KR950003726B1 - Call fowarding service method - Google Patents

Abstract

The control method for servicing the triple channel connection has the step for translating the received call when the line is used for communication; step for sending the call transfer signal to the local requested subscriber who reponses to the call; step for sending the call transfer to the remote requested subscriber who responses to the call; step for sending the busy signal to the unrequested subscriber when the hook is refreshed by the requested subscriber; step for connecting the requested subscriber and the requesting subscriber; step for connecting the requested subscriber and the connected subscriber again when the requested subscriber does not response; step for transferring the call from one to another when the requested subscriber refreshes the hook.

Description

Transfer Service Method in Electronic Switching System

1 is a diagram showing the subsystem configuration required to perform an electronic switch system call transfer service.

2 is an overall flowchart of a call transfer service according to the present invention.

3 is a flowchart illustrating a localization process between a transfer subscriber and a destination subscriber according to the present invention.

4 is an outgoing call processing flow diagram between a call forwarding subscriber and a called party according to the present invention.

5 is a flowchart illustrating a transfer process after a call between a transfer subscriber and a called subscriber according to the present invention.

6 is a flow diagram of a transfer process by disconnecting a transfer subscriber during a called party call according to the present invention.

7 is a flowchart illustrating an incoming subscriber non-response process after disconnection of a transfer subscriber according to the present invention.

8 is a flowchart illustrating a transition process to a busy state according to the present invention.

* Explanation of symbols for main parts of the drawings

1: subscriber exchange subsystem (ASS)

2: Internal Network Subsystem (INS)

3: central control subsystem (CCS)

LTAS: subscriber and trunk matching subsystem

LSS: Subdivision Switch Control Subsystem

SSS: Signal transmission and reception subsystem

TCS: Call Processing Control Subsystem

OSS: Special Service Control Subsystem

NHS: Number Translation and Routing Processing Subsystem

SNS: Space switch and call switch resource management subsystem

CSS: Synchronizer and Spatial Switch Control Subsystem

MSS: Statistical Data Collection Management Subsystem

CAS: Billing Information Processing Subsystem

The present invention relates to a subscriber transfer service method provided by an electronic switch.

The transfer service is a subscriber who has been transferred by the operator and hangs a caller who is currently busy by a hook flash while the incoming call is in progress.The new call is made by dialing a special code and the destination number to be transferred. There is no limit to the number of times that a call can be transferred by the function of transferring a call by connecting with the original calling subscriber who has called and suspended the subscriber.

By the way, many private exchanges in Korea have been providing call transfer services, but little has been provided in domestic exchanges. However, with the rapidly developing electronic communication technology and development, as subscribers require various and convenient services, it is necessary to implement call transfer service among various special services in the national exchange.

Accordingly, an object of the present invention is to provide a call transfer service to provide a call transfer function according to subscriber requirements to satisfy various service needs of subscribers.

In order to achieve the above object, the present invention is applied to an electronic switching system having a subscriber switching subsystem, a network subsystem, and a central control subsystem, and is a call transfer service registered subscriber who is a call recipient in a bilateral call state. On request, the first step is to translate the called party's number requested; if the called party was a subscriber in its own country, occupy the called party, connect a switch for a call between the transferring party and the newly added called party, The second step is to notify the called party of the transfer service when the subscriber responds, and the transfer subscriber and the called party to be in a busy state by their home call. To switch between the call and the new incoming subscriber In the third step, when the called party responds, the called party is notified of the transfer service, and the called party and the called party are previously transferred by disconnection such as hook flash or hook on of the called party. The fourth step of disconnecting the occupied switch and connecting the call path between the original calling party and the called party and the called party in the busy subscriber's call state to make the busy state due to the transfer service. Step 5, disconnecting the switch previously occupied by the transfer subscriber disconnection in the waiting for answer state and connecting the call path between the calling party and the called party so that the call is in the busy state due to the transfer service. Disconnect the previously occupied switch by disconnecting the transfer subscriber while waiting for Step 6, a call is made to reconnect between the original calling party and the transfer subscriber when the called party does not answer while connecting the call path between the calling party and the called party and waiting for the called party to answer. During the switching service processing, it comprises seven steps of performing the transition control to the bilateral call state due to the disconnection of the original calling party or the called party which is the non-controlling side, the disconnection of the calling party, the called party calling entity, etc. It is done.

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

1 is a schematic diagram of subsystems of an electronic switchboard for a call transfer function, in which 1 represents a subscriber switching subsystem (ASS), 2 represents a network subsystem, and 3 represents a central control subsystem (CCS).

As shown in the figure, an electronic switch, which is hardware to which the present invention is applied, includes a subsystem (LTAS) that controls matching of subscribers and trunk lines, a subsystem (LSS) that controls time-sharing switches, and transmits and receives R2 MFC and DTMF signals. A subscriber switching subsystem (ASS) comprising a subsystem (SSS) for generating various tones, a subsystem (TCS) for controlling general call processing, and a subsystem (OSS) for controlling various special services; Subsystems (NHS) that handle number translation and routing, subsystems that manage space switches and announcements resources, and call switch resources, and subsystems that control network and spatial switches; Network subsystem 2 (INS); A central control subsystem 3 (CCS) including a subsystem (MSS) for collecting and managing various statistical data and a subsystem (CAS) for processing charging information.

2 is an overall process flow diagram of the present invention.

When the called party registered in the transfer service in the state of bilateral call makes a hook flash and suspends the original calling subscriber and requests the transfer service (2-1), the called party number to be transferred is extracted (2-2). The subscriber service number translation is requested (2-3) and the station band result is awaited.

Upon receiving the home call notification (2-4), the call is queued for translation, and the home call is handled between the call forwarding subscriber and the newly added called party by the home call (2-5). When received (2-6), the incoming call is occupied by the outgoing line and the outgoing call is handled between the incoming call transfer subscriber and the newly added incoming subscriber (2-7). (2-8) When the transfer subscriber and the called party make a call, the transfer process is performed after the call (2-9), and when the transfer subscriber disconnects while waiting for the called party to answer (2-10) ), The transfer subscriber transfer process is performed during the call of the called party to call the calling party and the called party (2-11).

3 is a flowchart of a local call processing (2-5 in FIG. 2) between a call forwarding subscriber and a destination subscriber of his own country according to the present invention.

When the incoming subscriber occupancy notification is received in the called party translation waiting state (3-1), the switch connection between the call forwarding subscriber and the newly added called party is requested (3-2), and the local call switch is waiting for connection.

Receive a switch connection notification (3-3), send a ringing tone to the transfer subscriber, send a call signal to the called party, and when the called party answers (3-4), the called party sends a special call to the basic call processing process. Require subscriber service to transition to the processing process (3-5), and when notified of the subscriber service (3-6), notify the transfer service by notifying the transfer party of the transfer service (3-7) and initial billing Information is informed (3-8) and the called party is called.

If the transfer subscriber is disconnected (3-9) while making a call waiting for the incoming subscriber to respond (3-9), the call is cut off (3-10) and the caller is disconnected from the calling party and the calling party. Requiring a connection to a call for transfer service between subscribers (3-11) and notifying the subscriber's process extinction to the outermost process of the subscriber to which the transfer subscriber belongs (3-12) to enable a new call attempt, Perform transfer service due to transfer of disconnected subscriber during subscriber call (3-13).

If the transfer subscriber is disconnected while the called party is waiting for translation (3-14), when the calling signal is connected and answered by the transfer subscriber, the transfer to control of the basic call is requested (3-15). (3-16), even if the transfer subscriber is disconnected while waiting for local call switch connection (3-17), the switch is transferred (3-18), and after the called party disconnect request is requested (3-19). The call signal is connected to the transfer subscriber, and when the answer is made, the transition to the bilateral call state is performed.

4 is a flowchart of outgoing call processing (2-7 in FIG. 2) between a call forwarding subscriber and a destination subscriber of another country according to the present invention.

When the outgoing line occupancy notification is received while the outgoing line is occupied (4-1), the switch connection between the call forwarding subscriber and the newly added incoming subscriber is requested (4-2), and the outgoing call switch is on standby. .

Upon receiving the switch connection notification (4-3), waiting for the incoming state, and receiving notification of the incoming state (4-4), the transfer subscriber hears a ring tone and the incoming party answers (4-5). In order to transition to a special call processing process, the subscriber service request (4-6) and the notification of the subscriber service (4-7), the call transfer service notification to inform the control party (4-8), The initial billing information is notified (4-9) and the transfer subscriber and the called party are in a busy state by outgoing call.

If the transfer subscriber disconnects (4-10) while waiting for the called party to answer, it requests a switch truncation (4-11), disconnects the call path between the previous calling party and the transferring subscriber, and calls the incoming subscriber. Requesting a call in a call for transfer service between subscribers (4-12), and notifying the subscriber process extinction to the subscriber processing outermost process to which the transfer subscriber belongs (4-13) to enable new call attempts and incoming calls Perform transfer service due to transfer of disconnected subscriber during subscriber call (4-14).

If the transfer subscriber is disconnected while waiting for outgoing line occupancy (4-15), if the call signal is connected to the transfer subscriber again and responded, the transition to the bilateral call state is performed. If the transfer subscriber is disconnected (4-16) or if the transfer subscriber is disconnected while waiting for incoming call (4-18) -18) Transfer control to the base call (4-19) and perform a transition to the bilateral busy state (4-20).

5 is a flowchart illustrating a transfer process (2-9 in FIG. 2) after a call between a transfer subscriber and a called subscriber according to the present invention.

If the transfer subscriber is disconnected (5-1) while in the call with the transfer subscriber (5-1), a switch disconnect request (5-2) is made to disconnect the call path between the previous calling party and the transfer subscriber and The transfer request between the called subscribers is requested (5-3) and the subscriber process is notified to the outermost process of the subscriber to which the transferred subscriber belongs (5-4). Allows you to wait for the transfer switch to connect while in a call.

When the transfer switch is notified of the connection (5-5), the destination is notified of the transfer switch connection (5-6), and the call is connected by the calling party and the called party to the busy state due to the transfer service. If the calling party disconnects (5-7), it notifies the final charge (5-8), requests for disconnection of the called party (5-9), and the transfer service ends. When the called party with the call service function in the transfer call state, the user flashes the hook and requests the transfer service again (5-10) and notifies the subscriber service (5-11). Becomes At this time, if the calling subscriber disconnects (5-12), the final charge is notified (5-13), the called subscriber is disconnected (5-14), and the transfer service is terminated.

6 is a flowchart of call transfer processing (2-11) by disconnection of a transfer subscriber during a call of a called party according to the present invention.

When the call transfer switch is notified (6-1), the called party is notified of the transfer switch connection (6-2), and the calling party hears a ring tone and sends a call signal to the called party to wait for the called party to respond. When the called party responds (6-3), it requests subscriber service to transition the called party from the basic call processing process to the special call processing process (6-4) and when notified that it is the subscriber service (6-5). (6-6) and after passing the initial billing information (6-7), the call is transferred to the transfer service.

At this time, if the calling party is disconnected (6-8), the final charge is notified (6-9), the called party is disconnected (6-10), and the call transfer service is terminated. In addition, if a time-out (30 seconds) occurs because the incoming subscriber does not answer while waiting for a transfer response (6-11), it requests the disconnection of the called subscriber (6-12) and calls for re-call of the transferred subscriber. A call forwarding request is made (6-13), and a called party no answer is handled after disconnection of the called party for re-call between the calling party and the calling party (6-14).

7 is a flowchart of a call processing (FIG. 6-14) of calling the transfer subscriber again when the transfer subscriber is disconnected during the call of the called party according to the present invention and the incoming subscriber does not answer for a certain time.

When notified of the transfer subscriber's incoming call (7-1), it requests a connection between the calling subscriber and the transfer subscriber (7-2), and upon receiving a switch connection notification (7-3), a call signal to the transfer subscriber. Send (7-4) to wait for a response. When the transfer subscriber answers (7-5), it disconnects the call signal (7-6) and requests subscriber service to transition the calling party from the special call processing process to the basic call processing process (7-7). Transition to state is performed (7-8).

8 is a flowchart of the transition processing (7-8 in FIG. 7) to the quantum call state according to the present invention.

If notified of the transfer to the primary call (8-1), it checks for cascading (8-2) and, in the case of cascading, uses the process inheritance function to make the previous busy state configured with special call processing processes. Request transfer of subscriber service control (8-3), and control transfer to basic call using process succession function to be in a duplex busy state consisting of basic call processing processes if not cascading (8-4) .

As described above, the present invention is applied to a large-capacity electronic switchboard and transfers a call transfer function to transfer a call by connecting a calling party that has been placed on hold by calling a new incoming subscriber in a state of an incoming call. Implemented.

In addition, the transfer service is cascaded indefinitely as the call progresses, and the call charge must be connected between the first calling party and the last calling party, and the incoming call switching service can be driven in any combination in the process of calling a new call. In connection processing, the information of the called party is transferred to the calling party to be controlled by the calling party.

In addition, since the transfer service should be regarded as a new call, billing and statistics processing should be performed. Therefore, in the concurrent programming, the transfer process simultaneously performs outgoing and incoming processing, and the process is created when the service is executed and is destroyed when the call ends. Chose.

Accordingly, the present invention performed by the above processing procedure satisfies various convenient service requirements of subscribers, and unlike some other exchangers in which this function is implemented, it is possible to use two software algorithms without using a conference call device. The service can be provided by using a general call path, so that the service can be performed without increasing the capacity of the conference call device that is the system equipment.

Claims (6)

Subsystem (LTAS) to control subscriber and relay line matching, Subsystem (LSS) to control time-sharing switches, Subsystem (SSS) to transmit and receive R2 MFC and DTMF signals and various tones, and to control general call processing A subscriber exchange subsystem (ASS) comprising a subsystem (TCS) and a subsystem (OSS) for controlling various special services; Includes subsystems (NHS) that handle number translation and routing, subsystems that manage space switches and announcement resources, and conference switch power, subsystems that control network and spatial switches (CSS) Network subsystem 2 (INS); It is applied to an electronic switchboard having a central control subsystem (CCS) including a subsystem (MSS) for collecting and managing various statistical data and a subsystem (CAS) for processing billing information to perform call transfer service. In the method, the first step (2-1 to 2-3) to perform the translation of the number of the called party to be transferred when the called party requests the transfer service during the call, and the first step (2-1 to) 2-3) After the execution, if the called subscriber is a subscriber of his country, if the receiving subscriber occupancy notification is received, the call is transferred to the called party when the called subscriber answers under the switch connection processing for the call between the transfer subscriber and the newly added called subscriber. After performing the second step (3-1 to 3-19) and the first step (2-1 to 2-3) to notify the service and to transfer the called party and the called party to the busy state by the local call. , Caller If the subscriber is a member of another country, when receiving the outgoing line occupancy notification, the switch handles the call for the call between the transfer subscriber and the newly-added incoming subscriber.If the called party answers, the called party is notified of the transfer service. The subscriber has a third step (4-1 to 4-20), the second step (3-1 to 3-19), and the third step (4-1 to) to be in a busy state by the outgoing call. 4-20) After executing, disconnect the previously occupied switch by cutting the hook flash or hook on of the transferring subscriber in the busy state of the transferring subscriber and the receiving subscriber, and transfer the transfer service between the calling subscriber and the receiving subscriber. The fourth step (5-1 to 5-14), the second step (3-1 to 4-19) and the third step (4) to connect the call path for the call to the busy state due to the transfer service; -1 to 4-20), after receiving If the called party responds while waiting for the called party to answer the call by disconnecting the switch previously occupied by the transfer subscriber disconnection in the waiting state for answering the call and connecting the call path for the transfer service between the calling party and the called party. A fifth step (6-1 to 6-14) of connecting a call between the original calling party and the transferred called party, and then performing a truncation process when the calling party is disconnected; and the fifth step (6- 1 to 6-14) When the called party disconnects during the called party call and the called party does not answer for a certain time, it connects the calling signal to the called party again. After performing the sixth step (7-1 to 7-8) and the sixth step (7-1 to 7-8) to make a call with the calling subscriber of Performed by the seventh step (8-1 to 8-4) to perform the transition control to the bilateral call state due to the disconnection of the calling party or the called party, the disconnection of the transfer subscriber, the failure of a new called party, etc. Call transfer service control method in an electronic switch, characterized in that 2. The method of claim 1, wherein the second step (3-1 to 3-19), if the subscriber of the home country as a result of translating the number of the called party requested for the transfer service, and investigates whether the called party is maintained; (3-1 to 3-8) after connecting the switch, connecting a ringing signal to the called party and a ringing tone to the transfer subscriber, and when the called party answers, connecting a call between the two subscribers (3-1 to 3-8); If the transfer subscriber is disconnected before occupying the called subscriber, connecting the call back with the original calling subscriber (3-4 to 3-16), and the transfer subscriber is disconnected before occupying the called subscriber but calling the called subscriber. Step (3-17 to 3-19) to connect the call back to the original calling party and the calling party is disconnected when the called party disconnects while calling the called party. Call transfer service method in the electronic switch, characterized in that performed by the step (3-9 to 3-13) to connect the call. The third step (4-1 to 4-20), if the subscriber of the other country as a result of translating the number of the called party for the transfer service is occupied by the routing process occupying the available outgoing line If the receiving subscriber is idle and receives the receiving information from the receiving station, the receiver connects to the call and waits for the incoming response.If the receiving subscriber answers, the call between the two subscribers is made. Connecting (4-1 4-19), and if the transfer subscriber disconnects before occupying the outgoing line, connecting the call back with the original calling subscriber (4-15), and occupying the outgoing line, If the transfer subscriber disconnects before calling the called party, connecting the call back with the original calling party (4-16 to 4-21), and while calling the called party in another country Transfer the subscriber when the step of connecting the call between the original calling subscriber and the called subscriber (4-10 to 4-14) of a call transfer service way around the electronic switch, characterized in that is carried out by cutting. 4. The method of claim 1, wherein the fourth steps (5-1 to 5-14) are performed between the original calling party and the called party who were listening to a pending sound when the transferring subscriber and the called party disconnected during the call. (5-1 to 5-6) for making a call by connecting a switch, and performing a billing process and various cutting processes when the original calling party and the called party make a cut during the call (5-7 to 5-6). 9) when the called party and the called party register the transfer service during the call, when the called party requests the transfer service again, the transfer cascading process is performed again (5-10 to 5-14). Transfer service method in an electronic switch, characterized in that performed by 5. The method of claim 1, wherein the fifth step (6-1 to 6-14), if the transfer subscriber disconnects during the called party call, connects the switch between the original calling party and the called party, and the called party responds. (6-8 to 6-10), and if the original calling party and the called party are disconnected during the call, billing and various cutting processes (6-8 to 6). -10) and the transfer subscriber disconnects during the call of the called party, and connects the switch between the original calling party and the called party and disconnects the called party when the called party does not answer while waiting for a certain time. Transfer service method in an electronic switch, characterized in that carried out by steps (6-11 to 6-14) 6. The method of claim 1, wherein the sixth step (7-1 to 7-8), if notified of the transfer of the transfer of the transfer subscriber to request the connection between the calling subscriber and the transfer subscriber, and receives a switch connection notification (7-1 to 7-4) waiting for a call signal to be transferred to the transfer subscriber (7-1 to 7-4), and when the transfer subscriber responds, the call signal is disconnected, the subscriber service is requested, and the transition to the bilateral call state is performed. Call transfer service method in an electronic switch, characterized in that performed by the step (7-5 to 7-8).