JPS6013559B2 - Automatic telephone exchange sender control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sender control system, and more particularly to a sender control system in an electronic exchange in which the sender controls pulse transmission of a trunk connected to the sender.

Generally, when transmitting dial pulses between stations between switching machines, a pulse transmission circuit (hereinafter abbreviated as a sender) is provided for the purpose of improving line usage efficiency and correcting pulse relay distortion. .

In other words, the dial pulse from the telephone and the dial pulse from the pond exchange during relay connection are once sent to the pulse receiving circuit (
After receiving and accumulating the data in the register), it is sent from the sender. In this case, the senders are required only when transmitting dial pulses and are not used during a call, so the number of senders is determined based on traffic conditions and with a certain call loss rate in mind. Therefore, a means for connecting multiple senders to an arbitrary line is required. In the conventional sender control method, pulses are sent by directly connecting and disconnecting the line with a relay installed inside the sender, so a mechanical switch is required to connect multiple senders to any line. be.

For this purpose, a method is used in which the sender is housed on the line side of the communication path switch and switching is performed by the communication path switch, or a system is used in which the sender is accommodated in the trunk side of the communication path and switching is performed using a dedicated switch. However, in the system using a call connection switch, the efficiency of the communication path is specified, which limits the number of telephone sets that can be accommodated, and the system in which a dedicated switch is installed has the disadvantage of being large and expensive. There is. An object of the present invention is to solve such drawbacks, that is, to eliminate the need for mechanical changeover switches by configuring the sender with an electronic circuit and connecting multiple trunks and multiple senders in a time-sharing manner. It is in.

In the present invention, a pulse sending unit, which was conventionally provided inside a sender, is provided inside each trunk, and the sender is configured with an electronic circuit for controlling the counting of sending pulses, make rate, pulse speed, minimum pause, etc. A feature of the present invention is that a plurality of trunks and a plurality of senders are connected by a common signal line, and an arbitrary sender and an arbitrary trunk are connected by using the signal line in a time-sharing manner. The system includes a plurality of trunks including a holding circuit having a data input terminal and a gate signal input terminal, a pulse sending circuit that sends out pulses based on the operation and recovery of the holding circuit, and a storage circuit that stores information necessary for pulse sending control. a plurality of transmitters provided, a data input terminal of a holding circuit of the plurality of trunks and a common signal line commonly connected to the plurality of senders, and a common signal line provided in common to the plurality of senders and connected to each of the plurality of trunks; a plurality of gate signal lines correspondingly connected to gate signal input terminals of holding circuits of the plurality of trunks, from the sender to the common signal line and the connection destination of the sender at a time allocated to the sender. The purpose is to send data and gate signals for controlling the operation and restoration of the holding circuit of the trunk to which the previous sender is connected, respectively, to the gate signal line corresponding to the trunk.

According to the present invention, the sender can be made smaller and a mechanical changeover switch can be eliminated. A detailed description will be given below with reference to the drawings.

FIGS. 1 and 2 are relay system diagrams illustrating a subordinate sender control system.

In FIG. 1, SW represents a channel switch, SND a sender, TRK a trunk, and MKR a marker, and the sender is connected to any trunk by the channel switch. FIG. 2 also shows a conventional example in which an arbitrary sender and an arbitrary trunk are connected via a dedicated sub-switch SSW. FIG. 3 is a block diagram showing an embodiment of the present invention, in which SW is a communication path switch, TRK is a trunk, SND is a sender, and D is a common signal line, where a plurality of trunks TRK and a plurality of senders SND are a common signal line. D
connected by.

Figure 4 is a circuit diagram of a trunk in one embodiment of the present invention, where A is a relay for supplying communication current, C0 and CI are capacitors for DC blocking, and are used to form a DC loop for the opposite station and attenuate communication signals. A holding circuit consisting of a coil for holding down, H'ma electronic circuit, P is "1" of the holding circuit
, the relay operates and recovers depending on the state of "0", and connects intermittently to the opposite station.

Further, D is a data line to the holding circuit, and g is a gate.
The holding circuit date is set to "1" or "0" by the data and gate signal from the sender circuit, and the relay P is activated and restored, and the loop is interrupted by the contact P.
Sends a dial pulse to the opposite station. Although we have explained the case where such a trunk uses a signaling method that sends dial pulses by intermittent loops, it can also be used for other signaling methods, such as a method that sends dial pulses to the opposite station by intermittent ground air. This can be achieved on the same aircraft by doing so.
In short, a necessary condition for carrying out the present invention is that a holding circuit is designed inside the trunk and pulses can be sent out depending on the state of the holding circuit. FIG. 5 is a block diagram of a detailed embodiment of the sender circuit according to the present invention.

SCC is sender common control section, CC is central control circuit, SN
D indicates a sender. In addition, each sender stores information such as the trunk number TKN of the connection destination, the sending number PC, the counter TC for creating the pulse speed and make rate, the data d set in the trunk holding circuit, and the control information C. . Now, suppose that a request to send a dial pulse to the line occurs, the central control circuit CC selects and captures the empty sender SND, and obtains the trunk number TKN of the connection destination, the sending number PC, and the control necessary for pulse sending control. Information C is set to the captured sender SNDj under the control of the sender common control static SCC. The sender common control unit SCC controls each sender SND at regular intervals, and each sender sends a gate signal g to the holding circuit of the trunk to which it is connected at the assigned time (i.e., time slot). At the same time, data "1" and "0" are sent to the common signal line D.
FIG. 6 shows a time chart in the trunk of the present invention.

Now, considering the case where sender j SNDj is connected to trunk iTRKi, common signal line D is temporally allocated to each sender and transmits data “1” and “0” at the time (i.e., time slot) of sender iSNDi. By sending the gate signal g to the holding circuit of the trunk iTRKi at the same time, the holding circuit date can be set to "1" and "0".In this way, the holding circuit of the trunk can be set to "1"
, "0" can be set, but the specified number of pulses can be sent out at the specified speed and make rate based on the information of the sending number PC, counter TC, and control information C provided in each sender. I can do it. FIG. 7 shows a timing chart of the sender in the present invention.

The counter TC is counted periodically and compared with the specified make time and break time, and by specifying data "1" and "0" to be set in the trunk holding circuit, the specified speed is set. It is possible to create pulses with a make rate of 1 and 1, and to send out a specified number of pulses by subtracting the value of the sending number PC each time one pulse is sent. As explained above, the present invention relates to a sender control system for an automatic telephone exchange, and includes a holding circuit made up of a holding circuit made up of an electronic circuit inside the trunk, and the holding circuit "1" or " A pulse is sent to the opposite station by operating and restoring the relay in the "0" state.The holding circuit is set by the sender, and is connected to multiple sender circuits in a time-sharing manner. , the selected sender sends gating signals and configuration data to the holding circuit at the allocated times (i.e., time slots) for the designated trunk.

Therefore, a plurality of trunks and a plurality of senders can be connected without using a mechanical switch, and the sender can be configured with an electronic circuit by performing pulse transmission inside the trunk. It should be noted that the present invention is not limited to the above-described embodiments, but it is clear that various additions and changes can be made.

[Brief explanation of drawings]

1 and 2 are relay system diagrams explaining a subordinate sender control system, FIG. 3 is a system diagram showing an embodiment of the present invention, and FIG. 4 is a trunk circuit diagram in an embodiment of the present invention. FIG. 5 is a block diagram centered on the sender circuit in an embodiment of the present invention, and FIGS. 6 and 7 are operational diagrams of the trunk and sender control unit in the present invention. Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 7 Figure 5

Claims (1)

[Claims] 1. In a sender control system of an automatic telephone exchange in which a sender controls pulse transmission of a trunk connected to a plurality of senders in a time-sharing manner via a common signal line, a holding circuit having a data input terminal and a gate signal input terminal and the above-mentioned A plurality of trunks each having a pulse sending circuit that sends out pulses based on the operation and restoration of the holding circuit, a plurality of senders each having a memory circuit that stores information necessary to control the pulse sending of the trunks, and holding the plurality of trunks. a common signal line commonly connected to a data input terminal of the circuit and connected to each of the plurality of senders in a time slot assigned correspondingly to each of the plurality of senders; and a plurality of gate signal lines connected to gate signal input terminals of respective holding circuits of the plurality of trunks corresponding to each of the plurality of trunks, wherein the signal line is connected from the sender to the Data indicating the operation and recovery status set in the holding circuit of the trunk to which the sender is connected is sent to the common signal line, and at the same time, data is transmitted from the sender to the trunk to which the sender is connected in the time slot. To the gate signal line to
A sender of an automatic telephone exchange, characterized in that the sender controls pulse sending of a trunk to which the sender is connected by sending out a gate signal that sets the holding circuit to a state of operation and recovery indicated by the data. control method.