KR20050028947A - Apparatus for providing service tone in private branch exchange - Google Patents

Abstract

An apparatus for providing a service tone used for a PBX(Private Branch eXchange) is provided to allow a user to change a type of an analog voice signal as a service tone. A processing and storing unit processes a plurality of pre-set analog voice signals and stores them. A selecting unit determines one of the plurality of pre-set analog voice signals and selects one of the determined analog voice signal and an analog voice signal of a PBX received from the outside. A converting unit converts non-determined remaining one of the selected analog voice signal and the stored pre-set analog voice signal into a PCM(Pulse Code Modulation) voice signal. A transmitting unit selects one PCM voice signal desired by an operator of a PBX among the converted PCM voice signals, and transmits it as a service tone of the PBX to an extension subscriber terminal of the PBX.

Description

Service tone provision device for private exchange {APPARATUS FOR PROVIDING SERVICE TONE IN PRIVATE BRANCH EXCHANGE}

The present invention relates to a private exchange, and more particularly, to an apparatus for selecting a desired analog voice signal among a plurality of analog voice signals and providing the same as a service tone of the private exchange.

A Private Branch Exchange installed in a specific building or area calls out to extension subscribers by distributing calls coming from extension subscriber terminals, such as analog phones and digital phones, to other extension subscriber terminals rather than through the telephone exchange. An exchange that provides services. Such a private exchange provides a variety of services to extension subscribers, such as calling identity delivery services, in addition to calling services by a call distribution function.

Call service provided to extension subscribers from a private exchange is performed by the following process. First, when the calling subscriber off hooks the telephone's handset, the private exchange transmits a dial tone to the calling subscriber informing the calling subscriber that he is ready to receive a digit signal of a dial pulse. Next, when the calling subscriber presses the number button on the telephone dial pad, the private exchange ends the transmission of the dial tone and analyzes the number information from the received digit signal. Finally, the private exchange calls the called party of the corresponding number information through the subscriber line or the trunk line, and when the called party picks up the handset of the telephone, a call is made between the calling party and the called party.

On the other hand, the service tone provided from the private exchange to the extension subscriber station includes a ring tone as described above, a ring-back tone informing the calling subscriber that the calling signal is being sent to the called subscriber, A busy tone for notifying the calling subscriber that the call is busy, a call waiting tone for notifying the calling and receiving subscriber that there is an incoming call by another subscriber during the call. .

Figure 1 shows a block diagram of a private exchange having a conventional service tone providing apparatus. Various service tones of the private exchange 10 are service tone providing apparatuses in the form of pulse code modulated voice signals (hereinafter, referred to as "PCM voice signals") at the initial installation of the private exchange 10 ( 5) in a ROM (Read Only Memory) (not shown). The service tone to be transmitted to the extension subscriber station is designated by the service tone control process of the main processor unit 3 among various service tones stored in the ROM in advance, and the service tone providing device 5 is under the control of the main processor unit 3. The service tone designated by the service tone control process is transmitted to the extension subscriber station 9 through the subscriber device unit 7.

However, the conventional service tone providing apparatus is limited in that it can provide only the service tone of the complex frequency type stored in the ROM.

Accordingly, the present invention has been made to solve the above-mentioned problems, and the analog voice signal directly received from the outside of the private exchange and the analog voice signal stored in the service tone providing apparatus are selected as the service tone of the private exchange according to the intended use. The purpose is to provide a device that can provide.

According to a feature of the present invention for achieving the above object, there is provided a service tone providing apparatus for a private exchange, comprising: processing and storage means for processing and storing a plurality of preset analog voice signals, and a plurality of preset analog voices stored Means for determining one of the signals and selecting either the determined analog voice signal and the incoming analog voice signal from outside of the private exchange, the remaining undetermined analog voice among the selected analog voice signal and the stored preset analog voice signal Means for converting the signal into a PCM (pulse code modulation) voice signal, and a PCM voice signal selected by the operator of the private exchange from among the converted PCM voice signals and transmitted to the subscriber station of the private exchange as a service tone of the private exchange. Including means for A service tone providing apparatus is provided.

Hereinafter, with reference to Figure 2 will be described in detail a preferred embodiment of the present invention.

FIG. 2 is a block diagram of the apparatus 100 for providing a service tone for a private exchange according to an embodiment of the present invention, and an example of the private exchange in the present specification may be Meridian 1 of Nortel Networks. have. The apparatus 100 for providing a service tone shown in FIG. 2 includes an external voice signal receiver 21, a channel selector & analog switch 23, a voice signal storage & playback unit 25, and an external / internal voice signal selector switch 27. ), Complex frequency generation & level control unit 29, complex frequency / voice signal selection switch 31, timing control unit 33, PCM multiplexer 35, level converting unit 37, button & lamp control unit 39 And a power supply unit 41 and a central control unit 43.

In detail, the external voice signal receiver 21 matches an impedance with an external voice signal providing apparatus 200 such as a cassette player, receives an analog voice signal directly input therefrom, and adjusts a signal level. After that, the signal is output to the external / internal voice signal selection switch 27. The analog voice signal directly input from the outside is another analog voice signal corresponding to an arbitrary channel provided from the voice signal storage & reproducing section 25 described later to the external / internal voice signal selection switch 27.

Meanwhile, as shown in the drawing, the channel selection & analog switching unit 23 includes three terminals 23a to 23c, and is first provided from another external audio signal providing device (not shown) through the recording input terminal 23a. The voice message of the incoming analog voice signal or the private exchange operator is directly recorded and transmitted to the voice signal storage and reproducing unit 25. The recording content output terminal 23b of the channel selection & analog switching unit 23 is provided to monitor the recording state of the analog audio signal being recorded. In addition, the monitor terminal 23c of the channel selector & analog switching unit 23 has an analog voice signal reproduced by the voice signal storage & playback unit 25 and the XCT (eXtra Conference & Tone) device 300 and the subscriber device unit ( (Not shown) to monitor whether it is being transmitted normally to a subscriber station (not shown) as a service tone.

The audio signal storage & reproducing section 25 stores, for example, an analog audio signal for 8 channels transmitted from the channel selection & analog switching section 23 under the control of the central control section 43, and the stored analog audio signal For example, the analog voice signal for the first channel is transmitted to the external / internal voice signal selection switch 27 and the analog voice signal for the second to eighth channels is transmitted to the PCM multiplexer 35. In an embodiment of the present invention, an operator who electrically cancels the analog voice signal corresponding to all or part of the stored eight channels and selects from the channel selection & analog switching unit 23 can store a new voice comment for the desired channel. A chip corder can be used as the voice signal storage & reproducing section 25.

The external / internal voice signal selection switch 27 selects and outputs any one of an external analog voice signal from the external voice signal receiver 21 and an analog voice signal from the voice signal storage & playback unit 25.

On the other hand, the service tone providing apparatus 100 according to an embodiment of the present invention is a complex frequency generation & level adjustment unit 29 and the complex frequency to provide a service tone of the private exchange used for special purposes, such as communication security in military units, etc. / Voice signal selection switch 31 is provided. The complex frequency generating & level adjusting unit 29 uses two sine wave oscillators (not shown) using a VCO (Voltage Controlled Oscillator) circuit to display two frequencies, e.g., 350, for a first channel, for example, a dial tone. Generates frequencies ㎐ and 440 kHz, adds two frequencies using an adder amplifier (not shown) to generate a complex frequency for use as a service tone, and generates the generated complex frequency at a predetermined level, for example, − Adjust to the output level of 15kHz and transmit to the composite frequency / voice signal selection switch 31.

The composite frequency / voice signal selection switch 31 is an analog signal for the first channel received through the composite frequency and the external / internal voice signal selection switch 27 for the first channel from the composite frequency generation & level adjuster 29. Any one of the voice signals is selected and transmitted to the PCM multiplexer 35. The complex frequency generated by the complex frequency generating & level adjusting unit 29 corresponds to the channel signal performed by the external voice signal receiving unit 21, the external / internal voice signal selecting switch 27, and the voice signal storing & reproducing unit 25. Is provided. As can be seen from the above, if the analog voice signal for the third channel is provided from the voice signal storage & playback section 25 to the external / internal voice signal selection switch 27 instead of the first channel, Analog voice signals for the first to second and fourth to eighth channels are provided to the voice signal storage & reproducing section 25, and the external / internal voice signal selection switch 27 from the external voice signal receiving section 21 is provided. And the analog voice signal and the complex frequency from the complex frequency generation & level adjuster 29 to the complex frequency / voice signal selection switch 31 will be determined to correspond to the third channel, respectively.

The timing controller 33 includes a time slot generator, a frame synchronization signal generator, and an interleaved time slot generator, and is used in a private exchange using a clock and a master frame synchronization signal of the private exchange itself. Generate a time slot, a frame sync signal, and an interleave time slot, respectively.

The PCM multiplexer 35 includes a PCM codec (COde, DECode) (not shown), and uses a PCM codec to select, for example, a complex frequency or audio signal selected by the complex frequency / audio signal selection switch 31. The 8-bit interleaved method converts the PCM signal, selects a channel, and transmits the digitized PCM audio signal to the level converter 37 according to the time slot from the timing controller 33. The transmission of the PCM voice signal for the corresponding channel from the PCM multiplexer 35 to the level converter 37 is performed in response to the control signal from the XCT apparatus 300. The control signal is generated by a main processor section (not shown) included in the private exchange. In addition, the PCM multiplexer 35 converts the PCM voice signal for the selected channel provided to the level converter 37 into an analog voice signal and transmits the analog voice signal to the channel selector & analog switch 23. By doing so, the operator of the private exchange can monitor whether the PCM voice signal is normally transmitted to the extension subscriber station through the level converter 37 through the monitor terminal 23c of the channel selection & analog switching unit 23. .

The level converting unit 37 converts the PCM voice signal received from the PCM multiplexing unit 35 to the XCT apparatus 300 by converting the RS signal to the XCT apparatus 300 for the interface with the XCT apparatus 300, and from the XCT apparatus 300 to the RS422. The control signal of the scheme is received, converted into a control signal of the TTL level, and transmitted to the PCM multiplexer 35. The XCT apparatus 300 provides a PCM voice signal for the corresponding channel from the level converter 37 to the subscriber terminal through the subscriber device unit, and provides a channel selection control signal provided from the main processor unit to the level converter 37. It performs the function of delivering to the PCM multiplexer 35 through. In addition, the XCT apparatus 300 stores a basic voice signal corresponding to the service tone, and may provide one of the service tones to the subscriber station if necessary.

The button & lamp control unit 39 controls operations of buttons (not shown) and lamps (not shown) included in the service tone providing device 100, and the power supply unit 41 controls the service tone providing device 100. Supply the power necessary for the central control unit 43 controls the operation of all the elements (element) described above.

In the following, the service tone delivery process in the service tone providing apparatus 100 shown in FIG. 2 is divided into two classifications and described.

That is, the operation of the service tone providing apparatus 100 according to the embodiment of the present invention is analog voice signal and service tone providing apparatus 100 which is directly input from the outside of the private exchange by the external / internal voice signal selection switch 27. The process of selecting any one of a plurality of analog voice signals stored in the voice signal storage & reproducing unit 25 and transmitting the same to the PCM multiplexer 35 to provide a service tone will be described. For convenience of explanation, a description of the process of converting a complex frequency or analog voice signal into a PCM voice signal in the PCM multiplexer 35 and transmitting it to the subscriber station as a service tone has been described above in detail, and thus will be omitted here. As described above, the analog voice signals provided from the external voice signal receiver 21 and the voice signal storage & reproducing unit 25 to the external / internal voice signal selection switch are the signals for the first channel, and the voice signal storage & The analog audio signal provided from the playback unit 25 to the PCM multiplexer 35 is assumed to be a signal for the second to eighth channels.

1) When selecting an analog audio signal which is directly input from the outside of the private exchange by the external / internal voice signal selection switch 27.

The external / internal voice signal selection switch 27 is switched to the external voice signal receiving unit 21 of the private exchange, and the analog voice signal directly input from the external voice signal providing apparatus 200 as a signal corresponding to channel 1 is a complex frequency. / Voice signal selection switch (31). The complex frequency / voice signal selection switch 31 transmits the analog voice signal received through the external / internal voice signal selection switch 27 to the PCM multiplexer 35. If the composite frequency / voice signal selection switch 31 is switched by the operator to the composite frequency generation & level adjustment section 29, the composite frequency / voice signal selection switch 31 is the external / internal voice signal selection switch 27. The complex frequency generated by the complex frequency generation & level adjusting unit 29 is transmitted to the PCM multiplexer 35 instead of the analog voice signal.

2) When one of the eight analog voice signals stored in advance in the service tone providing device, that is, the voice signal storage & playback unit 25, is selected by the external / internal voice signal selection switch 27.

The external / internal voice signal selection switch 27 is switched to the voice signal storage and playback section 25, and any one of eight analog voice signals stored in the voice signal storage and playback section 25 corresponds to channel 1. As a result, the signal is transmitted to the composite frequency / audio signal selection switch 31. The complex frequency / voice signal selection switch 31 transmits the analog voice signal received through the external / internal voice signal selection switch 27 to the PCM multiplexer 35. If the composite frequency / audio signal selection switch 31 is switched by the operator to the composite frequency generation & level adjustment unit 29, the composite frequency / audio signal selection switch 31 is used at the complex frequency generation & level adjustment unit 29. The generated complex frequency is transmitted to the PCM multiplexer 35.

Although not described in the above cases 1) and 2), in each case, the seven analog voice signals reproduced in order to replace any seven service tones by the voice signal storage & reproducing section 25 are channel 2. The signal corresponding to ˜8 is transmitted to the PCM multiplexer 35.

Meanwhile, the lamp of the service tone providing device 100 blinks green while the analog voice signal converted to the PCM voice signal is transmitted as the service tone to the extension subscriber station, and the transmission state of the service tone is selected by the channel selection & analog switching unit ( 23 can be monitored by connecting an earphone or the like to the monitor terminal 23c.

In addition, the operator is provided in the service tone providing apparatus 100 to store a new analog voice signal in the voice signal storage & playback unit 25 instead of the analog voice signal stored in the voice signal storage & playback unit 25 described above. When the record button is pressed, the channel selector & analog switching unit 23 records a new analog voice signal or a voice comment of an operator that is input from another external voice signal providing device through the recording input terminal 23a. The recording state of the new analog audio signal or the operator's voice comment being recorded can be monitored by connecting an earphone or the like to the recording content output terminal 23b and listening. At this time, the channel selection & analog switching unit 23 records an analog audio signal corresponding to each channel and selects a channel for monitoring the recording state. The voice signal storing and reproducing section 25 erases an analog voice signal already stored under the control of the central control unit 43 or stores a new analog voice signal or a voice comment of an operator. In particular, the service tone providing apparatus 100 may include an analog voice signal corresponding to channel 1, that is, an analog voice signal directly input from the external voice signal providing apparatus 200, and an analog voice reproduced from the voice signal storing and reproducing unit 25. A device for providing another external voice signal such as a cassette player and the like through a recording input terminal 23a while transmitting any one of a signal and a complex frequency generated by the complex frequency generating & level adjusting unit 29 to the station subscriber terminal. Record new analog voice announcements, melodies, and more from your computer in real time.

The present invention selects any one of an analog voice signal coming directly from outside the private exchange, an analog voice signal stored inside the service tone providing device, and a complex frequency generated by the service tone providing device itself, and transmits it to the subscriber station as a service tone. At the same time, since a new analog audio signal incoming from the outside of the private exchange can be recorded in real time, the type of analog audio signal for providing as a service tone can be changed.

In addition, the present invention can be applied to a private exchange used for a special purpose such as communication security in military units, since the service tone providing device itself can selectively generate and use a complex frequency.

It is to be understood that the above described embodiments are merely illustrative of some of the various embodiments employing the principles of the present invention. It will be apparent to those skilled in the art that various modifications may be made without departing from the spirit of the invention.

1 is a block diagram of a private exchange having a conventional service tone providing apparatus.

2 is a block diagram illustrating a service tone providing apparatus for a private exchange according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

21: external voice signal receiver

23: channel selection & analog switching unit

25: Voice signal storage & playback unit

27: external / internal voice signal selection switch

29: complex frequency generation & level control unit

31: composite frequency / audio signal selection switch

Claims (5)

A service tone providing device for a private exchange, Processing and storage means for processing and storing a plurality of preset analog voice signals, Means for determining one of the stored plurality of preset analog voice signals and for selecting one of the determined analog voice signal and an analog voice signal coming from outside of the private exchange, Means for converting the remaining undetermined analog voice signal of the selected analog voice signal and the stored preset analog voice signal into a pulse code modulation (PCM) voice signal, and Means for selecting one PCM voice signal desired by an operator of the private exchange from the converted PCM voice signal and transmitting it as a service tone of the private exchange to the extension subscriber station of the private exchange. Service tone providing device comprising a. The method of claim 1 wherein the processing and storage means, Means for receiving and recording the preset plurality of analog voice signals, Means for monitoring the recording state of the predetermined plurality of analog audio signals being recorded by the recording means, and Means for monitoring the transmission status of the selected PCM voice signal as said service tone Service tone providing device comprising a. The method of claim 2, And the processing and storage means further comprises means for recording and storing in real time a new analog voice signal or a voice message of an operator of the private exchange while the service tone is transmitted to the extension subscriber station. The method of claim 1, And means for generating a complex frequency corresponding to an analog voice signal coming from outside of the private exchange, wherein the complex frequency is provided by adding a predetermined first and second frequency. The method of claim 4, wherein A first selection switch for selecting any one of an analog voice signal and an determined analog voice signal coming from outside of the private exchange, and And a second selection switch for selecting any one of the analog voice signal and the complex frequency selected by the first selection switch, And the PCM voice signal converting means converts the signal selected by the second selection switch and the undetermined remaining analog voice signal into a PCM voice signal.