means and a bell signal detecting means.
Dial signal sending means and voice for sending and receiving voice
An exchange equipped with signal transmission means and connectable to a standard telephone
Standard telephone interface means connected to an extension of a telephone and a key telephone having a data communication function.
Button telephone interface means having an exchange communication means connected to an extension of an exchange connectable as a device, and wireless terminal communication means for transmitting and receiving various control data and transmitting and receiving voice to and from a wireless terminal, When data communication between exchanges can not be established by the key telephone interface means, outgoing / incoming control is performed only by the standard telephone interface means, and when data communication with the exchange can be established by the key telephone interface means. Performs various control data transmission between the exchanges and data transmission of the special function button of the wireless terminal by the key telephone interface means, and transmits a voice signal to and from the exchange via the standard telephone interface means. Wireless terminal characterized by having a control unit Control device. 2. A DC loop closing means and a bell signal detecting means.
Pulse dial transmission means and DT for dial signal transmission
MF transmission means and voice signal transmission for voice transmission and reception
Means, and can be connected to an extension of an exchange to which a standard telephone can be connected.
Standard telephone interface means to be connected and exchange
Telephone with data communication function between mobile phone and terminal device
Connected to the extension of the exchange that can be connected as an extension terminal.
Button telephone interface with exchange communication means
Ace means, call, dial operation, ringtone transmission and each
Various controls for control with wireless terminals capable of displaying seed information
Wireless terminals that transmit and receive data and transmit and receive voice
Communication means, and the key telephone interface
If data communication between exchanges could not be established by
Departure and arrival only with the standard telephone interface means
Control the communication, and
If the data communication and the exchange in the stage could be established is
Between the exchanges by the button telephone interface means
Transmission / reception control, display data transmission and
And data transmission of the special function button of the wireless terminal.
For audio signals, the standard telephone interface
Control unit for transmitting data to and from the exchange via
A wireless terminal control device characterized by the following .