KR100370772B1 - Apparatus and method for providing music-on-hold service in key telephone system - Google Patents

Abstract

The present invention relates to a key phone system, and when a corresponding extension required for incoming call is connected to an external MOH music source for a pending sound transmission service by using one of the trunk line ports provided in the trunk line circuit of the conventional key phone system. The incoming call is connected to the preset trunk line port to which the external MOH music source is connected, so that the reserved sound for the reserved sound transmission service from the external MOH music source is provided.

Description

Apparatus and method for sending out pending sound in key phone system {APPARATUS AND METHOD FOR PROVIDING MUSIC-ON-HOLD SERVICE IN KEY TELEPHONE SYSTEM}

The present invention relates to a music on hold (MOH) transmission service apparatus and method of a key phone system.

In general, the pending sound transmission service provided by the key phone system refers to a service for transmitting pre-recorded music and the like to the calling party through the pending sound transmitter provided in the key phone system when the call is switched to a designated extension or when all the extensions are busy. Calling subscribers can hear that the designated extension is busy when the designated extension is busy, and can hear that the designated extension is busy and become less bored while waiting for the call to end.

However, in the above-described conventional key phone system, in order to provide the reserved sound transmission service, a separate hardware such as a reserved sound transmitter must be provided, and a separate jack must be provided, which causes a cost increase and also increases the number of line bands. It has been the cause of the reduction.

To describe in more detail the problem with respect to the transmission of the pending sound of the conventional key phone system; In order to implement the caller identification function of the incoming call in the conventional key phone system, for example, the digital key phone system, a relay for caller ID is added to the general loop start trunk circuit between rings. In order to receive the FSK (Frequency Shift Keying) signal for the caller identification, the DC voltage (typically, -48V) is blocked and only the FSK signal of the caller identification information is sent to the system for analysis. To display information about the caller. The same circuit is configured to mount on one trunk card by determining the number of ports according to the capacity of the system. In addition, the music required by the system (switching incoming calls or sending music to the caller when the call is held) is configured on a separate card. There was a problem that needs to be added.

Accordingly, an object of the present invention is to provide an apparatus and method for performing a pending sound transmission service without having to provide additional hardware such as a pending sound transmitter in a key phone system in order to solve the conventional problems.

Another object of the present invention is to use the conventional caller identification trunk card used in the conventional key phone system, the conventional general loop start trunk and caller identification function, and if a music function needs a specific port on the MMC port The present invention provides a method of supplying an external music house by designating.

In order to achieve the above object, the present invention connects one trunk line port which is not in use among the trunk line ports provided in the trunk line circuit of the conventional key phone system with an external MOH music source for the call-to-hold service, or when the extension is requested. When the call is in progress, the incoming call is connected to the preset trunk line to which the external MOH music source is connected, so that the reserved sound for the reserved sound transmission service from the external MOH music source is provided.

In addition, the present invention provides a method for supplying an external music source in a key phone system that receives a music source by connecting a particular trunk line port of the trunk line port of the trunk card equipped with a caller identification relay, the music source port, A first process of always connecting the caller identification relay of the corresponding CO line to connect with the external music source equipment, and a second process of supplying a music source received through the CO line designated as the music source port to the system; When the music source using channel occurs after the second process, it is characterized in that the connection to the channel to supply the music source received from the external music source equipment to the corresponding channel.

1 is a block diagram of a key system equipped with an external MOH music source according to an embodiment of the present invention.

2 is a flowchart illustrating a process of setting a trunk line port connected to an external MOH music source according to an embodiment of the present invention.

3 is a flowchart illustrating a process of performing a pending sound transmission service in a key phone system according to an embodiment of the present invention.

4 is a block diagram of a digital key phone system according to another embodiment of the present invention.

5a, b, c are circuits for loop start trunk and caller identification in accordance with a preferred embodiment of the present invention.

6 is a control flowchart for designating a MOH music source supply port according to another embodiment of the present invention.

7 is a control flowchart for supplying the MOH music source according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Many specific details, such as specific process flows, are set forth in the following description to provide a more general understanding of the invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a block diagram of a key phone system according to an exemplary embodiment of the present invention. Referring to FIG. 1, the controller 108 controls call switching and general operations of the key phone system to provide various services to a user. The memory 110 is a ROM (Read Only Memory) for storing programs and initial service data for performing basic calls and various functions, and a RAM (Random Access Memory) for temporarily storing data generated during program execution. It is composed. The switching unit 102 switches various signals under the control of the control unit 108. The subscriber circuit 104 supplies a call current to a subscriber telephone (not shown) under the control of the controller 108 and interfaces a signal between the subscriber telephone and the switching unit 102. The ring generator 106 generates a ring signal and supplies it to the subscriber circuit 104. The trunk line circuit 112 forms a trunk line call loop under a control of the central office C.O under the control of the controller 108 to interface a signal between the trunk line and the switching unit 102. Here, the trunk line refers to a line connecting the trunk line circuit and a national exchanger (not shown). A dual tone multi frequency (DTMF) receiver 114 analyzes a DTMF signal input from the switching unit 102, converts the DTMF signal into digital data, and outputs the digital data to the controller 108. Here, the DTMF signal input from the switching unit 102 to the DTMF receiver 114 is a telephone number generated by the trunk line subscriber or a telephone number generated by the extension subscriber. The DTMF transmitter 116 converts digital data output from the control unit 108 into a DTMF signal and outputs the DTMF signal to the switching unit 102. Here, the DTMF signal output from the DTMF transmitter 116 becomes the telephone number of the trunk line subscriber generated when the trunk line is called from the station. The external MOH music house 118 is connected to an unused port of the trunk line circuit and transmits a call pending sound such as music pre-recorded for an extension or an incoming call.

2 is a flowchart illustrating a process of designating one port of a trunk line port as a port for transmitting a reserved sound from an external MOH music source according to an exemplary embodiment of the present invention. The operation according to the flowchart of FIG. 2 is programmed in the memory 110 to be performed by the controller 108 of FIG. 1. Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

First, if there is an input of a program mode key from a key phone system operator for setting an unused free trunk line port of a key phone system for the external MOH music source for a pending sound transmission service, the controller 108 responds to this. Proceeding from step 200 to step 202, the program mode is set. Accordingly, the operator can select and set conditions of various option functions of the key phone system in the program mode. At this time, the operator selects the holding sound transmission function for implementing the holding sound transmission service. In response, the control unit 108 proceeds from step 204 to step 206 to accept an input of a trunk line port number for performing the pending sound transmission service from the operator. Subsequently, the control unit 108 proceeds to step 208 and sets the port number input in step 206 to a port connected to the external MOH music house 118 for a pending sound transmission service, and in step 210. It is checked whether the setting completion key for completing the trunk line port setting for the pending sound transmission service is input. At this time, if the input of the setting completion key is not detected, the control unit 108 proceeds to step 206 again to receive the port number. Otherwise, if the input of the setting completion key is detected, the CO line to the external MOH music source 118 is detected. Exit the program to set the port.

3 is a flowchart illustrating a process of transmitting a pending sound during a call through a trunk line port connected to an external MOH music center according to an exemplary embodiment of the present invention. The operation according to the flowchart of FIG. 3 is programmed in the memory 110 to be performed by the controller 108 of FIG. 1. Now, embodiments of the present invention will be described in detail with reference to FIGS. 1 and 3.

First, the control unit 108 proceeds to step 302 while waiting for incoming calls at step 300 to check whether there is a call from outside. At this time, if there is an incoming call from the outside, the controller 108 proceeds from step 302 to 304 to check whether the corresponding (COD) or the extension is busy according to the incoming call from the outside. do. In this case, if the corresponding CO line or _ extension line is not in a call, the control unit 108 proceeds to step 316 and transmits a ring signal to the corresponding CO line or station as in a normal case, and transmits the ring signal to the external calling subscriber. Allow calls to be made between extension subscribers.

On the contrary, if the corresponding extension according to the incoming call from the outside is busy in step 304, the controller 108 proceeds to step 306 to check whether the pending sound transmission service is set. In this case, if the pending sound transmission service is not set, the control unit 108 proceeds to step 318 and does not send any pending sound to the calling party, and merely waits for the incoming call to the call waiting queue.

On the contrary, if the reserved sound transmission service is set in step 306, the control unit 108 proceeds to step 308 to determine whether the designated MOH source is an external MOH music source 118 or an internal MOH music source (not shown). Um) The external MOH music source 118 may be a music player such as a CD player, a cassette player, or the like, which is connected to a preset trunk line port of a key phone system as described above, and the internal MOH music source is Conventionally, it may be a melody IC for a pending sound transmission service mounted in one slot in the form of a card in a key phone system. In this case, if the designated MOH source is set to the external MOH music source 118, the controller 108 proceeds to step 310 and the preset trunk line port to which the external MOH music source 118 is connected to the incoming call for the pending sound transmission service. Connect with Then, the control unit 108 proceeds to step 312 and transmits the reserved sound from the external MOH music house 118 connected to the trunk line port to the calling subscriber through the trunk line port. The hold sound reproduced from the external MOH conservatory 118 is provided for the purpose of reducing the boredom of the calling subscriber during the waiting time, and may be a melody of a typical song, pop song, classical music, or the like. It may be a pre-recorded voice message or melody. Accordingly, the calling subscriber can hear the hold tone while waiting for the incoming subscriber to be busy.

On the contrary, if the MOH source specified in step 308 is set as the internal MOH music source, the control unit 108 proceeds to step 314 and transmits a pending sound from the internal MOH music source to the caller as in the normal case. Let's do it.

Another preferred embodiment of the present invention will be described in detail with reference to FIGS. 4 and 7.

4 is a block diagram of a digital key phone system according to another embodiment of the present invention.

In FIG. 4, the trunk card 10 includes a plurality of trunk line ports 1 to N, one end of each trunk line port is connected to the trunk line by a tip and a ring terminal, and the other end is connected to the codec 20. The codec 20 is connected to a trunk module control circuit 30 by a plurality of lines, and the trunk module control circuit 30 is connected to a time switch (T-S / W) 40. The time switch 40 is connected to each of a plurality of subscribers (general subscriber 70 and key phone subscriber 80), and is connected to a subprocessor (SP) 50 to be controlled. The SP 50 controls the switching operation of the time switch under the control of the main processor (MP) 60.

The trunk card 10 is a particular trunk line port designated as a music source port by the MMC of the trunk line port is connected to the external music source equipment, the music source input from the external music source equipment through the music source port is connected to the trunk module control circuit 30 The system is introduced into the SP 50 and the MP 60 of the system, and the MP 60 supplies the music source to the corresponding channel if there is a channel among the key subscribers.

5A, 5B and 5C are circuits for loop start trunk and caller identification according to another preferred embodiment of the present invention.

In the circuit of FIG. 5, DSS11, 21, and 31 are elements that protect the circuit from surges flowing from the trunk line. The ring coming from the CO line is detected by U21 (Optocoupler) through C11, R61, ZD102, U11 and supplied to the system.In the system, when the ring is detected, DP1 port is turned on to turn on the K1 loop relay. To form.

In addition, the system operates to turn on the K1 loop relay by driving the DP0 port at the time of transmission, and to drive the K1 loop relay even when a dial pulse is generated.

U11 is a hold circuit for loop formation. K11 relay is a relay for supplying caller identification signal to system by driving CIO port.

C11 blocks DC when the ring signal is input and passes only the ring signal AC, which has the same function as the caller identification signal.

The circuit of FIG. 5 specifies a circuit for one port, and configures a trunk card including a plurality of circuits identical to the circuit of FIG. 5 to assign a port number for each port. In the key phone system, a user has as many trunk cards as the number of lines required. Among them, a trunk line of a specific port that is not in use is designated as an MOH music source port using MMC (Man Machine Communication) to serve an external MOH music source. When a specific trunk port is designated as an MOH music source port on the MMC, the CIO port of the corresponding port is driven to always turn on the K11 relay so that an external MOH music source device is connected to the tip and ring terminals to be supplied to the system. Connect to the external MOH music source input from the external MOH music house equipment.

6 is a control flowchart for designating an external MOH music source supply port according to another embodiment of the present invention.

7 is a control flowchart for supplying an external MOH music source according to another embodiment of the present invention.

4 to 7, another preferred embodiment of the present invention will be described in detail. First, a method of designating an external MOH music source supply port will be described with reference to the flowchart of FIG. 6.

In step 601, the MP 60 checks whether a program mode is designated through a key input unit (not shown), and if the program mode is specified, proceeds to step 605, and if there is a key input other than the program mode, proceeds to step 603. Do this. In step 605, the MP 60 checks whether an external MOH music source designation MMC number is input. If the external MOH music center designation MMC number is input, the process proceeds to step 609, and if the external MOH music center designation MMC number is not entered, the process proceeds to step 607 to perform the corresponding MMC designation service.

The external MOH conservatory designation MMC number is the MOH conservatory port number. In step 609, the MP 60 receives the MOH music source port number from a user. Thereafter, in step 611, the MP 60 checks whether the MOH music source port number is a CO line number, and if the CO line number is used, proceeds to step 613 to turn on the caller identification relay (K11 relay in FIG. 5A) of the CO line. If the input music source port number is not a trunk line, it may be terminated or may be controlled to perform the MOH music source port number input process again, although not shown in the drawing.

In this way, when the relay is turned on by designating a specific CO line as an external MOH conservatory port, the tip and ring terminals of the corresponding port are connected to an external MOH conservatory device that is provided separately, and then the music source supply function is performed through this port.

This music source supply method will be described with reference to the flowchart of FIG.

In step 701, the MP 60 checks whether an MOH music source port is designated, and proceeds to step 703 if the MOH music source port is designated. If not, the MP 60 ends the program execution mode. In step 703, the MP 60 checks whether the relay of the corresponding CO line is on and proceeds to step 705 if it is turned on, and returns to step 701 if it is turned off. In step 705, the MP 60 checks whether an external MOH music source device is connected to a CO line designated as the MOH music source port, and if the MOH music source device is connected, proceeds to step 707. Return to the step.

In step 707, the MP 60 supplies a music source received from the external MOH music source equipment through a CO line designated as the MOH music source port to the system. Thereafter, the MP 60 checks whether the MOH music source using channel is generated, and when the MOH music source using channel occurs, connects the corresponding channel in step 711 and supplies the external MOH music source to the corresponding channel in step 713.

On the other hand, in the detailed description of the present invention has been described with respect to specific embodiments, various modifications are of course possible without departing from the scope of the 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.

As described above, the present invention can be provided from an external MOH conservatory by allocating an unused trunk line port in the keyphone system, so that it is not necessary to add additional hardware for the pending sound transmission service to the keyphone system. There is an advantage of the cost reduction, and also has the advantage that the problem of reducing the line band due to the hardware occupied a separate slot in the conventional keyphone system for the reserved sound transmission service. In addition, there is an advantage that can provide a much wider variety of holding sounds than conventional internal MOH music sources.

As described above, the present invention designates the remaining port among the ports of the trunk card equipped with the caller identification relay as the music source port, thereby realizing the music source function required by the system by using the CO line card, thereby reducing the use of additional components. It has been reduced, thereby improving the economics.

Claims (4)

In a call pending device for transmitting a call during a phone system, CO line circuit that forms a CO line loop by scissors the CO line, An external M.O.M. conservatory connected to one trunk line port that is not in use among the trunk line ports provided in the trunk line circuit for transmitting a pre-recorded reserved sound for the pending sound transmission service to the trunk line port; , When the call is switched to the corresponding extension of the key phone system that is required to be received from the outside through the CO line or the incoming subscriber is busy, the incoming call is connected to the CO line connected to the external M.H. A holding sound transmission service device in a key phone system, characterized in that the control unit for controlling to transmit the held sound. In the method for transmitting the pending sound in the key phone system, The process of connecting to an external M.O.H conservatory through one COS port not in use among the CO lines provided in the CO line circuit, If there is a call received from the outside through the trunk line circuit to the key phone system, checking whether the incoming subscriber of the corresponding extension required to be called is busy; If the incoming subscriber is on a call, checking whether a pending sound transmission service is designated in the key phone system; If the hold sound transmission service is specified in the key phone system, the incoming call is connected to a trunk line connected to the external M.H.H. Conservatory to pre-recorded music for M.O.H. Hold sound transmission service method in a key phone system, characterized in that made in the process of transmitting a. Among the trunk line ports of trunk card equipped with caller identification relay, one trunk line port which is not in use is connected to the external M.H.H. In the method of sending out, The first process of connecting the caller identification relay of the corresponding CO line to the external M.H. music conservatory equipment when one CO line port which is not in use is designated as the external M.H. conservatory port; , A second process of supplying the M.H.H. conservatory received through the CO line designated as the external M / O.H. Conservatory port to the system; If the external M.H. H music conservatory use channel occurs after the second process, the corresponding channel is connected to supply a music source received from the external M. H. H conservatory equipment to the corresponding channel. How to play a pending sound on your phone. The method of claim 3, wherein The external M. O. H music conservatory port designation is performed by the MC MC keyphone system, characterized in that the pending sound transmission service method.