JPH08182051A - Radio telephone system - Google Patents

Abstract

PURPOSE: To provide a radio telephone system in which a call is received by using another radio telephone terminal even when a radio channel setup is disabled for a certain radio telephone terminal or the terminal cannot receive the call due to some other cause. CONSTITUTION: A master set 101 on the occasion of the arrival of a call and a radio base station 109 on the occurrence of radio channel setup detect enable/ disable state of line setup and enable/disable state of call reception by a radio telephone terminal 110. As a result, when the call reception is disabled, the system allows a radio telephone terminal other than the radio telephone terminal 110 to receive the incoming call.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio telephone system such as a button telephone device which accommodates a radio telephone device in an extension line.

[0002]

2. Description of the Related Art Extension terminals in conventional button telephones are mainly connected by wire as shown in FIG. In FIG. 15, the main device 101
Is an office line interface 10 that accommodates a telephone line 102.
3, the communication path 106, the control unit 107, and the storage area unit 1
08 and an extension telephone interface 105,
The extension-only telephone interface 105 includes an extension 104
The telephone device 111 is connected via.

However, in recent years, the spread of wireless telephone devices has led to the introduction of wireless button telephone devices in which the extension terminals are made wireless, even in button telephone devices.

By the way, in a wired system, unlike a wireless system, a call channel and a control channel are separated on one physical line. Therefore, the state of an extension terminal in a wired system is changed from that of an extension terminal. Each time, it was transmitted to the main device using the control channel.

By such processing, the main device is always
The state of extension terminals can be grasped.

This is to judge whether or not the extension terminal at the time of execution can fulfill the service, for example, when the service which internally repeats automatic transmission is executed by registering various services from the corresponding extension terminal. Has the advantage that it can be done instantly.

At the same time, this also has the advantage that unnecessary lighting display can be avoided in capturing unnecessary line resources and displaying LED information or the like indicating the use status of the line.

On the other hand, in order to know the state of the extension terminal (registration of local data, etc.) from the main unit in the wireless button telephone device, communication is once established on the control channel on the wireless line, and then the call channel is switched to. Then, there is a method of transmitting various control data and the like in the system through a communication channel.

However, since only the transfer of various control information in this system requires establishment of a wireless line unrelated to a call and a call setting, it is "radiation of unnecessary radio waves" under the law. prohibited. The same applies when the state of the main device (for example, an incoming call to an outside line) is confirmed from the extension terminal.

[0010]

However, in the radio button telephone apparatus in the above-mentioned conventional example, the success or failure of establishment of the radio line and the state of the extension terminal cannot be always grasped, and therefore the operability and response similar to those of the wired system are provided. In order to realize the above, it is necessary to handle the state of the wireless line and the state of the extension terminal to some extent as an assumed process.

For this reason, in an outside call receiving service such as DIL (Direct In Line) in which an extension terminal is designated,
Since the incoming call information is transmitted to the wireless telephone terminal, it is necessary to establish the wireless line once. At this time, if the wireless line cannot be established for some reason, or if the extension terminal is in a state where it cannot receive service (for example, during local setting), an important incoming call to the outside line is invalidated and the user side Has the disadvantage of falling into an unfavorable situation.

[0012] The present invention provides a radiotelephone system capable of receiving an incoming call at another radiotelephone terminal even if the radio line cannot be established or the call cannot be received for some reason. With the goal.

[0013]

According to the present invention, a radio base station requests a radio telephone terminal to establish a radio line, a detection means for detecting an abnormality of the radio telephone terminal and the radio line, and this detection. And a notification means for notifying the result to the exchange device, and the exchange device is provided with a receiving means for receiving an incoming call to the extension terminal according to the notified result of the detection.

Further, the radiotelephone terminal receives the incoming call request from the exchange device, determines means for determining whether the incoming call request can be received, and sends the result of the determination to the exchange device. And a switching device,
It comprises an analyzing means for analyzing the result of the incoming call request received from the wireless telephone terminal, and an incoming call means for receiving an incoming call to the extension terminal according to the analysis result of the analyzing means.

In the above configuration, when the main unit receives an incoming call and the wireless base station establishes a wireless line, it detects whether the wireless telephone terminal can establish a line and whether the incoming call is possible or not. As a result, the incoming call is unsuccessful. If possible, a call is made to a radio telephone terminal other than the above radio telephone terminals capable of receiving a call.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the system configuration of a key telephone device according to an embodiment of the present invention.

The main unit 101 of the key telephone apparatus is a station line interface 103 for accommodating a telephone line 102 such as a general subscriber line / private branch exchange in the main apparatus 101, and an extension-only telephone for accommodating an extension 104 of the key telephone apparatus. Call path 1 for switching connection between interface 105 and line
06, and a control unit 107 that controls the entire main device 101.
And a storage area unit 108 for storing various data. The radio base stations 109a and 109b are connected to the extension 104 of the key telephone device, and the radio base station 1
09a and b are wireless telephone terminals 110 via a wireless line.
a and b are connected.

In the following description, the radio base station 1
09a, b and the radio telephone terminals 110a, 110b will be described as the radio base station 109 and the radio telephone terminal 110.

FIG. 2 is a block diagram showing the configuration of the radio base station 109.

The radio base station 109 has a line interface unit 201 for accommodating the extension 104 of the key telephone unit.
An audio processing circuit 202 for separating and multiplexing a control signal and an audio signal, a wireless circuit section 203 for converting a wired signal and a wireless signal, and a control section 2 for controlling the base station 109.
04, a modem 205 that performs modulation and demodulation of control signals, a ROM 206 that stores various programs, a RAM 207 that stores various control information, and an antenna 208 that transmits and receives wireless signals.

FIG. 3 is a block diagram showing the configuration of the radio telephone terminal 110.

This radio telephone terminal 110 has a receiving section 301 and a transmitting section 302 for making a call, an audio processing circuit 303 for separating and multiplexing a control signal and an audio signal, and converting a wired signal and a wireless signal. A wireless circuit unit 304 that performs
A control unit 305 that controls the radio telephone terminal 110, a modem 306 that modulates and demodulates control signals, a ROM 307 that stores various programs, an antenna 308 that transmits and receives radio signals, and a speaker button 30 that is used to start a call.
9, a liquid crystal display unit 310, an outside line LED (LED) 311 for displaying the state of the telephone line 102, and a function key 31 used when using various functions peculiar to the button telephone device.
2, a dial information input unit 313, a RAM 314 that stores various control information, a speaker 315 and a microphone 316 for making a voice call, and a speaker button 309.
And a speaker LED 317 for displaying the pressed state of the.

4 and 5 are flow charts showing the operation of the main unit 101 in the first embodiment of the present invention.

FIG. 6 is a flow chart showing the operation of the radio base station 109 in the first embodiment, and FIG.
FIG. 8 is a flowchart showing the operation of the wireless telephone terminal 110 in the first embodiment.

Further, FIGS. 9, 12 and 13 are sequence charts showing the exchange between the main unit 101, the radio base station 109 and the radio telephone terminal 110 in the first embodiment.

Next, a first embodiment of the present invention having the above-mentioned structure will be described with reference to FIGS. 1 to 9, 12 and 13.

First, an external line incoming from the telephone line 102 (M
The main apparatus 101 that has detected 901) (S401) checks whether it is an extension-specified incoming call (S402). Then, in the case of the designated incoming call (S402: YES) (here, the wireless telephone terminal C), a line connection request (M902) is transmitted to the wireless base station 109 (S403).

Upon receiving the line connection request (M902) (S601), the radio base station 109 checks the use (vacancy) of the radio communication channel (S602), and if there is a usable communication channel (S602: YES). ), The channel to be used is stored in the RAM 207 (S603), and the line connection request signal (M903) is transmitted to the wireless telephone terminal 110 on the wireless control channel (S604). Further, the radio base station 109 activates a response timer (S60).
5).

Thereafter, the radio base station 109 confirms the reception of the response message from the radio telephone terminal 110 (S6).
06). At this time, if the timer expires (S60
7), line connection to main device 101 failed (M904)
Is transmitted (S608).

Main device 101 that received the message
Checks the wireless line connection state (S404), and if the connection fails (S404: NO), analyzes the extension terminal capable of receiving an outside line (S405), and the wireless telephone terminal 110 which is the extension capable of receiving the call A line connection request (M905, M906) is transmitted to the connected wireless base station 109 (here, wireless telephone terminals A and B) (S407, S40).
8).

For convenience of explanation, the process for an arbitrary extension (radio telephone terminal A) will be described here.

Upon receiving the line connection request (M905) (S601), the radio base station 109 checks the use (vacancy) of the radio communication channel (S602), and if there is a usable communication channel (S602: YES). ), The channel to be used is stored in the RAM 207 (S603), and the connection request signal (M1201) is transmitted to the wireless telephone terminal 110 on the wireless control channel (S604).

The radio base station 109 also activates a response timer (S605). Upon receiving the connection request signal (M1201) (S701), the radio telephone terminal 110 checks whether or not the connection of the radio line is possible (S702), and if it is impossible (S702: NO), the radio telephone terminal 110.
Transmits a line connection refusal signal to the wireless base station 109 (S703) and transitions to the idle state.

If the line can be established, a connection confirmation signal (M1202) is transmitted to the radio base station 109 (S704).

The radio base station 109 receives the connection confirmation signal (M1
202) to confirm establishment of a wireless line (S60)
6) When the connection of the wireless line is confirmed (S606: Y
ES), the use of the stored reserved channel is confirmed again (S610), and when the reserved channel cannot be used (S610: NO),
A line connection failure signal is transmitted to the wireless telephone terminal 110 (S608), and the state transits to the idle state.

On the other hand, if usable (S610: YE
S), the frequency used is switched from the radio control channel to the radio communication channel, and a channel movement request signal (M1203) is transmitted to the radio telephone terminal 110 (S611).
After that, signals are transmitted and received on the call channel.

Upon receiving the signal (S705), the radiotelephone terminal 110 confirms the shift to the call channel (S70).
6) The channel movement confirmation signal (M1204) is transmitted to the radio base station 109 (S707).

Upon receiving the signal (S612), the radio base station 109 confirms the line connection (SM) to the main unit 101.
1205) is transmitted (S613), and thereafter the state transits to the talking state.

Incidentally, the above S401 to S408, S601
In steps S613 and S701 to S707, there is no particular distinction between the radio base stations 109A and B and the radio telephone terminals 110A and B, and the same processing is executed for a radio system capable of receiving an incoming call. Therefore, M906, M120
Each message of 8 to M1212 is the M90 described above.
5, one-to-one correspondence with the messages of M1201 to M1205.

Subsequently, the line connection confirmation (M120
5) is received (S409), the main apparatus 101 refers to the setting data unique to the outside line and the extension set in the storage area unit 108, and according to the setting of whether the response is possible or not, ringing or non-ringing, Make an incoming call.

For the sake of explanation, the wireless telephone device 110 is described here.
It is assumed that A is the non-ringing designation and the wireless telephone device 110B is the ringing designation.

In the control unit 107, the storage area unit 108 described above is used.
The setting data corresponding to the wireless telephone terminal 110A therein is checked (S410). Then, in the case of non-ringing, the wireless base station 1
Outgoing line incoming (including each of the outside line LED state and non-ringing designation) (M1206) is transmitted to 09A (S41).
2).

When the ringing is possible, an outside line incoming including ringing designation (including each of the outside line LED state and ringing designation)
(M1213) is transmitted to the radio base station 109B (S41
1), transition to the response waiting state (S501).

The radio base station 109A which has received the outside line incoming (M1206) transmits an outside line incoming signal (M1207) to the radio telephone terminal 110A.

Further, the radio base station 109B which has received the outside line incoming (M1213) transmits the outside line incoming signal (M1214) to the radio telephone terminal 110B.

Outside line incoming signal (M1207, M1214)
Wireless telephone terminal 110 that has received each of the (S708)
A and 110B are external line LEDs 3 according to internal parameters.
11 is controlled (S709). Further, the internal parameters are analyzed (S710), and if the ringing is designated, the speaker 3
An external line ring tone is output by 15 (S711).

If the wireless line connection is successful (S
404: YES), an external line incoming call (including the designated incoming call information) is transmitted to the wireless base station C to which the designated extension terminal (here, the wireless telephone C) is connected (S406), and a transition is made to the response waiting state (S501). ).

On the other hand, if the call cannot be received by specifying the extension (S40
2: NO), and the process proceeds to S405 and subsequent steps.

When the wireless line connection is successful (S
404: YES), the external line incoming call (including the designated incoming call information) is transmitted to the wireless base station C to which the designated extension terminal (here, the wireless telephone C) is connected (S406).

Next, the response to the above-mentioned incoming call from the outside line will be described.

First, when the key press is detected in the radio telephone terminal 110 (S801: YES), the pressed key is analyzed (S802). Here, when the pressed key is the outside line button (S807: YES) and it is not the outside line button during incoming call (S811: NO), the outside line button n in the outside line LED 311 corresponding to the outside line button n.
The external line LED corresponding to is transmitted and blinks (for example, green color is 0.
(5 seconds cycle) (S812).

Next, the speaker LED 317 is turned on (S813), and the voice circuit 30 inside the radio telephone terminal 110 is turned on.
3 is connected to the speaker 315 and the microphone 316, and the volume is adjusted (S814).

When the pressed key is the outside line button for incoming call (S811: YES), the above S812 and S81 are performed.
Process 3 is performed.

If the call request is not the outside line button n (S807: NO), it is checked whether the call request is off-hook (S808).

Further, if the outgoing call request is off-hook (S
808: YES), the speaker LED 317 is turned off (S809), and the voice circuit 30 inside the wireless telephone terminal 110 is turned on.
3 is connected to the receiving unit 301 and the transmitting unit 302 to adjust the volume (S810).

When the call request is made by pressing the speaker button (S808: NO), the processes of S813 and S814 are performed as in the case of pressing the outside line button n. After the above processing is completed, the display on the liquid crystal display unit 310 is cleared (S81).
5).

Subsequently, the radio telephone terminal 110 checks the pressed external line button, and if it is not the incoming external line button (S816: NO), transmits a normal external line transmission signal to the wireless base station 109 (S818). ). If it is an outside line button that is receiving an incoming call (S816: YES), a key press (outside line button n) signal (M
1301) is transmitted (S817).

Upon receiving the key press signal (M1301), the radio base station 109 transmits a key press (M1302) to the main unit 101.

The main unit 101 receives the key press,
When a response is detected (S1201), the responding base station is analyzed for all the wireless telephone terminals 110 accommodated in the extension (S502), and the corresponding wireless telephone terminal 110 is the responding wireless telephone terminal 110. (S502: YES),
The outside line LED status (M130
3) is transmitted (S503), and then a voice connection request (M13
05) is transmitted (S504). Further, the office line interface 103 and the extension-only telephone interface 105 are connected via the communication path 106 (S505).

The radio base station 109 which has received the outside LED status (M1303) and the voice connection request (M1305).
Transmits an outside line LED status signal (M1304) and a voice connection request signal (M1306) to the wireless telephone terminal 110.

Upon receiving the outside line LED status signal (M1304) (S819), the radio telephone terminal 110 controls the LED of the outside line LED 311. When the voice connection request signal (M1306) is received (S820), the voice processing circuit 303 inside the radio telephone terminal 110 connects the radio circuit unit 304 to the speaker 315 and the microphone 316 (S821). At this time, the wireless telephone terminal 110 and the wireless base station 109 are in a talking state on the wireless line (M130
8), and a call state (M1307) is established between the wireless base station 109 and the main apparatus 101 on a wired line.

On the other hand, the responding base station is analyzed (S50
2) If the corresponding radio telephone terminal 110 is the radio telephone terminal 110 that has responded (S502: NO), the external line termination cancellation (M1309) is transmitted to the radio base station 109 (S506), and the time (M1311). Is sent (S50
7), idle display (M1313) is transmitted (S50
8), send a line disconnect request (M1315) (S50)
9).

The above M1309, M1311, M131
The radio base station 109 having received M3 and M1315 sends an external line termination cancellation signal (M131
0), a time signal (M1312), an idle display (M1314), and a line disconnection request (M1).
316) is transmitted.

The main device 101 uses the steps S506 to S509 described above.
Is processed for all extension lines receiving an outside line (S51).
0).

The M1310, M1312 and M131
The radio telephone terminal 110 having received M4 and M1316 receives the outside line incoming call termination signal (M1310) (S80).
2) Control the corresponding LED of the outside line LED 311 (for example, red constant light). When the time signal (M1312) is received (S803), the clock data in the RAM 314 is updated, and when the idle display signal (M1314) is received (S804), the date and time is displayed on the liquid crystal display unit 310. Further, when the line disconnection request signal (M1316) is received (S805), the line disconnection confirmation signal (M1317) is transmitted to the radio base station 109 (S806), and the radio circuit unit 30
Close 4

Upon receiving the line disconnection confirmation signal (M1317), the radio base station 109 transmits a line disconnection confirmation (M1318) to the main unit 101. Confirm disconnection (M131
Upon receiving 8) (S511), the main apparatus 101 ends the call termination process and transitions to the idle state.

The main device 101 performs the processing of S511 on all extension lines that are receiving an outside line (S512).

Next, a second embodiment of the present invention will be described.

FIG. 10 is a sequence chart showing an exchange between the main unit 101, the radio base station 109 and the radio telephone terminal 110 in the second embodiment.

The second embodiment will be described below with reference to FIGS. 1 to 4, 6 and 10.

External line incoming from the telephone line 102 (M90
The main apparatus 101 that has detected 1) (M401) checks whether it is an extension-specified incoming call (S402). In the case of a designated incoming call (S402: YES, here, the wireless telephone terminal C), the line connection request (M1001) is issued to the wireless base station 109.
Send to.

Upon receiving the line connection request (M1001) (S601), the radio base station 109 checks the use (vacancy) of the radio communication channel (S602), and if there is a usable communication channel (S602: YES). ), The channel to be used is stored in the RAM 207 (S603),
A line connection request signal (M100
2) is transmitted to the wireless telephone terminal 110 (S604).

The radio base station 109 also activates a response timer (S605). After that, the wireless base station 109
The reception of the response message from the wireless telephone terminal 110 is confirmed (S606). At this time, before the expiration of the timer,
The line connection refusal signal (M100
3) is received (S607: NO), the main device 101
A line connection refusal (M1004) is transmitted to (S6).
09).

Main device 101 that received the message
Checks the wireless line connection state (S404), and if the connection fails (S404: NO), analyzes the extension terminal capable of receiving an outside line (S405), and the wireless telephone terminal 110 which is the extension capable of receiving the call A line connection request (M905, M906) is transmitted to the connected wireless base station 109 (here, wireless telephone terminals A and B) (S407, S40).
8).

Subsequent main device 101, radio base station 109,
The operation and processing in the wireless telephone terminal 110 are the same as those in the first embodiment.

Next, a third embodiment of the present invention will be described.

FIG. 11 is a sequence chart showing an exchange between the main unit 101, the radio base station 109 and the radio telephone terminal 110 in the third embodiment. Further, FIG. 14 is a flowchart showing the operation of the main device 101 in the third embodiment.

Hereinafter, FIG. 1 to FIG. 4, FIG. 6 to FIG.
A third embodiment will be described with reference to FIG.

External line incoming from the telephone line 102 (M90
The main device 101 that has detected 1) (S401) checks whether it is an extension-specified incoming call (S402). Then, in the case of a designated incoming call (S402: YES, here, the wireless telephone terminal C is assumed), a line connection request (M1101) is transmitted to the wireless base station 109.

Upon receiving the line connection request (M1101) (S601), the radio base station 109 checks the use (vacancy) of the radio communication channel (S602), and if there is a usable communication channel (S602: YES). ), The channel to be used is stored in the RAM 207 (S603),
On the wireless control channel, a line connection request signal (M110
2) is transmitted to the wireless telephone terminal 110 (S604).

The radio base station 109 also activates a response timer (S605). Upon receiving the connection request signal (M1102) (S701), the wireless telephone terminal 110 checks whether or not the wireless line connection is possible (S702), and if not possible (S702: NO), the wireless telephone terminal 110 uses the wireless connection. A line connection refusal signal is transmitted to the base station 109 (S7
03) and transition to the idle state.

If the line can be established, a connection confirmation signal (M1103) is transmitted to the radio base station 109 (S704).

The radio base station 109 receives the connection confirmation signal (M1
103) and confirms the establishment of the wireless line (S60).
6) When the connection of the wireless line is confirmed (S606: Y
ES), the use of the stored reserved channel is confirmed again (S610), and when the reserved channel cannot be used (S610: NO),
A line connection failure signal is transmitted to the wireless telephone terminal 110 (S608), and the state transits to the idle state.

On the other hand, if usable (S610: YE
S), the frequency used is switched from the radio control channel to the radio communication channel, and a channel movement request signal (M1104) is transmitted to the radio telephone terminal 110 (S611).
After that, signals are transmitted and received on the call channel.

Upon receiving the signal (S705), the radiotelephone terminal 110 confirms the shift to the call channel (S70).
6) The channel movement confirmation signal (M1105) is transmitted to the radio base station 109 (S707).

Upon receiving the signal (S612), the radio base station 109 confirms the line connection (M1
106) is transmitted (S613), and thereafter, the state transits to the talking state.

Main device 101 that received the message
Confirms the wireless line connection state (S404), and if the connection is successful (S404: YES), the incoming call to the outside line, to the wireless base station 109 to which the wireless telephone terminal 110, which is the extension capable of receiving the call, is connected ( Here, the wireless base station C), an external line incoming (including the external line LED blinking information, to the designated internal line) (M1
107) is transmitted (S406).

The radio base station 109 which has received the outside line incoming call
Calls the wireless telephone terminal 110 to receive an outside line incoming signal (M1108).
Send

Upon receiving the signal (S708), the radiotelephone terminal 110 confirms whether or not an outside line call can be received (S709). Then, if an incoming call is possible (S709:
If YES, the ring tone is output according to the designation of ringing (S711) (S712). Also, if the incoming call cannot be answered in the local mode (for example, during data setting) (S709: N
O) is an incoming call rejection signal (M110) to the wireless base station.
9) is transmitted (S713). Upon receiving the signal, the wireless base station 109 rejects the incoming call (M1
110) is transmitted.

When the main unit 101 waiting for a response (S1401) receives a response from the wireless base station 109 (S1401: YES), it analyzes the response and determines whether the wireless telephone terminal 110 can receive the incoming call. Check whether or not (S14)
02). When the call cannot be received (S1402: N
O), similarly to the first embodiment, the processing after S405 (the line connection request (M905, M906) is transmitted to the wireless telephone terminal 110 capable of receiving an incoming call) is performed.

Subsequent main device 101, radio base station 109,
The operation and processing in the wireless telephone terminal 110 are the same as those in the first embodiment.

Subsequently, an outside line incoming call stop (M1111) is transmitted (S1406) and a time (M1113) is transmitted (S1407) to the radio base station 109 to which the radio telephone terminal 110 which has returned the call rejection is connected. The idle display (M1115) is transmitted (S1408), and the line disconnection request (M1117) is transmitted (S1409).

The above M1111, M1113 and M111
The radio base station 109 having received M.5 and M1117 sends to the radio telephone terminal 110 an external call termination cancellation signal (M111).
2), a time signal (M1114), an idle display (M1116), and a line disconnection request (M1).
118) is transmitted.

The above M1112, M1114 and M111
The radio telephone terminal 110 which has received M.6 and M1118 receives the outside line incoming call termination signal (M1112) (S80).
2) Control the corresponding LED of the outside line LED 311 (for example, a red constant light). When the time signal (M1114) is received (S803), the clock data in the RAM 314 is updated, and when the idle display signal (M1116) is received (S804), the date and time is displayed on the liquid crystal display unit 310.

When a line disconnection request signal (M1118) is received (S805), a line disconnection confirmation signal (M111).
9) is transmitted to the wireless base station 109 (S806), and the wireless circuit unit 304 is closed. Line disconnection confirmation signal (M11
Upon receiving 19), the wireless base station 109 transmits a line disconnection confirmation (M1120) to the main device 101. Main device 101 which has received the line disconnection confirmation (M1120) (S1410)
Completes the call ending process for the wireless telephone terminal 110 that has returned the call rejection (M1110), and transits to the idle state.

On the other hand, when a response indicating that the incoming call is possible is received from the wireless telephone terminal 110 (S1402: YE
S), the main apparatus 101 transmits the outside line LED status to the wireless base station 109 (S1403), and then transmits a voice connection request (S1404). Further, the office line interface 103 and the extension-specific telephone interface 105 are connected via the communication path 106 (S1405).

Upon receiving the outside line LED status and voice connection request, the radio base station 109 transmits an outside line LED status signal and voice connection request signal to the radio telephone terminal 110.

Upon receiving the outside line LED status signal, the radio telephone terminal 110 controls the LED of the outside line LED 311. When the voice connection request signal is received, the voice processing circuit 303 inside the radio telephone terminal 110 connects the radio circuit unit 304 to the speaker 315 and the microphone 316. At this time, the wireless telephone terminal 110 and the wireless base station 109 are in a call state on the wireless line, and the wireless base station 109
A call is established between the main device 101 and the main device 101 over a wired line.

Although the above-mentioned first to third embodiments have been described with reference to an incoming call with an outside line (extension line) as an example, these are services for an extension line system and other incoming call systems provided by a key telephone device. The same is done in.

[0100]

As described above, according to the present invention,
In an outside call receiving service such as a DIL (Direct In Line) that specifies an incoming extension terminal, if a wireless line with the designated extension terminal cannot be established or cannot receive a call, another extension within the same system By making the terminal receive an outside line according to the ringing designation in advance in the data setting, it is possible to make a response by receiving an outside line without invalidating the incoming call from the outside line, and it is possible to secure the call.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a configuration of a radio base station in the above embodiment.

FIG. 3 is a block diagram showing a configuration of a wireless telephone terminal in the above embodiment.

FIG. 4 is a flowchart showing the operation of the main device in the first embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the main device in the first embodiment.

FIG. 6 is a flowchart showing an operation of the wireless base station in the first embodiment.

FIG. 7 is a flowchart showing an operation of the wireless telephone terminal in the first embodiment.

FIG. 8 is a flowchart showing an operation of the wireless telephone terminal in the first embodiment.

FIG. 9 is a sequence chart showing an exchange between the main device, the radio base station and the radio telephone terminal in the first embodiment.

FIG. 10 is a sequence chart showing an exchange between the main device, the radio base station and the radio telephone terminal in the second embodiment of the present invention.

FIG. 11 is a sequence chart showing an exchange between the main device, the radio base station and the radio telephone terminal in the third embodiment of the present invention.

FIG. 12 is a sequence chart showing an exchange between the main device, the radio base station and the radio telephone terminal in the first to third embodiments.

FIG. 13 is a sequence chart showing an exchange between the main device, the radio base station and the radio telephone terminal in the first to third embodiments.

FIG. 14 is a flowchart showing the operation of the main device in the third embodiment.

FIG. 15 is a block diagram showing a system configuration example of a conventional key telephone device.

[Explanation of symbols]

 101 ... Main device, 102 ... Telephone line, 103 ... Station line interface, 104 ... Extension, 105 ... Extension dedicated telephone interface, 106 ... Call path, 107 ... Control section, 108 ... Storage area section, 109a, 109b ... Radio base station , 110a, 110b ... Wireless telephone terminals.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location H04Q 7/34 H04Q 7/04 B

Claims (3)

[Claims] 1. A radiotelephone system comprising a radiotelephone base station connected to a radiotelephone terminal by a radio line, and a switching device accommodating the radiotelephone base, wherein the radiotelephone base station is a radiotelephone. Requesting means for requesting establishment of a wireless line to the terminal, detecting means for detecting an abnormality of the wireless telephone terminal and wireless line, and notifying means for notifying a switching device of the result of this detection, the switching device, A radiotelephone system comprising: an incoming call means for receiving an incoming call to an extension terminal according to the notified detection result. 2. The radio telephone system according to claim 1, wherein the radio base station is a main device of a button telephone device. 3. A radiotelephone system comprising a radiotelephone device including a radiotelephone terminal and a radio base station connected by a radio line, and a switching device accommodating the radio base station. The telephone terminal has a receiving means for receiving an incoming call request from the exchange device, a determining means for determining whether or not the incoming call request can be received, and a transmitting means for transmitting the result of the determination to the exchange device. The exchange apparatus includes an analyzing unit that analyzes the result of the incoming call request received from the wireless telephone terminal, and an incoming call unit that receives an extension terminal according to the analysis result of the analyzing unit. Wireless telephone system.