KR930010949B1 - Cutting-in method during a call - Google Patents

Abstract

An intercept control method for 3 way communication of two subscribers and an operator comprises the following steps of: (1) taking over control sequences from the repeating control processor to the interceptor processor; (2) connecting call-mixer to each subscriber and informing two subscribers of intercepting tone; (3) keeping two subscribers communicating while the intercept process is being tried; (4) keeping two subscribers communicating when the slave subscriber line is disconnected after connecting call-mixer, and keeping intercept process.

Description

Interception Control Method of Electronic Switching System

1 is a schematic configuration diagram of hardware on which the present invention is to be mounted.

2 is a process diagram by type of interrogation call and intercept line.

3 is a complete flow diagram of interception control.

4 is a diagram of control transfer of intercepting control of a call to an intercepting processor.

5 is a flowchart for analyzing the class of intercept lines and assigning a call mixer.

Figure 6 is a flow chart showing the processing of the interception retry.

* Explanation of symbols for the main parts of the drawings

1: ASS-S (Access Switching Subsystem Subseriber)

2: ASS-T (Access Switching Subsystem Trunk)

3: ASS-S / T (Access Switching Subsystem Subscriber / Trunk)

4: INS (Interconnection Network Subsystem)

5: Central Control Subsystem (CCS)

The present invention relates to an interception establishment method of an electronic switching system.

The interception function, where a passive dash operator intervenes between two subscribers to notify a subscriber who is already in a call, indicates that a long distance or international call has been made. The saturation function is also made available on the subscriber line, requiring proper response to the development trend of the exchange.

The present invention is a three-way call between a passive dash operator and a busy subscriber by receiving control from a subscriber control process or a relay line control process that is mounted in an access switching processor (ASP) of an electronic switchboard and controls two subscribers in a call. Its purpose is to provide an interception control method for controlling to be made.

In order to achieve the above object, the present invention provides an Access Switching Subsystem (ASS) to perform a distributed call processing function with an ASP which is a subscriber switching processor, and an INS (Interconnection) connected to the ASS to perform a centralized call processing function part. Network Subsystem) and CCS (Central Control Subsystem) which is connected to the INS (4) and is responsible for centralizing operation and preservation, are applied to the ASP of the electronic switchboard which controls the two subscribers in the call. An interception control method for transferring a control from a subscriber control process or a trunk line control process to control a three-way call between a passive dash operator and a subscriber in a call; The first process of transferring the control of two subscribers in a call and taking control from the process of controlling the call of the passive dash operator, and after receiving all the control, disconnects the existing switch of the subscriber of the call and switches the call mixer. After the connection, the second process of promptly ringing and intercepting to the passive dash operator and subscriber, respectively, and establishing a three-way call, and the transferred control state when the passive dash operator abandoned the call midway or failed. A third process of controlling interception retry attempts while maintaining a normal busy state, and a fourth process of controlling interception retry attempts of a passive dash operator by maintaining a two-way busy state when the slave subscriber is disconnected after the call mixer is connected. Process.

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

As shown in FIG. 1, the electronic exchanger to which the present invention is applied is divided into three types: ASS (Access Switching Subsystem) 1, 2, 3 (INS), Interconnection Network Subsystem (INS) (4), and Central Control Subsystem (CCS) (5). It has a subsystem.

ASS (1, 2, 3) performs a distributed call processing function, INS (4) performs a centralized call processing function part, CCS (5) is responsible for the centralization of operation and maintenance. When a call request occurs from subscriber and relay line, ASS (1,2,3) detects this, performs call service and requests number translation from INS (4). After translating the number, the called party's ASS (1,2,3) performs the call service related to the called party, and the INS (4) sets up the outgoing and incoming call paths through the search and connection of the call. When the call is completed, the originating and terminating ASS (1, 2, 3) restores the call data to the idle state and the originating ASS (1, 2, 3) notifies the CCS (5) billing data. Faults occurring in the ASS (1, 2, 3) or INS (4) are notified to the CCS (5), where the system-level Maintenance and Administration (M & A) functions are performed to determine the associated ASS (1, 2, 3) or Send the command to the INS 4. It also notifies the operator of status information through MMC (Man Machine Communication). Various input texts inputted from the operator are translated by the CCS (5), and sends M & A related commands to the corresponding ASS (1, 2, 3) or the INS (4). ASS can be classified into ASS-S (Access Switching Subsystem Subseriber) (1), ASS-T (Access Switching Subsystem Trunk) (2), ASS-S / T (Access Switching Subsystem subscriber / trunk) (3), etc. The present invention controls a call by being mounted in an access switching processor (ASP), which is an ASS (1, 2, 3) subscriber exchange processor in which a subscriber is mounted.

The ASIP (Analog Subscriber Interface Processor) connected to the ASP directly controls the subscriber line, the LSP (Local Service Processor) controls various signaling equipment, and the TSP (Time Swich Processor) controls the time switch. In addition, the TIP (Trunk Interface Processor) configured in the ASS-T (2) and the ASS-S / T) 3 performs a relay line matching function to control the relay line.

The configuration of the interception control process and the general call processing control process mounted in the ASP is shown in FIG.

2 is a process configuration diagram for each call type and intercept line in a call, in which a represents a subscriber control process, T represents an interception control processor, and t represents a relay call control process.

The process structure of interception can be largely divided into three types. Figure 2-1 shows the case where an internal call is being called and an attempt is made to intercept with a subscriber line. In the two cases above, the intercept line is the incoming line. Figures 2-1 and 2-2 are the same in terms of the process of controlling interception, so they can be divided into two cases: the interception line is a subscriber line and a relay line.

3 shows an overall flow diagram of an interception control in accordance with the present invention.

The first step is to check the calling party grade and the status of the called subscriber (1) to transfer control (2) and to check the success before control (3) and to analyze the type of intercepting line in case of success (4). In the case of the relay line, incoming signaling 5 is performed.

In the second process, if the call mixer is connected and change control to the call (6) is successful, the existing switch is cut and the tone is connected. After 1 second, the tone is cut (8) and the time switch is connected. It becomes the state 9 in the middle.

In the third and fourth processes, when the change control to the call fails (7) or the control transfer fails (3) when the call mixer is assigned to the subscriber who was on the call, the call mixer is in the two-way call (11) state. Before the allocation, the intercepting state becomes a state during a general call (14). In such situations (11) and (4), the manual dash operator may retry the interception (12, 15), and in each case the truncation process (10, 13) is assigned to the case where the call mixer is assigned. If not, it is handled differently.

Referring to the detailed flow of each process divided in FIG. 3 with reference to FIG. 4 below, FIG. 4 shows the procedure of the first process of transferring the start and control of interception.

When the passive dash operator attempts to intercept a busy subscriber, the subscriber control process (B) in the ASP receives the incoming subscriber occupancy request message from the number translation process (N) (100) to check the calling party class and to check the busy subscriber. After checking the status of the subscriber sends an interception initial occupancy report message to the interception control process (T) (100). The interception control process T sends an interception preparation request message to the busy subscriber control process A (102), and the subscriber control process A having received the message sends a control change report to the subscriber control process B. 103, the interception control process T receives the interception preparation report from the subscriber control process B (104). Then, the subscriber control process (C) on the passive dash operator side stocks the control change request message (105), upon receiving the change report message (106), the control intercepts from the general call control process (T). It is passed completely to (process 1).

The previous control step described above shows the case where the master subscriber B who is requested to intercept is in an internal call (2-1), and the master subscriber B is in an outgoing call or in an incoming call. In the case of -2) state, as shown in FIG. 3, subscriber control process A is changed to relay call control process A (FIG. 3).

5 shows a second process of analyzing the class of intercept lines and assigning a call mixer to transition to a three-way call.

The interception control process T checks the receiver 101 and the call type for the initial occupancy report message in FIG. 4 and knows the type of the intercepting line. In this case, if the intercepting line is a relay line, the incoming signaling 115 is performed. ) In the interception control process (T).

When all control is transferred to the interception control process (T), the call mixer control processor sends the call mixer assignment request message 107 of the two subscribers on the call and receives the assignment response message 108 and then the call mixer of the passive dash operator. Sends an allocation request message 109 and receives an allocation response message 110.

When the call mixer assignment is complete, it sends a switch channel change information message 111 to the local service control process, immediately associates the ring tone 112 with the master subscriber B and the passive dash operator 112, and intercepts the slave subscriber A 113. Connect and notify that an interception was attempted. Immediately after one second, the call tone and intercept tone are cut off and the time switch between the two subscribers in the call is connected.

During the transfer of control to the interception process (T), before the call mixer is assigned to the two subscribers, a passive control operator or relay line control process gives up interception or controls the passive dash operator. If the control change report message (FIG. 4, 106) does not arrive, the control of the two subscribers in the call is in an intercepting general call state where the interception control process (T) remains intact and performs the call and general cutting ( Process 3).

Interception The third process above attempts to intercept the master subscriber B, who first requested the interception in the state of a general call, is shown in FIG.

Receives the interception report 114 and sends a control change request message 105 to the subscriber control process or relay line control process of the passive dash operator and receives the change report message 106 to control the subscriber controlling the call of the passive dash operator. Control is transferred from the process or trunk line control processor.

When control is transferred, the three-way call is established in the same order as in the second process (Figure 3). At this time, if the interception fails (117), the interception control processor is in the state of interception 118 again.

Referring to the fourth process of FIG. 3, after the call mixer is assigned to the two subscribers in the process of transferring control to the interception process, the call mixer which the manual dash operator gives up intercepting halfway or controls the manual dash operator is controlled. The three-way call cannot be made due to the connection failure of the two subscribers. The existing call is intercepted by the call mixer. The cleavage treatment at this time takes place immediately after any one subscriber cleavage.

The interception of the interception retry process at this time is shown in FIG. 6, which shows the third process. In the intervening two-way call, the manual dash operator attempts to intercept the master subscriber B who first requested the interception. The interception control process then receives an interception report from subscriber control process B in a special call busy state and sends a control change request message 105 to the subscriber control process or relay line control process of the passive dash operator and the change report message 106. Control is transferred from the subscriber control process or the trunk line control process controlling the call of the passive dash operator. At this time, since the call mixer is already assigned to the two subscribers in the call, only the call mixer of the passive dash operator is assigned 108 to establish a three-way call after the intercept sound 112 and the instantaneous call sound transmission 113.

6 is a flowchart illustrating a process of intercept retry, and the interception control process that receives the interception retry interception report message 114 includes a subscriber control process that transmits an interception report message and a current master process B. Checks 115 and 116 for the same process, otherwise, intercept failure messages are sent to the subscriber control process that sent the interception report message and the intercepted two-way busy state 118 remains intact (Figure 6).

Looking at the cut-off procedure, the cut-off process in the interception state (process 3) is performed using the data transferred during the control transfer in the same way as before the control is transferred. In 4), any one subscriber recovery is performed immediately. When the subscriber is requested to intercept in the three-way busy state, the processing occurs immediately when the master subscriber B recovers, and the intercepted two-way busy state (process 4) is maintained when the manual dash operator or the slave subscriber is disconnected during the three-way call. do.

Therefore, the present invention performed according to the processing procedure as described above has the effect of performing a three-way call between the passive dash operator and the subscriber in the call.

Claims (3)

Access Switching Subsystem (1, 2, 3) to perform distributed call processing with an ASP, which is a subscriber exchange processor, and centralized call processing function connected to the ASS (1, 2, 3). It is applied to the ASP of the electronic switchboard having an INS (Interconnection Network Subsystem) 4 and the Central Control Subsystem (CCS) 5 connected to the INS (4) and responsible for the centralization of operation and preservation. An interception control method for controlling a three-way call between a passive dash operator and a busy subscriber by taking control from a subscriber control process or a trunk line control process controlling two subscribers in a call; The first process of transferring the control of two subscribers in a call and taking control from the process of controlling the call of the passive dash operator, and after receiving all the control, disconnects the existing switch of the subscriber of the call and switches the call mixer. After the connection, the second process of promptly ringing and intercepting to the passive dash operator and subscriber, respectively, and establishing a three-way call, and the transferred control state when the passive dash operator abandoned the call midway or failed. A third process of controlling interception retry attempts while maintaining a normal busy state, and a fourth process of controlling interception retry attempts of a passive dash operator by maintaining a two-way busy state when the slave subscriber is disconnected after the call mixer is connected. Interception control method characterized in that performed by having a process. 2. The first subscriber control process (B) according to claim 1, wherein the first subscriber control process (B) receives an incoming subscriber occupancy request message (100) from the number translation process (N) when the passive dash operator attempts to intercept a busy subscriber. Receiving, checking the calling party class and checking the status of the busy subscriber B and sending the interception initial occupancy report message 101 to the intercepting main process (T), and the intercepting main process (T) The interception child process C is generated to send an intercept preparation request message 102 to the second subscriber control process A in a call, and the second subscriber control process A having received the message receives the control change report 103. ) Is sent to the first subscriber control process (B), and the interception main process (T) receives the interception preparation report (104) from the first subscriber control process (B), and the subscription to the passive dash operator side. Intercept control, characterized in that it comprises the step of sending a control change request message 105 to the self control process, receiving the change report message 106, and then completely passing the call control to the child process (C). Way. According to claim 1, wherein the second process, when the interception control process (T) receives the initial occupancy report message 101 checks the type of call to investigate the type of intercept line to intercept the relay line The step of performing the incoming call signaling 115 in the interception control process (T), and if the control is transferred to the interception control process (T), call mixer allocation request messages of the two subscribers in the call mixer control process ( Sending a call mixer assignment request message 109 and receiving an assignment response message 110 of the passive dash operator after receiving the assignment response message 108 and, when the call mixer assignment is complete, a local service control process. Send a switch channel change information message (111) to the subscriber subscriber B and the passive dash operator immediately to the ringing tone (112) and to the slave subscriber A to intercept sound (113) And a step of notifying that the interception was attempted, and disconnecting the ringing tone and intercepting sound after 1 second and connecting a time switch between two subscribers who were in a call to establish a three-way call with a passive dash operator. Interception control method characterized in that.