JPS6354834A - Radiotelephone system - Google Patents

Abstract

PURPOSE:To facilitate the connection with other remote mobile terminal equipment by providing an extension exclusive radio equipment to a master equipment so as to use the extension exclusive radio equipment even if the installed range of the mobile terminal equipment is spread. CONSTITUTION:When a mobile terminal equipment uses its selection means and to designate other mobile terminal equipment for the purpose of calling, the master equipment receiving a radio call signal uses a control means two apply radio connection between both the mobile terminal equipments while using two extension exclusive radio equipments. As a result, even if all of N-set of wired telephone lines are busy, that is, all of N-set of external line exclusive radio equipments 3-1...3-N are busy, extension exclusive radio equipments 5-1...5-2L are used to attain the talking among the mobile terminal equipments. Since the extension exclusive radio equipments 5-1...5-2L are provided to the master set, the connection with other remote mobile terminal equipments is facilitated by using the extension exclusive radio equipments 5-1...5-2L.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a wireless telephone system consisting of a parent device and a mobile terminal device wirelessly connected to the parent device. The present invention relates to a wireless telephone system that allows the installation of more mobile terminal devices than the number of wired telephone lines.

(Prior Art) As a wireless telephone system, for example, a cordless telephone system includes a base device to which a wired telephone line is connected, and a mobile device that has a handset and is wirelessly connected to the base device in one-to-one correspondence. It consists of a terminal device.

Therefore, in this type of radio telephone system, if two or more mobile terminal devices are to be installed, the same number of parent devices as the mobile terminal devices are required.

Also, the same number of wired telephone lines are required.

However, it is unlikely that a plurality of mobile terminals will be used at the same time, and it is uneconomical to have as many parent devices and wired telephone lines as there are mobile terminals.

Therefore, conventionally, multiple wired telephone lines can be connected to a single parent device, and while the same number of wireless LA devices as the wired telephone lines are provided, the number of mobile terminal devices is larger than the number of wireless devices in the parent device. A wireless telephone system has been proposed in which a large number of telephone lines are provided, and a call can be made to any wired telephone line from the mobile terminal side.

(Problems to be Solved by the Invention) By the way, as the number of mobile terminal devices increases, the installation locations of the mobile terminal devices will be spread out over a wide range, so it will be necessary to perform connection operations with other mobile terminal devices within the same wireless telephone system. It may happen.

However, conventional wireless telephone systems have a problem in that mobile terminal devices cannot communicate with each other while all wired telephone lines are in use.

The present invention was devised in view of these conventional problems, and its purpose is to provide a wireless telephone that allows free telephone calls between mobile terminal devices and the same landline even when all wired telephone lines are in use. The goal is to provide a system.

(Means for Solving the Problems) In order to achieve the above object, the wireless telephone system of the present invention has the following configuration.

That is, the wireless telephone system of the present invention includes a parent device to which N (N22) wired telephone lines are connected, and M (M>N) mobile terminal devices each having a handset and wirelessly connected to the parent device.
); The parent device includes N outside line dedicated radios for wirelessly connecting the wired telephone line and the mobile terminals; and 2L (
(L is a natural number) extension dedicated radios; control means for controlling the wireless connection; A selection means for selecting and specifying:

(Function) Next, the FE operation of the radio telephone system having the above configuration will be explained.

A certain mobile terminal device specifies a nearby mobile terminal device using its selection means and makes a call. Then, in the parent device that has received the radio paging signal, the control means establishes a wireless connection between the re-mobile terminal devices using the two extension-only radios.

As a result, all N wired telephone lines are busy, i.e.
Even if all N radios for external lines are in use, calls can be made between mobile terminal devices using the radio for internal lines.

As explained above, according to the wireless telephone system of the present invention, since the main device is provided with an extension-only wireless device,
Even if the installation range of the mobile terminal device is expanded, the advantage is that the extension-only radio device can be used to easily connect to other mobile terminal devices that are far away.

(Embodiment) Hereinafter, embodiments of the present invention will be described with reference to the drawings.The wireless telephone system of the present invention includes a parent device to which N (N22) wired telephone lines are connected, and a parent device to which N (N22) wired telephone lines are connected. It consists of M (M>N) mobile terminal devices that are wirelessly connected.

As shown in FIG. 1, the parent device includes a control unit 2 which also has an interface function with N wired telephone lines 1, and N external lines dedicated to each line of the wired telephone line 1 in an l-to-l correspondence. radios 3 (3-1 to 3-N), a control radio 4, and 2L (L is a natural number) extension-only radios 5 (
5-1 to 5-2L>. The control unit 2 is mainly composed of a microcomputer, and also has a line relay and a hybrid circuit, and the wireless 8113
, 4, and 5 respectively to connect N wired telephone lines 1.
Controls wireless connections between mobile terminals and mobile terminals and between the same mobile terminals.

As shown in FIG. 2, the mobile terminal device includes a radio 22 for wirelessly connecting the device to a parent device, and a keyboard 23 for sending out dial signals and the like.

The 0 selection display section 26, which basically includes a control section 24, a handset 25, and a selection display section 26, is made up of (N+L) switch groups each equipped with an indicator lamp. (1 to N shown on the left side of the figure) are for external calls that have a one-to-one correspondence with the wired telephone line, and a group of L switches (1 to L shown on the right side of the figure) are for the wireless 8 line dedicated to the extension line.
! It corresponds to 5 and 1 to l. That is, this selection display section 2
Reference numeral 6 denotes a selection means for selecting and specifying whether a call is to be made to a wired telephone line or to another mobile terminal device, and also displays the selected line.

The control unit 24 is mainly composed of a microcomputer,
It controls the wireless TF 122, keyboard 23, handset 25, and selection display section 26 to realize the functions of the device. Note that the identification information of the M mobile terminal devices is stored in the control unit of each mobile terminal device.

Next, FIGS. 3(A) to 3(E) are flowcharts showing the operation of the wireless telephone system of the present invention. below,
This will be explained according to FIGS. 3(A) to 3(E). In addition, to simplify the explanation.

The number of wired telephone lines N is 1st line and 2nd line N = 2
The main device radios are two for outside lines (TRXI, TR
There will be a total of 5 units: 1 unit for control (termed X2), 1 unit for control (termed TRX3), and 2 units for extension (termed TRX4 and TRX5).
The number M of mobile terminal devices is M=3 (each mobile terminal device is numbered '#1'r#2.+'#3'). Therefore, the selection display section 26 in each mobile terminal device The configuration is
There are two selection displays for outside lines and la for extension lines.

First, when a call arrives on the first line of the wired telephone line 1, the parent device sends an incoming call signal on the control channel using wireless ITRXI, and waits for reception of a response signal for the first line on the control channel. (Step 100), each mobile terminal device is on standby on the control channel, and when it receives an incoming call signal, it detects an incoming call from the first line from the signal.Steps 200, 300, and 400 ), the bell rings and the outside line indicator lamp 1 flashes (steps 201, 301, and 401).

Next, when the parent device receives a call from the second line of the wired telephone line 1, it uses the radio TRX2 to send out an incoming call signal on the control channel, and receives a response signal for the second line on the control channel. When each mobile terminal device receives an incoming call signal (step 101), it receives a second call signal from that signal.
Steps 202 and 302 to detect an incoming call from the line;
402), the bell rings and the outside line indicator lamp 2 flashes (steps 203, 303).
, 403).

Then, when mobile terminal #2 detects the selection of outside line 1 and off-hook (step 304), it sends a response signal corresponding to the first line using the control channel (step 304).
Step 305).

When the parent device receives the response signal for the first line on TRX1 (step 102), it sends a channel switching command signal to channel S1, which is vacant among the communication channels, and switches the channel of wireless 1III TRXI to channel S1 ( Step 103).

On the other hand, when the mobile terminal device 2 receives the channel switching command signal to the communication channel S1 (step 306), it switches the channel of the radio to the channel S1, and then sends out a switching completion signal using the channel S1 (step 307).
).

When the parent device telegraphs the switching completion signal on channel S1 (step 104), it sends out a call release signal on call channel S1 using wireless 1fiTRX1, and also connects the first line and wireless device TRXI via the line relay in the control unit.
(step 105), and sends a call release signal using the control channel of the radio TRX3 (step 106).

As a result, in response to receiving the call release signal on call channel S1, mobile terminal device #2 continuously lights outside line indicator lamp 1 on the selection display section, stops ringing the bell, and disconnects the handset and radio. Once the connection is established (step 308), an outside line call state is entered.

In addition, mobile terminal devices #1 and #3 turn on the outside line indicator lamp 1 of the selection display section continuously in response to receiving the call release signal on the control channel (step 204,
04).

Next, when mobile terminal #3 detects selection of outside line 2 and off-hook (step 405), it sends a response signal for the second line using the control channel (step 406).

The parent device transmits the response signal for the second line to radio TRX2.
(step 107), it sends a channel switching command signal to the vacant communication channel S2, and
The channel of RX2 is switched to speech channel S2 (step 108).

Then, when mobile terminal device #3 receives the channel switching command signal to call channel S2 (step 407),
The channel of the wireless device is switched to speech channel S2, and then a switching completion signal is sent using channel S2 (step 408).

Next, when the parent device receives the switching completion signal on the communication channel S2 (step 109), it sends a call release signal from the radio TRX2 using the communication channel S2, and the line relay in the control unit switches the second line and the radio. Connect the TRX2 (step 110), and at the same time connect the wireless fiTRX
From 3 onwards, the control channel is used and the currently active radio
TRX1 uses call channel S1 to send out a call release signal (steps 111 and 112).

As a result, in mobile terminal #3, in response to receiving the call release signal on call channel S2, the outside line indicator lamp 2 of the selection display section is lit continuously, the ringing of the bell 3 is stopped, and the handset and radio are switched on. Step 409) and enter into a talking state.

Furthermore, in mobile terminal device #1, in response to receiving the call release signal on the control channel, the outside line indicator lamp 2 of the selection display section is turned on continuously, and the bell rings? Stop (step 205).

Similarly, mobile end floor device #2 which is currently talking on call channel S1
Then, in response to the reception of the call cancellation signal that was sent by interrupting the call, the outside line indicator lamp 2 of the selection display section is turned on continuously (step 309).

Next, when mobile terminal #3 detects on-hook, it sends a call termination signal on call channel S2 (step 410). When the parent device receives the end signal on the radio TRX2 (step 113), it sends out the end signal on the call channel S2 and disconnects the second line and the radio TRX2 by the line relay of the control unit. (Step 114).

At the same time, the communication channel S
1 and the control channel from radio 1i T RX 3, respectively, to send out termination signals (step 1
15, 116).

As a result, mobile terminal #3 disconnects the handset and radio in response to receiving the termination signal on call channel S2, turns off the outside line indicator lamp 2 on the selection display section (step 411), and switches the channel to call. Switching from channel S2 to the control channel returns to the standby state (step 412).

Furthermore, mobile terminal device #2, which is currently talking on call channel S1, turns off the outside line indicator lamp 2 of the selection display section in response to the reception of the termination signal sent by interrupting the call (step 310).

Similarly, mobile terminal device #1 that received the termination signal on the control channel also turns off the outside line indicator lamp 2 of the selection display section (
Step 206).

Next, the parent device transmits a call termination tone due to the termination of the call by the other party on the first line from the radio TRX 1 to the communication channel S1.
(Step 117)
), the mobile terminal device #2 receives the end-of-call tone (step 310), and upon detecting on-hook, transmits a end-of-call signal on the communication channel S1 (step 311).

When the parent device receives a call termination signal on the communication channel S1 in the radio TRX1 (step 118), the parent device
A termination signal is sent from communication channel S1 from communication channel S1, and a line relay in the control unit connects wireless fiTRX1 and communication channel S1.
The line is disconnected (step 119), and at the same time
RXB sends an end signal on the control channel (step 120). As a result, mobile terminal device #2, which has received the end signal on call channel Sl, disconnects the handset and radio, and displays the outside line on the selection display section. Turn off the display lamp 1 (step 312), switch the channel from the call channel to the control channel, and return to the standby state (step 313).
).

Further, mobile terminal devices #1 and #3 that have received the end signal on the control channel turn off the outside line indicator lamp 1 of the selection display section (steps 207 and 413).

Next, when mobile terminal #2 detects selection of the second line and off-hook (step 314), it sends a calling signal for the second line on the control channel (step 315).

When the parent device receives a calling signal for the second line on the control channel of the radio TRX2 (step 121
), a channel switching command signal to speech channel S3 is sent on the control channel, and the channel is switched from the control channel to speech channel S3 (step 122). Then, when the mobile terminal #2 receives the channel switching command signal to the speech channel S3 on the control channel (step 316), the channel is switched from the control channel to the speech channel S3, and then the channel is switched on the speech channel S3. Send a completion signal (step 317), turn on the outside line indicator lamp 2 on the selection display section, and connect the handset and radio (step 318).

On the other hand, when mobile terminal devices #1 and #3 in the on-hook state receive a channel switching command signal to call channel S3 on the control channel at the same time as mobile terminal device #2 (steps 208 and 414), the selection display section (steps 209 and 415). Next, in step 123, when the parent device receives a switching completion signal on the call channel S3, the line relay in the control unit switches the line to the second line. The wireless fiTRX 2 is connected and a dial tone indicating line connection is sent to the mobile terminal #2. In response to this, the mobile terminal device #2 performs a keyboard operation and sends out a dial signal based on this on the call channel S3 (step 319>), and the parent device receives the dial signal and sends it out to the second line. Then, in step 124), a call is entered.

Next, in mobile terminal #3, extension selection and off-hook are detected (step 416), and an extension calling signal is sent via the control channel (step 417);
The parent device receives an extension call signal on the control channel using the radio TRχ4 (step 125), sends a channel switching command signal to the speech channel S4 using the control channel (step 126), and at the same time makes a speech on the speech channel S3. The internal wireless device TRX2 sends an extension calling signal (step 127), and the channel of the wireless 1fiTRX4 is switched to the communication channel S4 (step 128).

As a result, mobile terminal devices #1 and #3 that have received the channel switching command signal on the control channel light up the extension display lamps of the selection display section (steps 210 and 418),
After switching to the communication channel S4, the mobile terminal device #3 sends out a switching completion signal on the communication channel S4 (step 419), and connects the handset and radio (step 419).
In step 420), the mobile terminal device #2, which is currently talking on call channel S3, receives the extension call signal sent by interrupting the call channel S3 that is currently being called. Turn on the indicator lamp.

Next, when the M device receives the switching completion signal of the call channel S4 through the radio TRX4 (step 129), it sends a dial tone to the mobile terminal device #2, so the mobile terminal device #2 receives the number of the called party ( That is, the mobile terminal #1 number) is sent (step 421).

Therefore, the parent device receives the number of mobile terminal device #1 (Step 130) and uses the wireless 1fiTR based on that number.
An extension paging signal is sent from X5 to mobile terminal #1 (step 131).

When mobile terminal #1 receives the extension paging signal (step 211), it transmits an idle signal indicating that it is not in use on the control channel (step 212).

When the parent device receives the idle signal (step 132),
Send a channel switching command signal to speech channel S5 (step 13B), perform channel switching to speech channel S5 (step 134), and send mobile terminal device #
1 receives the channel switching command signal (step 2).
13>, After channel switching to call channel S5, a switching completion signal is sent on call channel S5 (step 214), and the bell rings and the extension indicator lamp flashes (step 215).

When the parent device receives the switching completion signal (step 13
5) Waiting for off-hook signal.

When off-hook is detected, mobile terminal device #1 transmits an off-hook signal on call channel S5 (step 216), stops ringing the bell, and continuously lights up the extension indicator lamp in the selection display section (step 217). ), the handset and radio are connected (step 218).

On the other hand, when the parent device receives an off-hook signal on the communication channel S5 (step 136), it connects the radio TRX4 and the radio TRX5 (step 137), thereby entering an extension call state.

(Effects of the Invention) As explained above, according to the wireless telephone system of the present invention, since the main device is provided with an extension-only radio,
Even if the installation range of the mobile terminal device is expanded, the advantage is that the extension-only radio device can be used to easily connect to other mobile terminal devices that are far away.

[Brief explanation of the drawing]

FIG. 1 is a configuration block diagram of a parent device according to an embodiment of the present invention, FIG. 2 is a configuration block diagram of a mobile terminal device according to an embodiment of the present invention, and FIGS. E) is a flowchart showing the motion procedure of the wireless telephone system of the present invention. 1...Wired telephone line, 2,24...
Control unit, 3 (3-1 to 3-N)...Radio device exclusively for outside lines, 4...Control radio device, 5 (5
-1~5-2 L)... Radio for extension only,
22... Radio device, 23... Keyboard, 25... Handset, 26... Choice display section. Agent Patent Attorney Yoshihiro Yahata / Figure 2 Example of Jikm's moving device Figure 3 (E) Figure 3 (E) (B) Shift) = Me3 [+Loss term CD]

Claims (1)

[Claims] a parent device to which N (N≧2) wired telephone lines are connected;
M (M>N) mobile terminal devices each having a handset and wirelessly connected to the parent device; The mobile terminal device comprises: a wireless device exclusively for external lines; 2L (L is a natural number) wireless devices exclusively for internal lines for wirelessly connecting mobile terminal devices; and a control means for controlling the wireless connection; 1. A wireless telephone system comprising: selection means for selectively specifying whether a call is to be made to a wired telephone line or to another mobile terminal device.