KR19990016774A - Trunk Line Tester and Method of Exchange System - Google Patents

Abstract

The present invention relates to an apparatus and a method for testing a CO line card of an exchange system, and to implement an apparatus and method for testing the normal operation of various CO lines without expensive equipment. The present invention connects a predetermined cable for the local exchange to the trunk line port of the exchange system, and inputs a predetermined extension subscriber's telephone number of the exchange system through the connected cable, thereby making a normal communication path between the trunk line port and the subscriber. The present invention proposes a method of testing the presence or absence of normal operation of the CO line.

Description

Trunk Line Tester and Method of Exchange System

The present invention relates to an apparatus and method for testing a trunk line card of an exchange system, and more particularly, to an apparatus and method for testing the normal operation of various trunk line ports without expensive equipment.

In general, a switching system such as a private automatic branch exchange (PABX) has a trunk line connection connected to a local exchange through a subscriber line interface and a central office line (co line) that accommodate a plurality of extension subscribers. (central office line interface). Accordingly, the exchange system enables calls between extension subscribers and extension subscribers and calls between extension subscribers and trunk subscribers.

On the other hand, the trunk line connection portion of the exchange system is provided with trunk line ports for connection with a general trunk line and a dedicated trunk line. Conventionally, it was tested by using a universal test equipment (UCS) manufactured for a special purpose to determine whether each trunk line port of such a trunk line connection card operates normally. However, since such test equipment is expensive, it is a huge burden on the economic side for the operator. In addition, since these test equipments are produced in parallel with the exchange system, the cost of production increases for the producer. In addition, in the case of testing a plurality of trunk lines port has a disadvantage that takes a long time to install and dismantle the test equipment.

Accordingly, an object of the present invention is to provide an apparatus and method for testing a trunk line port without using separate test equipment in an exchange system.

Another object of the present invention is to provide an apparatus and method for reducing the cost of testing a trunk line port in an exchange system.

It is another object of the present invention to provide an apparatus and method for reducing the burden on an operator in testing a trunk line port in an exchange system.

It is still another object of the present invention to provide an apparatus and method for more easily installing and testing a plurality of trunk line ports in an exchange system.

In order to achieve the above object, the present invention connects a predetermined cable for a local exchange to a trunk line port of an exchange system, and inputs a predetermined telephone subscriber side telephone number of the exchange system through the connected cable to connect between the trunk line port and the subscriber station. The present invention proposes a method for testing the normal operation of the CO line by determining whether the communication path is normally formed.

The trunk line port test apparatus of the exchange system according to the present invention includes a trunk line connection card having at least one trunk line port, a first subscriber connection card and a second subscriber connection card having a plurality of internal subscriber ports, and the trunk line connection. The cable connected between the predetermined trunk line port of the card and any of the extension subscriber ports of the first subscriber connection card, and the one extension of the second subscriber connection card via any of the extension subscriber ports of the first subscriber connection card. When the telephone number of the subscriber port is input through the cable, it attempts to form a call between the trunk line port and the subscriber subscriber port of the second subscriber access card, thereby determining whether the trunk line port is normal or not according to the attempt result. It is made of a currency forming means. The cable is a conductor, and is implemented as a single wire or stranded wire.

1 is a view showing an external connection configuration of the exchange system forming a trunk line test apparatus according to the present invention.

Figure 2 is a view showing the internal connection configuration of the exchange system forming a trunk line test apparatus according to the present invention.

3 is a cable connection diagram between the trunk line port of the trunk line card and the subscriber subscriber port of the station card shown in FIGS. 1 and 2;

4 is a view showing a processing flow of the trunk line port test operation according to the present invention.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or chip designer, and the definitions should be made based on the contents throughout the present specification.

1 is a view showing an external connection configuration of the PABX forming a trunk line port test apparatus according to the present invention, Figure 2 is a view showing an internal connection configuration of a PABX forming a trunk line port test apparatus.

1 and 2, the trunk line port test apparatus according to the present invention can be seen that the test equipment for testing the trunk line port is provided separately is not made in the form of being connected to the trunk line connection card 11,12. Instead of this type, one side of a predetermined cable 71 is connected to the trunk line port for the test of the trunk line connection card 11, and the other side of the cable 71 is connected to the subscriber access card 21. The cable is a conductor, and may be implemented as a single coated wire or a stranded wire. The connection of these cables to the trunk line port for testing is intended to replace these cables with the functions of the local exchange. The subscriber port of subscriber access card 24, 25 is connected to the inlet of call test equipment or telephone 60 through cable 72, 73, respectively. The subscriber access card 24, 25 indicates the called party extension subscriber who is called when the user presses the telephone number to test whether the trunk line port is operating normally. That is, when the user inputs the telephone number of the predetermined extension subscriber port of the subscriber access card 24 (or 25) on the subscriber access card 21 during the CO line port test, the inputted phone number is connected to the corresponding trunk line port of the trunk line access card through the cable 71. After the call is input, the call is received at the corresponding subscriber port of the subscriber access card 24 (or 25) by the control of the control unit 50 and the switching circuit 30.

Meanwhile, referring to FIGS. 1 and 2, call test equipment may be connected to extension subscriber ports of a called party subscriber access card 24 and a subscriber access card 25. The test equipment is conventionally used to test trunk lines. It is not an expensive equipment, but a device that performs only the same function as a telephone.

FIG. 3 is a diagram illustrating a cable connection between a trunk line port of a trunk line access card 11 and an extension subscriber port of a subscriber access card 21 shown in FIGS. 1 and 2.

4 is a view showing a processing flow of the trunk line port test operation according to the present invention. The program according to the processing flow is stored in the memory unit included in the controller 50, and the operation is controlled by the controller 50 to test whether the corresponding trunk line port operates normally.

First, in order to perform the trunk line port test operation according to the present invention as described with reference to FIGS. The operation of connecting the subscriber port via a predetermined cable should be preceded. In addition to the preceding operation above, the operation of connecting the subscriber port of the calling party subscriber access card 24, 25 to the call test equipment (or telephone) 60 through a predetermined cable should be preceded.

If the user presses the CO line selection number at the subscriber subscriber port of the subscriber access card 25 which is the calling party after such a cable connection operation (step 401), the controller 50 selects the CO line corresponding to the pressed CO line selection number. Occupies a tone using the tone generator 40 and transmits a dial tone to the subscriber subscriber port (step 402). When the user presses the telephone number of the extension subscriber port of the subscriber access card 24, which is the called party, in response to the transmitted dial tone (step 403), the pressed telephone number is transferred to the extension port of the extension access card 21 through the cable 71. Is approved. Then, the control unit 50 controls the switching circuit 30 in response to the authorized telephone number and attempts to form a call between the extension subscriber port of the subscriber access card 21 at the calling party and the subscriber subscriber port 24 of the subscriber access card 24 at the called party ( Step 404). When it is determined that the call path is formed by this attempt (step 405), the tester (call test equipment) determines that the corresponding CO line is operating normally (step 406). However, when it is determined that the call path is not formed by the determination operation, the tester (call test equipment) determines that the corresponding CO line is abnormal (step 407). Here, the operation of determining whether the trunk line port is operating normally or abnormal is possible by determining whether the extension subscriber of the subscriber access card 21, which is the called party, receives a call or not.

As described above, the present invention can implement a test apparatus by simply connecting a cable of a conductor without using an expensive trunk line test equipment separately. Accordingly, it is possible to reduce the cost of the equipment for the trunk line port test, and there is an advantage that it is possible to simply test all kinds of trunk line ports.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

Claims (5)

In the apparatus for testing the trunk line port of the switching system, A trunk line connection card having at least one trunk line port, A first subscriber access card and a second subscriber access card having a plurality of extension subscriber ports, A cable connected between a predetermined trunk line port of the trunk line connection card and an internal subscriber port of the first subscriber line connection card; Any one of the CO line and the second subscriber access card when the telephone number of any one subscriber port of the second subscriber access card via the extension port of the first subscriber access card is input through the cable. A test apparatus comprising a call path forming means for determining whether or not the CO line is normal according to a result of the attempt by forming a call between extension subscriber ports. The test apparatus according to claim 1, wherein the cable is a conductor and is implemented by single wire or stranded wire. In the method for testing the trunk line port of the switching system, A predetermined cable for the local exchange is connected to the trunk line port, and through the connected cable, a predetermined extension subscriber side telephone number of the exchange system is input to determine whether a communication path between the trunk line port and the extension subscriber is normally formed. Test method characterized in that the test of the CO line port normal operation. 4. The test method according to claim 3, wherein one side of the cable is connected to the trunk line port and the other side is connected to a predetermined extension port, and then the extension subscriber side telephone number is input through the port. The test method according to claim 3 or 4, wherein the cable is a conductor and is implemented by single wire or stranded wire.