JPS6220497A - Key telephone set - Google Patents

Abstract

PURPOSE:To eliminate the need for a circuit which informs a main equipment and a key telephone set of incoming from a trunk line by providing each key telephone set with an incoming detecting circuit which detects the incoming from the trunk line and an incoming tone generating circuit which indicates the incoming. CONSTITUTION:When there is incoming from trunk lines T and R, an incoming detecting and incoming signal sounding circuit Cil detects the incoming and drives a speaker SP1 to generate an incoming tone, thereby indicating the incoming. When a trunk line key LK is turned on and a handset is put off the hook, a hook switch HS2 is closed and a changeover relay control circuit M1 operates; and relay contacts a1 and a2 are changed over to the trunk line side by a trunk line/extension changeover relay A to connect a speech network t1 to the trunk lines T and R, so that a telephone set having the calling network t1 is placed in a calling state. Then, when another key telephone set is called, a hold key HK is turned on and then a signal transmission control circuit M2 and a signal oscillation circuit OSC1 send out a carrier burst signal HKa for a time (t); while an extension key CK is pressed, a pilot signal CKa is sent out.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a methane telephone device for home use in which a plurality of butane telephones can be used.

(Prior Art) A conventional butane telephone device will be described in Section 5 (2). The same figure is a block circuit diagram showing the incoming call system of a conventional butane telephone device.
m... Consists of Tst3. The main device includes an incoming call detection circuit Ci that detects incoming calls on the central office line, and this incoming call detection circuit Ci transfers signal data to each methane telephone Tat1...
- Consists of a sending circuit D0 that sends out to Te13 and a power supply unit. Also, each butane telephone Te1l...T
et3Fi, a telephone T with a hook switch H5 whose circuit closes when the handset is lifted, and a telephone network and a dial network connected to the station iT/R.
1 and the above sending circuit. a speaker control circuit Dlo that receives signal data; and a spill force control circuit Di. It is composed of an amplifier circuit AMPI controlled by a speaker SPI, and a speaker SPI that notifies reception.

The operation of the conventional butane telephone device having such a configuration will be explained.

When there is an incoming call from the central office line T/R, the incoming call detection circuit C1 of the clay fiK detects it, and the signal data detected by the sending circuit D0 is transferred to the power line and sent to each button telephone Tetl...
Send to Tet3. Button telephone Tetl...Te
The control circuit Dio of t3 detects the signal data sent through the power line, creates a station line ring tone, and outputs the amplifier circuit AMP.
It is amplified by I-... and generates station W# ring tone from speaker SPI....

(Problems to be Solved by the Invention) However, in the conventional button telephone device, the signal data when an incoming call is detected from the central office line is transmitted to each button telephone T.
・tl...T@t3 requires a sending circuit D0, and each p1 button telephone Tetl...Tot3 also requires a speaker i1t11g1 circuit D1° to receive the signal.

In addition, if you receive a call during a power outage, each button telephone T
Since the speaker SPI of etl...Tet3 does not operate, there is also the problem that it is necessary to install a bell adder on each button telephone Ta1l...Tej3.

The present invention solves the above-mentioned problems, and aims to provide a device for filling the cod ζtan, which does not require a sending circuit of the main device and does not require the installation of a bell in each telephone even in the event of a power outage. It is.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides each button telephone with an incoming call detection circuit for detecting an N call from a central office line, and a ring tone blasting circuit for notifying an incoming call. It is something.

(Function) Since each butane telephone is equipped with an incoming call detection circuit and a ring tone blasting circuit, there is no need for a circuit to notify the main device and each button telephone of incoming calls from the central office line, which is necessary in the event of a power outage. There is also no need to install additional bells.

(Example) Embodiments of the present invention will be explained with reference to FIGS. 1 to 4.

Figure @1 is a system configuration diagram of a butane telephone device according to the present invention, which is composed of a main device having a power supply section and three button telephones Tθt1...Tst3.

Figure 2 is a block circuit diagram of a butane telephone, including one d?
This is an expression related to Tanden Telephone Information. This will be explained below. The button telephone T s L 1 includes an incoming call detection and ringtone sounding circuit C'il, a central line/extension switching relay A and its relay contacts a1 and &2, and a switching relay control circuit M1 that controls the central/extension switching relay A. , dial signal sending circuit Dl, telephone call circuit TL, three hook switches H8 that close the circuit when the handset is lifted.
1, H82 and HS 3, Office line key LK, Hold key H
K, extension call key CK, 1 for transmitting carrier burst signals and pilot signals, i number transmission control circuit M2, signal oscillation circuit 08CI for the above carrier burst signal and no-P pilot signal, voice band amplifier circuit AMPI, pilot signal It is comprised of a pilot signal reception/amplifier control circuit R1 that controls reception and the above-mentioned voice band amplification circuit.

Figure 3 is a block circuit diagram of the main device K, with holding relay Ho
and its relay contacts, and the holding relay control circuit M3.
Local line call 1! It is composed of a photocoupler PH1 for L flow detection, a carrier burst signal detection circuit CD, and a holding/closing resistor R% power supply section.

The fourth factor is a timing chart of the operation of the button telephone device configured as described above, which shows, from the top, the Chiyarya burst signal HK&, the Nohira Ilot signal CKas, and others.

Regarding the button telephone device having such a configuration, the symbol Tet
The operation of the butane telephone indicated by l will be explained as an example. In FIG. 2, when an incoming call is received from station lines T and R, the incoming call detection and ring tone sounding circuit C1l detects the incoming call 1, drives the speaker SPI 7, and plays a ring tone to notify the incoming call.

When you insert the station line key LK and lift the no-do-senoto, hook switch H82 closes, switching relay control circuit M1 is activated, and relay contacts a1 and &2 are switched to the station line side by station line/inner storage = Ginui switching relay A. In contrast, the hook switch) (Sl as described above) 1 handset is raised and closed, so that the telephone network t1 is connected to the central office lines T and R, and the telephone having the telephone network tli is connected to the central office line. becomes.

Next, in order to call another butane phone, the hook switch H83 is closed by lifting the handset as described above, so when the hold key HK is pressed, the 1 signal sending control circuit M2 and the signal are activated as shown in FIG. A carrier burst signal HKa is sent out by the oscillation circuit 03CI for a time t,
Next, press the extension call key CK.
A signal CKa is sent out.

When calling the internal telephone by voice, press the internal call key CK. The main pilot signal CKa is sent to the other key telephones Tet2 and Tet3 via the power line H, and the pilot signal detection and amplifier control circuits R2 and R3 (not shown) are sent to the other key telephones Tet2 and Tet3. When detected, the voice band amplification circuits of the other butane telephones T@t2 and T*t3 are turned on, as shown in the timing chart in Figure 4, and the voice signal on the spot line H is amplified. and is sent out from the speaker SPI.

The operation of the main device when the above-mentioned hold key HK is pressed will be explained.

The main device is a photocoupler PH1 for detecting station line current.

It detects that the office line is in a talking state and turns on.

The hold relay control circuit M3 detects a carrier burst signal HK sent out when the hold key HK of the button telephone T/tl is pressed, using a carrier burst signal detection circuit CD, and turns on the hold relay contact. The correlation between the office line call signal S2 and the operation S3 of the holding relay H0 in FIG. 4 shows this state.

The handset of the telephone T@L2 or T@t3 that has been called has been lifted and is now ready to talk to the central office line, so when the hold key HK is returned, the hold relay H0 is activated and the hold state is released.

Note that the carrier burst signal detection circuit CD in the main device receives the sending signal from the same signal oscillation circuit 08CI;
Carrier burst signal HK, pilot signal CK, and time t are used to distinguish between carrier burst signals HK, pilot signals CK, and time t.
Even if you press K'i by mistake, the hold relay Ho will not work.

In addition, an extension call can be made through the respective communication circuit networks t1 by simply raising the handset of the two telephones.

(Effects of the Invention) As explained above, according to the present invention, each button telephone is equipped with a circuit for detecting incoming calls on a central office line and for sounding a ring tone, so that the speaker of each button telephone will play the ring tone even in the event of a power outage. do. Therefore, there is no need for a circuit for detecting the arrival of a single-office line and transmitting and receiving it to the key telephone.

Since the main device is only composed of a power supply section and a holding closure circuit, it is small in size.

Furthermore, it is now possible to easily regulate the blasting of the central office line ringing tone for each key telephone, which was previously impossible because the central office line ringing tone and extension voice calling were controlled in the same way.

Furthermore, since the office line incoming call detection signal and the extension voice call signal are configured separately, it is easy to establish a conversation with the office line simply by picking up the handset, making it extremely easy to respond to an incoming call.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of a button telephone device according to the present invention, FIGS. 2 and 3 are block circuit diagrams of the button telephone and main device of the button telephone device of FIG. 1, and FIG.
The figure is a timing chart of its operation, and FIG. 5 is a block circuit diagram of the incoming call system of a conventional key telephone device. T/'R-...Station line, K...Main device, Tetl, T
et2. TfIt3...key telephone, Ci...incoming call detection circuit, Do...sending circuit, D...power supply section, H
8... Hook switch, T1... Telephone. Dl. ...Speaker control circuit, AMPI...Amplification circuit, SPI...Speaker, K...Main device, Cll...
・・Incoming call detection and ringtone sounding circuit, A・・Central line/extension line switching relay. al...Relay contact, a2...Relay contact, Ml.
...Switching relay control circuit, Di...Dial signal sending circuit, TL...Telephone network, H2N, H82, H
83... Hook switch, LK... Office line key, HK
...Pending -1CK...Extension call key, M2...
Signal transmission control circuit, 08CI...signal oscillation circuit,
AMPI...Voice band amplification circuit, R1...Pilot signal reception/amplifier control circuit, Ho...Holding relay,
h...Relay contact, M3...Holding relay control circuit,
PH1: Photocoupler for detecting station line current, CD: Carrier burst signal detection circuit, R: Resistor for holding and closing. Tin 1 Figure 2 Figure 3 Figure 4 Ho'ru 53 Procedural amendment (spontaneous) June 20, 1985 Director General of the Patent Office Uga Michibu 1, Indication of case Patent application No. 158411-1988 2 , Title of the invention: Button telephone device 3, Representative of the person making the amendment: Akio Tanii (
2) Figures 2 and 3 are corrected as shown in the attached corrected drawings. Full Text Corrected Description 1, Name of Invention Button Telephone Device 2, Claims In a button telephone device consisting of a plurality of button telephones connected in parallel to a main device, each button telephone has an incoming call detection and ring tone sounding circuit. and a dialing circuit, a relay circuit that switches the call circuit from extension to return line when off-hook by a detected incoming call detection signal or operation of the office line key, and a carrier burst signal outside the audible band on the office line call line by operation of the hold key. A circuit that sends out a pilot signal outside the audible band along with a voice signal to the extension call line when the extension call key is operated, turns ON by the pilot signal outside the audible band when on-hook.
The main device is equipped with a device that amplifies and amplifies the voice signal on the extension call line, and a circuit that detects the office line call current and a circuit that detects the carrier burst signal sent out when the hold key is pressed. , a hold relay that forms a hold loop using signals from these circuits, and an extension power source. 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a button telephone device for home use in which a plurality of key telephones can be used. (Prior Art) A conventional key telephone device will be explained with reference to FIG. This figure is a block diagram showing the incoming call system of a conventional key telephone device, which includes a main device connected to a central office line T/H and a plurality of key telephones Te111...Tei!
It consists of 3. The main device includes an incoming call detection circuit C8 that detects incoming calls from the central office line, a sending circuit D0 that allows this incoming call detecting circuit C1 to send signal data to each button telephone Tef+1...Te13, and a power supply section. There is. Further, each button telephone Teρ1=4eN3 includes a hook switch H3 whose circuit is closed when the handset is lifted, a telephone T1 having a telephone communication circuit network and a dial circuit network connected to the central office line T/R, and the above-mentioned sending circuit. the law of nature. a speaker control circuit D, which receives signal data of; and an amplifier circuit A controlled by this speaker control circuit D1°.
It consists of an MPI and a speaker SPI that notifies reception. The operation of the conventional button telephone device having such a configuration will be explained. When there is an incoming call from the central office line T/R, the incoming call detection circuit C1 in the main device detects this, and the sending circuit D0 puts the detected signal data on the power line and sends each button telephone Tel! 1...
Send to Te13. Button telephone Ta1l...TeN
3. Control circuit. detects the signal data sent through the power line, creates a ring tone for the office line, and uses the amplifier circuit AMPI.
. . . amplifies the signal and generates a central office line ring tone through the speaker SPI . (Problems to be Solved by the Invention) However, in the conventional button telephone device, signal data indicating an incoming call detected from a curve is sent to the main device K from each button telephone T.
There was a problem in that a sending circuit D0 for sending out signals to e41...Teρ3 was required, and each button telephone set TeQ1...TeN3 also required a speaker control circuit D1° for receiving the signals. In addition, if you receive a call during a power outage, each button telephone T
eQ1...Tel! Since the speakers SPI . . . 3 do not operate, there is also a problem in that it is necessary to install a bell increaser in each button telephone set Teρ 1 . . . TeN 3. The present invention solves the above-mentioned problems, and aims to provide a button telephone device that does not require a sending circuit of the main device and does not require installing a bell adder in each button telephone even in the event of a power outage. (Means for Solving the Problems) In order to solve the above problems, the present invention provides each button telephone with an incoming call detection circuit that detects incoming calls from the central office line, and a ring tone sounding circuit that notifies the incoming calls. be. (Function) Since each button telephone is equipped with an incoming call detection circuit and a ring tone sounding circuit, there is no need for a circuit to notify the main device and each button telephone of incoming calls from the central office line, and it is also necessary in the event of a power outage. Increase 2. There is no need to install . (Example) An example of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a system configuration diagram of a button telephone device according to the present invention, which is composed of a main device having a power supply section and three button telephones Teρ1...Teρ3. FIG. 2 is a block circuit diagram of a button telephone, and is represented for one button telephone. This will be explained below. The button telephone Te111 includes an incoming call detection and ringtone sounding circuit c11, a central office line/extension line switching relay A and its relay contacts a1 and a2, a switching relay control circuit M1 that controls the central office line/extension switching relay A, and a dial signal sending circuit. D1, communication circuit t1, three hook switches H5I, which close the circuit when the handset is lifted, H
32 and H53, office line key LK, hold key HK, extension call key CK, signal transmission control circuit M2 for transmitting carrier burst signals and pilot signals, signal oscillation circuit 0 for the above carrier burst signal and pylon 1-signal.
3CI, transformer T that sends a carrier burst signal to the office line and has insulation, voice band amplification circuit AMPI, pilot signal reception and the above voice band amplification circuit AM
Pilot signal reception/amplifier control circuit R that controls PI
It is composed of 1. Figure 3 is a block circuit diagram of the main device, holding relay H0
and its relay contact, hold relay control circuit M3,
Old photocoupler P for detecting communication current on the office line, carrier burst signal detection circuit CD, tuning transformer TD for receiving the carrier burst signal from the office line, resistor R for holding and closing,
It consists of a choke coil L to prevent the carrier burst signal from leaking to the office line, and a power supply section. FIG. 4 is a timing chart of the operation of the button telephone device configured as described above, and from the top, the carrier burst signal HKa, the pilot signal CKa, the operation S1 of the voice band amplifier circuit AMPI of the other button telephone, and the central office line call. Signal S
2 and operation S3 of the hold relay H0 are shown. Regarding the button telephone device with such a configuration, the symbol TeQ
The operation of the button telephone indicated by l will be explained as an example. In FIG. 2, when an incoming call arrives from station lines T and R, the incoming call detection and ringing tone sounding circuit C1 detects the first call and drives the speaker SPI to sound the ringing tone to notify the incoming call. When you insert the office line key LK and lift the handset, hook switch H52 closes, switching relay control circuit M1 is activated, and relay contacts a1 and a2 are switched to the office line side by office line/extension line switching relay A, and hook switch H3I is activated.
is closed by lifting the handset as described above, so that the telephone communication network t1 is connected to the office lines T and R, and the telephone having the telephone communication network t1 is placed in a communication state with the office line. Next, to call another button telephone, the hook switch H33 is closed by lifting the handset as described above, so when the hold key HK is pressed, the signal transmission control circuit M2 and the signal oscillation circuit are activated as shown in FIG. 03CI causes the carrier burst signal HKa to be sent out for a time t, and then when the extension call key GK is pressed, the pilot signal CKa is sent out while the extension calling key GK is pressed. When calling an extension by voice, when the extension calling key CK is pressed, a pilot signal CKa is sent to the other key telephones TaN2 and Teff3 by the power line H, and the pilot signal detection and amplifier control circuits R2 and R3 (not shown) are sent to the other key telephones TaN2 and Teff3.
When detected, the voice band amplification circuits of the other button telephones TeN2 and Te123 are turned on as shown in the timing chart of FIG. 4, and the voice signal on the power line H is amplified and sent out from the speaker SPI. The operation of the main device when the above-mentioned hold key HK is pressed will be explained. The photocoupler P old for detecting the office line current in the main device detects that the office line is in a communication state and turns on. The hold relay control circuit M3 controls the hold key H of the button telephone Teρ1.
Carrier burst signal H sent out when K is input
Ka is detected by the carrier burst signal detection circuit CD, and the hold relay contact is turned on. The correlation between the office line call signal S2 and the operation S3 of the holding relay H in FIG. 4 shows this state. When the handsets of the called key telephones Te112 and TcJ3 are lifted and the central line key is pressed, the central telephone call state is established.Since the main unit receives the central telephone call signal, the hold relay H is turned off and the hold state is released. Note that the carrier burst signal detection circuit CD of Dosei@ receives the sending signal of the same signal oscillation circuit 05CI,
Since carrier burst signal HKa and pilot signal CKa are distinguished by time t, extension call key C is pressed during a call to the office line.
Even if K is pressed by mistake, the hold relay H does not move. In addition, an extension call can be made through the respective call circuit networks t1 by simply lifting the handsets of the two key telephones. (Effects of the Invention) As explained above, according to the present invention, each button telephone is provided with a circuit for detecting an incoming call on a central office line and for sounding a ring tone, so that the speaker of each button telephone sounds the ring tone even in the event of a power outage. do. Therefore, there is no need for circuitry to detect incoming curve calls and send and receive them to the key telephone. Since the main device is only composed of a power supply section and a holding closure circuit, it is small in size. Furthermore, it is now possible to easily regulate the ringing of the office line ringtone for each key telephone, which was previously impossible because the controls for the office line ringtone and the extension voice call were the same. Furthermore, since the office line incoming call detection signal and the extension voice call signal are configured separately, it is easy to establish a conversation with the office line simply by picking up the handset, making it extremely easy to respond to an incoming call. 4. Brief description of the drawings FIG. 1 is a system configuration diagram of a button telephone device according to the present invention, and FIGS. 2 and 3 are block circuit diagrams of the button telephone and main unit of the button telephone device of FIG. 4
The figure is a timing chart of its operation, and FIG. 5 is a block circuit diagram of the incoming call system of a conventional key telephone device. T/R...Station line, K...Main device, Ta1l. TaN2. Te13...button telephone, C1...
...Incoming call detection circuit, Do...Sending circuit, D...
Power supply unit, H8...hook switch, T1...telephone, DIG...speaker control circuit, AMPI...amplification circuit, SPI...speaker, K21. Main device, C
11...Incoming call detection and ringtone sounding circuit, A...
Office line/extension line switching relay, al...relay contact,
a,...Relay contact, Ml...Switching relay control circuit, Dl...Dial signal sending circuit, tl...
...Telephone network, H3I, H52, H33...hook switch, LK...office line key, HK...hold key,
GK...Extension calling key, Ml...Signal sending control circuit, 03CI...Signal oscillation circuit, AMPI...Voice band amplification circuit, R1...Pilot signal reception/amplifier control circuit, Ho... Hold relay, h... Relay contact, M3... Hold relay control circuit, PH1...
Photocoupler for local line current detection, CD...carrier burst signal detection circuit, R...resistance for holding and closing. Figure 2 Figure 3

Claims (1)

[Claims] In a key telephone device consisting of a plurality of key telephones connected in parallel with the main device, each key telephone has an incoming call detection and incoming tone sounding circuit, a dialing circuit, and a detected incoming call detection signal or the operation of a central office line key. A relay circuit that switches the call circuit from the extension line to the office line when off-hook, a circuit that sends a carrier burst signal outside the audible band to the extension call line when the hold key is operated, and a circuit that sends a carrier burst signal outside the audible band to the extension line when the hold key is operated, along with a voice signal to the extension line when the hold key is operated. A circuit that sends out an external pilot signal, a device that is turned ON by the above-mentioned pilot signal outside the audible band when on-hook, and amplifies and amplifies the audio signal of the internal communication line, and the main device has a circuit that transmits the internal communication current. A detection circuit,
A button telephone device comprising a circuit for detecting a carrier burst signal sent out by operation of the above-mentioned hold key, a hold relay that forms a hold loop using signals from these circuits, and an extension call power source. .