KR100239069B1 - Apparatus for combing central office trunk and ring down trunk in a private branch exchange - Google Patents

Abstract

The present invention relates to a CO relay line and a ring down of a private exchange suitable for configuring a Central Office (hereinafter referred to as CO) relay line device and a ring down relay line device of a private exchange on one board and processing as a single board. It is related to a trunk line apparatus, and in the conventional technology, the CO trunk line function and the ring down relay line function are separated, and the PBA (Printed Board Assembly) of the conventional private exchanger has only the CO trunk line function or the ring down relay line function. There was an inefficiency of the exchange facility by accommodating the down subscriber or the CO trunk line subscriber, respectively, and when receiving the ring down subscriber in the CO trunk line PBA, there was a drawback that there was no detection method for the termination signal. Combined with ring signal detection and ring signal transmission circuits during town trunk line calls By making available, by receiving all of the subscribers belonging to the subscriber and the CO trunk belongs to the trunk-down ring into a single board, to which can improve the above-mentioned drawbacks.

Description

Combined CO trunk line and ring-down trunk line of private exchange

The present invention relates to a central office (hereinafter referred to as CO) relay line and ring down relay line combined device of a private exchange, and in particular, a CO relay line and a ring down relay line device in a private exchange are configured on one board. The present invention relates to a CO relay line and a ring down relay line device of a private exchange which are processed by one board.

As is well known in the art, a CO trunk line is an analog branch line card of a Private Branch eXchange (PBX) that acts like a telephone, connected to a private subscriber line with the polarity reversal capability of a national exchange at a private exchange, ring signal detection, It consists of a polarity inversion detection function, an occupancy function, a two-line and four-line conversion function, and a coding and decoding unit (hereinafter referred to as a coder / decoder).

The ring down relay line consists of a ring signal detection function, a two-wire and four-wire conversion function, and a codec function. The ring signal detection function is used in a hook-on state and a hook-off state. All must be detected.

That is, in the case of a ring down relay line, the ring signal detection circuit on the incoming call and the ring signal detection circuit on the call are separated and toggled so that the call path is connected by the first ring signal and the called subscriber hooks on the second line. The call path of the calling subscriber is released by the ring signal.

In the case of the ring town relay line, the incoming ring detection circuit confirms the request via the call and informs the calling subscriber of the end of the call through the ring detection circuit during the call.

However, in the conventional technology, the CO trunk line function and the ring down relay line function are separated, and the PBA (Printed Board Assembly) of the conventional private exchange has only the CO relay line function or the ring down relay line function. There was an inefficiency of the switching equipment by accommodating each subscriber, and there was a defect that there was no detection method for the termination signal when accommodating the ring down subscriber in the CO trunk PBA.

The present invention has been made in view of the above-described drawbacks of the prior art, and an object of the present invention is to provide a device that combines two functions into one PBA to increase the efficiency of the service.

In order to achieve the above object, the present invention provides a ring transmitter for transmitting a ring signal to a telephone of a central office (CO) trunk line subscriber that is a ring town trunk line subscriber or a general private subscriber as a tip / ring line, and a ring transmitter. Ring signal detection unit to detect incoming ring signal when incoming call is connected with subscriber connected to ring-down relay line, and to detect incoming call demand of outgoing subscriber to make call. A call state ring signal detection unit configured to terminate the call by notifying the calling subscriber of the call when the calling party terminates the call when the calling subscriber is hooked on when connected to the subscriber connected to the ring down relay line. A dial pulse loop is generated by receiving power from a preset exchange input from a transformer. It is connected to the occupancy and polarity detection unit, and to the occupancy and polarity detection unit so that the power of the exchange can be used and the polarity is detected at regular intervals so that the subscriber connected to the tip line and the ring line can charge according to the time used. As a two-wire signal input from the exchange end is input to the CO relay line and the ring-down relay cable, the corresponding two-wire signal is converted into a 4-wire signal, on the contrary, Receives a pulse matching signal output from an exchanger and an impedance matching unit for matching an impedance required for the connection between a 2-wire and 4-wire conversion unit for converting a 4-wire signal into a 2-wire signal and preventing overcurrent from flowing. To decode and convert the analog data received from the ring and tip lines into two or four wires. And to receive from the impedance matching unit into a digital coded signal to provide a private branch exchange trunks and CO ring-down Trunk Combine device including the CODEC for outputting to the exchange.

1 is a block configuration diagram suitable for explaining a combined device of a CO relay line and a ring down relay line of a private exchange according to the present invention;

FIG. 2 is a block diagram illustrating a detailed block diagram of a call state ring detector according to FIG. 1; FIG.

<Description of the code | symbol about the principal part of drawing>

110: ring transmitting unit 120: ring signal detection unit incoming

130: call state ring signal detection unit 140: occupancy and polarity detection unit

150: 2-wire / 4-wire conversion unit 160: impedance matching unit

170: encoding and decoding unit 202: first order rectifying unit

204: full wave rectifying unit 206: voice signal removing unit

208: ring signal detection unit

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings.

The configuration of the present invention will be described with reference to Fig. 1, a ring transmitter 110 for transmitting a ring signal to a telephone of a CO trunk line subscriber, which is a ring town relay line subscriber or a general private subscriber, as a tip / ring line, and a CO relay line. Ring signal detection unit 120 to detect incoming ring signal when connected with the line subscriber, and when the call is connected to the subscriber connected to the ring-down relay line, the incoming signal is detected by detecting the occupancy request of the calling subscriber; When the calling party terminates the call by hooking up when connected to the subscriber connected to the ring-down relay line, a call state ring signal detection unit for terminating the call by notifying the calling subscriber of the call in the call state by the ring transmitting circuit ( 130) and the power supply of the exchanger input from the transformer to be input to form a dial pulse loop. Occupancy and polarity detection unit 140 to enable the use of the power supply, and to detect the polarity at regular intervals to charge according to the time used by the subscriber connected to the tip line and the ring line, and a two-wire type input from the exchange stage as a transformer Signal is inputted to the CO relay and ring-down relay cable, so that the 2-wire signal is converted into 4-wire signal, and on the contrary, the 4-wire signal input from the CO relay and ring-down relay cable is converted into 2-wire signal. Receiving and decoding pulse code modulation data output from an exchanger and an impedance matching unit 160 for matching an impedance required for connection between a circuit, an impedance matching unit 160 to prevent an overcurrent from flowing And receive analog data received from the ring and tip wires from the 2-wire / 4-wire converter 150 and the impedance matcher 160. By encoding a digital signal comprising: a CODEC (170) for outputting to the exchange.

Referring to Figure 1 in detail with respect to the block diagram suitable for explaining the combined device of the CO relay line and the ring down relay line of the private exchange in accordance with the present invention, the ring transmitting unit 110 is a ring town relay line subscriber or general private It transmits ring signal coming to subscriber's CO trunk line subscriber's phone to tip / ring line, and does not affect impedance on the path of call.

When incoming, the ring signal detection unit 120 detects a ring signal when connected to the CO trunk line subscriber to receive the call. When the call is connected to a subscriber connected to the ring down relay line, the ring signal detection unit 120 detects the occupancy request of the calling subscriber so that the call is made. do.

In the case of a ring down relay line, the ring signal detection circuit is separated from the incoming call and the ring signal detection circuit is in communication, so that the ring signal can be transmitted even during a call.

The call state ring signal detection unit 130 is irrelevant to the CO trunk line subscriber. When the call subscriber is hooked up and terminates the call when connected to the subscriber connected to the ring down relay line, the call transmission ring circuit detects the call in the call state. The call is terminated by notifying the end of the call.

Occupancy and polarity detector 140 receives the power of the transformer, that is, the two-wire / four-wire converter 150 to form a dial pulse loop to use the power of the exchange, and the polarity at regular intervals This function enables the billing based on the time used by the subscriber connected to the tip line and the ring line.

The 2-wire / 4-wire conversion unit 150 is a transformer. The 2-wire signal input from the exchange stage is input to the CO relay line and the ring-down repeater, so that the 2-wire signal is converted into a 4-wire signal. In other words, the 4-wire signal input from the CO relay and ring-down repeater devices is converted into a 2-wire signal.

The impedance matching unit 160 matches an impedance necessary for the connection between circuits to prevent an overcurrent from flowing.

It is designed to be able to change according to the situation of each country when impedance matching. For example, the impedance when matching impedance in Korea is 600 Ω Is set.

The CODEC 170 receives and decodes the pulse code modulation data output from the exchange and receives analog data received from the ring and tip lines from the 2-wire / 4-wire conversion unit 150 and the impedance matching unit 160 to convert them into digital signals. Encode and output to the exchange.

Referring to FIG. 2, a detailed block diagram illustrating a detailed block diagram of a call state ring detector according to FIG. 1 will be described in detail.

The ring signal introduced through the tip line and the ring line to the primary rectifying unit 202 passes through the primary rectifying unit 202 composed of a bridge diode and is first rectified voltage.

Rectified through the primary rectifying unit 202 to maintain a constant DC voltage while passing through the full-wave rectifying unit 204.

The signal through the full wave rectifier 204 uses a high pass filter so that the low signal of the voice level is not passed through the voice signal removing unit 206 so that the signal is not detected by the voice signal during the call. use.

In the ring signal detection unit 208, the ring signal detected by the primary detection circuit is held by the detection holding circuit at predetermined time intervals so that the ring signal detection unit can read the ring signal.

The principles of the invention have been described above in connection with specific devices, which are described by way of example only, and are not limited to the spirit of the invention as described in the appended claims.

As described above, the present invention provides a combination of a ring signal detection function and a ring signal transmitting circuit when a ring town relay line is connected to an existing CO trunk line, thereby enabling the subscriber and co relay lines belonging to the ring down relay line to be connected to a single board. It is effective to accept all subscribers belonging to it.

Claims (1)

A ring transmitter 110 for transmitting a ring signal to a telephone line of a ring town relay line subscriber or a central office subscriber line that is a general private subscriber to a telephone line; When connected with the ring transmitter 110 and connected to the CO relay line subscriber, the ring signal is detected and the incoming call is made. If the call is connected to the subscriber connected to the ring down relay line, the call is made by detecting the occupancy request of the calling subscriber. Ring signal detection unit 120 to receive a call; When connected to the ring signal detection unit 120 and connected to the subscriber connected to the ring-down relay line, when the calling subscriber terminates the call by hooking on, the call state ring signal to terminate the call by notifying the calling subscriber of the termination of the call. Detection unit 130; It is possible to use the power of the exchange by receiving the power of a preset exchange input from a transformer to form a dial pulse loop, and detect the polarity at regular intervals to charge according to the time used by the subscriber connected to the tip line and the ring line. Occupancy and polarity detection unit 140 to enable the; It is connected to the occupancy and polarity detection unit 140, and as a transformer, the two-wire signal input from the exchange end is input to the CO relay line and the ring-down relay line combined device so that the two-wire signal is converted into a four-wire signal On the contrary, when the 4-wire signal input from the CO relay line and the ring-down relay cable combined device is converted into the 2-wire signal, the impedance required for the connection between the 2-wire / 4 wire conversion unit 150 and the circuit is matched. Impedance matching unit 160 to prevent; Receives and decodes pulse code modulated data output from the exchanger, and receives analog data received from ring and tip lines from the two-wire and four-wire conversion unit 150 and the impedance matching unit 160 to encode the digital signal. Combined apparatus for a CO trunk line and a ring down trunk line of a private exchange including a CODEC (170) output to an exchange.

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