KR100732087B1 - Method for adjusting call sensitivity corresponding to distance of in keyphone system - Google Patents

Abstract

The present invention relates to a method for adjusting call sensitivity by distance of a key phone system, and provides a method for adjusting call sensitivity by distance of a key phone system that can adjust a gain of a call by compensating for loss of a call line according to a distance between an exchange station and an extension. do. The present invention for this purpose comprises a distance determination step of determining the distance of the trunk line section from the key phone system to the switching center; A gain searching step of searching for a gain adjustment value according to the determined distance from a preset coefficient table; And a gain adjustment step of adjusting a gain of a corresponding call according to the retrieved gain adjustment value. By the above configuration, the present invention can compensate for the loss of the call line according to the distance between the exchange station and the station, and adjust the call voice of the other party to an appropriate size. There is an effect that can provide a voice call.

Key phone system, call sensitivity, distance, gain, adjustment

Description

Method for adjusting call sensitivity corresponding to distance of in keyphone system}

1 is a block diagram showing a part of the configuration of the key phone system according to an embodiment of the present invention.

2 is a flowchart illustrating a setting method for adjusting call sensitivity by distance of a key phone system according to an exemplary embodiment of the present invention.

3 is a flowchart illustrating a method for adjusting call sensitivity by distance of a key phone system according to an exemplary embodiment of the present invention.

Figure 4 is a flow chart illustrating a method for adjusting the call sensitivity by distance of the key phone system according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: key phone system 110: LCO unit

120: central control unit 130: line card (SLIB unit)

132: line card (DLIB) 140: storage

150: extension (general telephone) 152: extension (digital telephone)

20: exchange office

The present invention relates to a method for adjusting call sensitivity by distance of a key phone system, and more particularly, to provide a good call quality for optimal call sensitivity according to distance between a key phone system and an extension and a trunk line. It relates to a call sensitivity adjustment method for each distance.

In general, a key phone system includes a line of central office (LCO) unit, which is a key phone analog trunk line unit, a central control unit that controls a call for connecting a station and a trunk line, a line card to which each station is connected, and an station connected to each line card. And a power supply unit for applying power to each unit, and a ring generator for applying a ring to each line.

In the keyphone system configured as described above, when a call is received from the CO line through the LCO unit, the central control unit switches to the corresponding station, and the call is connected to the corresponding station through the line card.

In addition, when a call is made from an internal station to a trunk line, the central control unit connects the call to an external trunk line through the LCO unit.

In the conventional key phone system, the other party's sound is very small due to the signal attenuation of the line depending on the distance from the switching center. In particular, the environment of the internal noise can not be heard more and more.

In this case, although there is a function of raising a sound through a program in the key phone system, the general user may not have program permission and may be unfamiliar with the program, causing difficulties.

In addition, when only the voice level was increased, the sidetones increased together, and the sound of "shushing" was mixed to clearly hear the other party's voice.

In addition, not only the installation distance from the exchange office, but also the installation distance of the extension station was not suitable for use because of poor call sensitivity.

Therefore, the conventional key phone system has a problem in that the voice level decreases according to the distance between the switching center and the extension station, the user feels uncomfortable due to the large amount of side sound when the volume is adjusted, and the voice of the other party is not well understood.

The present invention has been proposed to solve the above problems, it is possible to adjust the gain of the call by compensating for the loss of the call line according to the distance between the exchange and the extension to adjust the call voice and side tone of the other party to an appropriate size An object of the present invention is to provide a method for adjusting call sensitivity by distance of a key phone system.

The present invention for achieving the above object comprises a distance determination step of determining the distance of the trunk line section from the key phone system to the switching center; A gain searching step of searching for a gain adjustment value according to the determined distance from a preset coefficient table; And a gain adjustment step of adjusting a gain of a corresponding call according to the retrieved gain adjustment value.

Preferably, the coefficient table may calculate and store a characteristic coefficient value of a corresponding call path through simulation for each distance of a predetermined unit from the key phone system.

According to another aspect of the present invention, a method for adjusting call sensitivity by distance of a key phone system includes: a call initiation step of initiating a call with an outside at an extension of the key phone system; A status judging step of determining a call sensitivity state of a connected call; A distance checking step of checking a distance from the key phone system to the switching center and the extension; A gain selection step of selecting a gain adjustment value according to the identified distance; And a gain adjustment step of adjusting a gain in a corresponding currency according to the selected gain adjustment value.

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

1 is a block diagram showing some components of a key phone system according to an embodiment of the present invention.

The key phone system 10 is an LCO unit 110, which is an analog trunk line unit, a central control unit 120 for adjusting call sensitivity by distance, a line card 130 and 132 to which each extension is connected, and a call sensitivity for distance. And a storage unit 140 for storing the characteristic coefficient values of the communication path, the stations 150 and 152 connected to each line card, a power supply unit for supplying power to each unit, and a ring generator for applying a ring to each unit.

The LCO unit 110 connects signals from the exchange station 20 to the stations 150 and 152 and connects signals from the stations 150 and 152 to the switch station 20.

The central controller 120 extracts the characteristic coefficient values for the call paths by simulation for each unit distance of the station and the trunk line, and determines the distance to the exchange station.

A single line interface board (SLIB) unit 130, which is a type of line card, is connected to a single line telephone (SLT) such as a general telephone 150, a fax, an answering machine, and the like.

In addition, the digital terminal 142 is connected to the DTIB (Digital Terminal Interface Board) unit 132, which is a type of line card.

The storage unit 140 stores the optimized characteristic coefficient values (Sicofi) table simulated by a predetermined unit distance of 0 to 8 km for each station and the trunk line by the central controller 120.

The digital telephone extension 152 is a digital key telephone telephone dedicated to the key phone system 10 and can make calls with external lines and other extensions through the trunk line.

The general telephone extension 150 supports basic calls and the like, and the phone supporting the CID (Caller-ID) function may display information such as a user's telephone number and name.

The key phone system 10 according to the embodiment of the present invention configured as described above is the key phone system 10 or the private exchange system (PBX, PABX) in order to maintain an optimal call state according to the distance of each trunk line or the distance of each extension subscriber. By calculating and providing a table of characteristic coefficient values simulated in advance in a system such as the above, a user or an installer can easily program and use them in an actual use environment.

In addition, the key phone system 10 has a function of automatically compensating the volume of voice for each distance, and can be individually programmed for CO lines and extensions, and the range is collectively designated for the entire program. can do.

Meanwhile, distance simulations performed in advance may be applied differently according to the regulations of each country. For example, a characteristic coefficient value is calculated through simulation by applying a complex impedance of 600 ohms in Korea and a complex impedance in Europe. Can be used in your country.

Hereinafter, a method of storing call sensitivity by distance of a key phone system according to an exemplary embodiment of the present invention will be described with reference to FIGS. 2 to 4.

2 is a flowchart illustrating a setting method for adjusting call sensitivity by distance of a key phone system according to an exemplary embodiment of the present invention.

First, in step S201, a setting method for distance-sensitive call sensitivity adjustment of a keyphone system is performed by performing distance-by-distance simulation of an extension / trunk line.

That is, the simulation is performed in a manner of checking the call sensitivity while changing the characteristic coefficient value (Sicofi coefficient value) for each distance of the unit from the key phone system 10.

The simulation is performed by dividing the distance to the trunk line, that is, the distance to the switching center 20, or the station, by a certain unit, based on the key phone system 10. The same simulation can be performed.

In step S202, a gain adjustment value for each distance is calculated.

That is, through the simulation, a characteristic coefficient value for providing an optimal call sensitivity at the corresponding distance is calculated.

For example, a total of 16 characteristic coefficient values tables for 8 stations and trunk lines are calculated in units of 1 km in the range of 0 km to 7 km.

In step S203, the calculated distance-specific gain adjustment value table is stored.

The coefficient value table is stored in the storage unit 140. In this case, the central controller 120 sets a gain to increase the voice level by a predetermined level in the coefficient value table, that is, by 1 km.

In this manner, the setting method for distance-sensitive call sensitivity adjustment of the keyphone system is terminated.

3 is a flowchart illustrating a method for adjusting call sensitivity by distance of a key phone system according to an exemplary embodiment of the present invention.

First, in step S301, by determining the distance of the trunk line section from the keyphone system 10 to the switching center 20, a method for adjusting the call sensitivity per distance of the keyphone system is started.

That is, the keyphone system 10 transmits an appropriate signal to the switching center 20, and then measures the intensity of the response signal to calculate distance information.

In step S302, a gain adjustment value according to the determined corresponding distance is retrieved from a preset coefficient table.

That is, the key phone system 10 retrieves a gain adjustment value for adjusting the gain for the call sensitivity in response to the calculated distance to the switching center 20 from the characteristic coefficient value table stored in the storage 140 therein. .

In step S303, the gain of the corresponding call is adjusted according to the found gain adjustment value.

That is, when the central control unit 120 of the key phone system 10 records and stores the characteristic coefficient values stored in the storage unit 140 in the Sicofi unit of the LCO unit 110, the LCO unit 110 records the recorded characteristic coefficient values. Use to adjust the gain for that currency.

By such adjustment, the voice signal level to the corresponding call can be optimized by adjusting the gain by the designated level.

In step S304, the key phone system 10 determines whether to perform the gain adjustment for the extension, and if it is determined that the gain for the extension is not adjusted, the series of distance sensitivity adjustment for each distance is ended.

If it is determined in step S304 that the key phone system 10 performs gain adjustment for the extension, then the process proceeds to step S305 where the distance from the key phone system 10 to the extension is calculated in a manner similar to that in step S301. do.

In step S306, the gain adjustment value according to the determined corresponding distance is retrieved from the preset coefficient table.

That is, the keyphone system 10 stores, in the storage 140 therein, a gain adjustment value for adjusting the gain for the call sensitivity in response to the calculated distance to the general telephone extension 150, for example. Search in the property count table.

In step S307, the gain of the corresponding call is adjusted according to the found gain adjustment value.

That is, when the central control unit 120 of the key phone system 10 records and stores the characteristic coefficient values stored in the storage unit 140 in the line card, for example, the Sicofi unit of the SLIB unit 130, the SLIB unit ( 130 adjusts the gain for the corresponding channel using the recorded characteristic coefficient values similar to the gain adjustment for the trunk line.

In this manner, the method for adjusting call sensitivity by distance of the keyphone system is finished.

4 is a flowchart illustrating a method for adjusting call sensitivity by distance of a key phone system according to another exemplary embodiment of the present invention.

First, in step S401, a call sensitivity adjustment method for each distance of the key phone system is started by initiating a call with the outside at the extension of the key phone system.

For example, when a public telephone call is made through the key phone system 10 for a call with the outside in the general telephone extension 150, the key phone system 10 connects the call to the corresponding switching center 20 to connect the call path. do.

At this time, the key phone system 10 is designated as 0 km for both the trunk line and the station as a default value in the characteristic coefficient value table, and is initially set as a reference gain value accordingly. That is, the LCO unit 110 and the SLIB unit 130 record the default values of the coefficient value table.

In this state, the user of the general telephone extension 150 proceeds to the call using the outside line and the public line.

In step S402, the user determines the call sensitivity state of the connected call.

In other words, the user determines whether the call sensitivity during the current call is appropriate. If the user determines that the call sensitivity is appropriate, the process proceeds to step S407 to continuously perform a call.

On the other hand, for example, assuming that the key system 10 is installed about 5 km away from the switching center 20, at this time, the key phone system 10 is the user is set because the gain adjustment is set by the default value (0 km) The voice of the other party sounds very small and you will judge that the call sensitivity is bad.

In this way, when the user determines that the call sensitivity during the current call is not appropriate as a result of the determination in step S402, the process proceeds to step S403 to check the distance to the switching center 20 or the telephone extension 150.

Here, it is assumed that the distance from the key system 10 to the switching center 20 can be provided with information from the switching center 20, and the distance to the general telephone extension 150 can be easily determined by the user.

In step S404, the user selects a gain adjustment value according to the identified distance.

That is, the user selects a gain adjustment value for the corresponding call path using the general telephone extension 150.

More specifically, as in the home, since the key phone system 10 is 5 km away from the switching center 20, the user performs setting for adjusting gain by a level corresponding to the distance.

This setting can be selected by the program mode of the telephone extension 150, for example, [PGM + 200 (PGM number) + CO line number range (ex.05-05, 5th station only) + 5 Enter the program code (5Km, Default: 0) + Save] to select the gain adjustment value. That is, such a program code inputs a gain adjustment mode (PGM +200) selection, a gain adjustment trunk line number (05-05) selection, a distance 5 selection, and the like.

In step S405, the gain of the call is adjusted according to the selected gain adjustment value.

That is, according to the user's selection, the key phone system 10 compensates the loss corresponding to 5 Km to a certain level to increase the voice level, and adjusts to a condition that can maintain the optimal call sensitivity at 5 Km even for sidetones. do.

At this time, the central control unit 120 of the key phone system 10 retrieves the characteristic coefficient value of the corresponding distance from the storage unit 140, for example, writes by 1 byte in the Sicofi unit of the LCO unit 110, thereby making a call. In this case, gain adjustment can be performed without disconnection.

On the other hand, unlike the above assumption that only coordination of trunk lines is performed, for example, the key phone system 10 is installed at a position about 7 km away from the switching center 20 (which is a normal maximum distance in the country), and a general telephone apparatus. Assuming that the extension 150 is also installed about 3 km away (e.g., the wire is very long after round trip through the elevator), the keyphone system 10 is not only a distance from the switching center 20, but also a general Since the distance to the telephone extension 150 is also installed farther than the default (0 km), the user has a very bad call sensitivity, so that the other party's voice is almost inaudible and the sidetone is not optimized, so the user may not be able to hear it well. Most likely.

In this case, as described in step S304, using the program mode of the extension telephone extension 150, first, [PGM + 200 (PGM number) + trunk line number range (ex.01-20) being used for the trunk line. Enter all program lines) + 7 (7Km, Default: 0) + Save] and enter [PGM + 200 (PGM No.) + Extension Number Range (ex.001-005, same distance) Enter the same program code as the one of station extension 001 ~ 005) + 3 (3Km, Default: 0) + Save].

By this setting, the voice level is improved by compensating the loss corresponding to 7 km to the trunk line at a constant level, and the voice level is improved by compensating the loss corresponding to 3 km to the station at a constant level. Both the main line and the side line can reduce the side tones (reduced a lot of side tones to eliminate the hum) in the optimal call state.

At this time, the central control unit 120 may be simultaneously applied to the trunk line from 1 to 20 times, and to record each characteristic coefficient value at the same time so that the same to the 001 ~ 005 to the station.

On the other hand, except for a special case, the exchange station 20 is installed at about the same distance from the key phone system 10, but if the individual exchange station 20 is intermittently connected with other carriers, the deviation according to the trunk line used increases, and thus the installation distance is also increased accordingly. In this case, the user can selectively adjust the gain for each trunk line.

In step S406, it is determined whether or not the call sensitivity is appropriate. If the call sensitivity is not appropriate, the user proceeds to step S303 and repeats the additional adjustment. If it is determined that the call sensitivity is appropriate, the process proceeds to step S307. End after a call.

In this manner, the method for adjusting call sensitivity by distance of the keyphone system is finished.

As described above, the method for adjusting call sensitivity by distance of the keyphone system according to the present invention calculates the gain adjustment value through distance-by-distance simulation from the keyphone system to the switching center and the station, and stores the gain adjustment value as a characteristic coefficient value. By adjusting the gain for the call path, the loss of the call line according to the distance between the switching center and the station can be compensated to adjust the call voice of the other party to an appropriate size, and also by automatically adjusting the side tone that may occur at this time. It is effective to provide the most optimized voice call.

In addition, the present invention can select and adjust gains individually for not only trunk lines but also stations.

In addition, the present invention can optimally maintain the state of the line, it is possible to reduce the error rate when receiving data such as CID as well as voice call incidentally.

In addition, the present invention by performing the simulation according to the regulations of each country as well as domestic to store the gain adjustment value, there is a difference in the degree in each country, but can maintain the optimum currency sensitivity.

In addition, the present invention makes it possible to adjust the call sensitivity quickly and easily without hardware modifications, i.e. without modifying the resistors or capacitors, in order to adjust the gain to the call by performing the gain adjustment automatically by program code or automatically.

Claims (3)

delete delete A call initiation step of initiating a call with an outside at an extension of said key phone system; A status judging step of determining a call sensitivity state of a connected call; A distance checking step of checking a distance from the key phone system to the switching center and the length of the extension; A gain selection step of selecting a gain adjustment value according to the identified distance and length from a preset coefficient table; And a gain adjustment step of adjusting a gain of a corresponding call according to the selected gain adjustment value.

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