KR960008428B1 - Communication channel setup and release method for digital subscriber line call processing - Google Patents

Abstract

No content.

Description

Communication channel setup and release method for digital subscriber line call processing

1 is a related hardware block diagram for implementation and function processing of a circuit switched call origination processing section to which the present invention is applied;

2 is a software block diagram showing function distribution and interaction for digital subscriber circuit call origination processing according to the present invention.

3 is a software block diagram showing the interworking relationship between the digital subscriber line call origination processing unit and the analog subscriber subscriber processing unit according to the present invention.

4 is a signaling procedure between a network and a user for explaining the present invention. Diagram of interaction and digit transmission mode between called processing unit.

5 is a detailed processing flowchart of a digital subscriber circuit switched call origination processing unit according to the present invention and a matching diagram of a related functional unit.

* Explanation of symbols for main parts of the drawings

11: USER Terminal Equipment

12: Digital subscriber access switch subsystem (ASS-1) of electronic switching system

13: user terminal matching device (TIU) 14: switch unit

15: Integrated Information Communication Network Subscriber Access Processor (ISAP)

16: Signal Service Processor (LSP) 17: Time Switch Processor (TSP)

18: Digital Subscriber Match Exchange Processor (ASP-I)

20: Digital subscriber line call origination processing unit 21: Layer 2 originating and receiving processing unit

22: digital subscriber line call incoming processing unit 23: switch control unit

24: number translation

The present invention is a batch transmission method and a nested transmission method, and a digital subscriber and an analog subscriber, which are digital transmission methods used when providing circuit switched call services through two types of basic access and primary access interfaces, which are standardized interfaces of digital subscribers. Set up and release communication channel during digital subscriber circuit call outgoing process to provide digital subscriber circuit call service that implements ISDN signal processing and call processing function between modules when interworking function and circuit switching basic service are provided. It is about a method.

In the public switched telephone network, which is a conventional dedicated service network, the analog subscriber control technology does not have a separate control signal channel using a compromised control procedure of the integrated telecommunication network, and the digit transmission method is similar to the overlapped transmission method in the integrated telecommunication network. Due to the relatively simple implementation method using the scheme, there was a problem of low compatibility with other networks due to a dedicated service network in a circuit switched call.

The present invention has been made to solve the above problems, digital subscriber circuit call in the electronic switching system to provide a digital subscriber circuit switched call service as a terminal according to the purpose to receive a variety of services through the ISDN interface As a method to be applied to realization of outgoing processing unit, it has a function that fully reflects the characteristics of digital subscribers. It is an object of the present invention to provide a method for setting and releasing a communication path in the outgoing processing of a circuit call to be realized.

In order to achieve the above object, the present invention provides a layer 2 originating / receiving processing unit that performs a function of transmitting and receiving a signal on a signal channel such as data link management between an ISDN user and a network, and an ISDN user and manganese signal processing mounted thereon. Digital subscriber line call origination processor, which interacts with the incoming processing unit and inter-layer primitives, Digital subscriber line call reception processor, which processes the digital subscriber circuit call service by interaction with the modular digital subscriber line call originating processor, and the digital Switch control unit which is connected to subscriber line call originating processing unit and performs switch connection which is the main function of digital subscriber line call service, is applied to the whole system and is mounted on a specific processor and interacts with signals between related processors. Interact with outgoing processor for each function A method of performing outgoing processing of a digital subscriber line call with a number translator for performing the following: In case of an ISDN originating subscriber, the originating processor receives the calling party subscriber information when the layer 2 processor notifies the originating processing procedure. After performing the first step of checking the transmission mode and performing the first step, if the overlapping transmission method does not exist depending on the existence of the called party address, the switch controller connects the switch between the network and the calling party. The second step of notifying the switch release request, cutting off the dial tone, and receiving all the information necessary for establishing the communication, or notifying that the call is in progress if the batch transmission method is performed. The incoming call processing unit notifies the calling processing unit of the request for information transmission. If the outgoing processing unit makes a call connection request to the switch control unit to establish a call path and informs the incoming processing unit of necessary information when the incoming call is received, after performing the third step, the incoming processing unit requests the incoming call from the layer 2 processing unit. Receive notification of incoming subscriber call and notify to switch control unit and originating processing unit, and originating processing unit notifies back to layer 2 processing unit. After performing the fourth step, incoming processing unit connects incoming subscriber connection notification from layer 2 processing unit. When the notification is sent to the originating processor and notified to the switch controller to connect the communication path, the switch controller establishes the network communication channel and the originating processor has a fifth step of notifying the calling subscriber through the layer 2 processor. A channel setting procedure for bringing a circuit switched call into a communicating state and a communication channel setting procedure After completion, the source processing unit receives the communication disconnection notification from the layer 2 processing unit, notifies the switch control unit of the request to release the communication path, and cuts the communication path. Notified off. Receiving the completion of the calling party to notify the layer 2 processing unit to release network resources such as a channel and data link using communication, terminating the function of the calling processing unit, and after performing the sixth step, the called processing unit is the oscillation processing unit. Receive the caller release notification from the caller, cause the switch controller to cut the call path, notify the caller disconnect request to the layer 2 processor, and notify the switch control request to the switch controller when the caller release notification is received from the layer 2 processor. After the seventh step of releasing the network resources such as the channel used for communication between the network and the called party and notifying the completion of the release of the called party to the layer 2 processing unit, the called party can perform the necessary processing and terminate the function of the called processing unit. It characterized by consisting of a release procedure.

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

1 is a hardware block diagram to which the present invention is applied.

In the figure, 11 is a user terminal equipment, 12 is a digital subscriber access switch subsystem (ASS-1) of the electronic switching system, 13 is a terminal interface unit (hereinafter referred to as TIU), 14 is a switch unit, 15 is an ISDN Subscriber Access Processor (hereinafter referred to as ISAP), 16 is a Local Service Processor (hereinafter referred to as LSP), 17 is a Time Switching Processor Hereafter referred to as TSP). 18 denotes a Digital Subscriber Match Exchange Processor (hereinafter referred to as ASP-I).

As shown in the drawing, the present invention is to match the terminal used as a terminal having a general information communication network basic access interface (hereinafter referred to as a TEI) or a terminal used in a public switched telephone network so that the general information communication network can be used. The main terminal is a terminal matching device (terminal TA), which has a function corresponding to a service type-specific function, that is, a user terminal device 11 having a function for teleservice as well as a bearer service, and the user terminal device 11 ) Is an access switch subsystem that accepts only digital subscribers from the electronic switching system, and categorizes basic and primary access interface subscribers by unit and is the minimum hardware module of the electronic switching system for providing internal communication services. ASS-1 (12), connected to the user terminal device (11) This function performs interface matching function for each user terminal and layer 1 and 2 functions, and extracts B and D channel information to transmit and receive pure information to the switch unit and signal information to and from the ISAP using layer 2 and 3 primitives. Terminal Interface Unit (hereinafter referred to as TIU) 13, Switch unit 14 (connected to the TIU 13) to provide a communication path of pure information exchanged between the user terminal device (the switch unit 14 Between the TIU 13 and the basic access interface digital subscriber, two physical access paths of 23 or 30 pure information are set for the primary access interface digital subscriber.), And the TIU 13 It is connected to the switch unit 14, ISAP (15) for implementing a block digital subscriber interface (Digital Subscriber Interface) for controlling the communication between the CCITT standard network layer 2.3 and used for communication connection and progress A block that provides a signal service function (Local Service Interface: LSI), which is a processor on which the LSP 16 is mounted, and is connected to the switch unit 14 to perform a Time Slot Interchange (Time Slot Interchange); A block time switch (TSL), which provides a TSI) function and an aggregation function, is mounted, and is a processor for controlling the switch unit, the TSP 17, the ISAP 15, the LSI 16, and the TSL (TSL). 17 is a processor connected to the ISDN user-network layer 3 and a digital subscriber circuit mode control (hereinafter referred to as DCC) that performs digital subscriber communication processing. ASP- with modular structure that distinguishes originating / receiving unit that independently operates originating processing unit (Originating DCC; hereinafter called DCC_org) and terminating processing unit (Terminat-ing DCC; hereinafter, DCC_term). It consists of I (18).

In the above configuration, the layer 1 and 2 functions of the ISDN network-side function of the CCITT recommendation and the electronic switching system are performed in the TIU 13, and the layer 3 functions are the ISAP 15 and the ASP-I (18). Is performed in The digital subscriber line call origination processing function implemented in the ASP-I 18 is composed of an ISDN user and a network matching function and a call processing function.

2 is a block diagram showing the interaction between a function performed in a digital subscriber circuit call origination process and a related function in a network, in which FIG. 20 is a digital subscriber circuit call origination processor, 21 is a layer 2 origination / reception processor, 22 Denotes a digital subscriber line call destination processing unit, 23 denotes a switch control unit, and 24 denotes a number translation unit.

Each function is implemented as an independent processor or a process that is executed in parallel with each other independently in the same processor to perform unique functions. This has structural advantages that make it easy to modularize, supplement, and manage each function. Each function is completed by the interaction between the processors, the common library, and the common data.

Referring to each functional unit, first, the layer 2 originating / receiving processing unit 21 performs a function of transparently transmitting and receiving a signal on a signal channel such as data link management between an ISDN user and a network, and the digital subscriber line call origination processing unit 20. And interact with each other through inter-layer primitives.

Digital subscriber origination processing executed in the digital subscriber line call origination processing unit 20 can be divided into ISDN user and manganese signaling and call processing. It is limited to the processing unit 21 and the digital subscriber line call origination processing unit 20, and is implemented. The service subscriber interworking process between the digital subscriber and the analog log subscriber is performed by interworking the process with the analog subscriber reception processing unit (not shown). The maintenance function (not shown) and the system maintenance function using the common data between the local data and the process in the digital subscriber circuit call origination processing section 20 for billing, statistics, and management functions, and for subscriber test, fault diagnosis, and isolation. Perform. It is connected to the network resource management unit (not shown) and manages resources such as system load control and system capacity to support digital subscriber circuit call incoming call processing through a common library.

The digital subscriber line call incoming processing unit 22 processes the digital inter-subscriber service by the interaction of the modular digital subscriber line call, call, and incoming call processing units 20 and 22.

The switch control unit 23 performs a switch connection which is a main function of the digital subscriber line call service.

The number translation unit 24 dedicated to number translation is a function that is commonly applied to the whole system and is mounted on a specific processor and interacts with signals between related processors, and interacts with the digital subscriber line call origination processing unit 20. Perform each function.

FIG. 3 is a diagram illustrating an interface between the analog subscriber receiver and the digital subscriber line call origination processor in FIG. In other words, it is a block diagram showing the interaction for service compatibility between digital / analog subscriber line calls. The interface between the originating / receiving processing units used for call service between analog subscribers is sent to the digital subscriber line, and the same when the analog subscriber line is received. It can be given compatibility by applying it.

However, the digital subscriber circuit call origination processing unit 20 must perform the necessary processing according to the out-of-band information unavailable for the incoming subscriber circuit call differently from the digital subscriber circuit call incoming processing. The switch control unit 23 for connection and the number translation unit 24 for number translation are the same as the common function of call processing, and are processed in the same way as the call processing between the subscribers.

In response to the number translation request of the digital subscriber line call originating processor 20, when the subscriber register processing unit through the number translation unit is generated, the subscriber subscriber line call processing unit 20 receives the subscriber subscriber notification, which is an inter-process signal, from the analog subscriber subscriber processing unit. The communication between the caller and the receiver is started by the notification. Subsequently, the switch connection using the switch control unit 23 of the digital subscriber line call originating processor 20 is performed, and the network transmits the switch connection notification, which is an inter-process signal, to the analog subscriber line call terminating processor. Grant the currency path between preferences.

Upon receiving and releasing the subscriber, the subscriber's incoming call processing unit notifies the digital subscriber line call originating processing unit 20 of the inter-processor signal, the incoming subscriber connection notification and the incoming subscriber release notification. Notify Subscriber's Recipient Processing Unit of the unsubscribe notification. The processing of each processing unit is the same as that of interworking between the analog subscribers and the subscriber subscriber line call.

4 is a diagram illustrating the interaction according to the processing according to the digital transmission mode of the layer 3 among the ISDN user-network matching function of the digital subscriber line call originating processor and the related receiver.

Call setup (SETUP) is a message received from the network side when a user initiates a call and includes characteristics of the user terminal, a call reference number, a digit transmission mode, and logical B channel information (41). The originating processing unit checks whether the system can service the validity of the call setup message, the validity of the message contents, the presence or absence of the B-channel assigned to the interface, and the digit transmission mode. If the digit transmission mode is Enbloc mode, the received digits are requested by the number translation unit 24 to request a number translation request to the incoming processing unit (63, 64) and the call proceeds to the user terminal (CALL PROCEEDING). Send a message. At this time, the user terminal should be provided with a tone resource for providing a dial tone to inform the user of the call progress, the network includes the display information and information elements of the interruption of the dial tone in the call progress message and transmits it to the user terminal (49).

When the digit transmission mode is the overlap mode, the user terminal sends a SETUP ACKWNOLEDGE message with information about the logical B-channel and the like (42). In addition, similar to the voice service, the analog subscriber provides a dial tone, which is in-band information through the B-channel, which is configured to allow the user to audibly recognize that the network can be processed (43). Thereafter, the network receives the called party digit from the user terminal through an information message (44). The number translation request for the digit received through the information message is requested to the number translation unit 24 using the 'number translation request' message (48, 63) and a call progress message indicating that the call is in progress to the user terminal ( 45).

As the originating / receiving unit interaction, the originating processing unit receives the 'calling subscriber information request' message, which is the originating terminal characteristic transmitting request, from the incoming processing unit (50). Accordingly, the originating processor notifies the called party processing unit of the terminal characteristic information received through the call setup message from the user terminal through the 'calling subscriber terminal information notification' message (41, 51). The originating processor receives a call (ALERT) message indicating that the called terminal is busy from the called processor (42). In response to this, the calling processor notifies the user terminal and transmits out-of-band information to the user terminal, if necessary, so that the calling tone is provided to the calling user (52, 53). When the originating processor receives 61 a CONNECT message indicating that the called terminal has responded from the called processing unit, it notifies the calling user terminal 54 of the answering message. Therefore, when the originating processor receives the CONNECT ACKNOLEDGE message as an acknowledgment message for receiving the response message from the calling terminal (55), it manages the network resource so that the circuit call service between the two subscribers through the B channel can be maintained without being cut. do.

When the called party releases the call, the calling party receives 62 a caller release call message, which indicates call release, and initiates call release. A DISCONNECT message is sent to the calling party terminal to initiate call release (56), and if necessary (57), a call tone is transmitted through the B-channel. Logical channel and call reference number used for the corresponding communication when receiving RELEASE message (58, 62) indicating call release from calling terminal. The function of the originating processor for the circuit call service is terminated by releasing all communication resources such as a switch and notifying 59 a RELEASE COMPLETE message to the originating terminal.

5 is a detailed process flow diagram for outgoing processing of a digital subscriber circuit switched call according to the present invention, and a layer 2 processor, a number translation unit, a switch control unit, an incoming processing unit (hereinafter referred to as an incoming processing unit) and a digital subscriber circuit exchange of a digital subscriber circuit switched call. The matching relationship with the originating processor of the call (hereinafter referred to as originating processor) is shown.

First, as an example of a communication setup procedure, in case of an ISDN telephone receiver originating subscriber, the originating layer 2 processor 21 notifies the originating processor 20 through the DL_ESTABLISH_REQ primitive to the same behavior as the hook-off of the handset. The originating processor 20 receives this and manages the state of storing and using the unique value for the data link use (70, 71).

The originating processor receives the calling party subscriber information from the originating layer 2 processor through the primitive DL_DATA (72, 73), and checks the transmission mode among the contents of the information (74). When the transmission mode is overlapping transmission method, the existence of the called party address is checked (75). If the called party address is not included at all, the switch control unit connects the switch between the network and the calling party through the inband band. Provide callers with a dial tone (76, 77).

When the survey 75 includes a part of the called party address, when the state of providing the calling party to the calling party is notified, the switch controller notifies the switch releasing request and cuts the provided calling tone (78, 79). If the survey 78 does not request the calling party address additional information to the calling layer 2 processor before (80), it is notified using the primitive DL_DATA to request the additional information (81), and the result of the survey 80 is set. If the acknowledgment signal has been transmitted, the process 72 is performed. Investigating whether all the information necessary for establishing communication is received from the calling party (82), and when all are received, the calling processing unit notifies that the call is in progress that all necessary calling party necessary information is received through the primitive DL_DATA (83, 84).

When the investigation 74 results that the transmission mode is the batch transmission method, the originating processor notifies that the call is in progress through the primitive DL_DATA (83, 84).

Subsequently, the originating processing unit notifies the destination address to the number translation unit. (24) and requests the number translation (85). The number translation unit 24 determines the location of the number translation and the called party (86) and notifies the destination processing unit. (87) The receiving processing unit that receives the incoming caller notifies the calling party information transfer request to the calling processing unit in order to obtain the information necessary for the incoming subscriber incoming request (88). The call processing unit receives the subscriber information transmission request from the call processing unit (89) and makes a switch connection request 90 to the switch control unit 23 to connect the call between the call subscriber and the network, and the switch control unit 23 connects the call subscriber and the network. A communication path is established through the inter-switch connection (91). The originating processor 22 notifies the called processing unit of information required for the incoming subscriber, such as the characteristics of the calling subscriber, received from the calling subscriber (92). The incoming processing unit 22 requests incoming calls to incoming subscribers using the calling party subscriber information received from the outgoing processing unit 20 (93, 94). The incoming processing unit 22 allocates the DL_DATA primitive and the data link (95) and receives notification during the called party's call from the incoming layer 2 processing unit 21 through the primitive DL_DATA 96 (97). The switch control unit 23 notifies the switch controller 23 of the switch connection request so that the ringback tone is provided through the inband band so that the calling subscriber can be audibly recognized that the incoming subscriber is calling (98-1), and the switch controller 23 switches the switch. Connect to provide the ringback tone to the subscriber (98). In addition, the receiving processing unit 22 notifies the calling subscriber that the incoming subscriber is calling (99), and the calling processing unit 20 receives the call 100 using the primitive DL_DATA so that ringback tone is provided through the out band when necessary. The layer 2 processor 21 notifies this (101.102). The incoming call processing unit 22 receives the incoming caller connection path from the incoming layer 2 processing unit 21 through the DL_DATA primitive by an action such as a hook-off (103) (104). ).

At this time, if the calling subscriber is providing the ringback tone, the switch control unit 23 notifies the switch releasing request to cut the ring back tone so that the ring back tone is cut by the switch control unit 23 (105 to 107). Subsequently, the incoming call processing unit 22 notifies the switch connection request to the switch control unit 23 to connect the communication path (108), and the switch control unit 23 receives this to establish a communication path between the called subscriber and the network (109). In addition, the incoming processing unit 22 notifies the incoming subscriber connection path to the originating processing unit 20 (110), the originating processing unit 20 receives this (111) and transmits the DL_DATA primitive to the originating layer 2 processing unit 21 to send The subscriber is notified (112,113).

This completes the communication setup procedure and puts the user in a busy state capable of communicating the necessary circuit-switched call between the calling subscriber and the called party through the established communication channel.

Finally, as the release procedure, when the subscriber communication is completed by an action such as a hook-on of the calling subscriber with the ISDN telephone, the calling processing unit 20 sends the call through the DL_DATA primitive from the calling layer 2 processing unit 21. The subscriber disconnection notification is received (114, 114). The transmission processing unit 20 receives this and notifies the communication channel release request to the switch control unit 23 to release the communication path (116), and the switch control unit 23 receives this and cuts the communication path between the network and the calling party. (117). Subsequently, the outgoing processing unit 20 notifies the outgoing subscriber release notification to the incoming processing unit 22 (118), and uses the primitive DL_DATA in accordance with the signaling procedure standard between the network and the user to the outgoing layer 2 processing unit 21 through the network-user. In addition, the originating processor 20 receives the completion of the subscriber release using the primitive DL_DATA from the originating layer 2 processor 21, thereby releasing network resources such as channels used for communication (122, 124). ), The primitive DL_REL_REQ is notified to the originating layer 2 processor 21 to terminate the data link, thereby terminating the function of the originating processor 20 (125, 126).

The receiving processor 22 receives the calling party release notification from the calling processing unit 20 and requests the switch controlling unit 23 to release the switch to disconnect the call between the network and the called party 119 (127). As a result, the switch control unit 23 releases the switch between the network and the called party to disconnect the call path (128). The incoming processing unit 22 notifies the incoming layer 2 processing unit 21 of the incoming subscriber cutting request through the primitive DL_DATA. (129, 130), the switch request to the switch control unit 23 so as to provide a ringing tone to the called subscriber through the in-band band if necessary (131). Subsequently, the switch control unit 23 connects the switch to provide a ring tone to the called subscriber (132).

The incoming call processing unit 22 receives the incoming caller release notification from the incoming call layer 2 processing unit 21 through the DL_DATA primitive by the same behavior as the handset hook-on when the ISDN telephone call receiving party (133, 134).

At this time, if the incoming call subscriber is provided with a ringing tone, the switch control unit 23 notifies the switch releasing request (135,136). The incoming processing unit 22 releases network resources such as a channel, which has been used for communication between network and destination subscribers until now (137), and notifies the destination layer 2 processing unit 21 of the completion of the called party release through primitive DL_DATA (138). Allow the called party to do the necessary processing (139). Subsequently, the main function of the terminating processing unit is terminated by notifying the terminating layer 2 processing unit 21 via the primitive DL_REL_REQ to release the data link (140, 141).

Therefore, the present invention has the advantage of easy design, testing, and improvement by modularization of digital subscriber originating function of the exchange and realization of the function, and existing function when the digital subscriber is initially added to the exchange controlling the existing analog subscriber. It is effective in matching technology between user-to-network signal processing and call processing function and digital / analog subscriber compatibility technology for digital subscriber control with minimal change.

Claims (7)

Layer 2 originating / receiving processing unit 21, which performs a function of transmitting and receiving a signal on a signal channel such as data link management between ISDN user and network, and the signal processing between ISDN user and network is installed, and the layer 2 originating / receiving processing unit 21; Digital subscriber line call origination processor 20 interacting through inter-layer primitives, and digital subscriber line call call processing unit 22 for processing digital subscriber line call services through interaction with the modular digital subscriber line call origination processor 20. A switch control unit 23 connected to the digital subscriber line call origination processing unit 20 to perform a switch connection, which is a main function of the digital subscriber line call service, is commonly applied to the entire system and is mounted on a specific processor and connected to a signal between related processors. Interacting. A method for performing a digital subscriber circuit call outgoing process comprising a number translation unit (24) for interacting with the digital subscriber circuit call origination processing unit (20) to perform each function; In the case of the ISDN originating subscriber, when the layer 2 processor 21 notifies the originating processor 20 to start the communication setting procedure, the originating processor 20 receives the subscriber information and examines the information transmission mode (70 to 74). After performing the first step (70 to 74), if the overlapping transmission method does not exist depending on the existence of the destination subscriber address, the switch controller 23 connects the switch between the network and the calling party, and if it exists, the switch controller A second step (75 to 84) and a second step (75 to 84) of notifying the switch release request to (23), cutting off the dial tone, and notifying that the call is in progress if all information necessary for establishing communication has been received or in a batch transmission method; After the execution, the originating processor 20 requests the number translation unit 24 to translate the address of the destination address, and the terminating processing unit 22 notifies the originating processor 20 of the calling party information delivery request. switch After the third step (85 to 93) and the third step (85 to 93) performing the third step (85 to 93) to establish a communication path by requesting the switch connection to the fisherman 23 and notify the destination processing unit 22 necessary information when the incoming call, The processing unit 22 makes an incoming request and receives notification of the incoming subscriber call from the layer 2 processing unit 21 and notifies the switch control unit 23 and the originating processing unit 20, and the originating processing unit 20 again performs the layer 2 processing unit 21. After performing the fourth step 94 to 102 and the fourth step 94 to 102, the incoming call processing unit 22 receives the incoming subscriber connection notification from the layer 2 processing unit 21 to the calling processing unit 20. 5th step of notifying, when notifying the switch control unit 23 to connect the communication path, the switch control unit 23 establishes the manganese communication path, and the originating processor 20 notifies the calling subscriber through the layer 2 processing unit 21. (103 to 113) consisting of a communication between the calling subscriber and the called party After the completion of the communication path setting procedure and the communication path setting procedure for making the communication state possible, the originating processor 20 receives the communication disconnection notification from the layer 2 processor 21 and notifies the switch controller 22 of the communication path release request. To disconnect the call path and notify the incoming caller release notification to the incoming call processing unit 22, the network-user release notification to the layer 2 processing unit 21, and receives the completion of the caller release to receive network resources such as channels, etc. And notifying the layer 2 processor 21 to release the data link to terminate the function of the originating processor 20, and after performing the sixth steps 114 to 126, the called processor 22 ) Receives the caller release notification from the call processing unit 20 to cut the call path to the switch control unit 23, notifies the incoming call cutting request to the layer 2 processing unit 21, and receives the caller from the layer 2 processing unit 21. release When receiving the report, the switch control unit 23 notifies the switch release request, and then releases the network resource such as a channel used for network-to-called subscriber communication and notifies the completion of the subscriber release to the layer 2 processing unit 21, And a communication channel release procedure comprising seventh steps (127 to 141) for making necessary processing and terminating the function of the incoming call processing unit (21). The method of claim 1, wherein the second steps (75 to 84); In the case of the overlapped transmission method, if the called party address is not included, connecting the switch between the network and the calling party to the switch controller 23 to provide a calling tone to the calling party through the inband band (74 to 77). In the case where the recipient address is partially included, when the state of providing the ring tone is provided, the switch control unit 23 notifies the switch releasing request to cut the ring tone (78, 79), the steps (74 to 77) and the After performing the steps (78,79), if it did not investigate and request that the subscriber address additional information was requested to the layer 2 processing unit 21, the subscriber control unit 23 requests the subscriber additional information and requests the additional information or the batch information. And (80 to 84) checking whether or not all information necessary for establishing a communication has been received from the calling subscriber in the transmission method. The method of claim 1, wherein the third step (85 to 93); When the originating processing unit 20 requests the number translation unit 24 to translate the destination address, the incoming processing unit 22 that has received the incoming call occupancy of the number translation unit 24 requests the transmission of the subscriber information to the originating processing unit 20. (85 to 89), and after performing the steps (85 to 89), the transmission processing unit 20 receives the subscriber information transfer request from the incoming processing unit 22 and requests the switch connection to the switch control unit (23) In step (90 to 93), the switch controller 23 establishes a call path by making a switch connection between the calling subscriber and the network, and the calling processing unit 20 notifies the called processing unit 22 of necessary information when the incoming call is received from the calling subscriber. A method for setting and releasing communication paths during digital subscriber line call origination processing, characterized in that the connection is made. The method of claim 1, wherein the fourth steps (94 to 102); The incoming processing unit 22 requests incoming calls to the incoming subscribers by using the calling party subscriber information from the outgoing processing unit 20, receives the notification of incoming call from the layer 2 processing unit 21, and requests the switch connection to the switch control unit 23. (94 to 98-1) of notifying, after performing the steps (94 to 98-1), the switch control unit 23 connects the switch to provide a ringback tone to the calling party and the incoming call processing unit 22 is the called party When notifying the calling subscriber that the calling party is busy, the calling processing unit 20 uses the received information to notify the calling second processing unit to provide a ringback tone through the outband (99 to 102). How to set and release channel when preferring outgoing call. The method of claim 1, wherein the fifth step (103 to 113); The incoming processing unit 22 receives the incoming subscriber connection notification from the layer 2 processing unit 21 and notifies the calling control request to the switch control unit 23 to cut the ringback tone when the ringing tone is being provided to the calling party. After performing steps 103 to 107 and the steps 107 to 107, the incoming processing unit 22 notifies the switch connection unit 23 of the switch connection request to connect the communication path, and the switch control unit 23 connects the incoming subscriber to the manganese. Establishes a communication path and the reception processing unit 22 notifies the originating subscriber connection notification to the originating processing unit 20, and the originating processing unit 20 includes steps 108 to 113 that notify the calling subscriber to be in a communication state. A method for setting and releasing communication paths during digital subscriber line call origination processing. The method of claim 1, wherein the sixth step (114 to 126) is performed; When the communication is completed, the transmission processing unit 20 receives the calling subscriber communication disconnection notification from the layer 2 processing unit 21 and notifies the communication path release request to the switch control unit 23 to release the communication path, and the switch control unit 23 transmits the network. And cutting the inter-subscriber call path, and the originating processor 20 notifies the outgoing subscriber release notification to the incoming processing unit 22 and notifies the network-user release to the layer 2 processing unit 21 (114 to 121). . After performing the steps 114 to 121, the origination processor 20 receives the completion of the subscriber release from the layer 2 processor 21 and notifies the layer 2 processor 21 to release the network resource and the data link. 20) A method of setting and releasing a communication channel in a digital subscriber line call origination process, characterized in that the step (121 to 126) of terminating the function. The method of claim 1, wherein the seventh step (127 to 141): The incoming processing unit 22 receives the subscriber subscriber release notification from the originating processing unit 20 to request the switch control unit 23 to switch off the incoming call to the network; 127 to 130 cutting the call path by releasing the switch between subscribers. After the steps 127 to 130, the incoming call processing unit 22 notifies the incoming caller request to cut the incoming call to the layer 2 processor 21, and if necessary, the switch control unit 23 connects the incoming call to provide the incoming caller with incoming calls. After the steps 131 and 132 of providing a call tone to the subscriber, and the steps 131 and 132 are performed, the call processor 22 receives the caller release notification through the layer 2 processor 21 and receives a call tone to the called subscriber. In the case of providing a message to the switch control unit 23 after the switch release request to the incoming processing unit 22 releases the channel and network resources, and the completion of the incoming subscriber release notification to the layer 2 processing unit 21 processing required by the subscriber And then terminating (133 to 141) the function of the incoming call processing unit (22).