JPS58198988A - Key telephone device - Google Patents

Abstract

PURPOSE:To reduce the number of core of a cable by dividing number of key telephone set into plural groups, providing data transmitting and receiving circuit in a main device corresponding to the group, and using a combined control at every group and connecting it to the data transmitting and receiving circuit. CONSTITUTION:All telephone sets are divided into two groups of telephone sets TA1-TAm, and TB1-TBn. Talking lines 17 are provided corresponding to the key telephone sets. The combined control line 18 and the combined data transmitting and receiving circuits 7 and 8 are provided for the plural key telephone sets TA1-TAm, and TB1-TBn and the numbers of the telephone set (telephone set codes) are changed within the group and without reference to the group, so the data transmitting and receiving circuits 7 and 8 are operated through the common control port of a microprocessor 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a button telephone device in which the number of cores of a cable connecting a main device accommodating a plurality of office lines and a large number of telephones is reduced.

Recently, in order to cope with the demand for multi-functionality and a reduction in the number of cable cores, microprocessors have been used in the control circuits of the main device and telephone, and the control information between the main device and the telephone is converted into time-division pulses. 3.However, 1) Data transmission/reception circuits and control lines are provided for each telephone, so it is recommended that they be connected by a pair of communication lines and a pair of control lines. If the number of telephones in the button telephone device is N, the number of telephones will be N x 4 (2 talking lines, 2 control lines) if the wiring is done in the Multitro 71 type, so the number of telephones will be proportional to the number of telephones. For example, when 10 telephones are installed, the number of cable cores increases.4.1 The present invention proposes a button telephone device in which the number of cores is further reduced. do.

The present invention will be described in detail below with reference to embodiments of the drawings.1.
FIG. 1 is a professional diagram of the button real-time device according to the present invention;
FIG. 2 is a diagram showing the data format of the present invention.

The button telephone device according to the present invention is connected between the main device and the telephone.

A system is used in which the control information, that is, the information indicating data such as keys and lamps held by telephones, is converted into time-division clocks, which are further time-divided and assigned to each telephone.

In FIG. 1, I> is the main device, T At , T
A2, TAmll, 'H+, i, 'Hn are button telephones, l is a microprocessor with built-in memory, 2.3.4 is an office line circuit, 5 is a communication path cross-point switch, and 6 is a communication path switch control circuit. , 7.8 is a data transmission/reception circuit, 9.13 is a communication circuit, 10.14 is a control circuit including a circuit for converting parallel to serial signals,
11.15 is a display such as a lamp, and 12.16 is a data input means such as a telephone key, which are the same for each telephone. 17 is a communication line, and 18 is a control line that also serves as a power supply line. 19 is a power supply that supplies power to the telephone side.

As you can see from the above explanation, all phones are phone TA+
It is divided into two groups: ~T/'un and telephones Tt3+~TBn, and a data transmitting/receiving circuit 7.8 is provided in common for each of these groups, and is connected to a common control port for the microprocessor 1. 5. Next, the operation will be explained. The button telephone device according to the present invention converts the control information between the main unit and the telephone into time-division pulses, and further time-divisions and assigns them to each telephone. To explain the angle according to Figure 2, l) At, 1) A3...
・1) lsn (1 each from the main device ij MF, to each telephone T, At to T, Hn [7-C indicates data to be sent, data I) At is to telephone 1' A IU this data 1) 2 is the data for the telephone 1''A2, and similarly, V(data IN+n is sent to the telephone 1''In, respectively, and these operations are performed cyclically.

For each data 1) Al to DBn, the corresponding telephone code, lamp drive information, utility code, etc. are assigned in the same pattern.

1) l” A I, old” A 2-・・・・-・・l
) TB n are telephones TA1, '1゛l\2, respectively.
・・・・・・Data sent from TBn, data from the above-mentioned device Ml) A I-1)
In response to 13n.

Each telephone code, telephone key information, SIJ code, etc. are assigned in the same pattern as the data format. The point of the arrow from the data indicates that the data has been received.

Now, when ``telephone 1'', A, and 1 operate a predetermined telephone key 12 to make a call to the central office line, the control circuit 10 that performs parallel-to-serial signal conversion detects this, and the main device ME
The button phone from m'1. When the data DA+ for "A+" is received, the data processing is performed, and the above detection information is converted into data 1) i", into the control signal of the data format described above as data 1), and sent to the IPA signal transmitting/receiving circuit 7 through the control line 18. Send to. This data I)T
A+ is stored in its internal memory under the control of the microprocessor 1, and its stored contents are processed according to the internal program memory of the microprocessor 1, thereby operating the communication path switch control circuit 6, thereby causing communication path crossing. The point switch 5 is operated to connect the office line (for example, the office line Ll) to the telephone call circuit 9 of the key telephone TAI, thereby enabling a call between the office line I.] and the key telephone 'L'A+. On the other hand, the stored data 1′) i,”
The contents of A1 are further processed by the program and incorporated into data l) A+ to DHn as information for lighting up indicators (for example, station line lamps) 11 and 15, and the main unit N+
tv to each telephone T, AI~l'l:i through the data transmitting/receiving circuit 7.
The telephone numbers are sent to telephones 1.1 and 1.1 in sequence, and the display (office line lamp) of each telephone turns on, indicating that the office line 1.1 is in use. .

Also, if there is an incoming call from the office line (for example, office lines 1 and 2), the calling signal is received by the office line circuit 3, and the output is given to the -1. Proceno-IJl stores this information, processes it in the internal program, and sends it out by incorporating it into each data I)A+~Hen as information to operate the display (corresponding station line lamp and buzzer circuit). Line incoming life is indicator II, 1
5. 33 With this incoming call display, for example, if you use the telephone key 16 of the button telephone TB+ to respond to the central office line, the operation information will be displayed as data l) i' H
1 to the main device ME.

So, as above, set the communication path cross point switch 5.
is operated to connect the telephone call circuit of the key telephone TI3+ to the central office lines 1 and 2, enabling a telephone call.

As can be seen from the above explanation, the communication line 17 is provided correspondingly to each button telephone, but the control line 18 and the data transmitting/receiving circuit 7.8 are connected to a plurality of button telephones.
l″z'l+~i″Am and i″13+ ~T Bn
The data transmitting/receiving circuit 7.8 is provided on the common side 011j of the microprocessor 1 in order to make it possible to change the telephone number (telephone code) not only within each group but also across groups. Operated by boat.

The data transmitting/receiving circuit 7.8 will be explained in detail below with reference to FIG. FIG. 3 shows a data transmitting/receiving circuit according to the present invention, and since both circuits 7 and 8 are constituted by the same circuit, one is omitted from the illustration. In the figure, G is a level discrimination circuit, R1, R2, and R3, IL4 is a resistor for determining the reference and detection level, Z l) is a Zener diode, Ql, Q2 are transistors, I) +, l)
2 is a backflow prevention diode, C1 and C2 are DC cut capacitors, and W is a transmitting/receiving terminal connected to the control line 18, respectively. X is the reception output terminal, Y is the transmission gate terminal,
Z is a data input terminal, which is connected in parallel to each port of the microprocessor l; 4, and a level discrimination circuit (1 is a wired output terminal configured by using an open collector type output); .Next, to explain the operation, microprocessor 1
When transmitting data (for example, data DA+), apply a potential to the gate terminal Y to make the transistor Q1 active, and then apply a pulse I according to the information content to the data input terminal f-Z. For example, the transistor (No. 2 is O
When transistor Q2 is OFF, the voltage at the connection point P is almost equal to the voltage determined by the Zener diode Z, and when transistor Q2 is ON,
At this time, the potential is almost at earth's potential, so a pulse signal of a constant level is sent from the data transmitting/receiving circuit 7.8 to the control line 18 and given to each telephone. As mentioned above, the telephone code and U/Z information have been converted into the above pulse signal, so the corresponding telephone (phone 111A, ) receives it and transmits its own data 1) l' A + to the main device. M.E.
(Since this data is sent out, a pulse signal based on the data is given to the transmitting/receiving terminal W of the data transmitting/receiving circuit 7. This pulse signal is transmitted via the capacitor C1 to the level discriminator circuit (3).
1, when data is being received from the telephone, the ■ potential applied to the gate terminal Y of the microprocessor 1 is Since the signal is not input to the data input terminal Z, the transistor Q1
, Q2 are 01·F and do not affect the received pulse signal. FIG. 4 shows the data transmitting/receiving circuit 7.
FIG. 8 is a diagram showing the operating state of No.8. The above received pulse signal is
Since it is not always fixed which control line the corresponding telephone is connected to (the telephone number code may be swapped), the data is not necessarily received by the data transmitting/receiving circuit 7; Even if the signal is input, it is applied to the microprocessor 1 in the same manner as described above.

As explained above, according to the present invention, a large number of key telephones are divided into a plurality of groups, data transmission/reception circuits are provided in the main device in correspondence with the groups, and control lines are shared by each group to transmit the data. Since it is connected to the transmitter/receiver circuit, the number of cable cores can be reduced accordingly. .

[Brief explanation of drawings]

Figures 1 to 4 are diagrams showing embodiments of the present invention.
2 is a block diagram of the button telephone device, FIG. 2 is a diagram showing the data format, FIG. 3 is a diagram showing the data transmitting and receiving circuit /fz, and FIG. 4 is a diagram showing the operation of the data transmitting and receiving circuit. M l> ,, Main device Ill A ,, T A2~
T In-button telephone 1...Microprocessor 5...Call path cross point switch 7.8...Data transmitting/receiving circuit 17...Talking line 18...Saisen Co., Ltd. Daiko Denki Seisakusho, Director and President Higo Inusuke

Claims (1)

[Claims] A button telephone in which a device consisting of a plurality of button telephones and a main device accommodates a plurality of office lines, and the telephones and the main device are connected by a pair of talking lines and a pair of control lines. In the device, the plurality of button telephones are divided into a plurality of groups, and data transmission/reception circuits are provided in the main device corresponding to the groups, and the pair of control lines are shared by each group. A button telephone device characterized in that it is connected to.