JPS5854712B2 - Calling method of button telephone device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an individual calling method in a button telephone device.Individual calling of an extension in a button telephone device is generally performed by calling an individual number by dialing. This is inconvenient for those who need to make frequent calls, such as for receptionists, as it does not improve efficiency.

In order to compensate for this drawback, there is a system in which a dial is not used, and a call switch corresponding to each telephone is provided, and the call is made by pressing the switch when making a call.

However, even with this method, it is necessary to continue calling until the called party answers. When calling, the call had to continue until the called party answered.

In order to eliminate these drawbacks, the present invention provides a system in which, when a receiver receives an incoming station signal and transfers it to a separate telephone, the receiver automatically starts calling the individual telephone by pressing the individual ring switch described above. However, the called party can recognize the terminating line by the lamp display, and the called party can confirm this and respond to the central office line. During this time, the receptionist's intervention is unnecessary, so the receptionist The present invention provides a calling method for a key telephone device that is extremely effective in improving work efficiency.

A detailed explanation will be given below using the drawings.

FIG. 1 is a block diagram showing the entire key telephone device related to the present invention, where C0,1...CO,n are central office lines, 1
00-L...100-n are office line circuits provided corresponding to office lines, and each is connected to the data highway DH.

200-1...200-n are telephone devices-1,
. . . A telephone-compatible subscriber circuit connected to TEL-n.

TMC is 100-1...100-n, 2001...
- A common circuit that generates control signals for controlling 200-n.

NET in the premises is a telephone call circuit, OU is a telephone control circuit, and SP
is a speaker circuit.

DSS-T is a calling device used in the present invention, and OH2 is its control circuit.

DSS- is the main device side control circuit of the calling device.

Below, in order to explain the operation of the present invention in detail, in FIG.
1 and CCU' 2 b+D S S -K 1 a-
+TE L-n 5P1b, l route circuit diagram as second
As shown in Figures 3, 4.

Fig. 2 is a circuit diagram of the basic system of the present invention and a ringing tone sending circuit, Fig. 3 is a control circuit on the main unit side that performs lamp display in addition to Fig. 2, and Fig. 4 is a circuit diagram of the above-mentioned above. This is a circuit diagram of the telephone side.

FIG. 2 is a circuit diagram for controlling the method of the present invention,
1, 27 are counters, 2, 26 are clock pulse generators, 3, 4, 28.62 are decoders, 5.10, 67.9
1 is an inverter, 8,11°14.31.71.72,
54, 55, 60, 61° 75.86 is an and gate,
7,9,12,32゜56.57, 76.81 are OR gates, 13', 5859 are shift registers, 53 is an encoder, 68 harmonic break 69 is a sine wave oscillator for sound source, 65.66 is an analog gate, 77.78 is a transformer, 79 is an amplifier, 80 is a speaker, 82°83
．． 84 is a contact for the telephone key, 87 is a common contact that operates when the central office line key is pressed, 74 is a delay circuit, 36 is a hook switch, 33 and 34 are contacts for the telephone key for selecting the central office line, 35 is a power source, 37 and 88 , 89, 90 are cables, 40, 51,
52, 63, 64, 7073.85 are flip-flop circuits, ■ indicates the (A) side of the power supply, and E indicates the (→ side) of the power supply.

Further, 1a is a main device side control circuit of the calling device, and 2a is a subscriber circuit of the calling telephone, and a plurality of subscriber circuits are connected in parallel via an OR gate 76 and connected to 1a.

Further, 1b is a calling circuit of the called telephone, 2b is a control circuit of the calling device, and 3b is a control circuit of the calling telephone.

Here, in order to operate the above circuit, first, counters 1 and 27 are connected to clock pulse generators 2 and 26, respectively.
, and further assume that they are synchronized.

For example, when the user raises the handset and presses the telephone key to make a call to the central office line, contacts 33 and 36 become connected.

As a result, the output signal from the decoder 28 driven by the output signal of the counter 27 is T! The timing pulse is applied to the input terminal of the flip-flop 40 via the route [decoder 28 → contact 33 → OR gate 32 → AND gate 31 → cable 37 → flip-flop 40].

As a result of the above, a signal for selecting a central office line etc. has been sent from the telephone 3b to the main device 2a.

The sent signal is received by the main device 2a and stored in the shift register 13.

Here, the timing for inputting to the shift register 13 will be explained.

First, the counter 1 is constituted by a plurality of cascade-connected binary counters, and is driven by a clock pulse train cp which is the output of a clock pulse generator 2.

A time chart of the outputs C1...CIO of the counter 1 is shown in FIG.

Next, the output of the counter 1 drives the decoder 3 and the decoder 4, and the respective outputs t1...tn, T1...
Obtain Tn.

Here, T1...Tn are signals whose pulse width is the period of the output C1o of the counter 1, as shown in FIG.

Also, as shown in FIG. 5, tl...tn are signals whose pulse width is equal to the period of CP, and the pulse width of tl...tn is sufficient compared to the pulse width of T1...Tn. It's small.

Furthermore, signals T1'...Tn' and T1... from the telephone
- There is a relationship between Tn and Tn as shown in FIG. 5, 2 and 3, and they are synchronized with a certain delay.

FIG. 51 is a diagram showing the timing of data in the case of five office lines, and in the figure, LK1...LK indicate signals for the office line telephone keys, respectively.

Further, T indicates a unit time in which T1...Tn are time slots.

As is clear from this figure, the transmission signals T,' from the telephone to the main device are delayed by a certain period of time with respect to T9.

This delay is for correcting the synchronization difference between the counter 1 and the counter 27 by receiving the signal near the center of the pulse width when the main device receives the signal.

In FIG. 2, the flip-flop 40 is of a type that outputs an output at the rising edge of the gate pulse CIO.

Therefore, as described above, when the input signal T,' is applied here, it is output to the output side of the flip-flop 40 in synchronization with the gate pulse C1o, and is applied to one of the input terminals of the AND gate 11.

The output signal at this time is synchronized with the CIO.

Here, C1o is the output of counter 1.

Next, the shift register 13 outputs [output terminal of shift register 13 → AND gate 14 → OR gate 12 →
The input terminal of the shift register 13 forms a feedback loop, the shift register 13 is shifted by the clock pulse CP, and the information input here circulates at a constant cycle.
configured to be remembered.

Therefore, in order to input the signal to the shift register 13,
A timing pulse is output from the OR gate 9 by a circuit constituted by an AND gate 8 and an OR gate 7.9, and one of the output signals is applied to the AND gate 14 through an inverter 10 to close it.

The other signal is applied to the AND gate 11 to open it, thereby inputting the signal applied from the flip-flop 40 to the shift register 13 through the OR gate 12.

Here, this input timing is tl and t2 as described above.
Therefore, the storage position in the shift register 13 is also fixed, and the signal is output at timings tl and t2 one cycle later.

Here, in order to synchronize the input and output of the shift register 13, the storage capacity of the shift register 13 is set to be equal to the steps t1 to tn of one cycle of the decoder 3.

As described above, the office line signals T,' inputted from the telephone are converted into timings tl, t2, which are further applied to one of the input terminals of the AND gates 54, 55 via the OR gate 76.

Next, in the above state, when the telephone key is pressed to make a call from the calling device DSS-T (2b in FIG. 2) and the contact 82 becomes connected, at this time 82 and 84 form interlocking contacts. By doing so, 84 also becomes a contact.

As a result, the timing pulse T6 of the output signal from the decoder 28 driven by the output signal of the counter 27 is sent to the flip-flop via the route [decoder 28 → contact 82 → OR gate 81 → cable 88 → flip-flop 51]. 51 is set at the timing of T3, and its output is encoded by the encoder 53.

Here, the timing for inputting the signal obtained by the encoder 53 to the shift registers 58 and 59 is similar to the operation of storing it in the flip-flop 40 described above, and the signal input to the flip-flop 51 is It is output to the output side and applied to one of the input terminals of the anti-games t-54, 55.

The output signal at this time is synchronized with the CIO. Here, C1
o is the output of counter 1.

Next, the shift register 58.59 outputs [output terminal of shift register 58.59 → AND gate 60°61
→ OR gate 56.57 → input terminal of shift register 58.59] forms a feedback loop, the shift register 58.59 is shifted by the clock pulse CP, and the information input here circulates at a constant cycle. configured to be remembered.

Therefore, in order to input the signals to the shift registers 58 and 59, a timing pulse obtained from the output side of the OR gate 76 is applied to the AND gates 60 and 61 through an inverter 67 to close them.

The other gate is applied to the AND gates 54 and 55 to open them, thereby passing the signal applied from the encoder 53 to the shift registers 58 and 57 through the OR gates 56 and 57.
59.

Here, since this input timing is determined to be the timing stored in the shift register 13, that is, tl and t2, the storage position in the shift register 58, 59 is also fixed, and the timing of tl and t2 after - period. is output.

Here, shift register 58, 59 and shift register 13
In order to achieve synchronization, the storage capacity of each shift register is set to be the same.

As a result of the above, T2' input from the calling device DSS-T
The calling signal 11.12 is stored in the shift register 58, 59 at the same timing as the station line signal 11.12, and in the form of a code indicating individual information such as a contact 84.

Here, and gates 54, 55, or gates 56, 57
, shift registers 58, 59, and gate 60°61
Two of each are shown, but in actual design, the necessary number of them will be connected in parallel.

Next, in the operation described above, if the contact 82 continues to be connected, the contents stored in the shift registers 58 and 59 are retained.

However, when it is disconnected, the contents of shift registers 58 and 59 are erased.

Therefore, even if the contact point 82 is disconnected, that is, the user stops operating the calling telephone key 0, the calling continues, and the shift register 5
A means for erasing the contents of 8.59 is required, and its configuration and operation will be explained below.

In FIG. 2, 70, 7L72, 73, 74. '91゜15
This is the circuit constructed by

Here, when one of the calling telephone keys is pressed on the calling device DSS-T, the common contact 84 is connected together with the contact 82, and the output signal of the counter 27 is output from the driven decoder 28 at the timing of Tls of the output signal. The pulse is [decoder 28
-> contact 84 -> OR gate 81 -> cable 88 -> flip-flop 70] is applied to the input terminal of the flip-flop 70, and it is set at the timing of C1o, and its output is synchronized with Ts.

Therefore, its output signal is Andor-Door 1, T5
A timing pulse of T's is extracted, a flip-flop 73 is set, and the output is delayed by a certain period of time in a delay circuit 74 and applied to one input terminal of an AND gate 75 via an impark 91. is,
The output of AND gate 75 is blocked.

As a result, a timing pulse for writing to the shift registers 58 and 59 is not input, so no rewriting operation is performed.

Therefore, even if the telephone key operation on the calling device DSS-T is stopped and the contact 82 is disconnected, and the state of the flip-flop 51 changes, the information will not be input to the shift register 58, 59, and its contents will be stored in the above-mentioned cycle. It is circulated by a circuit to maintain its contents.

Through the above operations, the calling continues even after the telephone key operation on the calling device DSS-T is stopped.

Although it is omitted in FIG. 2, the called telephone 1b has 3
It includes a circuit similar to b, and is a subscriber circuit 5U for the called telephone.
B-n includes a circuit similar to 2a.

Further, the subscriber circuit 5 is connected to one input terminal of the OR gate 76.
Since the output of the AND gate 75 in 2a included in the UB-n circuit is connected, its output is connected to the 5UB-n circuit.
S U B -n is obtained by the same operation as explained in the transmission of the signal for selecting the central office line from the telephone 3b to the main device 2a in 1 and the storage of the signal in the shift register 13.
An output is obtained at the output terminal of the AND gate 75 included in the shift register 58., which is applied to one of the input terminals of the OR gate 76 and output to its output terminal.
59 is rewritten by the operation described above.

The call is then stopped.

In addition, if the caller (receiver) stops the call before the called party answers, the flip-flop 85 is turned on by connecting the contact 87 of the telephone key of the circuit 3b of the telephone device-1. The AND gate 86 is opened by the output, and the timing pulse T'R is [AND gate 86 → OR gate 8
1→cable 88→flip-flop 70→AND gate 72] is applied to the reset terminal of flip-flop γ3, resets it, and outputs AND gate 7.
5's blockage is lifted.

As a result, as described above, when the receptionist presses the office line telephone key, the shift registers 58 and 59 are rewritten.

The call is then stopped.

When the calling telephone key is pressed for the next call, the contact 84 becomes connected, and the timing T's is applied to the reset terminal of the flip-flop 85 via the contact 84, resetting it.

The operations such as writing and rewriting of the shift registers 58 and 59 have been explained above, but the following describes the operations of the shift registers 58 and 58.
Operations such as calling and displaying by tone will be explained using the output signal of 59.

First, calling by tone will be explained.

In Figure 2, 62, 63, 64, 65, 66.68°69
．． 77.78, 79, 80, and 89.90 are related circuits.

Shift registers 58 and 59 stored as above
The content of is output to its output terminal, which is sent to the decoder 62.
It is expanded by , inputs to the set terminal of flip-flop 63, and sets it.

Here, the output signal of the multi-by break 68 is input to the reset terminal of the flip-flop 63, and the flip-flop 63 is set to have reset priority characteristics, so that the output terminal receives the output signal synchronized with the multi-by break 68. is obtained, and the signal is sent to analog gate 6
The signal is input to the gate terminal of 5, and the output signal of the sine wave oscillator 69 is inputted to the gate terminal of the sine wave oscillator 69 by opening and closing it.
8→amplifier 79→speaker 80], the signal is applied to the speaker 80 and makes it sound.

The above operations enable tone calling of individual telephones.

Although the case where the contact 82 is closed has been described here, when the other contacts, for example 83, are closed, the analog gate 66 opens in the same manner as described above, and the corresponding speaker of the telephone rings. It is.

Next, although it is possible to make an individual call by the operation described above, it is sometimes necessary to select which central office line to receive the call.

In this case, the circuit shown in FIG. 3 is used.

Here, 95 is a decoder, 96.97 is a D-type flip-flop, 98, 99, 101, 102 are AND gates,
100 is an OR gate, and 104 is a multivibrator.

Its operation is as follows: shift registers 58 and 59 in FIG.
The output signal of
Flip flop 9 on route 2 → or gate 100]
By applying it to the gate (clock) terminal of 6, the output signal synchronized with the timing pulse T1 is flip-flopped.
An output from flop 96 is applied to one of the input terminals of AND gate 99.

On the other hand, the specific period e.g. IHz multi-by-break 10
The output signal from 4 is applied to the other input terminal of AND gate 99, and the output signal of the product of the respective signals is obtained at its output.

The signal thus obtained is sent to a corresponding individual control line, for example, the control line of the meter, and is input to the circuit of FIG. 4 mounted on the meter.

In FIG. 4, 106 and 107 are AND gates, 105 is a D-type flip-flop, 108 and 109 are RS flip-flops, and 110 is a display.

Here, the input signal is input to the set terminal of the flip-flop 105 of the circuit shown in FIG.

On the other hand, the output signal of the decoder 28 mentioned above is +1
06 and obtains an output at its output terminal, which is input to the set terminal of flip-flop 108, setting it and outputting the indicator 110 at its output.
lights up.

The above makes it possible to display that a call has been received on an individual station line.

Next, station line acquisition in the present invention will be explained with reference to FIG.

The difference between Fig. 2 and Fig. 6 is that Fig. 6 is the circuit 1a of Fig. 2.
51 to 69, or game door 6, AND gate 75 in circuit 2a, and circuit 1b are omitted, and 119152, 153, 155 in circuit 100a and circuit 2a, and 1 to telephone
The 29°130 part has been added.

In FIG. 6, 100a is a station line circuit, 152, 15
3゜157.158, 159 are AND gates, 155゜162 is OR gate, 156 is inverter, 160゜1
61 is a flip-flop, 119 and 125 are transformers, 119-2 and 1113 are secondary windings of the transformer 119, 29 is a telephone communication circuit, 130 is a hook switch for common control with 36, 163 is a transistor, 164 is a relay, 164-1 is its contact point.

In order to acquire the central office line, the input of central office line acquisition information from the telephone to the shift register 13 is the same as in the previous case.

Next, the output of the AND gate 153 obtained as above is passed through the OR gate 155, and is then output to the AND gate 158 by t□
Only the output at the timing of is passed through, and the flip-flop 160 is set.

Further, when the input of the inverter 156 is at a low level (that is, there is no signal input) at the timing t1, the flip-flop 160 is reset.

Therefore, the flip-flop 160 continues to be set only as long as the telephone key 33 is kept being pressed, the pulse T4 is repeatedly sent from the telephone at the cycle of the counter 27, and the output of the shift register 13 is present. It will be reset when it is cut off.

By setting flip-flop 160, its output terminal becomes bi-level, turning on the emitter-collector of transistor 163 through OR gate 162, operating relay 164, and connecting its contact 164-1.

As described above, a DC loop is formed for the station line, and the station line is captured.

In addition, although FIG. 7 shows a case where there is one central office line and one vehicle telephone set, a circuit of 100a is connected in parallel to point A in the figure, and the input signals t1 of AND gates 157 and 158 are set to 11 and 1, respectively.
By changing the number to 3, 17, 17, 19, etc., multiple office lines can be selectively captured by the telephone.

If a large number of telephones are used, this can be done by connecting the circuit 2a in parallel to point A in the figure.

The operation of acquiring the central office line has been described above, and next, the operation of operating the holding telephone key on the calling device in this state to place the central office line on hold will be described.

The hold information from the calling device is sent in the same way as the central line acquisition information.

When the telephone key for calling is pressed in the above-mentioned state where the central office line is captured, the contacts 82 and 84 are connected, and the signal T's from the decoder 28 is
is inputted to the flip-flop 70 through the contact 84 and through the same path as described above.As a result, it is outputted to the delay circuit 74 as described above, and its output and the output of the shift register 13 are used to determine the timing station t,20). Line capture information and counter 1
The output of AND gate 152 with timing C1 is applied to the input of AND gate 159 through OR gate 155 and point A (transmission path).

On the other hand, with the arrival of the suspension information, the output of the anime game 1153 that has been output so far is blocked by the inverter 156.

Therefore, the flip-flop 160 is reset, and the reset terminal R of the flip-flop 161 becomes low level.

Also, the output terminal Q of the flip-flop 160 becomes bi-level, and this, the signal from the point A, and the timing t2
AND gate 159 is outputted, flip-flop 161 is set, and its output Q is passed through OR gate 162, turning on transistor 163, driving relay 164, making its contact 164-1 close, and closing the station. Hold the line.

Here, the telephone keys 33 and 34 are commonly used interlocking telephone keys, that is, telephone keys that are locked by pressing the office line telephone key.

That is, by the above operation, the central office line is put on hold with the central office line key remaining in the locked state.

Next, when you want to re-answer the central office line, press the re-answer key provided on the telephone, the contact 87 will be connected, and a by level will be input to the set terminal of flip-flop 85, setting it. The output is applied to one of the input terminals of AND gate 86.

Therefore, the output T'R of the decoder 28 is [decoder 28
→AND gate 86→OR gate 81→cable 88→
Flip-flop 70] is input to the set terminal of flip-flop 70 and set.

Here, the flip-flop is the flip-flop 4
It has the same function as 0.

Therefore, the timing pulse TR is outputted to the output terminal of the flip-flop 70 at the same timing as the timing pulse TR, which is inputted to the reset terminal of the flip-flop 13 through the AND gate 2 to reset it.

As a result, the output of the delay circuit 74 disappears, and the AND gate 1
52 is closed and the AND gate 153 is opened, so that the hold is released and the central line is reacquired in the same way as when the central office line was acquired.

Here, flip-flop 85 presses the ringing key and contacts 8
4 is connected, a reset terminal timing pulse T's of flip-flop 85 is applied through contact 84 to reset it.

Further, if the contact 87 is configured to operate when the office line key is pressed, the contact 87 becomes connected when the office line key is pressed, and the flip-flop 73 is reset by the above-described operation.

However, at this time, if the information for acquiring the station line, for example, the contact 33 is first connected and then the contact 34 changes, the information for acquiring the station line by the contact 33 will be cut off when it becomes disconnected. , the suspended state is maintained without reacquiring the central office line.

Next, if the contact point 33 is brought into contact, the object can be captured again.

Although the explanation using FIG. 2 as an embodiment is based on the case where the present invention uses wiring logic, the present invention is also possible with storage program control by a CPU or the like.

An example is shown in FIG. Comparing Figure 7 and Figure 2, Figure 7 shows the shift register and 58 to 58 in Figure 2.
59, and a control circuit for inputting signals sent from the calling telephone circuit 3b and the calling device circuit 2b to the memory and outputting the stored contents, that is, 7,8°9.10, 11, 12, 13, 14, 53, 5
4°55.56,57,58,59,60,61.

The circuits 62.71.72, 73, 74, and 75.76 can be replaced with a storage device having a plurality of storage areas corresponding to the central processing unit CPU, the calling device DDS-T, and the button telephone device-1 to position n. .

Further, the circuit 2b of the calling device has a calling key 8 corresponding to the calling telephone.
2,83,84, by inputting the calling information compatible with the calling telephone using a keyboard switch called a numeric keypad, and converting it into the calling information compatible with the called telephone using a control circuit provided in the calling device. , it is possible to replace the system in which a signal similar to that shown in FIG. 2 is input from the calling device to the storage device via the CPU provided in the main device.

Hereinafter, FIG. 7 will be explained in more detail.

In FIG. 7, 26 and 20L213 are clock pulse generators, each having an equal period and synchronized with each other.

202 212 is a counter, 203 is a storage device, 204
1205 and 206 are D-type flip-flops, 207 and 208 are AND gates, 209 is a comparator, 110 is a latch circuit, and 111 is a keyboard.

The operation in FIG. 7 is as follows.

When there is an incoming station signal, when the handset is raised on the telephone 3b and the telephone key 33 is pressed, a signal for selecting the station line is sent to the input terminal of the flip-flop 40 in the same way as explained in the operation of FIG. 2 above. The output signal is input to the CPU 214, processed, and stored in the allocated area of the storage device 203.

In the above state, the keyboard 211 of the circuit 2C of the calling device
When the individual number for calling the called telephone 1b is entered, it is sent to the flip-flop circuits 205 and 20.
6, etc., the latch circuit is set, and its output is applied to one input terminal of the comparator 209.

In addition, the other input terminal of the comparator 209 is connected to the force/kunter 212.
When the output terminal of the comparator 2 is connected and the state of the counter 212 becomes equal to the state of the latch circuit 210, the comparator 2
09 is configured to provide an output, the output signal of which is similar to that in FIG. The data is stored in the allocated area of the storage device 203 via the storage device 203.

Through the above operations, the contents stored in the storage device 203 are processed by the CPU 204, and the output information is set in the flip-flop 205, and the output is sent to the computer.
) 207, it is determined by the cycle of the multi-bye break 68, for example, ON for 1 second.

The voltage is applied to the gate of the analog gate 65, and is turned on and off with a period of 3 seconds off.

The following operation is similar to that shown in FIG. 2, and the speaker 80 makes a sound.

Next, the operation to display the lamp on the telephone is the same as the operation shown in FIG. 5, but the circuit configuration is as shown in FIG. 8, and the flip-flop 96 is set by the output signal of the CPU 204. .

The following operations are the same as those described above, and will therefore be omitted.

Further, it is possible to combine the circuit 1a in FIG. 2 with the circuit 2c in FIG. 7, and the circuit 2b in FIG. 2 with the circuit in FIG. 7 and 10.

As described above, the present invention provides a key telephone device in which a plurality of key telephones are selectively connected to a plurality of office lines using a main device, a plurality of call lines, and a plurality of control lines. Each of the telephones is provided with a plurality of central line selection switches 33, 34 corresponding to the central office lines, and at least one of the plurality of button telephones is provided with a plurality of call switches 82, 8 respectively corresponding to the plurality of button telephones.
4, the main device includes a plurality of first memories 13 corresponding to the plurality of button telephones, and at least one second memory corresponding to the paging device.
Memo'J 58, 59 is provided, and when an incoming call is received from a central office line, Q appropriate one of the plurality of central office line selection switches is pressed to store information indicating the selected central office line in the first memory. If you want to transfer after answering the central office line, press the calling switch indicating the transfer destination telephone among the plurality of call switches to store information indicating the transfer destination telephone in the second memory, The contents stored in the first memory and the second memory can be read out and transmitted to the transfer destination telephone to display the called status of the transfer destination telephone and the selected office line. This is a calling method for a key telephone device that is configured as follows.

More specifically, the present invention provides a button telephone device in which a plurality of key telephones are selectively connected to a plurality of office lines using a main device, a plurality of call lines, and a plurality of control lines. In the main device, a first pulse generator for generating a clock pulse, a plurality of rows of high-speed time slot pulses corresponding to the office line, and a plurality of rows of low-speed time slot pulses for control signal transmission corresponding to the control line. 1, 2° 3.4, a plurality of first circulation memories 13 corresponding to the plurality of button telephones, and control outputs transmitted from the corresponding button telephones via the control line 37 to control the plurality of rows. a plurality of first writing means 7, 8, 9, 10, 11.4 for writing into a corresponding one of said plurality of first circular memories in synchronization with a low speed time slot pulse for signal transmission;
0, and each of the plurality of button telephones includes:
a second pulse generator 26, 27.2 for generating a synchronous time slot pulse substantially synchronized with a corresponding one of the plurality of rows of low speed time slot pulses for transmitting control signals;
8, a first operating means 33, 34 including a plurality of telephone keys for selecting a central office line corresponding to the central office line, and an AND output between the output of the first operating means and the synchronization time slot pulse, from the corresponding button telephone. control output means 31 and 32 for taking out the control output for taking out the control output, the control output being sent out by a designated operation of the central office line selection telephone key in any one of the key telephones; a calling device DSS-, which is configured so that one of the central office lines designated by the button telephone set is time-divisionally connected to the key telephone set so that a central office line call can be made, and is attached to a specific telephone among the plurality of key telephone sets; T.

2b includes a second operation means 82,83 including a plurality of calling keys provided corresponding to each of the key telephones for individual calling, an output of the second operation means, and the synchronization control output means 81 for extracting a paging control signal from the paging device by AND output with the time slot pulse;
A second circular memo IJ 58 , 59 corresponding to the calling device is connected to the main device via a control line 88 , and a second circular memo IJ 58 , 59 is transmitted from the corresponding calling device via the second control line 88 . an output of the first circular memory for writing a subsequent call control output into a corresponding one of the plurality of second circular memos IJ 58, 59 in synchronization with the plurality of rows of slow time slot pulses for control signal transmission; Second writing means 70.7L72, 73, 74, 7 for guiding signals
5, 76.91, encodes a calling signal transmitted from the calling device, stores it in the second circular memory by the second writing means, and decodes the output by a decoder 62, A gate circuit 65.77 controlled by the output thereof is inserted between the signal device 69 and the communication line 89.90, and the signal device is connected to the speaker circuit 78, 79.80 mounted on the telephone via the communication line. The output signal can be input to make the speaker sound.

Further, converting means 96, 97, 100 decode the output of the second circulating memory by a decoder 95 and convert the speed into a pulse synchronized with the low speed time slot.
, 101, 102 in the main device, and display means 106, 107, 108, 109, provided in the called telephone, whose output is transmitted via the first control line 37a corresponding to the called telephone.
110 and display it.

Furthermore, the calling device is provided with a common contact 84 that operates in conjunction with the second operating means, and a control signal is received from the calling device by AND output between the common contact and the low-speed time slot pulse for transmitting the control signal. The second control output means is connected to the main device by a second control line 88, and the main device is provided with a bistable circuit 73 corresponding to the calling device. , a second circuit controlled by the output of the bistable circuit and connected to the output of the second circular memory.
gate means 75, the bistable circuit 73 is set by a control signal transmitted from the corresponding paging device via the second control line 88, and the second gate means is controlled; It is possible to control whether or not to send out the output signal of the one circular memory 13.

As explained above, the present invention is a system in which a button telephone device is configured to respond to incoming calls centrally, and by making it possible to make calls in conjunction with incoming calls, it is possible to send calls to other telephones. It has the advantage of facilitating line transfer, improving the work efficiency of the receptionist (or handler), and realizing this at low cost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the button telephone device of the present invention, FIGS. 2 and 7 are block diagrams showing examples of a call control circuit used in the present invention, and FIGS. 3 and 8 are main views of the display in the present invention. A block diagram showing an example of a call control circuit on the device side,
Fig. 4 is a block diagram showing an example of a control circuit on the telephone side for display in the present invention, Fig. 5 is a time chart for explaining the present invention in detail, and Fig. 6 shows a telephone communication circuit system used in the present invention. It is a block diagram.

Claims (1)

[Scope of Claims] 1. A button telephone device in which a plurality of button telephones are selectively connected to a main device and a plurality of office lines using a plurality of communication lines and a plurality of control lines, wherein the plurality of button telephones is provided with a plurality of switch for selecting a central office line corresponding to the central office line, and at least one of the plurality of button telephones is provided with a calling device having a plurality of calling switches respectively corresponding to the plurality of button telephones. , the main device includes a plurality of first storage means corresponding to the plurality of key telephones and at least one second storage means corresponding to the calling device; Press a corresponding one of the station line selection switches θ to store information indicating the selected station line in the first storage means, and when you want to transfer the response wave to the station line, call the plurality of stations. Pressing a call switch indicating the transfer destination telephone among the service switches to cause information indicating the transfer destination telephone to be stored in the second storage means, and storing contents of the first storage means and the second storage means. A calling system for a button telephone device, characterized in that the calling system is configured to be able to read and transmit the information to the transfer destination telephone to display the called status of the transfer destination telephone and the selected office line. 2. In a button telephone device that uses a plurality of key telephones, a main device, a plurality of call lines, and a plurality of control lines to selectively connect to a plurality of office lines, the main device has clock pulse and office line support. a first pulse generator for generating a plurality of rows of high-speed time slot pulses and a plurality of rows of low-speed time slot pulses for control signal transmission corresponding to the control lines; and a plurality of first pulse generators corresponding to the plurality of button telephones. and a control output transmitted from the corresponding button telephone via the control line to the corresponding one of the plurality of first circulating memories in synchronization with the plurality of rows of low-speed time slot pulses for control signal transmission. a plurality of first writing means for writing into one, and each of the plurality of button telephones has a synchronous time slot substantially synchronized with a corresponding one of the plurality of rows of control signal transmission time slot pulses. a second pulse generator for generating pulses; a first operating means including a plurality of telephone keys for selecting a central office line corresponding to the central office line; and an output of the first operating means and the synchronized time slot pulse. and a control output means for extracting the control output from the corresponding key telephone by AND output, and a calling device attached to a specific telephone among the plurality of key telephones further includes a control output means for extracting the control output from the corresponding key telephone. A second operating means including a calling key provided corresponding to each of the button telephones receives a calling control signal from the calling device by AND outputting the output of the second operating means and the synchronous time slot pulse. a first control output means for outputting the first control output means;
a second circulating memory connected to the control output means of the controller by a second control line and corresponding to the calling device; and a calling control signal transmitted from the corresponding calling device via the second control line. writing means for directing an output signal of the first circular memory for writing into a corresponding one of the second circular memories in synchronization with the plurality of rows of slow time slot pulses for transmitting control signals; The stored contents of the first circulating memory and the second circulating memory are read out and transmitted to the called telephone set specified by the calling telephone key, and the contents are selected according to the called state of the called telephone set and the central office line selection telephone key. 1. A calling method in a button telephone device, comprising: a transmission means for displaying a central office line. 3. As the transmission means, the main device includes a decoding means for decoding the coded contents of the calling signal transmitted from the calling device and stored in the second circular memory, and an output of the decoding means. and a signal device connected to a telephone line via the first gate means, and each of the plurality of button telephones includes a speaker circuit connected to the telephone line. Calling in the button telephone device according to claim 2, wherein when a calling control signal is sent from the calling device, the output signal of the signal device is inputted to a speaker to cause the speaker to ring. method. 4. As the transmission means, the main device includes a conversion means for decoding the output of the second circulation memory and converting the speed into a pulse synchronized with the low-speed time slot for transmitting the control signal, and each of the plurality of button telephones 3. A calling method in a button telephone device according to claim 2, further comprising a display means for transmitting the output of the converting means to the display means via a control line and displaying the output. 5. The calling device includes a common contact that operates in conjunction with the second operating means, and a control signal is taken out from the calling device by AND output between the common contact and the low-speed time slot pulse for transmitting the control signal. a second control output means, the second control output means is connected to the main device by a second control line, a bistable circuit corresponding to the calling device is connected to the main device, and a bistable circuit corresponding to the calling device; a second gate means controlled by the output of the stabilizing circuit and connected to the output of the second circulating memory, the control signal being transmitted from the corresponding paging device via the second control line The button telephone device according to claim 2, characterized in that the button telephone device is configured to set a stabilizing circuit, control the 20th) gate means, and control the output signal of the second circulation memory. calling method.