JPS5815388A - Telephone exchanger - Google Patents

Abstract

PURPOSE:To quickly select vacant lines, by providing a means storing the usage state of crossing points of vertical or horizontal paths in a crossbar switch for a control circuit of a telephone exchanger. CONSTITUTION:In a circuit controlling a crossbar switch, when a subscriber picks up a handset, since a microcomputer (not shown) of a marker section is connected to a vacant originating register, a terminals corresponding to the vertical path where a contact at cross points of the vertical and horizontal paths of the primary switch of the crossbar switch is opened and corresponding terminal 3 is made to ''0'' V, and a photocoupler 13 corresponding to the contact 13 is operative and a corresponding relay drive section 23 is activated. Thus, a busy detection contact 33 is closed, a terminal 53 is made to ''0'' V via a chattering preventing circuit, the display in use is made to the microcomputer, a driving contact 63 is closed with the driving section 23, a coil 73 of the crossbar switch is driven, the 3rd vertical path is selected and connected with a horizontal path from the subscriber.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telephone exchange apparatus, and more particularly to a circuit for controlling a crossbar switch of a wired telephone exchange using a microcomputer in a marker section.

Recent exchanges of this type incorporate microcomputers while also taking advantage of the characteristics of crossbar switches, so
It was extremely cheap and easy to use.However, there was no appropriate means for quickly selecting an available line and connecting the lines.

An object of the present invention is to provide a telephone switching device that can quickly select a route for an idle line.

Another object of the present invention is to provide a telephone exchange device that can reduce the complexity of processing performed by a microcombi operator. The present invention provides a telephone exchange device equipped with a crossbar switch for connecting subscribers via lines and a control circuit for controlling the crossbar switch, in which an intersection point of a vertical path or a horizontal path in the crossbar switch is provided. The telephone exchange apparatus is characterized in that the control circuit is provided with means for storing the usage state of the telephone.

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a portion that controls a crossbar switch. Input terminals 1 to 8 are output terminals of the microcomputer. Now, when the subscriber picks up the handset, the microcomputer must detect this and use the free line of the crossbar switch to connect to the free outgoing register (OROOM). Where the cross point contact between the vertical path and the horizontal path in the primary switch section of the crossbar switch is in an open (not used) state, the terminal corresponding to the vertical path, for example, the third terminal 3, is connected to a micro combination, - to set it to OV (grounded state). Among the photocouplers 11 to 18 provided to the terminals 1 to 8, the third photocoupler 13 operates. As a result, the third relay drive section 23 among the relay drive sections 21 to 28 operates. The third relay drive unit 23 brings the third busy detection contact 33 of the busy detection contacts 31 to 38 into a closed state (or open state), thereby causing the chattering prevention circuits 41 to 48
terminal 5 through the third chattering prevention circuit 43.
3 becomes Ov. Terminal 53 is input to the microcomputer. On the other hand, the third drive contact 63 among the drive contacts 61 to 68 is.

The third relay drive unit 23 brings it into the closed state.

Then, current flows through the third coil 73 among the coils 71 to 78 of the crossbar switch.゛Thus,
This means that the third vertical path among the vertical paths of the bus switch has been selected. That is, the third vertical path and the horizontal path from the subscriber are connected. Since the relay drive units 21 to 28 have a self-holding ability, there is no need to keep the third terminal 3 in OV during use, and it is not necessary to keep the third terminal 3 at OV during use.
All you have to do is input the pulse width into a microcomputer.

The fact that the third vertical path is now in use is detected by the microcomputer through the third input terminal. That is, since the microcomputer does not need to be stored so that the input terminal 3 is maintained at OVk throughout the period of use, the microcomputer can be used effectively. When the use state is finished, the C line of the transmission register that was being used is opened, and this causes the third relay drive unit 23
Since the self-holding state is released, the state immediately returns to the original state. Such control is performed mainly on the vertical path of the primary switch (ppw) of the i-bus switch. The vertical paths of the second switches (SSW) are provided corresponding to respective transmission registers. Since the contact of the relay of the C line provided in this transmit register is closed, by detecting this C line with a microphone, an empty transmit register can be selected. For example, it can be distinguished from a second originating register. In this way, the third vertical path of the primary switch and the second vertical path of the second switch are connected, providing communication between the subscriber and the second originating register.

The second originating register will be connected to the trunk responsible for the subscriber's calls. If an intra-office trunk is selected, it will lead to other subscribers through another part of the crossbar switch.

FIG. 2 is a circuit diagram showing one of the first seven automatic registers and one of the relay drive sections. When the terminal 87 is set to Ov by the computer, the light emitting diode of the photocoupler 80 connected to the -24V terminal 81 via a resistor emits light, thereby making the transistor conductive.

When the relay coil 83 is inserted between the -24V terminal 82 and ground, current flows through it, and the contact 88
closes. Therefore, relay coil 83 is set to a self-holding state. FIG. 3 shows one of the drive contacts of FIG. 1 and one of the coils (HM) of the crossbar switch.

Contact 84 driven by relay coil 83 closes;
The coil 85 of a predetermined crossbar switch is activated, and the corresponding cross contacts are closed.

As described above, according to this BAK, the air crossing contacts of the primary switch and the air crossing contacts of the second switch can be monitored using the microcombi, so the microphone can monitor the usage status of the C line of the link part. Since it is possible to input both combinations and evenings, connection route selection can be carried out quickly.

Note that the input terminals 1 to 8 are not limited to these (the same number as the number of vertical paths of the PSW is provided).

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the driving part of a cross-section switch according to an embodiment of the present invention. FIG. 2 is a circuit diagram showing one of the photocouplers and one of the relay drive sections shown in FIG. 1. FIG. 3 is a circuit diagram showing one of the drive contacts and one of the coils of the crossbar switch of FIG. 1. In addition, in the figure. l to 8---input terminals, 11 to 18---photocouplers, 21 to 28---relay drive units,
31 to 38...-Busy detection contacts, 41 to 48
-1 chattering prevention circuit, 51 to 58---1 output -24v terminal, 80...-7 Otoka, plastic, 83-.
・ Curtain: Relay coil, 84: Contact, 85: Crossbar switch coil.

Claims (1)

[Claims] In a telephone exchange equipped with a crossbar switch for connecting subscribers by line and a control circuit for controlling the four-substrate switch, the use state of the intersection of a vertical path or a horizontal path in the crossbar switch. A telephone exchange apparatus characterized in that the control circuit is provided with means for storing.