JPS6314558B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a system in which one extension key of a key telephone is used by switching between a normal extension key and a calling key.

To call an extension on conventional button telephone devices, there are two methods: pressing the extension key, hearing a dial tone, and then dialing the extension number to make the call, using the extension key as a "normal extension key" and pressing the calling key. A method of calling a specific extension directly without dialing the extension number (Direct Station)
Selection method (abbreviated as DSS method), but this DSS method requires a DSS telephone key in addition to the extension telephone key on the key telephone, and the destination of the DSS call is determined by the wiring. The above settings and changes involve setting and changing the wiring, which has the disadvantage that the construction is complicated and inconvenient.

In order to solve the drawbacks of the conventional DSS method of key telephones, the present invention has a semi-fixed or fixed storage device for each extension key of each button telephone, and the extension key corresponding to this storage device is
An extension calling method in a button telephone device that stores information on whether or not it is being used as a DSS key, and switches the extension key to a DSS key or a normal extension key based on the stored DSS information. This is what we provide.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a diagram showing the configuration of the system of the present invention, in which 1 is a key unit of a button telephone, 2 is a key information input circuit, 3 is a semi-permanent storage device or fusible ROM such as a mechanical switch, diode matrix, EPROM, etc. A subscriber data storage device using a fixed storage device such as a mask ROM, and 4 a control circuit.

The operating principle of the present invention will be explained based on FIG. Now, when you press the extension key of a vacant extension in the key unit 1 of the button telephone, the information of this extension key is sent to the control circuit 4 by the telephone key information input circuit 2, and the control circuit 4 receives the DSS corresponding to this extension key.
The information is read from the subscriber data storage device 3, it is determined whether or not the extension telephone key is preset as a DSS telephone key, and if it is set as a DSS telephone key, the key telephone corresponding to the DSS destination is placed in a ringing state. and when the extension key is set to a normal extension key, a dial tone is sent to the button telephone set on which the extension key is pressed.

FIG. 2 shows an embodiment of the present invention based on the configuration shown in FIG. 1, in which KT1 and KT2 are key telephones, ME is the main device, 10 and 20 are extension telephone keys corresponding to one extension, 11, 21 is an extension key corresponding to other extensions, 12, 13, 22, 23 are inverters, 14, 24 are push button dial devices,
15, 25 are parallel-serial conversion circuits, 16, 26 are line drivers, 17, 27 are data lines, 18, 28
is a speaker, 19 and 29 are calling lines, 30 and 31 are line receivers, 32 and 33 are serial-to-parallel conversion circuits,
34 is an input switching circuit, 35 is an encoder, and 36 is rewritable using an ultraviolet erasing method, for example.
ROM, 37 is a dial number storage circuit with a storage function compatible with key telephones, 38 is a startup circuit consisting of gates, flip-flops, memory, etc.;
9 is an OR circuit composed of an OR gate, 40 is an extension sequence control circuit composed of gates, flip-flops, memories, etc., 41 is an output line of the OR circuit 39, 42 is an activation line of the dial digit storage circuit 37, and 43 is an Output lines 50 and 60 of the starting circuit 38 are circuit networks for communication, and 51 and 61 are communication lines.

Here, the electric key unit 1 in FIG. 1 corresponds to the extension electric keys 10, 11, 20, 21 in FIG.
The electric key information input circuit 2 shown in the figure includes inverters 12, 13, 22, 23, parallel-to-serial conversion circuit 15,
25, line driver 16, 26, data line 1
7, 27, line receivers 30, 31, serial/parallel conversion circuits 32, 33, input switching circuit 34, and encoder 35. Further, the subscriber data storage device 3 in FIG. 1 corresponds to the ROM 36 in FIG.
The control circuit 4 in FIG. 1 corresponds to the dial numeral storage circuit 37, starting circuit 38, OR circuit 39, and sequence control circuit 40 in FIG.

Next, the operation of the embodiment shown in FIG. 2 will be explained.

In the ROM 36, DSS information is set in advance for each extension key of each button telephone according to the purpose of use, and this DSS information becomes "0" when the extension key is used as the above-mentioned normal extension key.
Also, when used as a DSS telephone key, it becomes the extension number of the called party.

Extension key 10 to 11 of button telephone KT1
When pressed, the extension telephone key information is sent to the parallel-to-serial conversion circuit 15 through inverters 12 and 13, respectively. Further, when a dial is made from the push-button dial device 14, the dial information is sent to the parallel-to-serial conversion circuit 15 in the form of dialed numbers. The parallel-to-serial conversion circuit 15 performs parallel-to-serial conversion on the extension telephone key information and the dial number information, and sends them out to the data line 17 through the line driver 16 in the form of time-division pulses. This time-division pulse passes through a line receiver 30 and is serial-parallel converted by a serial-parallel conversion circuit 32.

Further, when the extension key 20 or 21 of the button telephone KT2 is pressed, the extension key information is sent to the parallel-to-serial conversion circuit 25 through the inverters 22 and 23, respectively. Moreover, the push button dial device 24
When dialing from , the dial information is sent to the parallel-to-serial conversion circuit 25 in the form of dialed numbers. The parallel-to-serial conversion circuit 25 performs parallel-to-serial conversion of the telephone key information and the dial number information, and sends it out to the data line 27 through the line driver 26 in the form of time-division pulses. This time-division pulse is transmitted to the line receiver 31.
The serial to parallel conversion circuit 33 converts the data into serial to parallel.

On the other hand, the input switching circuit 34 switches the input of the input switching circuit 34 according to the timing allocation shown in FIG.
At the timing of the button telephone KT1, the dial number information of the serial/parallel conversion circuit 32 is sent to the dial number storage circuit 37, the extension telephone key information is sent to the encoder 35, and at the timing of the button telephone KT2, the dial number information of the serial/parallel conversion circuit 33 is dialed. The numeric information is sent to the dial number storage circuit 37, and the extension telephone key information is sent to the encoder 35.

The extension telephone key information sent by the input switching circuit 34 is converted by the encoder 35 into an extension telephone key code including the telephone number and the extension telephone key type.
It is sent to the ROM 36 and the startup circuit 38. ROM3
6 sends the DSS information of the extension key of the button telephone corresponding to the extension key code to the extension sequence control circuit 40 through the OR circuit 39.

The activation circuit 38 activates the extension sequence control circuit 40 when the dialed number storage circuit 37 finishes storing dialed numbers and when the encoder 35 outputs the extension telephone key code. When the extension sequence control circuit 40 is activated by the activation circuit 38, if the content output through the OR circuit 39 is not "0", it is the calling extension number from the dial number storage circuit 37 or the ROM 36, so the extension sequence control circuit 40 is activated by the activation circuit 38. A calling signal is sent to the button telephone corresponding to the number via the calling lines 19, 29, and when it is "0", a dial tone is sent to the button telephone corresponding to the extension telephone key code, and the dial number is stored in the dial number storage circuit 37. Activate the accumulation of.

Under the above operations, the DSS information for extension keys 11, 20, and 21 is now "0", and the DSS information for extension key 10 is now "0".
It is assumed that "N" is preset in the ROM 36 as the DSS information and that the dial number storage circuit 37 has been reset.

In this state, the following actions occur depending on which key is pressed.

(1) When pressing the extension telephone key 11 This telephone key information is [Inverter 13 → Parallel/serial conversion circuit 15 → Line driver 16 → Data line 1
7 → line receiver 30 → serial-parallel conversion circuit 32
→Input switching circuit 34] route to encoder 3
5, and the ROM 36 outputs the DSS information of “0” according to the extension telephone code output from the encoder 35.
Send to OR circuit 39. At this time, the dial numeral storage circuit 37 has been reset, so it ends up being
The output of the OR circuit 39 becomes "0".

Further, the activation circuit 38 activates the extension sequence control circuit 40 based on the extension telephone key code output from the encoder 35, but at this time, the OR circuit 39
Since the output of is "0", the extension sequence control circuit 40 sends the telephone line 51 to the key telephone KT1.
A dial tone is sent out via the dial numeral storage circuit 37, and the dial numeral storage circuit 37 is activated. next,
For example, when the extension number of the button telephone KT2 is dialed from the pushbutton dial device 14, the dialed number is [parallel-serial conversion circuit 15 → line driver 16 → data line 17 → line receiver 30
→Serial-to-parallel conversion circuit 32→input switching circuit 34] are accumulated in the accumulation circuit of the key telephone KT1 of the dialed digit accumulation circuit 37, and when the dialed digit accumulation circuit 37 finishes accumulating the dialed digits, they are accumulated in the activation circuit 38. After sending the termination signal, the activation circuit 38 activates the extension sequence control circuit 40. At this time, the output of the ROM 36 is "0", so the OR circuit 39 outputs the dialed number stored in the dialed number storage circuit 37, and the extension sequence control circuit 40 sets the button telephone corresponding to the dialed number. KT
The second calling line 29 is selected and a calling signal is sent to the speaker 28.

(2) When the extension key 20 is pressed After the same operation as explained in (1), for example,
When the extension number of the button telephone KT1 is dialed from the pushbutton dialing device 24, the calling line 19 of the button telephone KT1 corresponding to the dialed number is dialed.
A calling signal is sent from the extension sequence control circuit 40 to the speaker 18 through the internal line.

(3) When the extension telephone key 10 is pressed, this telephone key information is [Inverter 12 → Parallel/Serial conversion circuit 15 → Line driver 16 → Data line 1
7 → line receiver 30 → serial-parallel conversion circuit 32
→Input switching circuit 34] route to encoder 3
5, and the ROM 36 receives the DSS information of “N” using the extension telephone code output from the encoder 35.
Send to OR circuit 39. At this time, since the dial number storage circuit 37 has been reset, the output of the OR circuit 39 becomes "N". Further, the activation circuit 38 activates the extension sequence control circuit 40 based on the extension telephone key code output from the encoder 35, but at this time, the output of the OR circuit 39 is "N".
Therefore, for example, "N" is a button telephone KT.
When the extension number is "N", the extension sequence control circuit 40 switches the button telephone corresponding to the extension number "N".
The call line 29 of KT2 is selected and a call signal is sent to the speaker 28.

According to the explanations in cases (1), (2), and (3) above, multiple extension keys for the same button telephone can be independently set as normal extension keys or DSS keys for each line, and , it can be seen that the extension keys of key telephones corresponding to the same extension can be independently set for each telephone as either a normal extension key or a DSS telephone key.

An outline of the above operation is shown in the form of a flowchart in FIG.

FIG. 5 shows the extension sequence control circuit 40 of FIG.
2 is a detailed diagram showing an example of the above. In the figure, 41 is a number line, which is the output line of the OR circuit 39 in FIG. 2. 43-1 is a starting pulse line, and 43-2 is an extension link number line, both of which are connected to the starting circuit 3 in FIG.
8 output line. 44 is a timing number line corresponding to the timing assignment shown in FIG. 1
Reference numerals 9 and 29 are calling lines, which are connected to the speakers 18 and 28 of KT1 and KT2 in FIG. 2, respectively.
Reference numeral 42 is an activation line for activating the dial numeral storage circuit 37 shown in FIG. 51-1, 51-2 and 6
1-1 and 61-2 are communication lines corresponding to communication lines 51 and 61 in FIG. 2, respectively. 70 is a translator consisting of a rewritable ROM that erases ultraviolet rays; 170 is an output line of the translator 70, which is a telephone accommodation position information line; and 171 is a dial tone activation device that outputs when the content of the number line 41 is 0. Lines, 72, 77 are decoders, 73, 7
4, 78, 79, 80 are AND gates, 75, 7
6, 81, 82 are SR flip-flops, 83,
84 is a relay driver, 85 and 86 are relays, 8
7 is a ringing sound source, 88 and 89 are analog gates, 9
0 is a cross point drive circuit composed of a gate, a latch register and a driver, 91 is a dial tone signal device, 92 and 93 are transformers, 9
4, 95 are contacts of the relay 85, 96, 97 are contacts of the relay 86, 89, 99, 100, 101 are resistors, 110, 111, 112, 113, 114,
115, 116, 117 are cross point switches each composed of a thyristor, 120, 121
and 122, 123 are the extension key 10 in FIG.
20 and extension links selected by the extension telephone keys 11 and 21, respectively. In addition, the symbol +V in the figure
is the power supply.

Next, based on FIG. 5, the extension sequence control circuit 4
The operation of 0 will be explained.

Now, it is assumed that "0" is set as the DSS information of the extension key 20 in FIG. 2, and the extension number of KT2 is set in advance in the ROM 36 of FIG. 2 as the DSS information of the extension key 10. In this state, the extension key 20 in Fig.
When you press , "0" read from the ROM 36 in FIG. 2 is output to the number line 41 in FIG. 5 through the above-mentioned operations, and a startup pulse and extension link number are output to the startup pulse line 43-1. The line 43-2 has an extension link 120,1 selected by the extension key 20.
The number 21 is output. Starting pulse line 43-1
The output of the extension link number line 43-2 and the output of the timing number line 44 cause the crosspoint drive circuit 90 to drive the crosspoints 112 and 113.
Turn on. Further, since the output of the numeric number line 41 is "0", an output is output to the dial tone activation line 171 of the translator 70 and the AND gate 78 is opened. On the other hand, the output of extension link number line 43-2 is decoded by decoder 77, and as a result, AND gate 79 is opened. Therefore, the pulse on the starting pulse line 43-1 is applied to the AND gates 78, 7.
9 to set the SR flip-flop 81.
The output of the SR flip-flop 81 drives the relay driver 83, and this output drives the relay 85.
operates and the contacts 94 and 95 of this relay 85 are turned on, so the dial tone of the signal device 91 passes through the transformer 92, relay contacts 94 and 95, and cross points 112 and 113 to the communication lines 61-1 and 61-.
2 is sent out.

On the other hand, the output of the AND gate 78 is connected to the activation line 42.
The dial number storage circuit 37 shown in FIG. 2 is activated.

In this state, when the extension number of KT1 is dialed by KT2 in FIG. 2, the extension number of KT1 output from the dialed number storage circuit 37 in FIG. 2 is displayed on the number line 41 in FIG. A starting pulse is output to the starting pulse line 43-1. The output of the number line 41 is converted into an accommodation position number by the translator 70 and output to the accommodation position information line 170, and this output is sent to the decoder 7.
2 to open the AND gate 73. Therefore, the activation pulse passes through AND gate 73 and sets SR flip-flop 75. The analog gate 88 is opened by the output of the SR flip-flop 75, and a ring tone is sent from the ring tone source 87 to the ring line 19.

In addition, when the extension telephone key 10 shown in Fig. 2 is pressed, the number line 41 shown in Fig. 2 is displayed after the above-mentioned operation.
The phone number of KT2 read from the ROM 36 is output, a startup pulse is output to the startup pulse line 43-1, and the extension link 120,1 selected by the extension key 10 is output to the extension link number line 43-2.
The number 21 is output. Starting pulse line 43-1
, the output of the extension link number line 43-2, and the output of the timing number line 44, the crosspoint drive circuit 90 turns on the crosspoints 110 and 11. Also, the output of number line 41 is KT2
Since it is a telephone number of
This output is expanded by decoder 72 and opens AND gate 74. Therefore, the activation pulse passes through AND gate 74 and sets SR flip-flop 76. SR flipflop 7
6 opens the analog gate 89, and a ringing tone is sent from the ringing sound source 87 to the ringing line 29.

In addition, flip-flops 75, 76, 81, 8
The reset in step 2 can be performed by any appropriate method within the allotted time for each telephone in FIG. 3, but it may also be done in synchronization with the switching operation of the input switching circuit 34.
Alternatively, a pulse generated from the timing circuit shown in FIG. 5 may be used.

Although the above operations are configured and explained using wiring logic, for example, part or all of the electronic key information input circuit 2 and control circuit 4 in FIG. This can also be achieved using a method.

As explained above, in the system of the present invention, by providing a subscriber data storage device for each extension key of a button telephone, any extension key can be used as a DSS key for each arbitrary button telephone, and,
Setting and changing the DSS calling extension number can be done by setting and changing the contents of the subscriber data storage device.
Construction is easy.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the principle of the method of the present invention.
2 is a block diagram showing an embodiment of the present invention based on the principle of FIG. 1, FIG. 3 is a timing chart showing timing assignment of the input switching circuit in the embodiment of FIG. 2, and FIG. FIG. 5 is a block diagram showing an example of an extension sequence control circuit used in the embodiment of FIG. 2. FIG.

Claims (1)

[Claims] 1. For each extension key of each button telephone, the extension key is used as a normal extension key used to make a call by pressing down the extension key and then dialing the extension number, or a storage means for storing whether the telephone key is to be used as a calling telephone key used for directly calling a specific extension without pressing and dialing an extension number; 1. An extension calling system in a button telephone device, characterized in that the telephone key is provided with a control means for causing the telephone key to operate as either the normal extension telephone key or the calling telephone key.