JPS5852766Y2 - switch frame of telephone exchange equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch frame for a telephone exchange device, and particularly to a switch frame for a private branch exchange or a button telephone device.

A conventional and general switch frame of this kind is explained according to Fig. 1. In the figure, X is a switch matrix,
CO is the office line, TRK is the office line circuit with the office line CO, LC' is the interface circuit with telephone T, OR is the dial pulse receiving circuit from the telephone, O8 is the dial pulse sending circuit to the office line, TNI, TN2. is the signal tone circuit, and the construction is the extension telephone circuit.

In a switch frame having such a configuration, for example, in a dial tone connection, the first telephone T and the dial pulse receiving circuit OR are connected via the switch matrix X, and in an extension call connection, the first telephone T is connected via the switch matrix A telephone T, an extension call circuit IT, and a second telephone T are connected, and when connecting a signal tone such as a busy tone, the first telephone T and the first signal tone circuit TN1 are connected via a switch matrix X.
In a central office line call connection, the first telephone T and the central office line circuit TRK are connected via the switch matrix Connect the signal tone circuit TN2 of 2, and connect the station line C.
In the dial transmission connection for transmitting a dial signal to O, the office line CO and the second signal tone circuit TN2 are connected via the switch matrix X.

In the switch frame described above, the connection is made through the switch matrix X and the control logic can be simplified, but the dial pulse receiving circuit OR and the dial pulse sending circuit O
8 or connection with signal tone circuit TN2, dial pulse sending circuit and signal tone circuit TN1, or intra-office communication circuit IT
Although the connection is not used in this switch frame, it is provided as hardware, which has the disadvantage of being economically expensive.

Also, with this switch frame, only two-wire wiring is provided for each phone; for example, when the first phone and second phone are busy, a call is received from the third phone to the first phone. Even if there is, there is no means for communicating between the third telephone and the first telephone, and there is a drawback that the call processing capacity is low.

In view of the above points, the present invention was developed to solve these shortcomings.The purpose of this invention is to eliminate the redundancy of the switch frame hardware, making it more economical and compact, and improving the functionality of the switch frame. To provide a means for improving the call processing ability by providing two call paths for each telephone to allow simultaneous calls.

In order to achieve this purpose, the present invention is designed such that the first switch matrix, which has a large amount of hardware, connects only the first voice circuit of the telephone, the central office line circuit, and the extension communication circuit, and the signal tone and dial pulse sending circuit. In addition to providing the required number of minimum small switch matrices that can be connected only to the necessary circuits, either the office line circuit or the extension communication circuit, a switch matrix is provided to connect the extension communication circuit and the second audio circuit of the telephone. This is a switch matrix format.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing an embodiment of the switch frame format of the present invention.

In FIG. 2, the same parts as in FIG. A second switch matrix with the first signal tone circuit TN1 connected to one side, and X3 connected to the extension telephone circuit IT on one side.
and a third switch matrix X4 is connected to the first switch matrix X1 and the second signal tone circuit TN2 is connected to the other side. 4th connected audio circuit LD
It is a switch matrix.

According to the present invention, for example, in a dial tone connection, a vacant extension telephone circuit IT is captured, and the second signal tone circuit TN2 is connected to the first voice circuit LC of the telephone that made the call via the third switch matrix X3.

The second signal tone circuit TN2 is comprised of a circuit for receiving a dial signal and transmitting a dial tone, a circuit for transmitting only a dial tone, a circuit for transmitting a busy tone, etc., and is configured to turn on the first switch when necessary. It is installed to send an audio frequency signal tone to the telephone via the matrix X1 and the third switch matrix X3.

For extension call connection, the vacant extension call circuit IT in the first switch matrix X1 and the first telephone first voice circuit LC
and the intersection of the first audio circuit LD of the second telephone are closed.

For the busy tone connection, create the same route as for the dial tone connection.

In the office line call connection, the intersection of the office line circuit TRK and the telephone first audio circuit LC in the first switch matrix X1 is closed.

When transmitting a button-type dial signal to a central office line, for example, the telephone T transmits the one-digit data transferred to the control section of the main device by digital transmission to the signal tone circuit TN1, and then transmits it to the first switch matrix. By opening the intersection of X1 and closing the corresponding intersection of second switch matrix X2, a signal is sent to the station line circuit TRK.

When the transmission of the dial signal is completed, the intersection of the second switch matrix X2 is opened and the first switch matrix X1 is opened.
to close the intersection and restore call status.

The telephone second audio circuit LD may interface to the telephone speaker, or may interface to the telephone speaker and microphone.

In the latter case, the extension telephone circuit IT incorporates a hybrid circuit for 2-wire to 4-wire conversion, and the fourth switch matrix X4 is equipped to perform 4-wire switching.

By such means, the first telephone first audio circuit LC
From the first switch matrix A connection path to the microphone is created.

This means allows the called party to respond without any hassle.

In a connection in which incoming calls from a central office line or extension are announced with a ringer tone, if the third signal tone circuit TN3 and the telephone second audio circuit LD of the telephone T on the called side are connected in the fourth switch matrix X4, the speaker of the telephone T You can send a signal tone to.

When the telephone T is connected to listen to calls on the office line CO through the speaker, the switch S connecting the telephone first audio circuit LC and the telephone second audio circuit LD is closed.

According to the present invention, with the conventional switch frame, it was not possible to answer other calls while the handset was talking, but by using a specially arranged switch matrix, it is now possible to answer two calls at the same time. Even when it is installed, there is an advantage that the price does not increase because the switch frame has no redundancy.

According to the present invention, there seems to be a problem with versatility in that connection processing becomes complicated due to an increase in the number of intersections included in the connection route and an increase in the types of switch matrices. By using one or more microcomputers that are inexpensive and have abundant control memory, combined with faster connection processing and lower prices, the overall price of the switch frame can be lowered and the switch matrix can be separated. This has the advantage of increasing responsiveness to service functions.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a switch frame of a conventional telephone exchange device, and FIG. 2 is a diagram showing an embodiment of the switch frame of the present invention. Xl...First switch matrix, Xl...
...Second switch matrix, TRK...Station line circuit, CO...Station line, TNl...First signal tone circuit, X3...Station line circuit 3 Switch matrix, ■T...Extension call circuit, TN2...
・Second signal tone circuit, X4...Fourth switch matrix, LC...Telephone first audio circuit, LD・
...Telephone second audio circuit, TN3...Third signal tone circuit, S...Switch, T...
・Telephone.

Claims (3)

[Scope of utility model registration request] (1) A first switch matrix in which the office line circuit is connected to seven groups of terminals on one side, the input terminal of the extension communication circuit is connected to the other group of terminals, and the first audio circuit of the telephone is connected to the other side. , a second switch matrix having one side connected to the terminal of the group to which the office line circuit of the first switch matrix is connected and a first signal tone circuit connected to the other side; and an extension communication circuit of the first switch matrix. One side is connected to the terminals of the 7 groups connected to the third signal tone circuit, and the second signal tone circuit is connected to the other side.
One side of the switch matrix is connected to the output terminal of the extension talking circuit and the third signal tone circuit, and the other side is connected to the second signal tone circuit of the telephone.
A switch frame for a telephone exchange device, characterized in that a fourth switch matrix for connecting an audio circuit is installed. (2) The extension call circuit is 2 from the first matrix switch.
A telephone switching device according to claim 1, characterized in that the fourth switch matrix has a 2-wire to 4-wire conversion device for converting a line into a 4-wire switching device, and the fourth switch matrix has a 4-wire switching device. switch frame. (3) Utility model registration claim No. 1, characterized in that it has a device that connects a first audio circuit of the telephone and a second audio circuit of the telephone, and transmits the audio from the first matrix switch to the second audio circuit of the telephone. A switch frame for the telephone exchange equipment according to item 1.