JPH089013A - Telephone set - Google Patents

Abstract

PURPOSE:To discriminate a kind of a telephone line without providing a special circuit by detecting a dial tone with a voice detection circuit detecting a non- input of a voice signal to a recording and reproducing circuit so as to stop the recording. CONSTITUTION:A control circuit 1 discriminates a position of a dial signal setting switch 13 at application of power and closes a telephone line when the switch is thrown to the position of 'automatic'. Then a voice detection circuit 11 discriminates a dial tone from an exchange as a voice signal and outputs an H signal. The control circuit 1 detecting the signal controls a dial signal generating circuit 6 to output a dial pulse signal and discriminates an output signal from the voice detection circuit 11 after 2sec and discriminates the line to be the 20PPS mode when the signal is at L. Furthermore, the control circuit 1 outputs a tone dial signal when the output signal of the voice detection circuit 11 is at H and sets the mode to the tone dial mode when the output signal of the voice detection circuit 11 after 2sec is at L. Furthermore, the control circuit 1 sets the mode to the 10 or 20PPS mode depending on a reply of the dial pulse signal to be outputted when the output signal is at H.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone capable of switching between tone and pulse modes and automatically switching the mode setting according to the line to be connected.

[0002]

2. Description of the Related Art Conventionally, there are two types of tone signals and pulse signals for dial signals transmitted from a telephone depending on the type of telephone line, and a telephone is generally configured to be able to switch to both types.

However, in such a configuration, it is necessary for the user to set and use the tone / pulse mode depending on the type of line connected to the telephone. There was a problem that not only could not be effectively used, but the line connection might not be possible.

Therefore, as disclosed in, for example, Japanese Unexamined Patent Publication No. 5-130196, the signal (400 Hz) from the exchange when the dial signal is transmitted from the telephone itself is detected, and based on this, the telephone itself is detected. The type of dial signal to be sent is selected.

[0005]

However, the above structure has a drawback that the circuit structure is complicated because it requires a circuit for detecting a 400 Hz dial tone output from the exchange.

[0006]

A telephone according to the present invention comprises a dial transmitting means having a tone mode and a pulse mode, a recording means for recording a voice signal inputted through a telephone line, and a voice from the telephone line. The type of telephone line is determined based on the state of each telephone line after outputting a pulse signal to the telephone line by controlling the voice detecting means for detecting the presence or absence of a signal and the dial transmitting means, and outputting the tone signal. A tone mode or a pulse mode, and a control means for stopping the recording means when it is determined that the voice signal is “absent” based on the voice detecting means after the recording means is activated. In things,
The control means detects the state of the telephone line based on the output of the voice detection means.

[0007]

Since the present invention is configured as described above, the type of telephone line can be detected by the voice detecting means for controlling the operating state of the recording means.

[0008]

Embodiments of the present invention will be described with reference to the drawings.
(1) is a control circuit for controlling the entire telephone, which is composed of a microprocessor. Reference numeral (2) is a line connection circuit that connects the telephone line (L) and the speech network circuit (3) under the control of the control circuit (1).
(4) is a well-known handset including a receiving circuit and a transmitting circuit, and (5) is a hook detection circuit for detecting on-hook or off-hook of the handset, which is a control circuit for controlling an H or L signal corresponding to on-hook or off-hook. Send to 1). (6) is a dial signal generation circuit, which is a 20PPS pulse dial signal (outputs 20 pulses per second), 10PP
Either the S pulse dial signal (10 pulses output per second) or the tone dial signal is output under the control of the control circuit (1). (7) is an incoming call detection circuit for detecting an incoming call,
(8) is a recording / reproducing apparatus for recording / reproducing a message or the like from a caller for use as a so-called answering machine.
Voice signals are transmitted and received via the recording amplifier (9).
A switching circuit (10) connects either the handset (4) or the recording / reproducing amplifier (9) to the speech network circuit (3) under the control of the control circuit (1). (11) is a voice detection circuit such as LA8517M (manufactured by Sanyo Electric Co., Ltd.) that detects the presence or absence of a voice signal from the telephone line (L), and outputs an H signal when a voice signal of 300 Hz to 3 KHz is detected, When not detected, the L signal is output to the control circuit (1). (12) is a key circuit, a numeric keypad,
Includes home mode key and answering machine mode key. (13) is a dial signal setting switch for setting the type of dial signal.
It takes four positions of "PPS". When this switch is set to "automatic", the telephone set itself detects the type of telephone line and automatically sets the dial mode to match the type, as described later.

FIG. 2 is a flow chart showing a program of a main part of the initialization process, and FIG. 3 is a flow chart showing a program of a main part of the answering machine mode process.

Next, the operation of the above configuration will be described with reference to FIGS.

First, in FIG. 2, when the power is turned on, the control circuit (1) causes the dial signal setting switch (1
The position of 3) is judged, and if it is "automatic", the telephone line (L)
Are closed (steps S1, 3). If the position is in another mode, the dial mode at that position is set (step S2). When the line is closed, a 400 Hz dial tone is output from the exchange, and the voice detection circuit (11) determines the dial tone as a voice signal and outputs an H signal. Upon detecting this, the control circuit (1) controls the dial signal generation circuit (6) to output the 20PPS dial pulse signal of "8" (steps S3, 5). After that, the output signal of the voice detection circuit (11) is determined by waiting for 2 seconds in consideration of the response time of the exchange (steps S6 and 7). If this output signal is "L", it means that the 20PPS dial pulse has been accepted by the exchange, so the control circuit (1) uses this telephone line (L).
Determines that the 20PPS mode is set, and sets the 20PPS mode (step S8). When the 20PPS mode is set, the control circuit (1) automatically makes a dial transmission based on the 20PPS dial pulse signal when dialing with the ten key. When the output signal of the voice detection circuit (11) is determined to be "H" in step S7, the control circuit (1) outputs the tone dial signal of "8" and after waiting for 2 seconds, the voice detection circuit (11). The output signal of is determined (steps S9 to 11). Where "L"
If so, the tone dial mode is set, if it is "H", a 10PPS dial pulse signal of "8" is output, and after waiting for 2 seconds, the output signal of the voice detection circuit (11) is similarly determined (steps S12-). 15). If "L" is set to 10PPS mode, if "H" is set to 20PPS mode.
After setting the mode, the telephone line is released and the process shifts to another process (steps S16-18). Here, when it is not suitable for all dial modes, the 20PPS mode is set. This is because many of the Japanese exchanges are currently compatible with the 20PPS mode.

However, later, in this 20PPS mode,
When the telephone line (L) is not accepted, by switching the dial signal setting switch (13) from "automatic" to another position, the control circuit (1) sets the dial mode of the switched position and the dial mode is set. Since dialing is performed, the adverse effect of setting the 20PPS mode in "automatic" can be prevented.

Although not shown, the control circuit (1) is
The mode set at the "auto" position is stored, and even if the dial signal setting switch (13) is moved from the "auto" position to another position and then set to "auto" again, the stored mode is stored. You can dial with.

Further, after the other mode is set in step S2, the dial signal setting switch (13) is set to "automatic".
When it is set to the position, the control circuit (1) does not perform the processing of steps S3 to 18 described above, and always performs 20PP.
The S mode is set. This is to prevent the dial signal from being sent out when the dial signal setting switch (13) is set to the “auto” position during a telephone call or the like. The 20PPS mode has the same reason as described above.

Next, FIG. 3 will be described. When the control circuit (1) detects an incoming call while the answering machine mode key is operated by operating the answering machine mode key, the telephone circuit (L) is closed and the switching circuit (10) is connected to the recording / reproducing amplifier (9). ) Side and the recording / reproducing circuit (8) is set to the recording mode (steps S19-21). This allows
The caller's message from the telephone line (L) will be recorded. Then, the control circuit (1) is
When the output signal from the voice detection circuit (11) is monitored and the L level signal is detected for 10 seconds, the recording mode of the recording / playback circuit (8) is released and the telephone line (L) is opened (steps S22 to S27). ).

[0016]

Since the present invention is configured as described above, the type of telephone line can be detected by the voice detecting means for controlling the operating state of the recording means, and the type of telephone line can be determined. This type determination can be performed without providing a special circuit for.

[Brief description of drawings]

FIG. 1 is a block diagram of a telephone of the present invention.

FIG. 2 is a flowchart of a program of a main part relating to initial setting processing of a telephone according to the present invention.

FIG. 3 is a flow chart of a main program relating to an answering machine mode process of the telephone of the present invention.

[Explanation of symbols]

 1 Control circuit 6 Dial transmission circuit 8 Recording / playback circuit 11 Voice detection circuit

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Satoshi Hirano 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A dial transmitting means having a tone mode and a pulse mode, a recording means for recording a voice signal input through a telephone line, and a voice detecting means for detecting the presence or absence of a voice signal from the telephone line. After controlling the dial transmitting means to output a pulse signal to the telephone line and then to determine the type of the telephone line based on the state of each telephone line after outputting the tone signal, either the tone mode or the pulse mode is determined. And a control means for stopping the recording means when it is determined that the voice signal is “absent” based on the voice detecting means after the sound recording means is activated. A telephone which detects the state of the telephone line based on the output of the detecting means.