JPH038157B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telephone exchange that utilizes the control and processing functions of a personal computer to perform exchange connection operations.

Conventionally, personal computers have generally been limited to inputting, outputting, and processing information from devices such as floppy disks and typewriters, and telephone exchanges have generally been limited to switching and connecting telephones, etc. However, a device that combines both of these functions has not yet been put into practical use.

However, in recent years, with the rapid introduction of office automation, home automation, etc., there is a need for a system that has both input/output/processing functions for various information and telephone exchange functions in order to enhance these systems. gender was recognized, and its realization was strongly desired.

SUMMARY OF THE INVENTION In view of the above-mentioned lack of conventional technology, an object of the present invention is to provide a telephone exchange that can economically realize a telephone exchange function by utilizing the input/output and processing functions of various information by a personal computer. .

The features of the present invention include a line circuit that corresponds to each telephone and has call detection, ringing signal sending, call status monitoring, and other necessary functions; and various trunk circuits that have other necessary communication functions between telephones; A tone generation circuit that generates various signal tones necessary for exchange connection operation, a switch circuit that can make exchange connection between the line circuit and the trunk circuit or the tone generation circuit, and selection signals for each of the circuits. an address decoder for transmitting the selection signal, and a predetermined telephone exchange program stored in a microprocessor of a personal computer having a standard bus causes the address decoder to transmit the address necessary for transmitting the selection signal through the standard bus. The telephone exchange receives the decoder, transmits and receives data signals and control signals related to the line circuit, the trunk circuit, and the switch circuit, and performs predetermined exchange connection operations.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram of an embodiment of a telephone exchange according to the present invention, and FIG. 2 is a program configuration diagram thereof.

Here, 1-0 to 1-n are telephones (TEL),
2-0 to 2-n relate to the switching circuit section, and the telephone 1
-0 to 1-n, line circuits (LC) have call detection, call signal sending, call status monitoring and other required functions; IOT), 4 is
Similarly, a tone generation circuit (TG) that generates dial tone, ring back tone, busy tone and other signal tones,
Similarly, 5 is a switch circuit (SW), and for example, line circuits 2-0 to 2-0 are connected to the (n+1) horizontal path.
2-n, and the trunk 3 and other trunk circuits in the local station and the tone generation circuit 4 are accommodated in the vertical path (m+1), and the cross point switch XP0 is
0~XP0n, XP10~XP1n,..., XPm0~
Item 6 is one that can perform one-stage exchange connection between the above accommodation circuits by opening and closing XPmn.
Similarly, the address decoder (ADEC) 7A that sends selection signals to each of the above circuits is as follows.
Similarly, the address bus lines (ADD), 7B, 7C for the address decoder 6 are the data bus lines (DAT) for the line circuits 2-0 to 2-n, the local trunk 3, the tone generation circuit 4, and the switch circuit 5. The control bus line (CNT) 7D is also a power bus line (POW) 8 that supplies the required power to each of the above circuits.
9 is a standard bus (BUS) of a personal computer to which each of the above bus lines is connected by pins, for example, in the S-100 format or IEEE-696 format, and 9 is a microprocessor of the personal computer. (MPU).

Hereafter, telephone 1-0 makes a call, and telephone 1
-n will be connected to make a phone call.

First, when the telephone 1-0 is taken off-hook, the line circuit 1-0 prepares to send data to that effect (for example, the number "15") onto the data bus line 7B upon detection of the call. I'm waiting.

On the other hand, the microprocessor 9 operates for a predetermined period of time (for example,
Line circuit 1- via standard bus 8 every 8ms)
In response to the sending of a read signal for 0 through the control bus line 7C, the calling data is read from the line circuit 1-0 through the data bus line 7B.

At this time, the selection signal SEL relating to the circuit designation for the line circuit 1-0 is sent by decoding the address data from the microprocessor 9 by the address decoder 6 before reading the above-mentioned calling data.

Depending on the scale of the circuit whose status is to be read and controlled, the address data may be one piece for each circuit, or the circuit may be divided into the desired number of parts and allocated to each part or to each function. There may be multiple cases.

When reading and controlling the status of each circuit, the above address data is always sent before sending the data signal and control signal (read signal or write signal) to the data bus line 7B and control bus line 7C, and the address data is sent to the address decoder. The selection signal SEL is sent to the circuit from 6, but
Hereinafter, each explanation (description) will be omitted.

After reading the call data, the microprocessor 9 recognizes the call from the telephone 1-0 through the operation of the program 10, and sends the data to the tone generation circuit 4 and switch circuit 5, respectively. Bus line 7B, control bus line 7
A predetermined data signal and a control signal are sent through C, the next connection is set, and a dial tone is sent from the tone generating circuit 4 to the telephone set 1-0.

Tone generation circuit 4 - cross point XPm0 of switch circuit 5 - line circuit 2 - 0.

Subsequently, after hearing the dial tone, the caller dials the telephone number of the desired destination telephone 1-n from the telephone 1-0, and the dial signal is received by the line circuit 1-0, as is well known. , the data is read by the microprocessor 9 in the same way as the above-mentioned call data.

As a result, the microprocessor 9 starts the program 11, sends out predetermined data signals and control signals, controls the line circuit 2-n, and checks that the telephone 1-n is not busy (is idle). After confirming the above, the telephone 1-n is made to send a ringing signal, and the tone generating circuit 4 is controlled to make the telephone 1-0 switch from the dial tone to the ringback tone.

When the called party answers and the telephone 1-n is taken off-hook, the line circuit 2-n performs, for example, DC loop detection as is well known, and the response data is read by the microprocessor 9 in the same manner as described above. It will be done.

As a result, the microprocessor 9 restores the tone generation circuit 4 and the switch circuit 5 (crosspoint switch
-n to stop the transmission of the ringing signal, the telephones 1-0 and 1
Control is performed to perform the following connection between -n.

Telephone 1-0-Line circuit 2-0-Cross point XP20-Internal trunk 3-Cross point XP3n-Line circuit 2-n-Telephone 1-
n.

As a result, a call can be made between the telephones 1-0 and 1-n, and the program 12 is notified of this fact.

From then on, the microprocessor 9 executes the program 1.
2, the status of the line circuits 2-0, 2-n is read and monitored at predetermined intervals (e.g., 8 ms), and, for example, the telephones 1-0,
When the end of the call is detected by detecting the disconnection of the DC loop of 1-n, predetermined data signals and control signals are sent.
Disconnect and restore the trunk 3 and switch circuit 5 (crosspoint switches XP20, 3n) within the own station.

After that, the microprocessor 9 starts the program 13, checks whether or not there is a malfunction in each circuit, and if there is an abnormality, stops the replacement operation and displays a fault display, and if there is no abnormality, further Prepare for call detection, call connection, call end operations, etc.

In the above embodiment, only the connection within the local office has been described, but it is clear that by providing a central office line trunk and a central office line answering device similar to the internal trunk 3, central office line calls can be made. .

In addition, when the number of telephones is small (for example, 10 or less), the above-mentioned switching circuit can be mounted on only one package, and only a pin insertion connection to the standard bus 8 is required, which requires less mounting space. The number of units required is extremely small, and maintenance and operation are simple.

As described above in detail, according to the present invention, a telephone exchange can be simply and economically attached to a personal computer by utilizing the input/output and processing functions of various information, so that the telephone exchange function is Remarkable effects can be obtained in fields that require both information input/output and processing functions at the same time, such as office automation and home automation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of a telephone exchange according to the present invention, and FIG. 2 is a program configuration diagram thereof. 1-0 to 1-n...Telephone, 2-0 to 2-n...Line circuit, 3...Trunk within own office, 4...Tone generation circuit, 5...Switch circuit, 6...Address decoder, 7A...Address bus line, 7B ...Data bus line, 7C...Control bus line, 7D
...Power bus line, 8...Standard bus, 9...Microprocessor.

Claims (1)

[Claims] 1. A line circuit to which at least one telephone is connected, which detects calls, sends out a ringing signal, and monitors the call status of the telephone, a trunk circuit which has at least the necessary communication functions between telephones, and a switching connection operation. A tone generation circuit that generates various necessary signal tones,
a switch circuit capable of making an exchange connection between the line circuit and the trunk circuit or the tone generating circuit; an address conversion means for sending a selection signal to each of the circuits; and at least the line circuit and the trunk circuit. , a microprocessor of a computer having a general-purpose standard bus connected to the tone generating circuit, the switch circuit, and the address conversion means, and a control signal received by the microprocessor via the standard bus, A telephone exchange program in the microprocessor for generating signals for driving the address conversion means, and a data signal related to the line circuit, the trunk circuit, and the switch circuit by driving the address conversion means. A telephone exchange characterized by performing an exchange connection operation.