KR19990052897A - CO relay line and ring-down relay line of a private branch exchange - Google Patents

Abstract

The present invention relates to a CO trunk line and a ring down line of a private branch exchange suitable for forming a central office (hereinafter abbreviated as CO) trunk line apparatus and a ring-down trunk line apparatus of a PBX on one board In the related art, since the CO trunk line function and the ring-down trunk line function are separated from each other in the related art, and the printed board assembly (PBA) of the conventional private branch exchange has only the CO trunk line function or the ring-down trunk line function, There has been a drawback in that there is no detection method of the termination signal when the ring down subscriber is received in the CO trunk line PBA. However, in the present invention, When the ring signal detection function and the ring signal transmission circuit are added to the trunk line, 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

CO relay line and ring-down relay line of a private branch exchange

The present invention relates to a central office (hereinafter abbreviated as CO) trunk line and a ring down trunk line of a private branch exchange, and more particularly to a trunk line relay apparatus and a ring down trunk line apparatus in a private branch exchange, And a device for both a CO trunk line and a ring-down trunk line of a private branch exchange that processes a single board.

As is well known in the art, a CO trunk line is an analog trunk line card of a PBX (Private Branch eXchange) connected to a general subscriber line having a polarity reversing function of a public switching center in a private branch exchange, A polarity inversion detection function, an occupancy function, a 2-line / 4-line conversion function, and a coding / decoding unit (CODEC) function.

In the case of the ring-down trunk line, the ring signal detection function, the 2-wire / 4-wire conversion function and the CODEC function are provided. The ring signal detection function is provided in a hook- on state and a hook- All should be detected.

That is, in the case of the ring-down trunk line, the ring signal detecting circuit and the ring signal detecting circuit on the call are separated from each other, toggle the ring signal detecting circuit and connect the path of the call by the first ring signal, and when the called subscriber hooks on, And releases the call channel of the calling subscriber by the ring signal.

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

However, in the conventional technology, since the CO trunk line function and the ring down trunk line function are separated and the PBA (Printed Board Assembly) of the conventional private branch exchange has only the CO trunk line function or the ring down trunk line function, There is a drawback in that there is no detection method of the termination signal when the ring down subscriber is received from the CO trunk line PBA due to the inefficiency of the exchange facility due to accommodating each subscriber.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the drawbacks of the prior art described above, and it is an object of the present invention to provide an apparatus for enhancing service efficiency by combining functions of two functions with one PBA.

In order to achieve the above-mentioned object, the present invention provides a telephone system comprising: a ring transmission section for transmitting a ring signal incoming to a telephone of a CO (Central Office) trunk line subscriber who is a ring town trunk line subscriber or a general private subscriber to a tip / ring line; A ring signal detecting unit for detecting an incoming signal when a call is connected to a CO trunk line subscriber and detecting an occupation request of a calling subscriber when a call is connected to a subscriber connected to a ring down trunk line, A ring signal detector connected to the ring signal detector and connected to a subscriber connected to a ring-down trunk line, and terminating the call by informing the calling subscriber of termination of the call if the calling subscriber is hooked on and terminating the call; The power of the preset exchanger input from the transformer is inputted and the dial pulse loop A polarity detecting unit for detecting the polarity at a predetermined period and charging the mobile terminal connected to the tip line and the ring line according to the time used by the subscriber, and an occupancy and polarity detecting unit connected to the transformer, Line signal input from the switching center is input to the CO trunk line and the ring down trunk line combined device so that the corresponding two-line signal is converted into a four-wire signal. On the contrary, the signal is input from the CO trunk line and the ring- An impedance matching unit for matching a required impedance at the time of connection between the two-wire / four-wire conversion unit and the circuit for converting the four-wire type signal into a two-wire type signal to prevent the overcurrent from flowing, And analog data received from the ring line and the tip line is converted into a 2-line / 4-line conversion 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.

FIG. 1 is a block diagram suitable for explaining an apparatus for common use of a CO trunk line and a ring-down trunk line of a private branch exchange according to the present invention;

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

Description of the Related Art

110: ring sending part 120: ring signal detecting part upon incoming call

130: call state ring signal detector 140: occupancy and polarity detector

150: 2 line / 4 line conversion unit 160: Impedance matching unit

170: encoding and decoding unit 202: primary-

204: full-wave rectification section 206: voice signal removal section

208: Ring signal detector

These and other objects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

1, a ring transmission unit 110 for transmitting a ring signal to a telephone of a ring trunk line subscriber or a CO subscriber line subscriber, which is a general private subscriber, to a tip / ring line, A ring signal detecting unit 120 for detecting a ring signal and establishing an incoming call when a call is connected to a subscriber connected to a ring down trunk line and detecting an occupation request of the calling subscriber to make a call, When the calling subscriber is hooked-on to terminate the call when the subscriber connected to the ring-down trunk line is terminated, a call state ring signal detector (not shown) for terminating the call by notifying the calling subscriber of the call termination 130), a power source of an exchange input from a transformer, and a dial pulse loop And a polarity detecting unit 140 for detecting the polarity at regular intervals and charging the tip and ring according to the time used by the subscriber connected to the ring line. Line signal and the ring-down relay line, so that the corresponding two-wire signal is converted into a four-wire signal, and conversely, the four-wire signal input from the CO relay line and the ring- An impedance matching unit 160 for matching the impedances required for connection between the circuits and preventing the overcurrent from flowing, and a pulse code modulation unit 160 for receiving and decoding the pulse code modulation data output from the exchange, And receives the analog data received from the ring line and the tip line from the 2-wire / 4-wire conversion unit 150 and the impedance matching unit 160 By encoding a digital signal comprising: a CODEC (170) for outputting to the exchange.

Referring to FIG. 1, a detailed block diagram of a CO relay line and a ring-down relay line of a private branch exchange according to the present invention will be described in detail. The ring transmission unit 110 includes a ring- A ring signal arriving at the subscriber's CO trunk line subscriber's phone is sent to the tip / ring line, so that the impedance on the route is not affected by the call during the call.

The ring signal detecting unit 120 detects a ring signal when connected to a CO trunk line subscriber and detects an incoming call so that a call is connected to a subscriber connected to the ring down trunk line. do.

In the case of a ring-down trunk line, since the ring signal detecting circuit and the ring signal detecting circuit are separated from each other during a call, the ring signal can be transmitted during a call.

The call state ring signal detector 130 is independent of the CO trunk line subscriber and is connected to the subscriber connected to the ring down trunk line. If the originating subscriber hooks on and terminates the call, By notifying the end of the call, the call is terminated.

The occupancy and polarity detection unit 140 receives the power of the transformer, that is, the power of the exchanger input from the 2-wire / 4-wire converter 150 to form a dial pulse loop to use the power source of the exchange, So that billing can be performed according to the time spent by the subscriber connected to the tip line and the ring line.

The 2-wire / 4-wire converter 150 is a transformer that inputs 2-wire signals inputted from an exchange end to a CO trunk line and a ring-down trunk line to convert the 2-wire signals into 4-wire signals, , And the four-wire type signal input from the CO trunk line and ring down trunk line combined device is converted into a two-wire type signal.

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

Impedance matching is designed so that it can be changed according to the actual situation in each country. For example, the impedance at the impedance matching in Korea is 600 Ω .

The CODEC 170 receives and decodes the pulse code modulated data output from the exchange and receives the analog data received from the ring line and the tip line from the 2-wire / 4-wire conversion unit 150 and the impedance matching unit 160, And outputs it to the exchange.

Referring to FIG. 2, a detailed block diagram of the call state ring detector will be described with reference to FIG. 1. FIG.

The ring signal drawn through the tip line and the ring line to the first rectification section 202 passes through the first rectification section 202 composed of a bridge diode and is firstly rectified by voltage.

Is rectified through the primary rectification section 202 and is maintained at a constant DC voltage while passing through the full wave rectification section 204.

A signal through the full-wave rectification unit 204 is converted into a high pass filter so as not to pass a signal having a low voice level so that the signal through the full-wave rectification unit 204 is not detected by a voice signal during a voice call using the voice signal remover 206 use.

In the ring signal detecting unit 208, the ring signal detected by the primary detecting circuit is held at a predetermined time interval in the detection and holding circuit so that the ring signal can be read by the ring signal detecting unit.

The principles of the present invention have been described above with reference to specific apparatuses, which are illustrative only, and are not intended to limit the scope of the present invention as described in the appended claims.

As described above, according to the present invention, by adding the ring signal detecting function and the ring signal transmitting circuit of the ring town trunk line to the existing CO trunk line, it is possible to use both the subscriber and the ring trunk line belonging to the ring down trunk line It has the effect of accommodating all of its subscribers.

Claims (1)

A ring transmission unit 110 for transmitting a ring signal to a telephone of a CO subscriber (Central Office) trunk line subscriber who is a ring town trunk line subscriber or a general private subscriber to a tip / ring line; When a call is connected to a subscriber connected to a ring down trunk line, a request for occupancy of a calling subscriber is sensed and a call is made. A ring signal detection unit (120) for detecting a ring signal at an incoming call; When the calling subscriber is hooked on and terminates the call when the subscriber connected to the ring signal detecting unit 120 is connected to the subscriber connected to the ring down trunk line, the calling subscriber informs the calling subscriber of the end of the call, A detection unit 130; A power source of the exchanger is inputted by using a power source of a predetermined exchange inputted from a transformer to form a dial pulse loop so that the power of the exchange can be used and the polarity is detected at regular intervals, And a polarity detecting unit 140 for detecting the polarity of the polarity of the polarity of the polarity of the polarity signal. The two-wire signal input from the switching center is input to the CO trunk line and the ring-down trunk line as a transformer, and the corresponding two-wire signal is converted into a four-wire signal by being connected to the occupancy and polarity detecting unit 140 Conversely, when the two-wire / four-wire conversion unit 150, which converts the four-wire signal input from the CO trunk line and the ring-down trunk line combined unit into a two-wire signal, An impedance matching portion 160 for preventing the impedance matching; Receives and decodes the pulse code modulated data output from the exchange, and analog data received from the ring line and the tip line is received from the two-wire / four-wire conversion unit 150 and the impedance matching unit 160 and is encoded into a digital signal And a CODEC (170) for outputting the CODEC (170) to the exchange.