KR920011072B1 - Special service method in p.a.b.x. - Google Patents

Abstract

The method provides various services of a private phone switchboard to the subscribers of the station line who have their own passwords. It includes a CPU (10) for loading service time from a service time area (a) by accessing a RAM (30) when an inputted call is DISA (Direct Inward System Access) station line, confirming the password inputted by a station line subscriber, and controlling the switchboard system to offer various services when the password is correct, otherwise to offer normal services to the subscribers of the station line.

Description

Function service method of private exchange to CO subscriber

1 is a system diagram of a private exchange for carrying out the invention.

2 is a flow chart in accordance with the present invention.

3 is a memory map diagram according to the present invention.

* Explanation of symbols for main parts of the drawings

10: central processing unit (CPU) 20: ROM

30: RAM 40: internal subscriber circuit

50: switching circuit 60: ring circuit

70: charging device (billing tape device)

80: trunk line circuit 90: tone source circuit

100: national exchange

The present invention relates to a method of providing a service to a CO line subscriber in a private exchange, and more particularly, to a function service method of a private exchange for a CO line subscriber which serves a function of a private exchange device to a CO line subscriber.

In general, private exchanges provide subscribers with several types of convenient functions.

However, since the functions of the private exchange are limited to the subscribers, when the private exchange is called from the place where the private exchange is not installed, the functions of the private exchange may not be provided at all. And this is often inconvenient.

Therefore, an object of the present invention is to provide a method that can provide a more convenient to the external subscriber by providing a variety of functions that the private subscriber has a private exchange.

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

1 is a system diagram of a private exchange for carrying out the present invention, which is a known circuit. The operation of FIG. 1 is briefly described. When the CO line subscriber calls from outside, the signal is incoming through the CO switch circuit 80 through the local exchange 100. At this time, the central processing unit (hereinafter referred to as “CPU”) 10 is operated by an operating system (OS) in the ROM 20 to control the switching circuit 50 and then undergoes various operations for connecting the trunk line subscribers. Afterwards, the CO subscriber is connected to the subscriber.

2 is a flow chart according to the present invention, a first process of checking whether a CO line subscriber is Direct Inward System Access (DISA) access, and a direct inward system access (hereinafter referred to as "first process"). The second process of setting the password timer after outputting the password PCM voice signal and checking whether the password is input after performing the second process. And a fourth step of checking whether the password timer set in the second step has timed out when the password is not input in the third step, and returning to the third step if it is not timed out. When the password is input in step 3, it is checked whether all the passwords have been entered. And a fifth step of checking whether the password is a valid password in step 5, and setting a dial timer after sending out a valid password temporarily and dial tone in the fifth step; and if the password decoded in the sixth step is not a valid password, A second step of checking whether it is the second time and requesting a password to re-enter it if it is not the second, and returning to the third step and ending the second step, and the eighth step of checking whether the dial number is input after performing the seventh step. And if the dial number is not input in the eighth step, checking whether the dial timer set in the sixth step has timed out, and returning to the eighth step if it has not timed out; and the eighth step Check if all numbers are entered when dial number is input, and if all are input, interpret the data and convert to system signal. A tenth step of providing a corresponding service, and a tenth step of providing a normal trunk line service when the dial time has elapsed in the ninth step, the timeout in the fourth step, or the DISA trunk line is not performed in the first step. It consists of a process.

3 is a memory map diagram according to the present invention, where a is a trunk number area, b is a subscriber class area, and c is a password number area. In addition, d is a service time domain, e is various bit fields required for service, and t is a timer domain. And the module consisting of a-e is composed of n pieces per trunk line.

Therefore, an embodiment of the present invention will be described in detail based on the above-described configuration.

The present invention is a method for providing various service functions that can be provided in the private exchange after providing a four-digit unique password when the trunk line subscriber is en masse in the private exchange in the same way as the general extension subscriber. The specific flow is shown in FIG.

When the CO subscriber joins the private exchange in step 201, the CPU 10 checks whether it is a DISA trunk line in step 202. At this time, the CPU 10 loads the service time in the service time zone a by accessing the RAM 30 having the memory map as shown in FIG. In step 204, it is checked whether the service time loaded above is reached.

If the service time is reached in the step 204 of checking the service time, the CPU 10 controls the tone source circuit 90 and the switching circuit 50 to transmit a predetermined password request signal for requesting a password to the trunk subscriber. At the same time, a password input timer for allocating and using a predetermined area t of the RAM 30 is set. At this time, the password signal is a PCM voice signal or a predetermined signal signal, and when the CO line subscriber receives the pass request signal and inputs a predetermined password, the CPU 10 performs steps 206, 207, and 208. If all of the passwords are input before the timeout timer is timed out, and all of the passwords are input, in step 209, the inputted password is decoded. However, if the CO line subscriber does not input all the passwords within the time set in the timer, the process proceeds to step 218 to perform normal service.

In step 210, the decoded password is a valid password, and the CPU 10 checks whether the decoded password is a valid password by accessing the password number area c of the RAM 30 and comparing it with the decoded password. If the result of the comparison in step 210 is not a valid password, the CPU 10 checks whether it is the second time in step 211, and if it is not the second time, outputs a password re-request signal in step 212, and then proceeds to step 206. Returning to receive the password again, when the second pass miss input recognizes that the CO line subscriber does not know the password and ends the flow.

When the valid password is input in step 210, the CPU 10 transmits a dial tone requesting the dial-in subscriber to dial in step 213, and then a predetermined area t of the RAM 30. After setting the dial timer to assign and use, in step 213 it is checked whether the dial number is input. After the CO line subscriber completes the dialing before the timer times out, the CPU 10 interprets the dial number input in step 217 and performs the service function of the corresponding private exchange.

However, if the CO line subscriber fails to dial all the time until the dial timer times out, the subscriber receives normal service.

As described above, since the present invention provides various kinds of functions of the private exchange of DISA trunk lines to the CO line subscriber, the CO line subscriber can also receive various service functions of the private exchange.

Claims (1)

A service method for a CO line subscriber of a private exchange, comprising: a first process of checking whether a direct inward system access is CO line when the CO line subscriber comes in; and loading the direct inward system access CO line temporary service time in the first process A second process of setting a password timer after outputting a password request signal if the service time is checked, a third process of checking whether a password is input after performing the second process, and a password is not input in the third process If not, check whether the password timer set in the second process has timed out. If not, the fourth process returns to the third process, and if the password is input in the third process, all the passwords are input. A fifth process of decoding the password if all have been input; A sixth step of setting a dial timer after sending out a valid password temporary dial tone by checking whether a password decoded by a valid password is valid, and checking whether it is the second when the password decoded in the sixth process is not a valid password. Or after the password outputs the re-request signal, returns to the third process, and if the second time, terminates, the eighth process of checking whether a dial number is input after performing the seventh process, and the eighth process. If the dial number is not input, check whether the dial timer set in step 6 has timed out, and if it is not timed out, the ninth step of returning to the eighth step and when the dial number is input in the eighth step If all the inputs are checked and inputted, the data are interpreted and converted into system signals. A tenth step of providing a service; and an eleventh step of providing a normal trunk line service when a dial time has elapsed in the ninth step, a timeout in the fourth step, or a direct inward system access trunk line in the first step; Functional service method of a private exchange for CO subscribers, characterized in that consisting of.

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