JPH089074A - Dial-in line connection method for communication terminal equipment - Google Patents

Abstract

PURPOSE:To prevent the cost increase in the terminal equipment and the large sized equipment by providing a battery supplying an operation power supply and supplying power from the battery to the terminal equipment only for a prescribed period for line control at the arrival of an incoming call. CONSTITUTION:The terminal equipment is provided with a battery 220 supplying operating power supply to a dial CPU 225 for controlling line, The battery 220 is not used when a commercial power is normal and when an incoming call is in standby for a power failure but used only for a prescribed period for line control of dial-in service at the arrival of the call. Furthermore, no communication is made by a facsimile communication means 2 during power failure. Thus, it is not required to supply power continuously from the battery 220 and a large power for the facsimile communication means 2 is not required. Thus, a small capacity battery is enough for the battery 220, the equipment cost is reduced and the equipment is made small in size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a PSTN (Publi).
c Switched Telephone Network
The present invention relates to a dial-in line connection method for a communication terminal device that uses the dial-in service of rk) and performs a data communication operation or a telephone response operation according to the extension designation received from the exchange side when receiving a call.

[0002]

2. Description of the Related Art PSTN has a service called dial-in. By using this dial-in service, it is possible to connect a plurality of terminal devices to one telephone line and give different telephone numbers to each terminal. As a result, the corresponding terminal devices can respond to and communicate with the incoming calls of the respective telephone numbers.

Japanese Unexamined Patent Publication No. 5-145682 discloses a facsimile machine which utilizes such a dial-in service. In the case of this facsimile machine,
One telephone number is given to the built-in telephone and another telephone number is given as a facsimile device.

As a result, the facsimile machine is
If one user receives an incoming call on one phone number, the user can answer and make a call on the phone, and another user receives the call on another phone number.
The facsimile machine automatically responds and executes predetermined facsimile communication.

When the dial-in service is used, when an incoming call arrives, first, a response is received and the extension-specified number information transmitted from the central office is received and the line is disconnected. Then, it is necessary to perform a line control different from the usual one, such as responding again to start a predetermined communication.

In the proposed facsimile machine, such line control is executed under the supervisory control of the CPU. Therefore, the CPU is always supplied with operating power.

A commercial power supply of 100 V is usually used as such an operating power supply. However, the commercial power supply may fail due to an accident or the like. If the power fails, the CPU
Becomes inoperable.

Therefore, the facsimile apparatus proposed above is
When an incoming call was received during a power failure, the predetermined line control by the CPU could not be executed. For this reason, for example, even when an incoming call arrives at the telephone, the user cannot make a call with the other party simply by going off-hook from the telephone as usual.

In this case, if the user executes the above-mentioned line control by manual operation, such as off-hooking the telephone, then on-hooking, and then off-hooking again, the user can talk. However, in order to execute such an operation, the user must recognize that a power outage is occurring, or remember the operation procedure for line control in advance.
Therefore, there is an inconvenience that the operation becomes difficult.

By the way, a method of backing up the operating power supply of the CPU with a battery can be considered in order to execute the above-mentioned predetermined line control even in the case of a power failure. However, in that case, the CPU must be continuously supplied with power during the power outage, and a large capacity battery is required. As a result, the cost of the device becomes high, and the size of the device becomes large.

The inconveniences described above have occurred not only in the facsimile machine but also in the case where the dial-in service is used in other communication terminal devices.

[0012]

As described above, in the case of using the dial-in service, it is difficult for the conventional communication terminal device to operate even in response to an incoming call when a power failure occurs. Further, if the operation is attempted to be easy, another problem such as an increase in device cost and an increase in size of the device has occurred.

An object of the present invention is to make it possible to easily respond to incoming telephone calls even during a power failure, and to prevent an increase in device cost and an increase in size of the device.

[0014]

To this end, according to claim 1 of the present application, a battery for supplying an operating power source is provided separately from an externally supplied power source, and the battery is connected to the communication terminal device from the above power source. Power is not supplied during normal operation and during standby for incoming calls during power outages, and power is supplied only during a fixed period when executing line control for dial-in service during incoming calls during power outages.

According to the present invention, a plurality of telephones are provided, and the plurality of telephones are individually connected according to the extension designation received from the exchange side.

According to a third aspect of the present invention, when an incoming call arrives and the device goes off-hook before the device detects the incoming call and starts operating, the line control of a predetermined dial-in service is executed to make the telephone call. To control the call state.

According to the present invention, when an incoming call is received during the power failure period and the extension designation received from the telephone office side is a communication terminal device, as an alternative operation, the incoming call is notified and a call is made by off-hook of the equipped telephone. I try to control the state.

According to a fifth aspect of the present invention, there is provided means for presetting whether or not to execute the proxy operation.
I try not to answer incoming calls.

In the sixth aspect, the notification of the incoming call is performed by ringing a buzzer that operates with a smaller power than that of a ringing device built in the telephone.

[0020]

According to the first aspect of the present invention, the line control of the dial-in service is executed even during a power failure, so that the user can easily answer an incoming call and talk.
In addition, since the power is supplied from the battery to the communication terminal device only during a certain period during which line control is executed when an incoming call arrives, a battery with a small capacity can be used, increasing device cost and increasing the size of the device. Can be prevented.

In the second aspect, when a plurality of telephones are provided, for example, a telephone built in the apparatus and an external telephone, the plurality of telephones are individually controlled, so that the apparatus is more convenient. Can be used.

In the third aspect of the present invention, when an incoming call is received, the predetermined line control is automatically executed even if the user goes off-hook on the telephone before the device detects the incoming call and starts operation. The user's response operation becomes easy.

In claim 4, when an incoming call is received during the power failure period and the extension is designated as a communication terminal device, as a substitute operation,
You can answer on the phone, so the calling user
When making a call manually or listening to the response of the called side as a monitor sound, the called side user can notify the calling side user by voice that the data communication cannot be performed.

[0024] In the fifth aspect, the proxy operation can be arbitrarily executed as necessary. If it is not executed, the incoming call is not answered, and the communication fee is not charged to the other party.

In the sixth aspect, the notification of the incoming call is
Since the buzzer that operates with a small amount of power is used, it is possible to reduce the power consumption of the battery during a power failure.

[0026]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a facsimile apparatus according to an embodiment of the present invention. In the figure, a telephone line 1 is connected to a facsimile device 2,
An external telephone 3 and a buzzer 4 are connected to the facsimile device 2. The telephone line 1 is a line that receives a dial-in service according to a predetermined contract with a telecommunications carrier.

The facsimile device 2 is a 100 V (not shown).
The commercial power source is used. The external telephone 3 is an ordinary telephone. Therefore, although a bell for notifying an incoming call is built-in, the buzzer 4 is provided separately from the built-in bell for notifying an incoming call at the time of power failure. The external telephone 3 and the buzzer 4 are arranged at the same place apart from the facsimile device 2.

In the facsimile apparatus 2, the switching circuit S
1 to S3, switch S4, and hook switch S5
Is to open / close or switch connection of the telephone line 1 in the apparatus. The DC detection circuit 201 detects whether any circuit in this device forms a DC loop with respect to the telephone line 1, that is, a hook state. The modem 202 sends and receives image information via the telephone line 1. This modem 202 is a DTM
F (Dual Tone Multi-Frequen)
It also has a function of receiving cy).

The polarity reversal detection circuit 203 detects the polarity reversal of the DC voltage between the two lines of the telephone line 1. The scanner 204 reads a document image. The plotter 205 records an image on recording paper. While the operation display unit 206 is used by the user to perform various operations,
The device displays an operating state and the like. Memory 20
Reference numeral 7 temporarily stores image information.

The ringing detection circuit 208 is connected to the telephone line 1.
The ringing signal received from is detected. The DC supply circuit 209 applies a DC voltage to the external telephone 3. The telephone drive circuit 210 rings a bell built in the external telephone 3. The DC detection circuit 211 detects the hook state of the external telephone 3 while the DC voltage is being applied from the telephone drive circuit 210 to the external telephone 3.

The call circuit 212 and the handset 213 form a built-in telephone of the facsimile apparatus 2. The call circuit 212 is the signal circuit thereof, and the handset 213 is a transmitter and a handset held by the user. The DC detection circuit 214 is
The hook state of the built-in telephone is detected. The smoothing circuit 215 rectifies and smoothes the AC voltage of the ringing signal received from the telephone line 1 and outputs DC power.

The DTMF detection circuit 216 receives a DTMF signal. The DC detection circuit 217 detects a hook state of the external telephone 3 with respect to the telephone line 1. The DC loop closing circuit 218 forms a DC loop for the telephone line 1 and puts it in an off-hook state. The ringing detection circuit 219 detects a ringing signal received from the telephone line 1.

The battery 220 is used as a power source for operating the apparatus when the commercial power source fails. The power failure detection circuit 221 detects a power failure of the commercial power source.
The operation unit 222 is used to pre-register operating conditions of the telephone line 1 at the time of power failure, or to input a dial number when making a call. The buzzer 223 informs of an incoming call at the time of power failure.

The system control section 224 controls, among the above circuits or devices, those related to facsimile communication. The dialer CPU 225 is originally
It is provided for line control at the time of call origination and transmission of dial signals, but in the present embodiment, in addition to those controls, it performs line control for dial-in service at the time of incoming call during power failure. Is.

The switch S6 supplies power from the battery 220 to the dialer CPU 225 for a certain period during a power failure. Note that the buzzer 223 and the buzzer 4 ring with a DC power supply having a low voltage and a small current as compared with a bell built in the external telephone 3.

With the above-mentioned configuration, in the facsimile apparatus 2 of this embodiment, as shown in FIG. 2, a facsimile communication means 2a, a built-in telephone 2b, and a dial-in line control means 2c are configured by the above hardware. ing. The dial-in line control means 2c executes an incoming call operation corresponding to the dial-in service.

Here, the outline of the dial-in service and its incoming operation will be described.

In this embodiment, three telephone numbers X, Y, and Z are assigned in the dial-in contract for the telephone line 1.
The user allocates three telephone numbers X, Y, Z to each of the three communication means of the facsimile communication means 2a, the built-in telephone 2b, and the external telephone 3 in the facsimile apparatus 2.

When making a call to the facsimile apparatus 2, the calling side dials the telephone number X, Y or Z. As a result, the exchange 2 calls the facsimile device 2 and the facsimile device 2 responds. At this time,
The dial-in line control means 2c carries out a predetermined line control, and one communication means to which a response is made responds to carry out a predetermined communication.

In this embodiment, only the internal telephone 2b or the external telephone 3 can communicate and the facsimile communication means 2a does not communicate during a power failure of the commercial power supply.

Next, a registration process executed in advance before using the facsimile apparatus 2 will be described.

In this embodiment, the user first registers in the facsimile apparatus 2 whether or not to use the dial-in service. When using, next, the facsimile communication means 2a of the facsimile device 2 and the built-in telephone 2b
To each of the three communication means of the external telephone 3 and the external telephone 3, the three telephone numbers X given by the dial-in contract,
Register Y and Z. In addition, when a facsimile communication is received during a power outage, it is registered whether or not a substitute response is made by the telephone. Further, when making a substitute response, whether the substitute response is executed by the built-in telephone 2b or the external telephone 3
Register whether to respond on behalf of. These registration processes are
It is executed by a predetermined operation of the operation unit 222.

Next, the incoming operation of the facsimile apparatus 2 when the commercial power supply is normal will be described.

The facsimile device 2 is called from a telephone or a facsimile device of a communication partner, and receives the call through the PSTN exchange. At this time, as shown in FIG.
First, the voltage polarities of the two lines L1 and L2 of the telephone line 1 are reversed, and then the ringing signal is transmitted from the exchange.

In the initial state of the facsimile apparatus 2, the switching circuits S1 to S5 are all connected to one contact a side. The call signal is sent from the telephone line 1 to the switching circuit S.
1, S2, S4, hook switch S5 and switching circuit S
The data is input to the external telephone 3 via 3 sequentially. At this time, the ringing detection circuit 208 detects the ringing signal.
Upon detection of this calling signal, the system control unit 224 determines the incoming call and switches the switching circuit S1 to the other contact b side. As a result, a DC loop of the telephone line 1 is formed, and a response to the incoming call is executed. This response is the primary response for dial-in line control.

After this, the exchange sends out the number information for designating the extension, that is, the number information X, Y or Z by the DTMF signal.

In this embodiment, the modem 202 receives the number information. After reading the received number information, the system control unit 224 returns the switching circuit S1 to the contact a side.
As a result, the DC loop of the telephone line 1 is disconnected, and the exchange is notified of the completion of receiving the number information.

Next, the system control section 224 determines, based on the received number information, whether the incoming call is to the facsimile communication means 2a, the internal telephone 2b or the external telephone 3.

When the incoming call is to the facsimile communication means 2a, the switching circuit S1 is switched to the contact b side again. Then, the predetermined communication operation of the facsimile is executed. By switching the switching circuit S1 to the contact b side, a direct current loop is formed again for the telephone line 1. This allows
A secondary response of dial-in line control is executed to the exchange. After this secondary response, the switching station repolarizes the voltage polarity of the telephone line 1.

Then, the facsimile communication by the facsimile communication means 2a is started. In this case, for example, the modem 202 receives image information while performing transmission control,
The image information received by the system controller 224 is transferred to the plotter 20.
Record output at 5.

On the other hand, in the case of an incoming call to the built-in telephone 2b, the system control section 224 sends predetermined control information to the dialer CPU 225, and the dialer CPU 225 makes the buzzer 223 ring. The user hears the buzzer sound and lifts the handset 213. The hook switch S5 is a hook switch interlocking with the handset 213, and is switched to the contact b side by the above operation. As a result, the call circuit 212 operates so that the user can talk with the other party using the handset 213.

When the call is received by the external telephone 3, the dialer CPU 225 causes the buzzer 4 to ring.
The user hears the buzzer sound and takes the external telephone 3 off-hook. At this time, since the external telephone 3 is connected to the telephone line 1, it becomes possible to talk with the other party.

When the above respective communications are completed, the switching circuits S1, S2, S4, the hook switch S5 and the switching circuit S3 are returned to the initial state, and the communication operation is completed.

Next, the incoming operation of the facsimile apparatus 2 during a power failure of the commercial power supply will be described.

4 and 5 show the incoming call operation in this case. That is, when an incoming call arrives at the facsimile apparatus 2, the smoothing circuit 215 rectifies and smoothes the ringing signal, which is an AC signal, and outputs DC power. Dialer CPU22
5 starts with the DC power (process 1001), and determines whether or not there is a power failure (process 1002). The power failure of the commercial power source is detected by the power failure detection circuit 221.

When the dialer CPU 225 determines that the power is out (Y in process 1002), the switch S6 is closed and power is supplied from the battery 220 (process 1003). After this, it is determined whether the ringing signal is still continuously received (process 1004). Normally, the ringing signal is continuously received until the called party answers.

When the ringing signal is continuously received (Y in process 1004), it is determined whether line control for dial-in is necessary (process 1005). That is, if the use of the dial-in service is registered in the registration process, it is determined that line control is necessary. In this case (Y in process 1005), the hook state of the external telephone 3 is determined (process 1006). The hook state of the external telephone 3 is detected by the DC detection circuit 217.

Here, the hook state of the external telephone 3 is determined by determining whether the external telephone 3 is off-hooked by the user because the external telephone 3 sounds by the received call signal. This is because.

The external telephone 3 is not off-hook,
When in the on-hook state (Y of processing 1006), FIG.
Execute the line control described in. That is, the DC loop closing circuit 218 forms a DC loop for the telephone line 1 and makes a primary response to the exchange (process 100).
7). Next, the DTMF detection circuit 216 receives the extension-designated number information from the exchange (process 1008). Then, the switch S4 is opened to disconnect the DC loop, and the completion of reception is notified (process 1009).

Next, it is judged from the received number information whether the incoming call is to the facsimile communication means 2a, the internal telephone 2b or the external telephone 3 (step 101).
0).

When the call is received by the built-in telephone 2b ("Built-in telephone" in process 1010), the buzzer 223 is rung (process 1011), and the off-hook of the handset 213 and the elapsed time are monitored (process 1012, process 1012). Process 1013 from N of 1010 and process 1012 from N of process 1013
What). The hook state of the handset 213 is the DC detection circuit 2
Detected at 14.

The user hears the buzzer sound and takes the handset 213 off-hook. As a result, the hook switch S5 is switched and the call with the other party becomes possible.

As described above, when the handset 213 is hooked off (Y in step 1012), the buzzer 223 stops ringing (step 1014). Further, when the handset 213 is not off-hook even after a preset fixed time has elapsed (Y in process 1013), the buzzer 223 also stops ringing (process 1014).

Then, the switch S6 is opened to stop the power supply from the battery 220 to the dialer CPU 225 (process 1015). After that, when the call ends and the handset 213 is hooked, the facsimile device 2 returns to the initial state.

On the other hand, if the incoming call is to the external telephone 3 (“External telephone” in step 1010), the buzzer 4 is activated (step 1011), and the off-hook of the external telephone 3 and time elapse are monitored ( Process 1017, N of process 1017 to process 1018, N of process 1018 to process 1017).
The hook state of the external telephone 3 is detected by the DC detection circuit 217.

The user hears the buzzer sound and takes the external telephone 3 off-hook. This enables a call with the other party.

In this way, when the external telephone 3 is hooked off (Y in processing 1017), the ringing of the buzzer 4 is stopped (processing 1019). If the external telephone 3 is not hooked off (Y in process 1018) even after the elapse of a predetermined period of time (Y in process 1018), the ringing of the buzzer 4 is similarly stopped (process 1019).

Then, as in the above, the battery 220
The power supply of is stopped (process 1015). After this, when the call ends and the external telephone 3 is hooked on, the facsimile apparatus 2 returns to the initial state.

On the other hand, if the incoming call is to the facsimile communication means 2a ("FAX" in the process 1010), it is determined whether or not the substitute response is necessary based on the registration information (process 1016). That is, in the registration process, when the fact that the telephone is acting as a substitute is registered (Y in process 1016), it is determined whether it is the built-in phone 2b or the external phone 3 (process 1021).

If the built-in telephone 2b is designated ("Built-in telephone" in processing 1021), the above processing 101
Similarly, 1 and subsequent steps are executed. If the external telephone 3 is designated (“external telephone” in process 1021), the above process 1016 and subsequent processes are similarly processed.

Thus, the user can answer the call from the facsimile machine by telephone. Usually, a facsimile device has a monitor function of outputting a reception sound from a speaker when a call is made. Therefore,
The transmitted voice of the called user is output from the speaker of the calling facsimile, and the message can be transmitted to the calling user. Further, even when the calling user makes a manual call on the telephone, the message can be transmitted to the other party.

On the other hand, if it is registered that the proxy response is not made (N in process 1016), the process is terminated without making a response (to process 1015).

By the way, after the reception of the ringing signal, the dialer CPU 225 controls the external telephone 3 to ring for a short time until a primary response is made. This may cause the user to take the external telephone 3 off hook.

In this case (N in process 1006), the extension designation number information is received without the primary response (process 10).
22). Then, the switch S4 is opened to disconnect the DC loop, and the reception completion is notified (process 1023). After this,
After a preset constant time (process 1024), the switch S4 is closed again to form a DC loop (process 102).
5). As a result, the secondary response of the dial-in line control is executed, and the external telephone 3 can talk with the other party.

In this case, the power supply to the battery 220 is immediately stopped to end the control operation (process 1015).
What).

By the way, the above operation is performed by dial-in /
This is the operation when receiving the service. The facsimile apparatus 2 of this embodiment can also be used on a normal telephone line that does not receive dial-in service.

When using a normal telephone line, in the first registration processing, the user registers in advance that the dial-in service will not be used.

When a message indicating that the dial-in service is not used is registered at the time of an incoming call during a power failure (process 1005)
N), the buzzer 223 is sounded (process 1026), and the process waits until the ringing signal stops (process 1027 N loop). At this time, the ringing signal is the ringing detection circuit 21.
9 detected.

The user hears the buzzer sound, and the handset 2
Take 13 off-hook. As a result, it becomes possible to talk with the other party.

When the handset 213 goes off-hook, the ringing signal stops. When the calling signal stops (process 102)
7), and stop ringing the buzzer 223 (process 102).
8) and ends the operation in the same manner as above (process 1015).
What).

In the first operation described above, if the power failure is not occurring (N in process 1002), the operation is terminated as it is. That is, in this case, the above-mentioned system control unit 22
The control operation on the side 4 is executed.

As described above, in this embodiment, regardless of whether the commercial power supply is normal or out of power, the
When the line control of a predetermined dial-in service is executed and the extension designation received from the exchange is the built-in telephone set 2b or the external telephone set 3, the incoming call is notified, and the call state is set by off-hooking the corresponding telephone set. I'm trying to control. As a result, even during a power failure, the user can easily respond to an incoming call to the telephone and make a call.

Further, in the present embodiment, the dialer CPU 225 for executing the above-mentioned line control is provided with the battery 220 for supplying the operating power, but the battery 220 is
It is not used when the commercial power supply is normal or when waiting for an incoming call during a power outage, but only during a certain period when the line control of the dial-in service is executed when receiving an incoming call. In addition, during the power failure, the facsimile communication means 2a does not communicate.

Therefore, it is not necessary to continuously supply power from the battery 220 during the power failure period. Further, the large electric power required for the facsimile communication means 2a becomes unnecessary. This allows the battery 220 to have a small capacity, reduce the cost of the device, and reduce the size of the device.

Since the built-in telephone 2b and the external telephone 3 are provided and the two telephones are individually connected according to the extension designation received from the exchange, the apparatus can be used more conveniently.

Further, when receiving a call, the dialer CPU 225
Even if the user goes off-hook on the external telephone 3 before the control operation of, the predetermined dial-in /
The line control of the service is executed to control the external telephone 3 to the call state. This allows the user to
Since it is not necessary to execute the line control manually, the response operation becomes easy.

Further, when the facsimile communication means 2a receives an incoming call during the power failure period, the internal telephone 2b or the external telephone 3 can respond on behalf of the user, so that the called user transmits a message to the calling user. be able to.

Further, there is provided means for presetting whether or not to execute the proxy response, and when the proxy response is not made, the incoming call is not answered. As a result, if it is not necessary to convey a message, or if the facsimile machine at the other end does not have a function of monitoring the received voice, the communication fee is not charged to the other end by not answering the incoming call.

Further, a buzzer 223 for notifying an incoming call
The buzzer 4 and the buzzer 4 used are those that operate with less power than the bell built in the external telephone 3. Thereby, the power consumption of the battery 220 at the time of power failure can be reduced.

In the above embodiment, during the power failure period,
Even if an incoming call arrives at the facsimile communication means 2a, the facsimile communication means 2a is prevented from communicating, but the battery 22
If the capacity of 0 is sufficient, power can be supplied from the battery 220 to the hardware of the facsimile communication unit 2a, and the facsimile communication unit 2a can also perform communication as in normal times.

Further, the facsimile communication means 2a is provided by one line.
Although three types of communication means, that is, the built-in telephone 2b and the external telephone 3, are used properly, two or more facsimile communication means and three or more telephones may be provided and used properly.

Furthermore, in the above-mentioned embodiments, the facsimile apparatus is explained as an example, but the present invention is not limited to the facsimile apparatus and can be similarly applied to various data communication terminal apparatuses equipped with a telephone.

[0094]

As described above, according to the first aspect of the present invention, the battery for supplying the operating power is provided, and the communication terminal device is provided with the battery during the normal operation of the power supplied from the outside and during the power failure period. No power is supplied when waiting for an incoming call,
Since the power is supplied only during a certain period when the line control of the dial-in service is executed when an incoming call is received during the power outage, the line control of the dial-in service is executed even during a power failure. It becomes possible to easily answer a call and make a call, and the battery is designed to supply power to the communication terminal device only during the period when line control is executed when a call arrives. Therefore, it is possible to prevent the cost of the device from increasing and the size of the device from increasing.

According to the second aspect of the present invention, a plurality of telephones are provided, and the plurality of telephones are individually connected according to the extension designation received from the exchange side. Therefore, the device can be used more conveniently.

According to a third aspect of the present invention, when an incoming call arrives and the device goes off-hook before the device detects the incoming call and starts operation, the line control of a predetermined dial-in service is executed and the telephone set is Is controlled to the call state, the user's response operation becomes easy.

According to the present invention, when an incoming call is received during the power failure period and the extension designation received from the telephone office side is a facsimile machine, the incoming call is notified as a proxy operation and the telephone is put in the off-hook state to establish a call state. Since the control is performed as described above, the called-side user can notify the calling-side user that the data communication cannot be performed.

According to a fifth aspect of the present invention, means for presetting whether or not to execute the proxy operation is provided. When the proxy operation is not executed, the incoming call is not answered, and the communication fee is not charged to the other party. .

According to the sixth aspect of the present invention, the notification of the incoming call is made by ringing a buzzer that operates with a smaller amount of power than the ringing device built into the telephone, so the power consumption of the battery during a power failure is reduced. can do.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a functional block configuration diagram of the facsimile device.

FIG. 3 is an explanatory diagram of a communication procedure between a facsimile device and an exchange when receiving a call.

FIG. 4 is a flowchart showing a part of an incoming call operation of the facsimile device.

FIG. 5 is a flowchart showing another part of the incoming operation of the facsimile device.

[Explanation of symbols]

 1 Telephone line 2 Facsimile device 2a Facsimile communication means 2b Built-in telephone 2c Dial-in line control means 3 External telephone 4,223 Buzzer 201,211,214,217 DC detection circuit 202 Modem 203 Polarity inversion detection circuit 204 Scanner 205 Plotter 206 Operation Display unit 207 Memory 208, 219 Ringing detection circuit 209 DC supply circuit 210 Telephone drive circuit 212 Telephone circuit 213 Handset 215 Smoothing circuit 216 DTMF detection circuit 218 DC loop closure circuit 220 Battery 221 Power failure detection circuit 222 Operation unit 224 System control unit 225 Dialer CPU S1, S2 switching circuit S4, S6 switch S5 hook switch

Claims (6)

[Claims] 1. A line control of dial-in service is executed when an incoming call arrives while operating from a power supply supplied from the outside, and a data communication operation of a communication terminal device is activated or a telephone is executed according to an extension designation received from a switching center side. In a dial-in line connection method of a communication terminal device for notifying an incoming call and controlling a call state by off-hook of a built-in telephone, a battery for supplying an operating power source separate from the above-mentioned power source supplied from the outside is provided, and from the battery Power is not supplied to the communication terminal device during normal operation of the power supply and during standby for incoming calls during a power outage, but power is supplied only during a certain period when the line control of the dial-in service is executed when a call is received during a power outage. A dial-in line connection method for a communication terminal device, comprising: 2. The dial-in line connection method for a communication terminal device according to claim 1, wherein the plurality of telephones are provided, and the plurality of telephones are individually connected according to an extension designation received from the exchange side. 3. When an incoming call is received, the device is off-hook before the device detects the incoming call and starts operation.
2. The line control of the dial-in service is executed to control the telephone to a call state.
A dial-in line connection method for the communication terminal device described. 4. When an incoming call is received during a power outage of the power source and the extension is designated as a communication terminal device, an incoming call is notified as a proxy operation to control the call state by off-hook of a built-in telephone. The dial-in line connection method for a communication terminal device according to claim 1, characterized in that. 5. The communication terminal apparatus according to claim 1, further comprising means for presetting whether or not to execute the proxy operation, and not responding to an incoming call when the proxy operation is not executed. Dial-in line connection method. 6. The notification of the incoming call is performed by ringing a buzzer that operates with less power than a ringing device built in the telephone.
A dial-in line connection method for the communication terminal device described.