JP2753188B2 - Wired communication terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wired communication terminal such as a telephone and a facsimile machine connected to a telephone line by wire.

[0002]

2. Description of the Related Art Conventionally, telephones that can be connected to a 10PPS / 20PPS dial pulse (hereinafter abbreviated as DP) type telephone line and a push-button dial (hereinafter abbreviated as PB) type telephone line are based on a 10PPS / 20PPS DP system. P
The switch has a B-type changeover switch, and the user recognizes the line type of the telephone line connected to the telephone and sets a predetermined dial mode by manually operating the changeover switch.

However, when the user sets the dial mode by manually operating the changeover switch as described above, the user may make a mistake in selecting the dial mode, and the manual operation itself for selecting the dial mode may be performed. It was annoying. Therefore, Japanese Patent Application Laid-Open No. Hei 3-132
As shown in Japanese Patent Publication No. 40, the telephone line is captured and dial pulse (DP) or dual tone multi-frequency signal (DT) is acquired.
MF) and automatically sets the dial mode for the line depending on whether or not the arrival of dial tone (DT) from the line due to this signal has been stopped.

[0004]

However, in the above conventional apparatus, it is possible to determine whether the connected telephone line is a dial line or a push line, but after it is determined that the telephone line is a dial line, the line is switched to a dial line. There was a problem that it was not possible to determine whether it was 10 PPS or 20 PPS.

In a wired communication terminal used in a company or the like, a wired communication terminal is not directly connected to an external telephone line but is connected to a private branch exchange, and the private branch exchange is connected to an external telephone line. There is something. However, in the above conventional apparatus, the automatic setting of the dial mode is limited only when the external telephone line is directly connected to the wired communication terminal, and the private branch exchange is interposed between the external telephone line and the external telephone line as described above. Also, the automatic setting of the dial mode cannot be performed in the wired communication terminal.

In some private branch exchanges, even if the external telephone line is in the DP system, the connected wired communication terminal can use both the DP system and the PB system. Is determined. in this case,
The PB method is more convenient because of the processing speed of the wired communication terminal. However, if the user does not know that the private branch exchange can use the wired communication terminal in the DP system or the PB system, the dial mode may be set in the DP system, and the performance of the wired communication terminal is maximized. There was a problem that it could not be used.

According to the present invention, 10 PPS and 20 PPS of the DP system are used.
The PPS can be reliably determined, and even when connected to an external telephone line via a private branch exchange, the dial mode can be automatically set, and both the DP method and the PB method can be used. An object of the present invention is to provide a wired communication terminal capable of preferentially selecting a PB scheme when it can be used.

[0008]

Means for Solving the Problems The present invention has been made for the purpose of solving the above problems, the wired communication terminal of claim 1, wherein automatically sets the dial mode corresponding to the connected telephone line And a dial tone detecting means for detecting the presence or absence of a dial tone from a telephone line, the signal sending means being capable of sending three types of dial pulses of 20PPS / 10PPS and a push button dial signal as selection signals. Storage means for storing the dial mode, and the three kinds of selection signals are sequentially transmitted from the signal transmission means in accordance with a predetermined order, and each time the selection signal is transmitted, the dial tone is detected by the dial tone detection means. to perform the detection, then, upon detecting the absence of dial tone, of the dispatched selected signals to those detection operation immediately before While Ru is provided and control means to be stored in said storage means dial mode is determined as the dialing mode of the connected telephone line, said control means, said
The sending order is as follows: dial pulse of 20PPS and push button.
After repeatedly sending the tongue dial signal two or more times,
The above signal is transmitted so as to transmit a dial pulse of 10 PPS.
It controls the sending means .

[0009]

[0010]

[0011]

[0012]

[0013]

Therefore, according to claim 1, wherein wired communications terminal, the start of automatic setting operation of the dial mode is instructed is <br/>, based on by that control the control means, 20PP from the signal sending means more than once in the order of two of the selection signals S dial pulse and the push button dial signal of a predetermined
With the above repeatedly sent, cracking line detection of dial tone by the dial tone detecting means <br/> degree to which the selection signal is transmitted, then, upon detecting the absence of dial tone, it sends to those detection operation immediately before While the dial mode of the selected selection signal is determined to be the dial mode of the connected telephone line and stored in the storage means, the dial pulse of 20 PPS and
Predetermine two kinds of selection signal of push button dial signal
Despite having repeatedly sent out two or more times according to the order
No dial tone by dial tone detection means
If not detected, a 10PPS die
And send the selection signal.
Each time the dial tone is detected by the dial tone detection means
Call, and then detects that there is no dial tone.
Of the selection signal sent immediately before the detection operation
Determines and stores the mode as the dial mode of the connected telephone line
Means that this wired communication terminal can be
Smell when connected to an external telephone line via a switchboard
However, the dial mode corresponding to the external telephone line can be automatically set.

[0014]

[0015]

[0016]

[0017]

[0018]

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

FIG. 1 is a block diagram showing an electrical configuration of a telephone according to an embodiment of the present invention. FIG. 2 is a flowchart showing control of a dial mode automatic setting operation. FIG. FIG. 4 is a block diagram showing an electric configuration of a telephone according to another embodiment of the present invention.

In FIG. 1, 1 is a telephone line, 2 is a line capture circuit for closing the telephone line 1 and forming a DC loop, 3
Is a communication circuit for making a call with the other party's telephone through the telephone line 1, 4 is a handset with a built-in microphone and earpiece, 5 is a DP system of 10PPS / 20PPS and P
A dial transmission circuit (signal transmission means) for transmitting a selection signal of the B system, 6 is an audible sound detection circuit for detecting an audible sound transmitted from a telephone line, 7 is an operation panel, and 8 is a dial mode automatic setting operation. Main control unit (control means), 9
Is an E ² PROM (non-volatile memory) that stores a dial mode registered by key input on the operation panel 7.

Further, the main control unit 8 supplies a signal to the line capturing circuit 2 when performing a dial operation to capture the telephone line 1 and also causes the dial transmitting circuit 5 to transmit a signal of 10 PPS / 20 PPS.
A dial transmission circuit driving unit 81 which provides a signal instructing dialing in one of the DP system and the PB system, and has a memory (storage means) not shown therein;
A dial tone detecting section (dial tone detecting means) 82 for detecting a dial tone from a signal of the audible sound detecting circuit 6
And an operation panel monitoring unit 83 that monitors the state of the operation panel 7 and supplies a signal to the dial transmission circuit driving unit 81, and reads and writes data from and to the E ² PROM based on a signal from the operation panel monitoring unit 83. E ² PROM
And a read / write unit 84.

The automatic dial mode setting operation of the telephone having the above configuration will be described with reference to the flowchart of FIG.

When the power of the telephone is turned on or the dial mode automatic setting operation is started, the dial transmission circuit driving section 81 supplies a signal to the line capturing circuit 2 to capture the line (step S1). When telephone line 1 is captured, telephone line 1
, A dial tone is transmitted, and the dial tone is input to the dial tone detecting unit 82 through the line capturing circuit 2, the communication circuit 3, and the audible sound detecting circuit 6. The dial tone detection unit 82 detects that a dial tone has been input, and sends a detection signal to the dial transmission circuit driving unit 81.

When the power is turned on in a state where the telephone line 1 is not connected to the telephone, the line capturing circuit 2
However, since the telephone line 1 is not connected, the telephone line 1 cannot be captured, and no dial tone is transmitted. For this reason, the dial tone is not detected by the dial tone detecting section 82 and no detection signal is sent to the dial oscillation circuit driving section 81. However, when the telephone line 1 is connected, the dial tone is sent out from the telephone line 1 and the dial tone is sent out. When the tone is detected by the dial tone detection unit 82, a detection signal is transmitted to the dial transmission circuit driving unit 81 (step S2).

The dial transmission circuit drive section 81 sends a control signal to the dial transmission circuit 5 based on the detection signal from the dial tone detection section 82 to dial "0" in the DP system of 20 PPS. Based on this control signal, "0" is dialed for the telephone line 1 by the DP method of 20 PPS (step S3).

At this time, if the line type of the telephone line 1 is 2
In the case of the DP system of 0PPS, the dial tone is not transmitted from the telephone line 1, and the detection signal from the dial tone detecting unit 82 disappears (step S4). Then, the dial tone transmission circuit driving unit 81 transmits a dial pulse by manual operation of the operation panel 7 after that, when the dial pulse is transmitted by 20PP.
The data is stored in a memory inside the dial tone transmission circuit driving unit 81 (not shown) so as to dial in the DP method of S (step S14).

If the dial tone from the telephone line 1 does not disappear, the dial transmission circuit drive section 81 sends a control signal to the dial transmission circuit 5 to dial "0" in the PB system, and the dial transmission circuit 5 Dials "0" to the telephone line 1 in the PB system based on the control signal (step S5).

At this time, if the line type of the telephone line 1 is P
In the case of the B method, the dial tone is no longer transmitted from the telephone line 1, and the detection signal from the dial tone detecting unit 82 disappears (step S6). Then, the dial tone transmission circuit driving section 81 stores in a memory inside the dial tone oscillation circuit driving section 81 (not shown) so that subsequent dialing is performed by the PB method (step S15).

If the dial tone has not disappeared, the process is executed again from step S3 in the flowchart of FIG. 2 (step S7). This is because if the telephone is not directly connected to the external telephone line but is connected to the external telephone line via the private branch exchange, the dial tone of the private branch exchange is detected when the line is seized in step S1. (Step S2). Therefore, the first step S3
Alternatively, even if "0" is dialed in step S5 and the dial modes match, the private branch exchange only connects the telephone set to the external telephone line, and the first step S5.
In either step 4 or step S6, the dial tone of the private branch exchange is changed to the dial tone of the external telephone line.

Thereafter, the second time is executed, so that "0" is dialed in step S3 or step S5, and if the dial modes match, the dial tone is turned off in step S4 or S6, and the dial transmission circuit driving unit 8 is operated in the same manner as described above.
20PP to the internal memory (not shown)
The data is stored so as to be performed by either the DP method or the PB method of S.

If the dial tone still does not disappear even after executing the above, it is considered that the line type is the DP system of 10 PPS, so that the telephone line is once released to perform the next operation, and the telephone line is captured again (step). S8). this is,
If the operation after step S9 is performed while the line is being captured, it takes about 26 seconds from the line capture (step S1) to the end of the operation. On the other hand, the external telephone line is dialed unless a valid dial is transmitted for about 20 seconds from the line capture. This is because transmission of the tone is stopped, a busy tone is transmitted, and subsequent dialing is not accepted, so that it is necessary to temporarily open the telephone line.

After releasing the line in step S8 and re-capturing the line, when a dial tone is detected, a signal is given from the dial tone detecting section 82 to the dial transmitting circuit driving section 81 (step S9). Dial transmission circuit driver 81
10P is sent to the dial transmission circuit 5 based on the detection signal.
A control signal is transmitted so as to dial "0" in the DP system of the PS, and the dial transmission circuit 5 dials "0" in the DP system of 10 PPS to the telephone line 1 based on the control signal (step S10). .

At this time, if the line type of the telephone line 1 is 1
In the case of the DP system of 0PPS, the dial tone is not transmitted from the telephone line 1, and the detection signal from the dial tone detecting unit 82 disappears (step S11). Then, when the dial tone transmission circuit driving unit 81 transmits a dial pulse by manual operation of the operation panel 7 thereafter, 10P
The data is stored in a memory inside the dial tone transmission circuit driving unit 81 (not shown) so as to dial in the DP DP system (step S16).

If the dial tone from the telephone line 1 has not disappeared, it is considered that the telephone is connected to the private branch exchange, and the process is executed again from step S10 (step S12).

If the dial mode is not set regardless of the execution of the above-mentioned operation, noise having the same component as the dial tone (noise near 400 Hz) exists on the telephone line 1 and the dial tone disappears. It is considered that it was not detected. In such a case, the DP system of 20 PPS which is currently used most is set (step S13).

When connected to a private branch exchange that can use either the DP system or the PB system, the PB
The method is set.

If it is determined in step S1 that the telephone line has been captured and that a dial tone has been detected in step S2, "0" is dialed in the DP system of 20 PPS in step S3. The private branch exchange stops the dial tone of the private branch exchange by dialing "0", connects the telephone set to the external telephone line, and transmits the dial tone from the external telephone line to the telephone set. Therefore, although the dial tone of the private branch exchange is not transmitted, the dial tone from the external telephone line is transmitted. In step S4, the dial tone does not disappear, and the process proceeds to step S5, where "PB" Dial "0".

At this time, this type of private branch exchange which can be used in both the DP system and the PB system converts "0" dialed in the PB system into the line type of the connected external telephone line (external system). D if the line type of the telephone line is DP
(To be converted to "0" in the P system), the dial tone is not transmitted from the external telephone line, and it is determined in step S6 that the dial tone has disappeared.
At 15, the dial mode of the telephone is set to the PB system.

Next, the operation of setting the dial mode by a manual operation of the user without using the automatic dial mode setting operation will be described.

When the user operates the operation panel 7 and inputs a dial mode corresponding to the connected telephone line 1, the operation panel monitoring unit 83 causes the dial oscillation circuit driving unit 81 and the E ² PROM read based on the input operation. An operation signal is sent to the light unit 84. Based on the operation signal, dialing circuit driving unit 81 stores the dial mode input from the operation panel 7 in an internal memory, also, E ²
The PROM read / write unit 84 writes the dial mode input from the operation panel 7 into the E ² PROM 9. As described above, the dial mode is registered in the E ² PROM 9 only when the dial mode is manually set.

Next, the operation at the start of the dial mode automatic setting will be described with reference to the flowchart of FIG.

When power is supplied to the telephone,
When the reset operation is performed by the operation panel 7, each part of the circuit is reset, and the dial transmission circuit driving unit 81
Is written into an internal memory (not shown) indicating that dial mode automatic setting is to be started.

Then, in step S21, it is determined whether the telephone is in a power outage state or an energized state. At this time,
If the power supply to the telephone is only the power supplied from the telephone line 1, it is determined that a power failure has occurred, and the process proceeds to step S22. Thus, from step S21 to step S
22, the dial transmission circuit driving unit 8
1 stores data indicating that dial mode automatic setting is to be started, and data indicating that dial mode automatic setting is to be started is stored in the memory inside the dial transmission circuit driving unit 81 as described above. In this case, a power failure operation is performed with a dial pulse of 20 PPS, which is currently most frequently used as a general telephone line. This power failure operation means that when the main power of the telephone is turned off,
Only the normal telephone operation is performed by the power supplied from the telephone line 1, and the memory inside the dial transmission circuit driving unit 81 is backed up by the power supplied from the telephone line 1.

When it is determined in step S23 that the telephone has returned from the power failure state to the power-on state, or
If it is determined that a current state in step S21 advances to step S24, controls the E ² PROM read-write unit 84 to read the dial mode where the E ² PROM9. In step S25, the read contents of the dial mode data are confirmed. If the data indicates any of the 10PPS DP system, the 20PPS DP system, and the PB system, it means that the user has previously registered. In step S26, the dial mode of the telephone is set to the contents of the E ² PROM 9. If the content of the data indicates the automatic dial mode setting, the process proceeds to step S27.

In step S27, the contents of the dial mode data stored in the memory within the dial transmission circuit drive section 81 are confirmed.
If it indicates either the DP system or the PB system of the PS, after reset, the dial mode automatic setting operation has been performed, and the process proceeds to step S28, where the dial mode of the telephone is set to the dial transmission circuit. Drive unit 81
Set to the contents of the internal memory. If the content of the data indicates the dial mode automatic setting, the process proceeds to step S29.

In step S29, the dial mode automatic setting operation is started, and when the dial mode of the telephone is determined, the process proceeds to step S30, and the result is stored in a memory in the dial transmission circuit driving unit 81, and
The dial mode of the telephone is set based on this determination result.

Then, steps S26 and S28
Alternatively, when the dial mode of the telephone is set in step S30, the process proceeds to step S31, where it is determined whether the power is in a power failure state or a power-on state. If it is determined that the power is out, the process proceeds to step S2, where a power outage operation is performed in the set dial mode. If it is determined that the power is on, the process proceeds to step S32.

In step S32, it is determined whether the operation panel 7 has been operated. If it is determined that the operation panel 7 has been operated, the process proceeds to step S33, where the operation command of the operation panel 7 is the activation of the dial mode automatic setting operation. Or
It is determined whether the dial mode is manually set. When it is determined in step S33 that the operation command on the operation panel 7 is the activation of the dial mode automatic setting operation, the process proceeds to step S29, where the dial mode automatic setting operation is performed, and the operation command is transmitted to the dial mode. If it is determined that the mode is manually set, the process proceeds to step S34, where the dial mode corresponding to the operation of the operation panel 7 is written in the E ² PROM 9. Then, after the dial mode is written in the EEPROM ² in step S34, the process proceeds to step S31.

If it is determined in step S32 that the operation panel 7 has not been operated, the flow shifts to step S35, where other energizing operations are performed, and then the flow shifts to step S31.

In the above embodiment, when the dial mode is manually set by operating the operation panel 7, the set dial mode is stored in the memory inside the dial oscillation circuit driving section 81, and is also stored in the E ² PROM 9. Written and reset, dial mode is E ² P
The dial mode set in the ROM is set. Therefore, when the dial mode of the telephone line is changed after the manual setting of the dial mode, it is necessary to set the dial mode again by a manual operation.

Hereinafter, a telephone according to another embodiment of the present invention will be described with reference to FIG. Note that, in FIG. 4, portions common to FIG. 1 are denoted by common reference numerals.

In FIG. 4, reference numeral 11 denotes a main control unit (control means) for controlling a dial mode automatic setting operation, and reference numeral 12 denotes when a power supply from the power supply circuit 13 is stopped for a predetermined time or more.
A reset circuit that sends a reset signal to the main control unit 11.

Note that the main control unit 11 supplies a signal to the line capturing circuit 2 when dialing, captures the telephone line 1, and causes the dial transmitting circuit 5 to transmit 10 PPS / 20 PP.
A dial transmission circuit driving unit 11a which gives a signal instructing dialing in either the DP system or the PB system of S and has a memory (storage means) not shown therein.
And a dial tone detecting section (dial tone detecting means) for detecting a dial tone from a signal of the audible sound detecting circuit 6
11b and an operation panel monitoring unit 11c that monitors the state of the operation panel 7 and provides a signal to the dial transmission circuit driving unit 11a.
And a reset detection unit 11d that resets the telephone circuit based on a signal from the operation panel monitoring unit 11c and a reset signal from the reset circuit 12. The reset circuit 12 includes a resistor and a capacitor, and is configured to transmit a reset signal when the electric charge charged in the capacitor becomes less than a predetermined value.

In the telephone constructed as described above, the power supply from the power supply circuit 13 is stopped when the power is switched from the energized state to the power failure state, and accordingly, the capacitor constituting the reset circuit 12 is discharged. The charge that is charged gradually decreases.

Before the predetermined time elapses, that is, before the electric charge charged in the capacitor becomes less than the predetermined value by discharging, the power supply recovers from the power failure state and the power supply from the power supply circuit 13 is resumed. There is no reset on the telephone circuit, so the dial oscillation circuit drive 11a
The dial mode stored in the internal memory is set as the dial mode of the telephone.

When a predetermined time has elapsed and the electric charge charged in the capacitor has become less than a predetermined value due to discharge, a reset signal is sent from the reset circuit 12, and the reset signal detecting section 11d detects this reset signal.
A reset is applied to the telephone circuit, and the dial mode of the memory inside the dial oscillation circuit drive section 11a is erased. When the power is restored from the power failure state and the power supply from the power supply circuit 13 is resumed, the dial oscillation circuit driving unit 11
Since the dial mode is not stored in the internal memory a, the dial mode automatic setting operation is automatically started.

In the above embodiment, the counting of the predetermined time is performed by charging and discharging the capacitor. However, the present invention is not limited to this. For example, a timer circuit or the like using pulse transmission may be used.

In this embodiment, when a dial tone from a telephone line is detected even though a dial pulse of 20/10 PPS and a push-button dial are sequentially transmitted in the dial mode automatic setting operation, the most current telephone line is set. The dial mode is set to the dial pulse method of 20 PPS which is often used. However, the present invention is not limited to this. The dial mode may be set to another dial mode or dial transmission may not be performed.

[0059]

As described above, according to the first aspect of the present invention, a dial pulse and a push button diagram of 20 PPS are provided.
Two types of selection signals were repeatedly transmitted two or more times
Send 10PPS dial pulse later
External telephone call contest was directly connected by controlling
External telephone line connected via private branch exchange
In each case, maximize the capacity of the connected telephone line
The dial mode that can be utilized can be automatically set without fail .

[0060]

[0061]

[0062]

[0063]

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a dial mode automatic setting operation of the telephone.

FIG. 3 is a flowchart showing an operation at the time of starting a dial mode automatic setting operation of the telephone.

FIG. 4 is a block diagram showing an electrical configuration of a telephone according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Telephone line 2 Line capture circuit 3 Talking circuit 4 Handset 5 Dial oscillation circuit 6 Audible sound detection circuit 7 Operation panel 8 Main control section 9 E ² PEOM

Claims (1)

(57) [Claims] 1. A wired communication terminal for automatically setting a dial mode corresponding to a connection telephone line, comprising: a signal transmitting means capable of transmitting three types of dial pulses of 20 PPS / 10 PPS and a push button dial signal as selection signals. Dial tone detection means for detecting the presence or absence of a dial tone from a telephone line; storage means for storing a dial mode; and the signal transmission means for sequentially transmitting the three types of selection signals in a predetermined order. Each time the selection signal is transmitted, the dial tone is detected by the dial tone detecting means. Thereafter, when no dial tone is detected, the dial mode of the selection signal transmitted immediately before the detection operation is changed to the connection telephone mode. Control means for determining as a dial mode of the line and storing the same in the storage means; On the other hand, the control means controls the signal transmission means to transmit the dial pulse of 10 PPS after repeatedly transmitting the dial pulse of 20 PPS and the push button dial signal at least twice as the transmission order. Characteristic wired communication terminal.