JP2000022847A - Ringing control system for outside telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an operator from failing to hear the ringing of a speaker and from being unconscious of the reception of an incoming signal even if an outside telephone set is apart from a line control part 3 and he is on the side of the outside telephone set. SOLUTION: The ringing device 1 of an outside telephone set 2 is provided between the outside telephone set 2 and a line control part 3. When the line control part 3 receives an incoming signal, a relay RL1 provided in the line control part 3 switches the path of the incoming signal, which is connected to the outside telephone set 2, to a MODEM control part 36. While the MODEM control part 36 identifies the purpose of the incoming signal, a ringing circuit block 14 switches a relay RL2, prescribed ringing power P0 is applied to the outside telephone set 2 and the outside telephone set 2 is rung.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ringing device for an external telephone which is added to a facsimile machine or the like.

[0002]

2. Description of the Related Art For example, when an external telephone is added to a facsimile apparatus, the external telephone is connected to a line control unit of the facsimile apparatus. Facsimile machine is TEL
In the (call) / FAX (communication) automatic switching mode, when the line control unit receives an incoming signal from the calling station, the line control unit changes the path of the incoming signal connected to the external telephone to the line. Switch to the modem control unit provided inside the control unit. The modem control unit accepts a control signal from the calling station and identifies whether the purpose is a communication purpose or a fax communication purpose. During that time, a speaker provided in the line control unit sounds in place of the external telephone to notify the operator that there is an incoming call.

[0003]

However, the above-mentioned conventional techniques have the following problems to be solved. That is, it is assumed that the external telephone is connected to the line control unit of the facsimile apparatus via a long cord from a considerable distance. Further assume that the operator is away from the facsimile machine and is at the external telephone. In this case, after detecting the incoming signal, the external telephone does not ring, and the operator misses the sound of the speaker, so that the operator does not notice that there is an incoming call from the calling station. In this case, when the other party is for the purpose of talking, there is a problem that the operator does not notice the incoming call and cannot talk with the other party.

[0004]

The present invention adopts the following constitution in order to solve the above points. <Configuration 1> A line control unit that controls the line connection of a terminal having a communication function, an external telephone that shares a line with the terminal, and an external telephone that is inserted between the external telephone and the line control unit. A ringing device, the ringing device includes a ringing power supply unit for ringing an external telephone, the ringing power supply unit is connected to the external telephone via a relay, the relay, the relay A ringing power supply unit is connected to an external telephone according to a ringing control signal output when the line control unit receives an incoming signal, and the line control unit identifies whether the line control unit is for communication or communication, and then outputs the signal. A ring control system for an external telephone, wherein a ring power supply unit and an external telephone are separated by a ring control signal.

<Structure 2> A sound control system for an external telephone according to Structure 1, wherein the sound control signal is constituted by a single tone signal.

<Structure 3> In the sound control system for an external telephone according to structure 1, the sound control signal is multi-frequency (D
A ring control system for an external telephone, comprising a TMF signal.

<Structure 4> In the sound control system for an external telephone according to structure 1, the relay disconnects the ring power supply unit from the external telephone and connects the external telephone to the line control unit. With the external telephone and the power supply unit connected,
When the external telephone is hooked up, the relay disconnects the ring power supply unit from the external telephone and connects the external telephone to a line control unit. system.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <Configuration of Specific Example 1> In order to solve the above-mentioned problem, in the present invention, a ringing device of an external telephone is inserted between the external telephone and a line control unit. The line control unit controls line connection of a terminal having a communication function. An external telephone is a telephone that shares a line with a terminal. Here, according to the present invention, the ringing device rings the external telephone while the line control unit receives the control signal from the calling station and identifies the purpose of the incoming signal.

The ringing device includes a ringing power source for ringing the external telephone. This ringing power supply is connected to the external telephone via a relay. This relay connects a ring power source to an external telephone according to a ring control signal output when the line control unit receives the incoming signal, and outputs a ring control signal output after the line control unit identifies the purpose of the incoming signal. Disconnects the ringing power supply from the external telephone. Subsequent operations are the same as in the past.

[0010] In this way, the external telephone can be sounded at least for a few seconds after the incoming call to notify the operator of the incoming call. In order to have such a function,
The ringing device of the external telephone according to the specific example 1 is configured as follows.

FIG. 1 is a block diagram of the first embodiment. From FIG. 1, the ringing device 1 of the external telephone according to the specific example 1 is
A control unit 11, a tone detector 12, a sounding circuit block 14, a ROM / RAM 15, a power supply unit 16,
A relay RL2 is provided.

The control unit 11 is a ringing device 1 for an external telephone.
An arithmetic element that controls the whole. Usually one-chip CPU
(Arithmetic element). Tone detector 12
Is a part which receives a predetermined signal from the line control unit 3, converts it into a digital signal, and transfers it to the control unit 11.
Further, the tone detector 12 has a configuration described below.

FIG. 2 is a configuration diagram of the tone detector. The tone detector 12 includes an operational amplifier 21 and a transistor 2
2, R1, R2, R3, R4, four resistors, D1,
D2, two diodes and a capacitor C are provided. This tone detector performs half-wave rectification of the received signal by an operational amplifier 21 and further outputs the half-wave rectified output to a transistor 22.
Amplify until the collector current is saturated. as a result,
The received signal is digitally converted.

Returning to FIG. 1, the sounding circuit block 14
This part detects hookup of the ringing external telephone 2 and transfers a hookup detection signal F1 to the control unit 11. It is also a part that receives the ringing control signal R1 from the control unit 11 and controls on / off of the relay RL2.
In this specific example, the function of transferring the hookup detection signal F1 to the control unit 11 and the function of controlling ON / OFF of the relay RL2 are both provided. However, both functions may be configured as separate blocks.

The ROM / RAM 15 is connected to the bus of the control unit 11 and stores a control program for the entire ringing device 1 of the external telephone. Power supply unit 16
Is a portion for supplying a power supply voltage + 5V of the ringing device 1 of the external telephone and a ringing power supply P0 required for ringing of the external telephone 2, for example, + 24V, 150V.

Next, a description will be given of a configuration of the line controller 3 which receives an incoming signal from the outside and sends a predetermined signal to the ringing device 1 of the external telephone. This line control unit 3
Is a part of the FAX machine body. As shown in FIG. 1, the line control unit 3 includes a hookup detector 31 and an RI detector 32.
, Transformer 33, transmission amplifier 34, reception amplifier 3
5, a modem control unit 36, a speaker driver 37,
I / O port 38, speaker 39, main CPU 4
0 and a main ROM / RAM 41. The hookup detector 31 is a part that detects a hookup of the external telephone 2 and transfers a hookup detection signal F2 to the main CPU 40 via the I / O port 38.

The transformer 33 is an insulating transformer for transferring a signal received from the outside to the modem control unit 36. Further, it is an insulating transformer for transferring a predetermined signal transmitted by the modem control unit 36 to the ringing device 1 of the external telephone. The transmission amplifier 34 is a buffer amplifier that amplifies a predetermined signal transmitted by the modem control unit 36. The receiving amplifier 35
This is a buffer amplifier that amplifies a signal received from the outside.

The modem control unit 36 converts a signal received from the outside via the receiving amplifier 35 into a digital signal and transfers the digital signal to the main CPU 40. It is also a part that receives a digital signal from the main CPU 40, converts it into a predetermined analog signal, and transfers it to the ringing device 1 of the external telephone.

The speaker driver 37 has an I / O port 3
8 is a part that receives the ringing control signal R2 from the main CPU 40 via the controller 8 and drives the speaker 39. The I / O port 38 is a connection unit for inputting and outputting various signals to and from the main CPU 40. The speaker 39 is an electroacoustic conversion unit that is sounded by driving the speaker driver 37.

The main CPU 40 is an arithmetic element that controls the entire line control unit 3. Main ROM / RAM41
Is connected to the bus of the main CPU 40 and
This is the part where the control program for controlling the whole is stored.

<Operation of Embodiment 1> FIG. 3 is an explanatory diagram of the operation of Embodiment 1. The operation of the ringing device of the external telephone according to the specific example 1 will be described with reference to FIG.
Steps up to 5 will be described in the order of operation. The operation of the line controller 3 will also be described. As a prerequisite, the facsimile apparatus is in a standby state in which the relay RL1 and the relay R
L2 is both connected to the contact a.

S1. Start Power is applied to the facsimile machine and the machine enters a standby state. S2. Missed call? It is determined whether an incoming signal has arrived at the line connection terminals L1 and L2 of the line controller 3.

S3. Line capture (RL1 → b) When an incoming signal arrives at L1, L2, the RI detector 32 outputs a signal RI. The main CPU 40 receives this signal RI via the I / O port 38. Main CP
U40 connects relay RL1 to b according to main ROM / RAM41. As a result, the line is captured, and the modem control unit 36 completes preparations for receiving a signal from the line.

S4. CNG detection timer (To1) set The main CPU 40 detects and determines the CNG signal.
Set the detection time timer (To1). Where CN
The G (Calling Tone) signal is a signal representing a non-voice terminal defined in the ITU recommendation. It consists of ON section 0.5Sec, OFF section 3Sec, and ON section
A sine wave of 1100 Hz is transmitted in the section. The CNG signal is a signal sent from the calling station when the calling station is for communication purposes.

S5. Speaker / external telephone ringing start The main CPU 40 sends a ringing control signal R2 via the I / O port 38 and the speaker driver 37 to ring the speaker 39 in order to notify the operator that an incoming signal has arrived from outside. Let it. At the same time, the ringing control signal R2
The modem control unit 36 that has received the signal transmits a single tone of, for example, 2100 Hz to the tone detector 12 via the transmission amplifier 34, for example, for 300 mSec. The tone detector 12 receives the single tone of 2100 Hz and 300 mSec, converts the single tone into a tone detection signal T1, and then causes the control unit 11 to input the interrupt. Control unit 11
When the tone detection signal T1 is received, the ROM /
The sound control signal R1 is transferred to the sound circuit block 14 according to the program stored in the RAM 15. The ringing circuit block 14 connects the relay RL2 to the point b when the ringing control signal R1 is received.
Sends the ringing power supply P0 to the external telephone 2 to ring the external telephone 2.

S6. CNG detection? Here, it is determined whether or not the line control unit 3 has detected a CNG signal. When the CNG signal is detected, the subsequent operation proceeds to the start of the communication operation. The operation proceeds to S12. S12. Speaker / External Phone Ringing Stop Main CPU 40 includes receiving amplifier 35, modem control unit 3
6 when a CNG signal is detected via I / O port 3
8. The sound control signal R2 is transmitted through the speaker driver 37 to stop the sound of the speaker 39.

At the same time, the modem control unit 36 that has received the ringing control signal R2 sends a single tone of, for example, 1500 Hz to the tone detector 12 via the transmission amplifier 34, for example, for 300 mSec. The tone detector 12 receives the single tone of 1500 Hz and 300 mSec, converts the single tone into a tone detection signal T2, and causes the control unit 11 to input the interrupt. When the controller 11 receives the tone detection signal T2, the controller 11 reads the ROM / RAM 15
According to the program stored in the
1 is transferred to the sounding circuit block 14. When receiving the ringing control signal R1, the ringing circuit block 14 connects the relay RL2 to the point a, stops sending the ringing power P0 from the power supply unit 16 to the external telephone 2, and sets the external telephone 2
Stop ringing.

S13. Start of communication operation The line control unit 3 controls a called terminal identification signal (CED) and a digital identification signal (DI) specified in the ITU recommendation.
S), a non-standard function identification signal (NSF) or the like is transmitted to the line to start a communication operation.

Next, at S6. CNG detection? And the line control unit 3
Does not detect the CNG signal.
In this case, the process proceeds to S7. S7. (To1) Timeout? It is assumed that the operator hooks up the external telephone 2 before the CNG detection timer set in S4 times out. At this time, the operation proceeds to S9. S8. Is there a hookup? The ringing circuit block 14 detects that the external telephone 2 is hooked up via the relay RL2.

S9. Speaker / External Phone Ringing Stop The ringing circuit block 14 sends a hookup detection signal F1 to the control unit 1 when detecting hookup of the external telephone 2.
Transfer to 1. When receiving the hookup detection signal F1, the control unit 11 transfers the ringing control signal R1 to the ringing circuit block 14 according to the program stored in the ROM / RAM 15. The ringing circuit block 14
When the ringing control signal R1 is received, the relay RL2 is set to a
Then, the transmission of the ringing power P0 from the power supply unit 16 to the external telephone 2 is stopped, and the ringing of the external telephone 2 is stopped. At the same time, the hook-up detector 31 is connected to the relay RL.
Since hook 2 is connected to point a, hookup of external telephone 2 is detected, and hookup detection signal F2 is transferred to main CPU 40 via I / O port 38. When the main CPU 40 receives the hook-up detection signal F2, the main CPU 40 transmits a sound control signal R2 via the I / O port 38 and the speaker driver 37 to stop the sound of the speaker 39.

S10. Line Switching (RL1 → a) When the main CPU 40 receives the hookup detection signal F2, it connects the relay RL1 to a according to a program stored in the main ROM / RAM 41.
As a result, the line is switched, and the communication preparation between the outside and the external telephone 2 is completed.

S11. Call start A call starts between the outside and the external telephone 2. Then S
7. (To1) Timeout? Assume that the external telephone 2 is not hooked up until the CNG detection timer set in S4 times out. At this time, the operation proceeds to S14.

S14. The main CPU 40 stops the sound of the speaker / external telephone when the timeout occurs.
According to the program stored in the M / RAM 41, I
A sound control signal R2 is transmitted via the / O port 38 and the speaker driver 37 to stop the sound of the speaker 39. At the same time, the modem control unit 36, which has received the ringing control signal R2, supplies a single tone of, for example, 1500 Hz to the tone detector 12 via the transmission amplifier 34, for example, 3 tones.
00mSec is sent. The tone detector 12 uses this 15
Accepting a single tone of 00Hz, 300mSec,
After digital conversion into a tone detection signal T2, the control unit 1
Make interrupt input to 1. When receiving the tone detection signal T2, the control section 11 transfers the ringing control signal R1 to the ringing circuit block 14 in accordance with the program stored in the ROM / RAM 15. Ringing circuit block 14
When this ringing control signal R1 is received, the relay RL2
Is connected to point a, the transmission of the ringing power P0 from the power supply unit 16 to the external telephone 2 is stopped, and the ringing of the external telephone 2 is stopped.

S15. Line release (RL1 → a) The main CPU 40 continues the main ROM / RA
Relay RL according to the program stored in M41
1 is connected to a. As a result, the operation is in the standby state S
Return to immediately after 1. As described above, the present invention is limited to the facsimile machine, but the present invention is not limited to the facsimile machine. The present invention can be widely applied to, for example, a composite terminal device (a device having a facsimile function, a printer function, a copy function, etc.) connected to a line and having a connection terminal for an external telephone.

<Effect of Specific Example 1> The following effects can be obtained by interposing the ringing device 1 of the external telephone according to this specific example between the external telephone 2 and the line control unit 3. 1. If the external telephone is connected to the facsimile machine via a long cord, and furthermore, assuming that the operator is away from the facsimile machine and was at the side of the external telephone,
The user does not miss the sound of the speaker and is unaware that the incoming signal has been received.

2. The ringing device 1 for an external telephone according to this specific example can be realized with an inexpensive circuit configuration, so that an increase in cost can be minimized.

3. The facsimile apparatus corresponding to the ringing apparatus 1 of the external telephone according to this embodiment can be easily realized only by changing a program, and is useful for improving the performance of the facsimile apparatus.

<Configuration of Specific Example 2> In specific example 1, when the modem control unit 36 (FIG. 1) receives the ringing control signal R2 from the main CPU 40 (FIG. 1), the modem control unit 36 (FIG. 1) responds according to the control.
100Hz, 300mSec and 1500Hz, 300m
Two single tones of Sec were sent to the tone detector 12 (FIG. 1). The tone detector 12 (FIG. 1) converts this single tone into a digital signal and transfers it to the control unit 11 (FIG. 1). In the specific example 2, the modem control unit is a main CPU.
When the ringing control signal R2 is received from the controller, two types of multi-frequency signals (DTMF) corresponding to, for example, a numeric signal (*, 1) or a numeric signal (#, 1) are used instead of the two types of single tone. : Dual Tone Multi-Fre
quency) signal. When the DTMF detector arranged in place of the tone detector 12 (FIG. 1) receives the two kinds of multi-frequency (DTMF) signals,
The signals are converted into the two types of numeric signals and transferred to the control unit. Other configurations are exactly the same as those of the first embodiment. Here, the numeric signal is equivalent to a push button of a push button telephone,
The multi-frequency (DTMF) signal is equivalent to a composite signal defined corresponding to the numeric signal. The normal modem control unit has this function.

FIG. 4 is a block diagram of the second embodiment. FIG. 4 shows that the ringing device 20 of the external telephone according to the second embodiment is provided.
Is a control unit 11, a sounding circuit block 14, a ROM /
RAM 15, power supply unit 16, relays RL2, D
A TMF detector 25.

The control unit 11 controls the ringing device 1 of the external telephone.
An arithmetic element that controls the whole. Usually one-chip CPU
(Arithmetic element). Ringing circuit block 1
Reference numeral 4 denotes a part that detects hookup of the external telephone 2 that is ringing and transfers a hookup detection signal F1 to the control unit 11. It is also a part that receives the ringing control signal R1 from the control unit 11 and controls on / off of the relay RL2.

The ROM / RAM 15 is connected to the bus of the control unit 11 and stores a control program for the entire ringing device 1 of the external telephone. Power supply unit 16
Is a portion for supplying a power supply voltage + 5V of the ringing device 1 of the external telephone and a ringing power supply P0 required for ringing of the external telephone 2, for example, + 24V, 150V.
The above configuration is exactly the same as in the first embodiment.

The DTMF detector 25 is a part that receives a multi-frequency (DTMF) signal from the modem control unit 36 inside the line control unit 3 and converts it into a predetermined numeric signal. It is also possible to use a commercially available DTMF receiver as it is.

<Operation of Specific Example 2> Referring to FIG. 3 and FIG.
Only steps different from the first example will be described. Steps S1 to S4 are the same as in the first embodiment. S5. Speaker / External Phone Ringing Start To notify the operator that an incoming signal has arrived from outside, the main CPU 40 sends out a ringing control signal R2 via the I / O port 38 and the speaker driver 37 to switch the speaker 39. Let it ring. At the same time, the ringing control signal R
The modem control unit 36 that has received the “2” transmits, for example, a multi-frequency (DTMF) signal corresponding to the numeric signal (*, 1) to the DTMF detector 25 via the transmission amplifier 34. D
The TMF detector 25 receives the multi-frequency (DTMF) signal, converts it into a numeric signal (*, 1),
Input to the 1 bus. When receiving the numeric signal (*, 1), the control unit 11 transfers the ringing control signal R1 to the ringing circuit block 14 in accordance with the program stored in the ROM / RAM 15. Ringing circuit block 14
When this ringing control signal R1 is received, the relay RL2
To the point b, and the power supply unit 16
To the external telephone 2 to make the external telephone 2 ring.

S6. CNG detection? Here, it is determined whether or not the line control unit 3 has detected a CNG signal. When the CNG signal is detected, the subsequent operation proceeds to the start of the communication operation. The operation proceeds to S12.

S12. Speaker / External Phone Ringing Stop Main CPU 40 includes receiving amplifier 35, modem control unit 3
I / O port 3 when CNG signal is received via
8. The sound control signal R2 is transmitted through the speaker driver 37 to stop the sound of the speaker 39. At the same time, the modem control unit 36, which has received the ringing control signal R2,
Via the transmission amplifier 34, for example, a numeric signal (#, 1)
Multi-frequency (DTMF) signal corresponding to DTMF detector 2
Send to 5.

The DTMF detector 25 uses the multi-frequency signal (DT
After receiving the MF) signal and converting it into a numeric signal (#, 1), it is input to the control unit 11. When the control unit 11 receives the numeral signal (#, 1), the control unit 11
According to the program stored in the
1 is transferred to the sounding circuit block 14. When receiving the ringing control signal R1, the ringing circuit block 14 connects the relay RL2 to the point a, stops sending the ringing power P0 from the power supply unit 16 to the external telephone 2, and sets the external telephone 2
Stop ringing. S13. Start of communication operation The line control unit 3 controls a called terminal identification signal (CED) and a digital identification signal (DI) specified in the ITU recommendation.
S), a non-standard function identification signal (NSF) or the like is transmitted to the line to start a communication operation.

Next, at S6. CNG detection? And the line control unit 3
Does not detect the CNG signal.
In this case, the process proceeds to S7. Steps S7 to S10 are the same as in the first embodiment. S11. Call start A call starts between the outside and the external telephone 2. Then S
7. (To1) Timeout? Assume that the external telephone 2 is not hooked up until the CNG detection timer set in S4 times out. At this time, the operation proceeds to S14.

S14. The main CPU 40 stops the sound of the speaker / external telephone when the timeout occurs.
According to the program stored in the M / RAM 41, I
A sound control signal R2 is transmitted via the / O port 38 and the speaker driver 37 to stop the sound of the speaker 39. At the same time, the modem control unit 36 that has received the ringing control signal R2 outputs, for example, a multi-frequency (DTMF) signal corresponding to the numerical signal (#, 1) to the D through the transmission amplifier 34.
It is sent to the TMF detector 25. The DTMF detector 25 is
The multi-frequency (DTMF) signal is received, converted into a numeric signal (#, 1), and then input to the control unit 11. When the control unit 11 receives the numeric signal (#, 1),
The sound control signal R1 is transferred to the sound circuit block 14 in accordance with the program stored in the ROM / RAM 15. When the ringing circuit block 14 receives the ringing control signal R1, the relay RL2 is connected to the point a, the transmission of the ringing power P0 from the power supply unit 16 to the external telephone 2 is stopped, and the ringing of the external telephone 2 is stopped. Let it.

S15. Line release (RL1 → a) The main CPU 40 continues the main ROM / RA
Relay RL according to the program stored in M41
1 is connected to a. As a result, the operation is in the standby state S
Return to immediately after 1.

<Effect of Specific Example 2> As described above,
The tone detector 12 in FIG.
The following effects are obtained by replacing the detector 25. 1. Since sound control is performed by a combination of DTMF signals,
More reliable start and stop of the sound can be controlled. In the specific example 2, the ringing control signal is generated by combining two DTMF signals, but the number of combinations of the DTMF signals is reduced to three.
Or four. 2. Since a commercially available DTMF receiver can be employed as it is, an inexpensive circuit configuration is possible.

[Brief description of the drawings]

FIG. 1 is a block diagram of a specific example 1.

FIG. 2 is a configuration diagram of a tone detector.

FIG. 3 is an operation explanatory diagram of a specific example 1.

FIG. 4 is a block diagram of a specific example 2;

[Explanation of symbols]

 Reference Signs List 1 ringing device of external telephone 2 external telephone 3 line controller 11 control unit 12 tone detector 14 ringing circuit block 15 ROM / RAM 16 power supply unit 31 hookup detector 32 RI detector 33 transformer 34 transmission amplifier 35 reception amplifier 36 Modem control unit 37 Speaker driver 38 I / O port 39 Speaker 40 Main CPU 41 Main ROM / RAM RL2 Relay

Claims (4)

[Claims] 1. A line controller for controlling a line connection of a terminal having a communication function; an external telephone having a common line with the terminal; and an external telephone inserted between the external telephone and the line controller. The ringing device comprises a ringing power supply unit for ringing an external telephone, the ringing power supply unit is connected to the external telephone via a relay, the relay, A ringing control signal output when the line control unit accepts the incoming signal connects the ringing power supply unit to an external telephone, and outputs after identifying whether the line control unit is for communication or communication. A ring control system for an external telephone, wherein a ring power supply unit and an external telephone are separated by a ring control signal. 2. The sound control system for an external telephone according to claim 1, wherein the sound control signal is constituted by a single tone signal. 3. The sound control system for an external telephone according to claim 1, wherein the sound control signal is constituted by a multi-frequency (DTMF) signal. 4. The ring control system for an external telephone according to claim 1, wherein the relay has a function of disconnecting the ring power supply unit from the external telephone and connecting the external telephone to a line control unit. When the external telephone is hooked up in a state where the external telephone and the power supply unit are connected, the relay disconnects the ringing power supply unit and the external telephone, and A ring control system for an external telephone, which is connected to a line control unit.