KR19990058076A - A method of adjusting the allocation time of MFPs in a simple exchange system - Google Patents

Abstract

The present invention relates to an exchange system, and more particularly, to a method for arbitrarily adjusting a time point at which MFR is allocated in a simple exchange system for each CO line. In the case of using an automatic transponder or a dedicated line such as E & M (Ear & Mouse) or DID (Direct Inward Dialing) or a direct inward station access (DISA) trunk line in a conventional private switch or a key telephone system, In order to solve the problem of o-dial and switching errors occurring due to the reception of a beep sound from the other exchange at a specific digit, the present invention provides a simple switching system in which the time for assigning MFR to the station- The present invention provides a method of adjusting an MFR allocation time point by allowing a caller to precisely switch a call to a desired extension by recognizing only necessary information such as an extension number of a subscriber by ignoring a pre-call signal such as a beep sound. According to another aspect of the present invention, there is provided a method for adjusting MFP al allocation time of a simple switching system, the method comprising the steps of: And a digit is input.

Description

A method of adjusting the allocation time of MFPs in a simple exchange system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exchange system, and more particularly, to a method for arbitrarily adjusting a time point of assigning an MFR (Multi-Frequency Receiver) in a simple exchange system.

If you use an automatic transponder or a DID, E & M, or DISA trunk line in a private switchboard or a key phone system, the system will assign an MFR to receive an incoming call from the outside, A specific function number and the like are recognized.

However, in the case of some national exchanges, when the called party receives a call, the national exchange exchanges a short beep tone and then forms a call. In the case of a private exchanger or a key telephone system, an MFR is assigned immediately upon receipt of a call so that the caller can recognize the number pressed by the caller in accordance with the situation. However, when the beep sound comes in, the terminating switching center recognizes the signal as a specific digit and switches to the wrong extension or performs an undesired function. For example, assume that the called party dials the desired extension '201' as soon as the called party receives the call. However, when the beep sound comes in between 2 and 0, the called side system mistakenly recognizes the beep as 'X', recognizes the beep sound as '2X01' other than '201' dialed from the calling side and switches to the wrong extension Can be handled with a number that is not at all

As described above, when using an automatic relay station or a leased line or a DISA trunk line in a conventional private branch exchange or a key telephone system, when receiving an incoming call from the outside, a beep sound coming from the opposite exchange is erroneously recognized as a specific digit There was a problem.

Therefore, it is an object of the present invention to provide a switching system in which an MFR assignment time point can be assigned and adjusted differently for each CO line for a station-preferred incoming call so that only necessary information such as an extension number is ignored, And an MFR allocation time adjustment method that allows a caller to correctly switch a call to an extension line desired by the caller.

According to another aspect of the present invention, there is provided a method of adjusting MFP al allocation time of a simple switching system, the method comprising the steps of: when an acknowledgment tone is received from a receiver- And a digit is input.

1 is a block diagram of a simplified switching system according to the present invention;

2 is a diagram showing the MFR allocation time according to confirmation sound upon reception of a trunk line according to call formation

3 is a flowchart illustrating a control flow for adjusting the allocation time point of MFR in the switching system according to the embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in detail with reference to the accompanying drawings. Many specific details, such as specific processing flows, are set forth in the following description to provide a more thorough understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Further, the detailed description of known functions and configurations that may be unnecessarily obscured by the gist of the present invention will be omitted.

1 is a block diagram of a simplified switching system according to the present invention,

The controller 111 controls the overall operation of the key telephone system to control the call switching and provide various services to the user. The ROM 112 stores programs and initial service data of the controller 111 for performing basic calls and various functions. The RAM 113 temporarily stores data generated during program execution under the control of the controller 111. [ In the present invention, a space for storing the MFR delay time and a program for specifying the space are installed in advance in a database (hereinafter referred to as DB) allocated to each line.

The switching circuit 114 switches various tones and voice data under the control of the control unit 111. [ The subscriber circuit 115 supplies a call current to an extension subscriber (not shown) under the control of the controller 111 and also interfalls signals between the extension subscriber and the switching circuit 114. The extension refers to a line connecting the switching system and the subscriber telephone. The ring generator 116 generates a ring signal and supplies it to the subscriber line. The trunk line circuit 117 seizes the trunk line under the control of the control unit 111 to form a trunk line communication loop and interfaces signals between the trunk line and the switching circuit 114. Here, the CO line refers to a line connecting the CO line circuit 117 and the public switching center.

The tone generator 118 generates various tone signals under the control of the controller 111 and outputs the generated tone signals to the switching circuit 114. The DTMF receiver 119 analyzes the DTMF signal input from the switching circuit 114, converts the DTMF signal into digital data, and outputs the digital data to the controller 111. The DTMF signal input to the DTMF receiver 119 through the switching circuit 114 is a telephone number generated by the trunk line subscriber or a telephone number generated by an extension subscriber. The DTMF transmitter 120 converts the digital data output from the controller 111 into a DTMF signal and outputs the DTMF signal to the switching circuit 114. Here, the DTMF signal output from the DTMF transmitter 120 is the telephone number of the trunk line subscriber generated when the trunk line side is called in the extension side.

In order to implement the function according to the present invention in the switching system having the above-described configuration, there is a space for storing a new MFR delay time in the DB and a MMC (Man Machine Communication) for specifying the space. The user can arbitrarily adjust the MFR delay time for each station to be allocated to the DB by using the MMC.

Generally, there is no single MFR for each trunk line, and it has a certain number of the system as a whole, and is allocated as needed. The MFR receives digits dialed from an extension, stores them in a memory, and dials them to the outside. The caller may press a specific extension number after receiving an incoming call not only from the extension but also from the outside. For example, if you receive a call from an auto attendant, you will first be directed to the caller. The caller who hears the announcement message will press the extension number or the relay call ID that he wants. The MFR is needed to know the number pressed. However, in some exchanges, when a call is established, a short beep sound is heard first. If this acknowledgment is recognized as one digit, the caller may flow to the wrong side that the caller does not want. This is also the case for dedicated lines such as E & M or DID. Once the call is received, the desired extension should be selected. If this confirmation is recognized as a single digit, the result may be completely different from what the caller would like.

To this end, the present invention can arbitrarily adjust the MFR allocation time point for ignoring the beep sound, which is the confirmation sound, for each CO line. That is, if the confirmation tone comes in at 1 second after the call is formed, if the MFR is allocated after 1 second, the digits received before the allocation are ignored. Likewise, even if the confirmation sound can be recognized as a digit, it is ignored because the MFR is not allocated. 2, the actual sender must input the digits after 2 seconds since the MFR is allocated.

In addition, there are cases where a trunk line coming from several exchanges is connected to one switching system. The state of each trunk line is different if there is a trunk connected to the public switching center A, the public switching center B, and the PABX respectively. For example, if a confirmation tone is received after 1 second, and the public exchanges B and PABX do not have a confirmation tone, only the CO line connected to the public switching center A may be selected and the MFR delay may be given for 1 second or more. In the case of a trunk line connected to a trunk line, the trunk line can be allocated at the same time as the call is formed. The MFR delay time for each station can be assigned as shown in Table 1 below.

MFR delay time by station National line MFR delay time Station 1 3 SEC Station 2 3 SEC International Line 3 3 SEC Route 4 5 SEC International Line 5 5 SEC Route 6 0 SEC Route 7 0 SEC ... ...

In the MFR allocation method, when all the COs have one MFR or if the system has a certain number of MFRs, the MFR is allocated and used when necessary, and after the use, the idle state . In both cases, once the MFR is allocated to the trunk line, it is not necessary to allocate the MFR only when making the call. This is because there is no digit information to be received from the caller side. For example, a Samsung DCS switching system can have up to 20 MFRs in the system as a whole. This means that 20 people can dial in at the same time. This is because the MFR must be assigned so that the subscriber can recognize the number pressed. At the end of the dialing, the assigned MFR is released, leaving it available for use by other subscribers. This is also necessary in the case of the above-mentioned incoming call. That is, when the automatic relay station responds, the external caller dials the extension number that he wants to call. At this time, MFR must be assigned to analyze the input number and convert it to the corresponding extension. In the case of E & M, DID, and DISA, the caller also enters an extension number or other trunk number after an incoming call. However, if the caller sends a special signal at the exchange side in addition to the dial number, the key telephone system recognizes it as a signal sent from the other party and recognizes it as a specific digit (0 to 9, *, #) It may happen that the processing is performed together. That eventually leads to erroneous data processing. In order to prevent this, the MFR is not allocated and ignored at the time when the confirmation tone is received, and then the MFR is allocated so that the caller receives only the digits inputted. A method for adjusting the MFR allocation time point for each trunk line according to the present invention will be described in detail with reference to FIG.

3 is a control flowchart for adjusting an allocation time point of an MFR in an exchange system according to an embodiment of the present invention,

First, in step 201, the control unit 111 responds to the incoming call through the trunk line circuit 117, and then proceeds to step 202. In step 202, In step 202, the controller 111 operates a CALL DURATION timer (not shown) to count the time. Then, in step 203, the controller 111 retrieves the MFR delay time from the corresponding DB of the incoming CO line. The MFR delay time is retrieved from the DB for the MFR delay time of each country, which is shown in Table 1, for example. If the MFR delay time is 0 (ZERO) SEC, the control unit 111 searches for an unused MFR in step 205 and proceeds to step 205. If the MFR delay time is 0 (ZERO) If the MFR delay time is not 0 (ZERO) SEC, it is checked whether the counting time of the CALL DURATION TIMER in operation is the MFR delay time of the incoming CO line in the MFR delay time DB. If it is determined that the counting time of the CALL DURATION TIMER has not yet reached the MFR delay time of the receiving CO line in the MFR delay time DB, the counting time of the CALL DURATION TIMER is still When the MFR delay time of the incoming CO line in the MFR delay time DB is reached, In step 207, the control unit 111 finds an unused MFR and allocates the unused MFR to the called CO line, and terminates the MFR allocation time adjustment program according to the present invention.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

As described above, the present invention prevents the confirmation sound from being recognized as a specific digit when it is connected to an exchange providing a special confirmation sound when a call is made, and by receiving and processing the number dialed by the actual caller, There is an effect that can be done.

Claims (3)

A method for adjusting an MFP allocation time of a simple switching system, Wherein when the confirmation tone is received from the receiver side exchange after the call connection due to the reception of the trunk line is received, the MFP number is allocated and the digit is input after the confirmation tone is received. A method for adjusting an MFP allocation time of a simple switching system having a database to which an MFP delay time is allocated and an MME specifying the MFP delay time, Allocating an EMF delay time to the database after allocating MFPs after a confirmation tone sent when a CO line is received for each CO line; Counting a time by operating a call-duration timer when a call is made according to an incoming call, Searching for an MFP delay time of a called CO line in the database after the call duration timer operation; Comparing a counting time of the call-duration timer with an MFP delay time of the called CO line; And searching for an unused MEP after the counting time of the call duration timer reaches the MEP delay time of the called CO line to allocate to the called CO line. 3. The method of claim 2, Wherein the MFP delay time allocated to the database is arbitrarily adjustable by the user using the MMS seed.