KR960016649B1 - Public phone billing procedure processing method in the isdn switch - Google Patents

Abstract

(101 or 115) starting the call proceeding response and call cancellation by verifying the reception of the feature key activation information component; (201 or 209) proceeding the communication service by transmitting the response which sets the feature identification inactivation in case of a charging and a free phone service; and (301 or 309) proceeding the communication service and terminating after performing the call cancellation procedure when the call cancellation message is received.

Description

How to handle the public telephone billing procedure of the integrated telecommunication network at an electronic switch

1 is a schematic control structure diagram of an electronic switching system which is a distributed control system to which the present invention is applied.

2 through 4 are flow charts for the ISDN public telephone billing procedure in the electronic switchboard according to the present invention.

The present invention relates to a method for processing a public telephone billing procedure of an integrated telecommunication network in an electronic switching system used as a node of an integrated service digital network (ISDN).

At present, there are many kinds of networks such as telephone network, teletex network, data communication network and packet network. Each network is developed independently and supports only one type of service, and lacks compatibility between networks. In addition, each network is realized by individual protocol, speed standard, and line standard, and there are many difficulties in interworking between networks due to legal problems and limitations of analog technology. In order to solve the above problems, it is required to establish a communication base that is more economical, has superior quality, and has a wide range of communication with network compatibility. To this end, the concept of an integrated telecommunications network, which enables users to receive a wide range of services using a limited standardized multipurpose matching device, has emerged. To implement this concept, a global protocol for interworking between the network and subscribers has been defined. In Korea, the introduction of DSSI (Digital Subscriber Signaling System No. 1) and the development of new technologies have become inevitable in order to establish ISDN and provide various services to ISDN users. Since the electronic switchboard has the ISDN function, it is necessary to connect the payphone with the ISDN function. Unlike the existing in-band signaling method, the new billing system using the signaling channel is required. There was a need. ISDN payphone can have non-voice data communication function as well as existing voice call service function, and payphone charging method by in-band signaling method for non-voice data communication can cause data damage and malfunction of terminal. have. In addition, there is a problem in that the public telephone terminal in the network for the existing public telephone subscriber is impossible to check and there is no call rejection function in the network for the use of a general telephone rather than the actual public telephone terminal.

The present invention has been made in order to solve the above problems of the prior art, by implementing a billing function using a signal-only channel for the ISDN public telephone subscriber mounted in the electronic switchboard, It is an object of the present invention to provide a method for processing a public telephone billing procedure for an integrated telecommunication network in an electronic switching system that prevents damage and malfunction of a terminal and realizes a reliable exchange with accurate charging.

In order to achieve the above object, the present invention provides a first step of confirming reception of a function key activation information element through a message from an originating digital subscriber and initiating a call progress response and call release for the received call; A second step of receiving an incoming response report from the incoming control process, analyzing the charging type, and transmitting a response specifying the functional identification deactivation to the ISDN public telephone in the case of incoming and unpaid billing to proceed with the call service; And a third step of receiving the end of the call receiving timer during the call to operate the call receiving monitoring timer during the call, proceeding with the call service, and ending the call release procedure after receiving the call release message. do.

When establishing ISDN payphone subscribers at electronic switchboards used as nodes in an integrated telecommunication network, charging methods for these ISDN payphone subscribers should be added. Unlike the charging method for general public telephones, the signaling channel must be used for charging ISDN public telephones, otherwise data corruption and non-voice data service using ISDN public telephones can be caused. Implement billing function using signaling channel for ISDN payphone subscribers mounted on electronic switchboards to prevent data corruption and terminal malfunction caused by ISDN payphone use, as well as more accurate billing Allow to have an image of.

The present invention is to implement a method of applying the billing for the ISDN payphone subscriber using the D-channel signal channel when establishing an ISDN payphone subscriber to the electronic switch to be used as a node of the ISDN. The charging method for ISDN payphone users is based on the digital subscriber circuit call control (DCC), which is responsible for digital subscriber control of electronic switchboards. This is accomplished by implementing a procedure with Tier 3. The charge types of ISDN payphones are divided into outgoing charges, incoming charges, and uncharged charges. In case of outgoing charges, charges must be received through ISDN payphones. Requests an ISDN payphone from DCC. The feature key protocol is used for requesting activation and deactivation of billing and verification of ISDN payphones. The function identifier is currently assigned to "1", but the data can be changed through MMI (Man Machine Interface). Managed by base When the DCC controlling the originating digital subscriber receives a "call setup" request and determines that it is an ISDN payphone subscriber line through a subscriber line check, the function identifier for charging is accessed from the database. Verify that the ISDN payphone terminal is actually connected to and used by the ISDN payphone subscriber line using the content of the feature activation information element of the "call setup" or "information" message received from the calling party. Only the outgoing call requesting the function activation of "" is regarded as the outgoing call of the ISDN public telephone, and call setup is proceeded, and the call release starts when the function activation request is not received. Upon confirmation with the ISDN payphone terminal, the DCC receives the incoming charge type from the incoming call control process, and the initial charge receipt is charged to the ISDN payphone by specifying the activation of the function identifier "1" as the functional identification information element of the "response" message. Ask. By implementing ISDN payphone billing method using signaling channel in electronic switchboard, ISDN public phone subscriber establishment which was impossible without billing method and non-voice data transmission service of ISDN payphone which is difficult to apply billing by inband Charging is possible. In addition, the billing information transmission through the signaling channel can prevent the use of the general ISDN terminal without the billing function in the ISDN payphone subscriber line by using the correct billing and function key protocol for ISDN payphone users.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a schematic control structure diagram of an all-electronic exchanger which is a distributed control system to which the present invention is applied.

As shown in the figure, the electronic switching system to which the present invention is applied is composed of three bush steams: an access switching subsystem (ASS), an interconnection network subsystem (INS), and a central control subsystem (CCS). ASS is classified into ASS_S (Subscriber), ASS_T (Trunk), and ASS_7 (No.7 Signaling System) according to the function.In ASS_S, the call processing function for subscribers accommodated in the exchange is represented by an access switching processor (ASP). The interstitial trunk line call processing function was adopted by the ASP. In ASS_7, the No.7 signaling transfer part (MTP) and the signaling connection control park (SCCP) were used for ASS and SMHP (Signalling Message Handling). Processor). In INS, Number Translation Processor (NTP) and Interconnection Network Processor (INP) perform the number translation function, route control function, and space division switch control function, which are commonly required in each ASS, and CCS operates and preserves the system. The function is performed. Each subsystem is connected to the INS via LDL (Local Data Link) to form an inter-processor system network between processors. The ISDN payphone billing function of the electronic switchboard is implemented in the software block DCC (Digital Subscriber Circuit Call Control) mounted in the ASP belonging to the ASS_S line and trunk access subsystem (LTAS). ASC (Analog Subscriber Control), which receives the cycle, controls the analog subscriber of the electronic switchboard, TKC (Trunk Control) that controls the relay call of r2 / decadic signaling, and UPC (User, which controls the relay call of the telephone user part). Part Control) and the DCC that controls the local digital circuit subscriber.

2 through 4 are flowcharts of a billing procedure for an ISDN public telephone in an electronic switching system according to the present invention.

The ISDN public telephone billing function in an electronic switchgear system is implemented in a software block DCC that controls digital line subscribers. The block DCC is the main process responsible for process control and the originating or incoming control processes that control individual inbound and outbound signals. It consists of.

In the present invention, the ISDN payphone billing function is implemented in the procedure in which the telephone exchange is processed, and the ISDN payphone must be activated and deactivated the billing procedure through the function key protocol required by the switchboard. .

When the DCC receives a "call setup" request from the ISDN payphone subscriber in idle state (101,102), it checks the available B channel (103). When the channel selection is completed, the ISDN public telephone subscriber checks the digit transmission method, and in the case of the overlapping transmission method, responds with "call setup confirmation" (107) and transitions to the additional digit reception state (108). If there is no channel available and the B channel selection fails, the release procedure is performed (105). When receiving the "information" from the ISDN public telephone subscriber in the additional digit reception state confirms the completion of digit reception (109,110), and if the digit reception completion time is maintained (111). When it is determined that the reception of the digit from the ISDN payphone subscriber has been completed, a "call setup" or "information" message received from the ISDN payphone subscriber is received to verify that the ISDN payphone is actually connected and used on the ISDN payphone subscriber line. The analysis verifies whether the activation request of the function activation identifier "1" has been received. This function activation identifier " 1 " is treated as a database of supplementary service codes so that they can be changed by the operator of the switchboard. If the ISDN payphone subscriber does not request to activate the function of "1", it determines that the ISDN payphone is not connected and performs the call release procedure (112,113). If the activation request is received, the ISDN message is sent. The subscriber returns to the payphone subscriber and transitions to the call waiting state (114, 115).

When receiving a "caller response notification" signal from the incoming call control process in the incoming call waiting state (201, 202), the incoming billing type is analyzed to determine whether to request the activation or deactivation of charging by the ISDN public telephone (203). . If the incoming billing type is unpaid or unpaid billing, a "response" specifying the deactivation of the function activation identifier "1" is transmitted to the ISDN public telephone to proceed with the call service without performing billing (204, 208, 209). If the incoming billing type is outgoing billing, it sends a "response" specifying the activation of the function identifier "1" to the ISDN public telephone to receive the initial billing, and receives a billing cycle from the billing control software block. The medium billing timer is driven to transition to a busy state (205 to 209).

If the end of the billing timer occurs because the ISDN payphone subscriber is in a busy state, the "information" specifying the activation of the function identifier "1" is transmitted to the ISDN payphone so that the additional charge is received. Maintains a busy state after driving the heavy charging timer (301 to 306). If the ISDN public telephone subscriber receives an incoming call release notification from an end-of-call or incoming call control process while in a busy state, the running timer is canceled, the charging control software block is notified of the final charge, and a call release procedure is started. 307 to 309).

Therefore, in the present invention as described above, the electronic switchboard performs the charging processing procedure of the ISDN payphone subscriber by using the signaling channel, thereby enabling the establishment of the ISDN payphone subscriber, and also the charging channel activation information and the same channel to the call. It is possible to avoid the malfunction of the terminal and the loss of billing information that may occur due to use. In addition, it is possible to implement a method of performing a service only when an ISDN public telephone terminal is actually connected to an ISDN public telephone subscriber line using a function key protocol. Such terminal identification procedures may be provided to prevent the use of ISDN terminals other than ISDN public telephones on ISDN public telephone subscriber lines. In addition, the implementation of the ISDN public telephone billing procedure in electronic switchboards provides an implementation method that minimizes modification of existing call processing programs, thereby minimizing program change and development costs due to additional functions.

Claims (4)

A method for processing a public telephone billing procedure for a public telecommunication network applied to an electronic switching system, which is a distributed control system, comprising: receiving a call progress response to a received call signal by confirming reception of a function key activation information element through a message from an originating digital subscriber. First steps 101 to 115 for initiating decoupling; A second step (201 to 209) for receiving an incoming response notification from the incoming call control process, analyzing the charging type, and transmitting a response specifying the function identification deactivation to the ISDN public telephone in the case of incoming and unpaid billing to proceed with the call service; ; And a third step (301 to 309) of terminating the call receiving timer during the call to operate the call receiving monitoring timer after the call and proceeding with the call service, and ending the call release procedure after receiving the call release message. Comprehensive information communication network public telephone billing procedure processing method in an electronic switch. 2. The method of claim 1, wherein the first steps (101 to 115) comprise: a first step (101 to 103) of checking available B channels when receiving a "call setup" request from an ISDN public telephone subscriber in idle state; After performing the first process (101 to 103), if the channel selection is complete, the ISDN public telephone subscriber is divided into a digit transmission method, if the channel selection fails second step (104 to 106) after the call release procedure; A third step (107 to 110) of confirming completion of digit reception when receiving information from the subscriber in the additional digit reception state after confirming call setup after performing the second process (104 to 106) in the case of digit transmission; After performing the second process (104 to 106), if the digit transmission method is a batch transmission, if there is a function activation request, waiting for the incoming response after the call progress, if there is no request fourth process (112 to 115) ; And after performing the third process (107 to 110), if the digit reception is not completed, the additional digit reception state is maintained, and if there is a request for function activation, the incoming call waits after the progress of the call; A method for processing a public telephone telephone billing procedure in an integrated information communication network in an electronic switching system comprising a process (11 to 115). 2. The method of claim 1, wherein the second steps 201 to 209, when receiving a signal of the "subscriber response notification" from the incoming call control process in the incoming call waiting state, the first process (201 to 201) 203); After performing the first process 201 to 203, if the incoming charge type is unpaid or incoming charge, the call service is performed without transmitting the charge by transmitting a "response" which specifies the deactivation of the function activation identifier to the ISDN public telephone. Second processes 204, 208, and 209 to cause them; And after performing the first process (201 to 203), if the incoming billing type is outgoing billing to receive the initial billing by ISDN payphone, and receives the billing cycle and drives the billing timer during the call of billing cycle And a third process (205 to 209) for transitioning to a busy state. The method of claim 1, wherein the third step (301 to 309), if the end of the billing timer due to the ongoing call of the ISDN public telephone subscriber during the call, the additional charge is stored by the ISDN public telephone, and again during the call First steps 301 to 306 for maintaining a busy state after driving the reception timer; And upon receipt of an incoming call release notification from the ISDN payphone subscriber or the incoming call control process in a busy state, cancels the running timer, notifies the final charge to the billing control software block, and initiates the call release procedure. And a second process (307 to 309).