JPH06253052A - Communications terminal equipment with line switching function and line switching method - Google Patents

Abstract

PURPOSE:To save the power consumption of a communications terminal equipment, and to immediately connect a call from a communications center with the communications equipment, in the communications terminal equipment with a line switching function for connecting the communications terminal equipment with a telephone line, and a line switching method. CONSTITUTION:This device is equipped with a ring detecting means 1 which detects a ring signal, off-hook detecting means 2 which detects and outputs the off-hook state of a telephone set, and switching means 3 which selectively connects a line with the telephone set side or the communications terminal equipment side. Also, the device is equipped with a clock means 4 which counts an off-hook time, and a control means 5 which controls the switch means so that the line can be connected with the communications terminal equipment side when an off-hook signal within a prescribed time is detected after the detection of the ring signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal device with a line switching function for connecting a communication terminal device to a telephone line and a line switching method.

[0002]

2. Description of the Related Art In a conventional communication terminal device, a normal changeover switch is switched to the telephone side so that a call from a communication center (dialing) can be detected by the number of times of ring detection by a ring detecting portion (for example, for example). , JP Sho
62-180667).

[0003]

By the way, if the telephone goes off-hook before the number of times of ring detection reaches a predetermined number (the user raises the telephone), the communication center and the telephone are connected to each other, and then the telephone side (user). ) Notices an erroneous connection and goes on-hook (puts down the phone) to disconnect the line.

Therefore, when the communication center is connected to the communication terminal device, if there is a user on the telephone side, a call (dialing) from the communication center is received by the telephone before it is received by the communication terminal device. Therefore, it is difficult to connect the line with the communication terminal device even if the call is repeatedly made (dialing) from the communication center.

In other words, when there is a user near the telephone, the communication terminal cannot be connected to the line even if the call is repeatedly made from the communication center (dialing), and a long waiting time is required. Not only that, but there is a problem that the call charge increases due to redialing. Further, since the communication terminal device is often driven by a battery, it is desired to extend the life of the battery by reducing the power consumption thereof.

The present invention has been made in consideration of such circumstances, and provides a communication terminal device with a line switching function and a line switching method which consumes less power and can immediately connect a call from a communication center. Is.

[0007]

The present invention, as shown in FIG. 1, includes a ring detecting means 1 for detecting a ring signal, an off-hook detecting means 2 for detecting and outputting an off-hook state of a telephone, and a line for a telephone. Side or communication terminal device side, switch means 3 which is selectively connected, time-keeping means 4 for measuring the off-hook time, and when an off-hook signal for a predetermined time or less is detected after the ring signal is detected, the line is connected to the communication terminal. It is intended to provide a line switching communication terminal device provided with a control means 5 for controlling a switch means so as to be connected to a device side.

Further, the present invention, as shown in FIG. 1, detects a ring signal from a line and an off-hook signal of a telephone and selectively connects the line to either the telephone side or the communication terminal device side. In the above, when the off-hook signal is detected after the ring signal is detected, the off-hook time is measured, and when the off-hook time is detected to be a predetermined time or less, the line is connected to the communication terminal device side. It is provided.

Further, according to the present invention, as shown in FIG. 2, ring detecting means for detecting a ring signal from a line and off-hook detecting means 6 for detecting an off-hook state of a telephone set.
In the line switching device for the communication terminal device, which selectively connects the line to either the telephone side or the communication terminal device side based on the output of
And a time measuring means 8 for measuring the off-hook duration time and comparing it with a predetermined time, and a power supply control means 9 for cutting off the power supply to the off-hook detection means when the off-hook state continues for a predetermined time or more after the ring signal is detected. The present invention provides a communication terminal device with line switching function.

[0010]

In FIG. 1, the ring detecting means 1 detects the ring signal of the communication line, and the off-hook detecting means 2 detects and outputs the off-hook state of the telephone. The switch means 3 selectively connects the line to either the telephone side or the communication terminal side, and the clocking means 4 clocks the off-hook time. Then, the control means 5 controls the switch means 3 so as to connect the line to the communication terminal device side when an off-hook signal for a predetermined time or less is detected after the ring signal is detected.

In FIG. 2, the power source 7 drives the off-hook detecting means, and the time measuring means 8 measures the off-hook duration time and compares it with a predetermined time. And the power supply control means 9
Shuts off the power supply to the off-hook detecting means 6 if the off-hook state continues for a predetermined time or longer after the ring signal is detected.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. This does not limit the present invention. First Embodiment FIG. 3 is a block diagram showing a first embodiment of the present invention.
A is a communication terminal device, B is a telephone station, C is a communication center, and L1
Is a communication line L2 connecting the communication terminal device A and the telephone station B, and a communication line L2 connecting the telephone station B and the communication center C.

Reference numeral 11 is a controller section for controlling collection of information of each block in the communication terminal device A, 12 is a transmitting section for transmitting communication data to be sent to the center C, 13 is a receiving section for receiving communication data from the center, Reference numeral 14 is a hybrid unit for converting the directions of the two-wire portion of the line and the four-wire portion of the transmitting / receiving unit, 16 is a transformer unit for converting the interface between the line (balanced type circuit) and the communication terminal circuit, and 15 is a ring. A ring detection unit that detects the presence or absence of a signal and outputs a signal S1, 18 is a telephone for talking, 19 is an off-hook detection unit that detects the presence or absence of an off-hook of the telephone 18, and outputs a signal S2, and 17 is a controller A changeover switch unit for changing over the communication line L1 to the communication terminal device A side or the telephone set 18 side by control (signal S3) from 11, and 20 is connected to the telephone station B. And is another of the phone.

The controller 11 measures the time from the off-hook to the on-hook of the telephone 18 after detecting the generation of the ring signal from the line L1. If the off-hook time is within the prescribed time T1 (for example, 3 seconds), the changeover switch It instructs the section 17 to switch the communication line L1 to the communication terminal device A side.

The operation in such a configuration will be described with reference to FIGS. 4 and 5. Normally, the changeover switch unit 17
Is connected to the telephone 18 side, the connection from the telephone 20 to the telephone 18 is the same as the normal line connection procedure. On the other hand, when a call is made (dialing) from the communication center C to the communication terminal device A, the operation is as follows.

When the telephone station B recognizes the terminal connection line by dialing from the communication center C and sends a ringing tone (ring) to the telephone 18, the communication terminal device A detects the ring. The user on the telephone 18 side picks up the handset by the ringing tone, and the off-hook detection unit 19 of the communication terminal device A detects the off-hook.

On the communication center C side, a single tone starts to be transmitted by the line connection recognition, and the user on the telephone 18 side recognizes that the data is to the communication terminal device A by receiving the single tone, and the telephone Within a specified time T1. The controller 11 of the communication terminal device A switches the line L1 to the communication terminal device A side when the off-hook detected after detecting the ring signal becomes the on-hook within the specified time T1. The communication terminal device A sends the detection of the single tone to the communication center C as an ACK and starts communication.

In other words, in this embodiment, the ring signal is detected as the signal S1 by the ring detector 15, and then the off-hook time (signal S2) of the telephone 18 is monitored by the controller 1 to determine the off-hook time as the specified time T.
Within 1, the changeover switch unit 17 is controlled to switch the communication line to the communication terminal device A side.

Therefore, even if the telephone 18 receives an outgoing call (off-hook) to the communication terminal device A, the user of the telephone 18 recognizes that the outgoing call is to the communication terminal and on-hooks the communication line. Since the terminal device A is switched to, the communication line is not disconnected and the communication terminal device A can immediately perform communication. In this embodiment, one communication terminal device and one telephone are described, but the present invention can be applied between a plurality of communication terminal devices and telephones.

Second Embodiment A second embodiment obtained by modifying a part of the first embodiment (inside the broken line in FIG. 3) will be described below. FIG. 6 is a block diagram showing a main part of the second embodiment. Reference numeral 22 is a power supply (battery) for driving the off-hook detection unit 19, and 23 is a power supply control unit for controlling supply of drive power to the off-hook detection unit 19. is there. The power supply control unit 23 turns on / off the power supply of the off-hook detection unit 19.
Power switch unit 24 to be turned on, and power switch unit 24 is turned on
AND gates 27 and 2 that include a ring signal continuation timer 25 that outputs a signal and an OFF signal and an off-hook signal continuation timer 26, and that calculates a logical product of each signal.
8 and an inverter 29 for inverting the signal.

The ring signal continuation timer 25 is a timer which is started by the input of the ring signal and ends when the ring signal is not input for a predetermined time T3, and gives an ON signal to the power switch section 24 by the ring signal input, If the off-hook state is not established thereafter, an OFF signal is given at the end.

The off-hook signal continuation timer 26 is a timer which is started by the start of the off-hook state and ends when the on-hook state is reached or when the on-hook state continues for a predetermined time T2 (for example, 10 seconds). At the end of the timer, an OFF signal is given to the power switch unit 24. The power switch unit 24 is also adapted to turn on / off the power supply from the battery 22 to the off-hook detection unit 19 in response to a signal from the controller 11. Other configurations are the same as those of the first embodiment shown in FIG.

The operation in such a configuration will be described with reference to FIGS.
This will be described using the time chart shown in. As shown in FIG. 7, when a ring signal is input, it is detected as a ring detection signal S1. After that, when the off-hook state is not entered and the ring detection signal S1 is not present for the predetermined time T3 (for example, 3 seconds), the ring continuation timer 25 ends and the power switch 24 receives the OFF signal,
The power supply to the off-hook detection unit 19 is stopped.

At the same time, the controller 11 controls the changeover switch unit 17 to switch the communication line to the communication terminal device A side, and if the received data is the communication data from the communication center C, it is received, and the communication center sends it. If it is not communication data, the changeover switch unit 17 is controlled to connect the communication line to the telephone 18 side.

Next, as shown in FIG. 8, when a ring signal is input, it is detected as a ring detection signal S1, and at the same time, the ring continuation timer 25 is activated to give an ON signal to the power switch 24 to turn it off hook. Power is supplied to the detection unit 19. Then, in the off-hook state, the ring continuation timer 25 ends and the off-hook continuation timer 26 operates. When the off-hook state continues for a predetermined time T2 or more, the telephone 18 recognizes that the telephone call is in progress, the off-hook continuation timer 26 ends, the OFF signal is output, and the power supply to the off-hook detection unit 29 is stopped.

When the controller 11 sends communication data to the communication center C, the power switch section 24 is supplied with an ON signal from the controller 11 for a short time T4, and the off-hook detection is performed for the time T4 (for example, 1 second). Power is supplied to the unit 19, and the use state of the telephone 18 is confirmed by the off-hook detection signal S2. If the telephone 18 is in use (off-hook state), the communication line L1 remains connected to the telephone 18 side.

Then, after a certain period of time, power is supplied to the off-hook detector 19 again for a time T4, and the telephone 18 is restarted.
When the telephone 18 is in the on-hook state, the controller 11 controls the changeover switch unit 17 to connect the communication line L1 to the communication terminal device A side and send the communication data to the communication center C.

Next, FIG. 9 is a time chart showing the operation of the second embodiment in correspondence with the operation shown in FIG. At the same time as the detection of the ring signal, power is supplied to the off-hook detection section 19, and when the off-hook detection section 19 continues to be in the off-hook state, the off-hook detection section 19 outputs the off-hook detection signal.

When the on-hook state is reached within the predetermined time T2, the off-hook continuation timer 26 ends, the OFF signal is input to the power switch section 24, and the power supply to the off-hook detection section 19 is turned off. At the same time,
As in FIG. 4, the controller 11 switches the line L1 to the communication terminal side and starts communication with the communication center C.

According to the second embodiment, since the power supply time to the off-hook detecting unit is limited to the necessary minimum, the power consumption of the communication terminal device is saved and the communication terminal device is driven by the battery. The battery life can be extended.

[0031]

According to the present invention, even when a telephone receives a call (dialing) to a communication terminal device, the line can be switched to the communication terminal device side quickly and reliably, so that the line is disconnected. It is prevented, the performance of the communication terminal device is improved, and the call charge is reduced. According to the invention,
Since the power consumption of the off-hook detecting means that detects and outputs the off-hook state is suppressed to the minimum, the power consumption of the communication terminal device is saved, and the battery life is extended when the communication terminal device is driven by the battery. It comes off.

[Brief description of drawings]

FIG. 1 is a block diagram showing the basic principle of the present invention.

FIG. 2 is a block diagram showing the basic principle of the present invention.

FIG. 3 is a block diagram showing a first embodiment.

FIG. 4 is a time chart showing the operation of the first embodiment.

FIG. 5 is an explanatory diagram showing an operation sequence of the first embodiment.

FIG. 6 is a block diagram showing a second embodiment.

FIG. 7 is a time chart showing the operation of the second embodiment.

FIG. 8 is a time chart showing the operation of the second embodiment.

FIG. 9 is a time chart showing the operation of the second embodiment.

[Explanation of symbols]

 A communication terminal device B telephone station C communication center 11 controller 12 transmission unit 13 reception unit 14 hybrid unit 15 ring detection unit 16 transformer 17 changeover switch unit 18 telephone 19 off-hook detection unit

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiroki Narita 3-22-8 Hakataekimae, Hakata-ku, Fukuoka-shi, Fukuoka Prefecture Fujitsu Kyushu Digital Technology Co., Ltd.

Claims (3)

[Claims] 1. A ring detecting means (1) for detecting a ring signal, an off-hook detecting means (2) for detecting and outputting an off-hook state of a telephone, and a line is selected to either a telephone side or a communication terminal device side. Switch means (3) that are connected to each other and a clock means (4) that measures the off-hook time
And communication with a line switching function including control means (5) for controlling the switch means (3) so as to connect the line to the communication terminal device side when an off-hook signal for a predetermined time or less is detected after the ring signal is detected. Terminal device. 2. A line switching method for detecting a ring signal from a line and an off-hook signal of a telephone and selectively connecting the line to either the telephone side or the communication terminal side,
When an off-hook signal is detected after the ring signal is detected,
A line switching method characterized by measuring an off-hook time, and connecting the line to a communication terminal device side when detecting that the off-hook time is shorter than a predetermined time. 3. The line is selected to either the telephone side or the communication terminal side based on the outputs of a ring detecting means for detecting a ring signal from the line and an off-hook detecting means (6) for detecting an off-hook state of the telephone. In a communication terminal device with a line switching function to be connected to each other, a power source (7) for driving an off-hook detecting means (6), a clocking means (8) for measuring an off-hook duration time and comparing it with a predetermined time, and a ring signal detection A communication terminal device with a line switching function, comprising a power supply control means (9) for cutting off the supply of power to the off-hook detection means (6) when the off-hook state continues for a predetermined time or more.