JPS6028195B2 - Push button dial signal relay method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a push-pin dial signal relay system for button telephone equipment, and in particular, in order to improve operability and economical efficiency, the push-pin dial signal is transmitted from a button telephone equipped with a push-pin dial to the main device. This relates to a method of relaying circuits and transmitting data to central office lines.

A conventional general system of this type is shown in Fig. 1 and explained. In the figure, KT○...KT9 are key telephones, H
S is the handset, N is the communication circuit, WI is the two-wire telephone wiring, PBS is the pushbutton dial bushing point, K is the control button contact, K is the parallel-to-serial conversion circuit, DT is the data transmission circuit,
ME is the main device, XI is the telephone wiring WI and the office line circuit TRK
○...Main switch matrix connecting TRK9, D
R is a data receiving circuit, SP is a serial-parallel conversion circuit, X2 is a second switch matrix that connects the serial-parallel conversion circuit SP and the audio frequency dial sender RS, and x3 is the connection between the audio frequency dial sender RS and the office line circuit TRKO...TRK9. The third switch matrices to be connected, COO...CO9, are office lines.

In the push dial signal relay system of the button telephone device with such a configuration, for example, the button telephone KTO is connected to the central office line CO.
When capturing O and transmitting, the main switch matrix
The key telephone KTO and the office line circuit TRKO via I
to the central office line COO. In addition, in order to relay the push spade dial numbers from the button telephone KTO and send them to the central office line in the form of audio frequency dial codes, a vacant voice frequency dial sender RS is connected to the data receiving circuit DR corresponding to the button telephone KTO. , closes the intersection of switch matrix X2, and closes the intersection of switch matrix x3 to connect the audio frequency dial sender RS to the office line circuit TRKO. In this case, when the push-nail dial contact PBS closes, the number on the push-nail dial is converted by the parallel-to-serial converter circuit PS into a serial data code corresponding to the number meant by the specific contact, and then sent by the data transmission circuit DT via the wiring W2. Sent to main device M old,
The data is received by the data receiving circuit of the main device ME, and is restored from the serial data code by the serial/parallel conversion circuit SP to 4-bit parallel data representing the numbers meant by the contacts of the push-in dial. The restored data is transferred to the relay sender RS, and the audio frequency dial sender RS generates a corresponding audio frequency dial code, which is sent to the office line CO via the third switch matrix X3 and the office line circuit TRKO.
Sent to O. In the button telephone KTO, the parallel-to-serial converter circuit PS periodically inputs the presser zero dial contact P, and when the contact is closed, sends the corresponding serial data code to the main unit. Therefore, the audio frequency dial sender RS has a serial data code holding circuit and continues to send out the same audio frequency dial code as long as this value does not change. When the serial data code indicates that all contacts are open, the audio frequency dialing code that is being sent is stopped. In a system with such a configuration, an audio frequency dialing code generation circuit is not provided in the press dial of the button telephone, and an expensive audio frequency dialing code receiving circuit is provided in the main device ME to receive the extension number of the other party. The voice frequency dial sender RS is economical because it is not necessary, but since the voice frequency dial sender RS is put on hold until the key telephone KT finishes dialing and the other party answers, it is not suitable for use when there are many calls to a central office like a button telephone. The operation of the parallel-to-serial conversion circuit PS of the pushbutton telephone is due to the relatively high price of this part and the fact that the audio frequency dialing code is transmitted and stopped to the central office line CO in accordance with the depression of the push nail dial. The period must be shortened and the data transmission speed must be increased, which makes the associated circuits expensive. Furthermore, if the voice frequency dial sender RS is released in response to the other party's response in order to reduce the number of voice frequency dial senders RS, there is a drawback that numbers cannot be sent from the button telephone using push button dialing during a call. In view of the above points, the present invention has been made to solve these shortcomings, and its purpose is to make the related circuits more economical and to make it possible to send numbers even during a call by using a push dial. It is to provide the means.

The key telephone set and the main device that sends the voice dial code are provided with a memory function, and the voice frequency dial code is sent to the office line CO. The audio frequency dial code sending circuit is configured to send out only one digit, which simplifies the sending circuit and greatly reduces the number of circuits required, thereby making the system cost more economical. This system allows numbers to be sent to the central office line as audio frequency dial codes from the push-nail dial at any time while the system is capturing the data. The present invention will be described below with reference to the illustrated embodiment. FIG. 2 is a diagram showing an embodiment of the push-pin dial signal relay system of the present invention.

In FIG. 2, the same parts as in FIG. DM is a dial memory for storing the numbers on the push dial contact P in a first-in, first-out manner by the control unit CTL when the contact PBS is closed; DTR1 and DTR2 are connected to the push-button telephone K via wiring W2.
CC is the main control circuit of the main device ME, and NM is a data transmitting/receiving circuit that sends and receives data between T and the main device ME. A number memory is stored in a first-in first-out manner for each telephone by the main control circuit CC, S is a dial code sending circuit that sends a single digit in audio frequency format to the office line CO via the office line circuit TRK, and x4 is the office line circuit TRK. This is a switch matrix that interconnects the audio frequency dial code sending circuit S when necessary.

According to the present invention, for example, the key telephone KTO is connected to the central office line CO.
Suppose you capture O, raise the handset HS and make a call.
The main switch matrix XI of the main device ME closes the intersection between the key telephone KTO and the office line circuit TRKO.

When the push-button dial contact PBS of the push-button telephone closes, the control unit CTL inputs this through the scanning circuit SCN that periodically scans the opening and closing of the push-button dial contact, and stores the number corresponding to the contact in the dial memory DM. . If the data transmission/reception circuit DTR2 is transferred from the main control circuit CC of the old main device M
, DTRI, the button telephone KTO sends the numbers in the dial memory DM to the main control circuit CC of the main device ME via the data transmitting/receiving circuits DTR1 and DTR2. However, when the push-button dial contacts are subsequently opened and closed, the numbers corresponding to these contacts are stored in the dial memory DM in a first-in, first-out manner in the same manner as described above. Therefore, even if a transmission request is made when a plurality of numbers are stored, there will be no error since they are taken out from the dial memory DM in a first-in, first-out manner. When one or more push button dial numbers are stored in the number memory NM of the main device ME, the main control circuit CC captures the vacant voice frequency dial code sending circuit S, and the central office line circuit to which the button telephone TO is connected. At the same time as connecting TRKO and the captured audio frequency dialing code sending circuit S via the fourth switch matrix, the intersection between the telephone KTO and the office line circuit TRKO of the main switch matrix XI is opened.

Furthermore, the main control circuit CC takes out the push spade dial numbers from the number memory NM in a first-in, first-out manner and transfers them to the audio frequency dial code sending circuit S. Here, the dial audio frequency code sending circuit S sends the transferred one digit to the office line COO via the office line circuit TRKO for a predetermined time, and when the sending is finished, the fourth switch matrix releases the connection and Main switch matrix
The intersection of I is closed and the audio frequency dialing code sending circuit S is free again. Therefore, the audio frequency dial code sending circuit S is held on a specific office line only for about 100 milliseconds, which is the time it takes to send out one digit of the dial code, and the holding time of the conventional system is about 1. The number of equipment is significantly reduced compared to sand. FIG. 3 shows an acoustic confirmation to the user that the pressing down of the dial is operating normally when the push-down dial of the button telephone is operated in the push-down dial signal relay method of the button telephone device according to the present invention. In order to provide a means by which the voice frequency dial code sent from the main device to the office line can be transmitted at a low level to the key telephone side without opening the intersection of the main switch matrix XI.

In Fig. 3, a circuit in which the relay break contacts h are connected in parallel is inserted into the communication line J, and while the sending circuit S sends out the audio frequency dial code, the relay day is controlled by the main control circuit CC. Operate it and insert the resistor R into the communication line J.

The audio frequency dial code sent out by the audio frequency dial code sending circuit S is sent to the button telephone KT via switch matrix X4, resistor R, main switch matrix x1, and wiring WI.
It is transmitted at a low level to O's handset HS and confirmed by a voice call from the handset. According to the present invention, the expensive audio frequency dial code generation circuit is removed from the conventional push nail dial, and the signal function equivalent to that of the conventional system is realized by only providing a small number of audio frequency dial code generation circuits in the main device. This has the advantage of making it possible to reduce the size and weight of the button telephone device by making it economical and simplifying the circuit, thereby significantly increasing the usefulness of the button telephone device.

Furthermore, the present invention has the advantage that it is possible to confirm the operation of the push button dial and is easy to use.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a push spade dial signal relay system of a conventional key telephone device, FIG. 2 is a diagram showing an embodiment of the present invention, and FIG. 3 is a partially detailed diagram of the present invention. KT0...KT9...button telephone, RS...handset, N...talk circuit, P spot...push button dial contact,
K...Control button contact, SCN...Scanning circuit, CT
L...Control unit, DTR1...Data transmission/reception circuit, D
M...Dial memory, W1, W2...Wiring, ME
...Main device, x1...Main switch matrix, X4...Switch matrix, DTR2...Data transmission/reception circuit,
CC...Main control circuit, TRK0...TRK9...
Office line circuit, S...Voice frequency dial code sending circuit, N
M...Number memory. Figure Ship Figure N Ship Figure 3

Claims (1)

[Scope of Claims] 1. When capturing a central office line and making a call using a button telephone, the button telephone and the central office line circuit are connected via a main switch matrix, and the connection to the central office line is made at the same time;
In a relay system in which push-button dial numbers from the button telephone are transmitted to the main device when the push-button dial contact is closed, the main device generates an audio frequency dial code and sends it to the office line via the office line circuit. storing in a dial memory a number corresponding to the push button corresponding to the closed push button dial contact in the control unit via a scanning circuit that periodically scans the push button dial contact when the dial contact is closed;
And in response to a data transmission request from the main control circuit of the main device, the numbers in the dial memory are sent to the main control circuit, stored in the number memory via the main control circuit, and the audio frequency dial code sending circuit is in an empty state. The push button dial signal relay system is characterized in that the number stored in the number memory is sent to the office line via the office line circuit when the number is reached. 2. A button telephone is equipped with a push-button dial contact, a scanning circuit connected to the push-button dial contact, a transmitting/receiving circuit and a control section connected to the scanning circuit, and a dial memory connected to the control section, and a main device. a data transmitting/receiving circuit, a main control circuit, a number memory connected to the control circuit, a main switch matrix with a button telephone circuit connected to one side and a central office line circuit connected to the other side, and a main switch matrix for one digit. a voice frequency dial code sending circuit having a data memory of 1, and another switch matrix having one side connected to the terminal connected to the office line circuit of the main switch matrix and the voice frequency dial code sending circuit connected to the other side. installed, the control unit of the button telephone periodically scans the push button dial contacts with a scanning circuit, and when it detects that one push button dial contact is closed, stores the number corresponding to the push button dial contact in a dial memory; In response to a request signal from the control section of the main device, the data transmission/reception circuit is used to send the accumulated number to the data transmission/reception circuit of the main device in a first-in, first-out manner, and the control section stores this number in a number memory. , when the voice frequency dial code sending circuit becomes free, the intersection between the connected office line circuit of the main switch matrix and the telephone circuit is opened, and the station line circuit of the other switch matrix and the vacant voice frequency dial code sending circuit are opened. The intersection with the circuit is closed, one digit of the pre-entered number stored in the number memory is transferred from the number memory to the vacant audio frequency dialing code sending circuit, and the audio frequency dialing code sending circuit is connected to the station. 1 to the office line via the line circuit
The control section sends out the audio frequency dialing signal for the digits for a predetermined period of time, and when the sending is finished, the control section makes the audio frequency dialing code sending circuit idle, opens the intersection of the another switch matrix, and switches the main switch matrix to the main switch matrix. 2. The push button dial signal relay system according to claim 1, wherein the push button dial signal is transmitted to the central office line by closing the intersection of the station. 3. When capturing a central office line and making a call using a key telephone, connect the key telephone and the central office line circuit via the main switch matrix, and at the same time connect to the central office line,
When the push-button dial contact closes, the push-button dial numbers from the button telephone are transmitted to the main device, and the main device generates an audio frequency dial code and sends it to the office line via the central office line circuit, and the push-button dial contact closes. Through a scanning circuit that periodically scans the pushbutton dial contacts when closed, the control unit stores in the dial memory the numbers corresponding to the pushbuttons corresponding to the closed pushbutton dial contacts; In response to a data transmission request, the numbers in the dial memory are sent to the main control circuit, stored in the number memory via the main control circuit, and stored in the number memory when the audio frequency dial code sending circuit becomes idle. In a relay method in which the numbers are sent to the office line via the office line circuit, one side of another switch matrix connected to the terminal of the main switch matrix is moved from the terminal to the office line circuit side, and the main switch matrix and the office line circuit are connected. By making the connection with a parallel circuit of a resistor and the break contact of the relay, when the audio frequency dial code sending circuit sends out the dial code, the contact is opened without opening the intersection of the main switch matrix, and dialing is made to the button telephone through the resistor. Sends a confirmation sound,
A push-button dial signal relay system characterized by a structure in which a contact is closed when transmission is completed.