KR19980013936A - Call service method of electronic simple switching equipment - Google Patents

Abstract

The present invention stores phone numbers of a calling subscriber in an incoming call service in an electronic simple switching device, and selects a phone number stored in an outgoing call service and dials the phone number with one touch. To this end, according to an embodiment of the present invention, a call service method of an electronic simple switching system connected to a network end analyzes a type classification code of a calling subscriber when an incoming call service is performed and stores a code and a telephone number of a calling subscriber in a corresponding subscriber table And displays a code and a telephone number of the selected subscriber in an outgoing call service, and dials a displayed code and a telephone number in an outgoing command to perform an outgoing call.

Description

Call service method of electronic simple switching equipment

The present invention relates to a call service method of an electronic simple switching system, and more particularly, to a method of storing an information of a calling subscriber in an incoming call service and selecting an information from stored information to perform an outgoing call.

Typically, the electronic simple switching device may be a private branch exchange (PABX), a key telephone system, or the like. Here, it is assumed that the electronic simple switching apparatus is a key telephone system.

1 shows a configuration of a key telephone system. The central processing unit 111 controls the overall operation of the key telephone system to control call switching and provide various services to a user. The memory unit 112 stores programs and initial service data of the central processing unit 111 for performing basic calls and various functions, and temporarily stores data processed by the central processing unit 111. [ The memory unit 112 includes a ROM for storing program and service data, and a RAM for temporarily storing data generated during program execution. The clock circuit 113 generates current time data as a clock chip IC and outputs it to the central processing unit 111.

The switching circuit 114 switches various tones and voice data under the control of the central processing unit 111. The general subscriber circuit 115 supplies a call current to a general telephone (not shown) under the control of the central processing unit 111 and also interfaces signals between the general telephone and the switching circuit 114. The ring generator 116 generates a ring signal and supplies it to the subscriber line. The keyphone subscriber circuit 117 transmits and receives various data to and from the key telephone (not shown) under the control of the central processing unit 111, and supplies a communication current to the key telephone and interfuses a signal between the key telephone and the switching circuit 114. Here, the key telephone and the general telephone become extension subscribers. Also, the line connecting the subscriber circuits 115 and 117 to the subscriber is a subscriber line. The tone generator 118 generates various tone signals under the control of the central processing unit 111 and outputs them to the switching circuit 114. The CO line circuit 119 seizes the CO line under the control of the central processing unit 111 to form a CO line loop and interfaces the signal between the CO line and the switching circuit 114. The CO line circuit 119 may be a digital CO line circuit for an ISDN (Integrated Sevices Data Network). Here, the CO line refers to a line connecting the CO line circuit 119 and the public switching center. The DTMF receiver 120 analyzes the DTMF signal input from the switching circuit 114, converts the DTMF signal into digital data, and outputs the digital data to the central processing unit 111. The DTMF signal input to the DTMF receiver 120 by 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 121 converts the digital data output from the central processing unit 111 into a DTMF signal and outputs the DTMF signal to the switching circuit 114. Here, the DTMF signal for outputting the DTMF transmitter 121 is the telephone number of the trunk line subscriber generated when the trunk line side is called in the extension side.

As described above, a call setup message for establishing a call and a call release message for releasing a call are set up and restored between ISDN switching centers. At this time, the structure of the call setup message includes a message ID indicating a message type, a calling party number storing a telephone number of a calling subscriber, a type of number of a calling subscriber number, And a called party number for storing the telephone number of the called party.

At this time, the electronic simple switching system including the digital trunk line circuit 119 connected to the ISDN trunk line receives the call setup message from the public switching system in an incoming call service from the ISDN network. However, the conventional electronic simple switching system stores the telephone number of the calling subscriber as it is in the call setup message without storing additional information corresponding to the type classification code and storing the telephone number of the calling subscriber. Therefore, the telephone number of the stored calling subscriber is not assigned an international telephone or a long distance telephone code.

At this time, the telephone number of the calling subscriber stored at the time of call setup as described above can be used for an outgoing call by performing a later search function. That is, the user can select the telephone number of the calling subscriber stored in the memory at the time of the incoming call service to perform the outgoing call function. In such a case, the conventional electronic exchange apparatus performing the called call service as described above can perform the outgoing call mode for the local telephone, and does not perform the outgoing call mode for the international call and the long distance call.

Accordingly, it is an object of the present invention to provide a method of adding a telephone number of a calling subscriber and additional information of a type classification code corresponding to a calling subscriber in an electronic simplex switching apparatus in an incoming call service.

It is another object of the present invention to provide a method for searching for and selecting a telephone number of a subscriber stored in an incoming call service for an outgoing call service in an electronic simple switching system to perform a dial function.

It is another object of the present invention to provide a method for storing an information of a calling subscriber when an electronic call switching service is performed in an electronic simple switching system and selecting an information from stored information to perform an outgoing call.

In order to accomplish the objects of the present invention, a call service method of an electronic simple switching system connected to a network terminal analyzes a type classification code of a calling subscriber when an incoming call service is performed and stores a code and a telephone number of a calling subscriber in a corresponding subscriber table And displays a code and a telephone number of the selected subscriber in an outgoing call service, and performs dialing by dialing a code and a telephone number being displayed at the time of an outgoing command.

1 is a view showing a configuration of an electronic simple exchange apparatus;

2 is a flowchart illustrating a process of classifying and storing calling subscriber information of an incoming call according to an embodiment of the present invention.

3 is a flowchart illustrating a process of searching for information stored in an incoming call service and performing an outgoing call according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same parts of the drawings denote the same reference numerals whenever possible.

The electronic simplified switching device for carrying out the embodiment of the present invention is assumed to be a key telephone system, and the configuration of the key telephone system is the same as that of FIG. 1, and the same reference numerals are used.

An incoming call applied at the digital trunk line circuit 119 of the above-described electronic simple switching device is provided as a part of the layer 3 message of the hierarchical structure of the ISO OSI. And the internal subscriber of the electronic simple switching apparatus can distinguish the calling subscriber by using the message. In addition, the calling number of the calling subscriber can be used as a function for calling outgoing call when performing the outgoing call mode in the future.

Referring to FIG. 1, the central processing unit 111 controls the overall operation of the switching device to control the call switching to provide various services to the subscriber. The CO line 119 interfaces with the network termination in a digital manner to detect an incoming call and control outgoing calls from the subscriber. In the embodiment of the present invention, the incoming call through the CO line circuit 119 is only applicable to digital incoming calls, and when a call is accessed only to a bearer service through the processing of Layer 1, Layer 2 and Layer 3, Additional services can be provided. The embodiment of the present invention provides a more convenient user function in the processing method of the Calling Line Identification Presentation (CLIP) service among the additional services.

FIG. 2 is a flowchart illustrating a process of storing a complete telephone number of a calling subscriber by adding a type classification code to a telephone number of a calling subscriber received in an incoming call service according to an embodiment of the present invention.

Referring to FIG. 2, if an incoming call is applied to the CO line circuit 119, the controller 111 detects the incoming call in step 111. Upon detecting the incoming call, the controller 111 analyzes the call setup message received from the CO line circuit 119 to check whether the telephone number of the calling subscriber has been received. If the telephone number of the calling subscriber is received in the call setup message, the subscriber further checks the type classification code of the telephone number of the calling subscriber in step 215. At this time, the call setup message includes a telephone number of a calling subscriber and a type classification code, and the call setup message is divided into an international telephone code, a long distance telephone code, and a local telephone code according to the telephone number of the calling subscriber.

Therefore, if the type classification code is an international call in step 215, the central processing unit 111 assigns an international phone code to the calling subscriber's phone number in step 217, and then, in step 221, And stores the telephone number of the calling subscriber along with the international telephone code. If the type classification code is a long distance telephone in step 215, the central processing unit 111 assigns a long distance telephone code to the telephone number of the calling subscriber in step 219, and then transmits a long distance telephone code to the calling subscriber table of the memory unit 112 Together, the telephone number of the calling subscriber is stored. If the type classification code is a local telephone in step 215, the central processing unit 111 stores only the telephone number of the calling subscriber without a code in the calling subscriber table of the memory unit 112 in step 221. [

After storing the calling subscriber's code and telephone number in the calling subscriber table area allocated to the RAM area of the memory unit 112 as described above, the controller 111 can display the code and the telephone number in the display area of the subscriber's telephone in step 223 The display data is output. In step 225, the controller 111 controls the switching circuit 114 to connect the corresponding trunk line of the trunk circuit 119 to the corresponding subscriber port of the subscriber circuit 115 or 117 to form an incoming call path, and then perform an incoming call service.

FIG. 3 illustrates a process of searching for a telephone number of a calling subscriber stored in a subscriber table allocated to a RAM of a memory unit 112 after performing an incoming call service and performing a calling function by performing one-touch dialing function according to an embodiment of the present invention Fig.

Referring to FIG. 3, a subscriber having a telephone having a display unit hooks off, and then presses a search key for searching for a telephone number of a calling subscriber stored in an incoming call service process. Then, the central processing unit 111 detects the hook-off state of the corresponding subscriber port of the subscriber circuit 115 or 117, and then controls the switching circuit 114 to connect the corresponding subscriber port of the subscriber circuit 115 or 117 to the DTMF receiver 120, And analyzes the key data received at the receiver 120.

At this time, if the received key data is key data for searching the telephone number of the calling subscriber, the central processing unit 111 detects the search function in step 311. In step 313, the central processing unit 111 accesses the telephone number of the calling subscriber stored in the table area of the corresponding subscriber allocated to the RAM of the memory unit 112, and outputs the telephone number to the switching circuit 114. Then, the telephone number of the calling subscriber is displayed on the display unit of the subscriber telephone through the corresponding subscriber's port. Here, the telephone number displayed on the display unit of the subscriber telephone becomes the code of the calling subscriber + the telephone number. That is, if the calling subscriber is an international call, the displayed telephone number is the international telephone code and the telephone number of the subscriber. If the calling subscriber is a long distance telephone, the displayed telephone number is the long distance code and the telephone number of the corresponding subscriber. The displayed telephone number is the telephone number of the subscriber.

If the telephone subscriber generates key data for selecting a telephone number of another calling subscriber in the state that the telephone number of the calling subscriber is being displayed as described above, the central processing unit 111 detects this at step 315, And outputs the code and telephone number of the calling subscriber to the port of the corresponding subscriber. Here, the selection key may set a particular key of the telephone as an up / down function. Then, the central processing unit 111 designates the address of the table of the subscriber according to the operation of the up / down key by the telephone subscriber, and reads and outputs the code and telephone number of the calling subscriber stored at the corresponding location.

After selecting the code and the telephone number of the desired calling subscriber by repeating the above selection operation, the central processing unit 111 detects the calling command in step 319, And outputs the code and telephone number of the calling subscriber to the DTMF generator 121. [ Herein, the originating key may use a redial key. Then, in step 323, the central processing unit 111 controls the switching circuit 114 to form a call path by connecting the corresponding CO line to the corresponding subscriber port, and then performs an outgoing call function do.

In the call service process according to the embodiment of the present invention, an incoming call is detected from the CO line circuit 119 and an incoming call including a telephone number of the calling subscriber is checked , And if the incoming call is not the incoming call receiving the telephone number of the calling subscriber, it performs the normal call mode and ends the call. The above-mentioned incoming call service is performed through steps 211, 213, and 225.

Secondly, if the incoming call is an incoming call receiving the telephone number of the calling subscriber, the type classification code for the calling subscriber's telephone number is searched. If the calling subscriber's telephone number is a call that receives the type classification code for the telephone number of the calling subscriber, And stores the telephone number of the called subscriber in the corresponding subscriber table allocated to the RAM of the RAM, and supplies the incoming ring signal to the called subscriber, and then performs a call mode. And the telephone number of the calling subscriber thus stored can be dialed by the one-touch dialing function at the time of performing the outgoing call mode as shown in FIG. The above-described incoming call service is performed through steps 211-213, 215-221, 223-225.

Thirdly, if the calling subscriber's telephone number of the incoming call has a long distance code, it stores the long distance code and the telephone number of the calling subscriber in the corresponding subscriber table allocated to the RAM of the memory 113, After supplying, perform call mode. At this time, the long distance code inserted at the beginning of the telephone number of the calling subscriber is zero. That is, when a calling subscriber having a telephone number 0331 261 3055 requests an outgoing call, the telephone number received by the electronic side simple switching equipment is 331 261 3055. Therefore, in the process of checking the type classification code, 0 is inserted at the beginning of the telephone number and stored as 0331 261 3055. The above-mentioned incoming call service is performed through steps 211-213, 215, 219, 221, 223, and 225. In this case, the user is selected through a search and selection process when performing the calling subscriber's phone number search mode in the outgoing call mode as shown in FIG. 3. Since the long-distance code 0 is already inserted and stored in FIG. 2, Can be performed. At this time, if the long-distance code is not inserted in the incoming call service process as shown in FIG. 2, even if the search is successful, the remote dialing can not be performed.

If the calling subscriber's telephone number of the incoming call has the international telephone code, it stores the international telephone code and telephone number in the corresponding subscriber table allocated to the RAM of the memory 113, and supplies the incoming ring signal to the called subscriber Then, the call mode is performed. At this time, the international telephone code is inserted at the beginning of the telephone number of the calling subscriber. The international telephone code is a country code in which the calling subscriber is located. The service of the above-mentioned incoming call is performed through steps 211-213, 215-213, 223-225. In this case, the caller's phone number search mode is selected through the search and selection process in the outgoing call mode as shown in FIG. 3. Since the international call code is already inserted and stored in FIG. 2, Can be performed.

As described above, when the electronic simple switching system connected to the network terminal through the ISDN line services the incoming call, the message of the layer 3 provided from the network terminal is analyzed to store the code and telephone number of the calling subscriber together, When performing the outgoing call mode, the subscriber searching for the outgoing subscriber code and telephone number stored in the telephone subscriber can be selected and the outgoing call function can be performed with one touch.

Claims (5)

The method of claim 1, further comprising the steps of: receiving a call setup message at the time of an incoming call; analyzing the type classification code of the calling subscriber in the call setup message; The international telephone code and the telephone number of the calling subscriber are stored in the corresponding subscriber table, the long-distance code and the telephone number of the calling subscriber are stored in the corresponding subscriber table when the long distance telephone call is made, and the telephone number of the calling subscriber is stored when the local telephone is called Wherein the electronic short-distance switching device comprises: 2. The method according to claim 1, wherein the call setup message includes a message ID indicating a set-up message, a calling party number indicating a telephone number of the calling party, a type classification code indicating a type of calling party, And an incoming subscriber number for displaying a telephone number. A method for an outgoing call service of an electronic simplex exchange apparatus connected to a network terminal by analyzing a type classification code of a calling subscriber in an inbound call service and storing a code and a telephone number of a calling subscriber in a corresponding subscriber table, And a calling party mode in which a code and a telephone number of a calling subscriber stored in a table are selected and displayed and a code and a telephone number of a calling subscriber being displayed at the time of a calling command are dialed, A method of outgoing call service of an exchange. A call service method of an electronic simple switching system connected to a network terminal, the method comprising the steps of: analyzing a type classification code of a calling subscriber in an incoming call service and storing a code and a telephone number of a calling subscriber in a corresponding subscriber table; And a dialing code for dialing a code and a telephone number displayed at the time of an outgoing command to perform an outgoing call. 5. The method according to claim 4, wherein the call setup message includes a message ID indicating a set-up message, a calling party number indicating a telephone number of the calling party, a type classification code indicating the type of calling party, And a called subscriber number for indicating a telephone number.