KR950012587B1 - Electronics exchanger - Google Patents

Abstract

a subscriber switch connection sub-system having a LTAS for controlling a match of the subscriber with an arbitration line, a LSS for controlling a time division switch, a SSS for transmitting and receiving R2 multi frequency code and a dual tone multiple frequency and generating a signal sound, a TCS for controlling a basic call process, and an OSS for processing a specific service call; an internal connection network sub-system having a NHS for performing a number translation and a routing process, a SNS for controlling a space switch, conference call unit, and a various of recoding information unit, and a CSS for controlling a network synchronization and the space switch; and a central control sub-system having a MSS for collecting statistic data and a CAS. The method comprises the steps of, when the subscriber who subscribes a camp-on busy service is making a phone call, if the third subscriber calls the subscriber who is making a phone call, checking whether the number of the call subscriber is busy or not; if it is not busy, performing a normal reception, but if it is busy, checking whether the camp-on busy service is registered or not; if the service is not registered, performing a cut process; if it is registered, performing the camp-on busy service; and in case that the subscriber who is listening a camp-on busy sound demands the camp-on busy service, generating the busy tone.

Description

Call Waiting Service Method in Electronic Switching System

1 is a schematic diagram of a subsystem of an electronic exchanger to which the present invention is applied;

2 is a flowchart illustrating a method for waiting on call service according to the present invention.

3 is a flowchart of call waiting service incoming call processing according to the present invention.

4 is a call waiting processing flowchart according to the present invention.

* Explanation of symbols for main parts of the drawings

ASS: Subscriber Exchange Subsystem

LSS: Time Division Switch Control Subsystem

LTAS: Subscriber and trunk line matching subsystem

SSS; Signal Transmit and Beep Generation Subsystem

TCS: Call Processing Control Subsystem

OSS: Special Service Control Subsystem

INS: Internal Network Subsystem

NHS: Number Translation and Routing Processing Subsystem

SNS: Space switch and call switch resource management subsystem

CSS: Synchronizer and Spatial Switch Control Subsystem

CCS: central control subsystem

MSS: Statistical Data Collection Management Subsystem

CAS: Billing Information Processing Subsystem

The present invention relates to a call waiting service method among subscriber special services provided in an electronic switchboard. While a call waiting service function is provided in a conventional exchange, in the present invention, when a call waiting service is required without using a conference call device, a new call path is secured in addition to an existing call path and two general call paths are controlled. Therefore, the capacity of the conference call device should be increased or the conference call device may not be used to prevent service. When the subscriber registered by the telephone company operator is making a call by incoming or outgoing call, the service listens to the waiting tone to notify the caller when the third party calls. He or she will wait for you to talk to the calling third party. Then, if the hook flash again, the original state subscriber who is on hold can be called again, and then the call can be continued between the two subscribers by the hook flash. However, since this service is driven at the same time as a service such as an incoming call transfer, a missed call announcement, or a call rejection, there is a problem of mutual conflict.

Therefore, the present invention devised to solve the problems of the prior art, by setting the service priorities for each service and processing accordingly so that each service can be provided without difficulty, if necessary to cancel the call waiting function The purpose of the present invention is to provide a more convenient call waiting service such as registering a call and canceling call waiting and not providing a call waiting service for the call.

In order to achieve the above object, the present invention, LTAS for controlling the matching of the subscriber and the relay line, LSS for controlling the time division switch, R2 MFC (Multi Frequency Code) and DTMF (Dual Tone Multiple Frequency) signal transmission and generation of a tone A subscriber exchange access subsystem (ASS) including an SSS, a TCS for controlling basic call processing, and an OSS for controlling special service call processing; An internal network subsystem (INS) including NHS for number translation and routing processing, SNS for controlling space switches and conference call devices, and SNS for controlling various recording guidance devices, CSS for manipulators and space switches; A call waiting service method of an electronic switch having a central control subsystem (CCS) including a billing CAS and an MSS for collecting and managing long-term data, wherein the subscriber who has registered the call waiting service is calling. When a third party calls a busy subscriber, the TCS checks whether the called subscriber is busy, performs normal incoming processing when not on a call, and checks whether a waiting waiting service is registered when busy. If the busy waiting service is not registered, the first step of performing the truncation process; and if the busy waiting service is registered after performing the first step, call processing control is transferred to the OSS. The second step of performing the waiting service incoming call, and after performing the second step, did you hear the waiting sound during the call? If a hook flash to request the call waiting service of the self, characterized in that it comprises a third step of performing the processing of the call waiting service of the call.

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

1 is a structural diagram of an electronic switchboard required to perform a call waiting service function. In the drawing, ASS represents a subscriber exchange subsystem, INS represents an internal network subsystem, and CCS represents a central control subsystem.

The ASS subsystem includes a subsystem (LSS) for controlling time division switches, a subsystem (LTAS) for regulating subscriber and relay line matching, R2 MFC (Multi Frequency Code) and DTMF (Dual Tone Multiple Frequency) signal transmission and various tones. Generating subsystem (SSS), subsystem controlling general call processing (TCS) and subsystem controlling various special service call processing (OSS), and the INS subsystem handles number translation and routing. A subsystem (NHS), a space switch and a recording guidance device, and a subsystem for managing conference call devices (SNS), and a subsystem (CSS) for controlling a manipulator and a space switch. In addition, the CCS subsystem is a subsystem (MSS) that collects, analyzes and outputs various statistical data generated during the operation of the exchange and billing information for calculating the charge according to the call time, duration, distance for the call service provided to the subscriber It is provided with a subsystem (CAS) to generate and provide to the subscriber or recorded on the magnetic tape (MT) or disk (Disk). The subsystem OSS transfers call processing control from the subsystem TCS to control various processes for the busy service and requests the remaining subsystem to connect / disconnect the ring tone, connect / disconnect to the call, charge and statistics.

2 is a schematic flowchart of a method of waiting for busy service according to the present invention.

For convenience, the call waiting service registered subscriber is called the original counterpart subscriber who was talking to the A and A subscribers, and the third subscriber who called the A subscriber when the B and A subscribers and the B subscriber are talking.

If subscriber A who registered the call waiting service is calling subscriber B by originating or incoming call, and the third subscriber C calls subscriber A (2-1), NHS subsystem analyzes subscriber A's number and the TCS sub Request a call to the system. Investigate whether the subscriber is busy (2-2), if not in a call, perform normal incoming processing (2-3), and if it is already busy, examine whether the waiting call service is registered (2-4). If the busy waiting service is not registered (2-5).

If the call waiting service is registered, call processing control is transferred to the OSS subsystem to perform call waiting service reception (2-6). If a hook flash is requested (2-7), the call waiting service performs a call processing (2-8).

3 is a detailed flowchart of an incoming call processing (2-6 in FIG. 2) performed when a call waiting service request is received. If a subscriber A who has registered for call waiting service is calling a subscriber B while the calling party or the called party is called, and a third party C in his / her country or another country dials the subscriber A's number and requests an incoming call (3-1), The TCS subsystem checks whether the subscriber is blocked or cannot be called because the subscriber is blocked or in the middle of the incoming call (3-2). If the subscriber cannot be reached, the truncation process is performed (3-3).

If the subscriber is available for receiving, the subscriber checks whether the subscriber has registered services such as unconditional incoming call transfer, missed recording guidance, and call rejection recording guidance having higher priority than the waiting call service (3-4). Transfer the call processing control to the subsystem to process the service (3-5), if not registered, check if incoming party A is busy (3-6), and if it is idle, perform normal incoming processing (3- 7) If the call is from an originating or incoming call, it is checked whether the conditional call forwarding service is registered (3-8).

At this time, if the conditional call forwarding service is registered, the OSS subsystem handles the service (3-9), if not, checks whether the registered call waiting service is registered (3-10), and if not, is busy. (3-11), and if it is registered, it checks whether or not the call waiting cancellation service is started again (3-12). If it is started, it performs cut processing by busy (3-13). However, if not initiated, the OSS subsystem starts the call waiting service.

At this time, an incoming call processing in which the information of the called party A is notified to the calling party C is performed (3-14), and a switch between the subscriber A and the subscriber C is connected by the LSS, CSS, and SNS subsystems (3-15). For subscriber A, two switches are connected to subscriber B and subscriber C. When the switch is normally connected, the SSS subsystem connects a call tone to subscriber C (3-16) and a call waiting tone to subscriber A indicating that a call waiting request has been received (3-17).

Call waiting tone for 0.25 seconds, beep for 0.25 seconds, beep for 0.25 seconds, beep for 18.25 seconds, beep for 0.25 seconds, beep for 0.25 seconds, beep for 0.25 seconds Connect the channel for 13.25 seconds.

During this time, if subscriber A does not hook hook to receive the waiting waiting service and the waiting time passes (3-18), the SSS subsystem disconnects the ringing tone connected to subscriber C (3-19), and LSS , CSS and SNS subsystems break the switch between subscribers A and C (3-20). The OSS subsystem performs the truncation process for the subscriber C (3-21), transfers call control to the TCS subsystem while returning to the call state between the original subscribers A and B, and terminates the call waiting service. .

In addition, if the subscriber A who listened to the call waiting tone detects this by the hook flash requesting the call waiting service (3-22), and the LTAS subsystem is disconnected, the SSS subsystem disconnects the ringing tone connected to the subscriber C (3- 23), disconnects the waiting sound that was connecting to subscriber A (3-24), connects the call path between subscribers A and C in the LSS, CSS, and SNS subsystems (3-25), and makes a call with subscriber A. The SSS subsystem then connects the pending sound to the subscriber B (3-26). Thereafter, the busy waiting service busy process (3-27), which will be described later with reference to FIG. 4, is performed.

4 is a flowchart according to busy waiting service processing 2-8 at the request of busy waiting registered subscriber A. FIG.

If subscriber A and subscriber C are on the phone and subscriber A hooks (4-1) and detects it in the LTAS subsystem, the SSS subsystem connects subscriber C with a pending tone (4-2), and subscriber B The subscribers A and subscriber B make a call by cutting off the pending sound that was heard by the subscriber and connecting the call paths in the LSS, CSS and SNS subsystems (4-3).

In addition, if subscriber A and subscriber C are talking and subscriber A disconnects (4-4) and the LTAS subsystem detects it, the SSS subsystem connects subscriber C with a ringing tone (4-5). Cut the switch between the subscriber A and subscriber C in the LSS, CSS and SNS subsystems and charge the call in the CAS subsystem (4-6).

Since subscriber B is still waiting for a call, the LTAS subsystem connects a call signal to subscriber A (4-7), and when subscriber A answers (4-8), it hangs up the call signal (4-9) and the SSS subsystem Intercepts the holding sound heard by subscriber B and connects the call in the LSS, CSS, and SNS subsystems (4-10) to return to both calls between subscriber A and subscriber B, and call processing control is transferred to the TCS subsystem. Standby service is terminated.

Also, if subscriber A and subscriber C are talking and subscriber C disconnects (4-11) and the LTAS subsystem detects it, the LSS, CSS, and SNS subsystems disconnect the switch between subscriber A and subscriber C, and CAS The subsystem charges the call (4-12), and the SSS subsystem connects subscriber A to the call (4-13).

At this time, when the subscriber A detects this by hook-flashing (4-14) the LTAS subsystem, the SSS subsystem cuts the call sound heard by the subscriber A (4-15) and cuts the holding sound heard by the subscriber B and the LSS. In the CSS and SNS subsystems, the call path is connected (4-16), and the subscriber A and the subscriber B return to the bilateral calls, and call processing control is transferred to the TCS subsystem so that the call waiting service is terminated.

If subscriber A and subscriber B are on a call and subscriber A hooks (4-17) and detects it in the LTAS subsystem, the SSS subsystem sends a pending tone to subscriber B (4-18), and subscriber C The ASS, C, and SNS subsystems are disconnected (4-19), and subscribers A and C make a call.

In addition, if subscriber A and subscriber B are making a call and subscriber A disconnects (4-20) and the LTAS subsystem detects it, the SSS subsystem connects subscriber B with a ringing tone (4-21). The call is disconnected, the switch between subscriber A and subscriber B is disconnected at the LSS, CSS, and SNS subsystems, and the call is charged at the CAS subsystem (4-22).

Since the subscriber C is still waiting for the call, the LTAS subsystem connects the call signal to the subscriber A (4-23), and when the subscriber A answers (4-24), the subscriber signal is disconnected (4-25), The SSS subsystem cuts off the audible tone heard by subscriber C, connects the call paths in the LSS, CSS and SNS subsystems (4-26), converts them to bilateral calls between subscriber A and subscriber C, and transfers call control to the TCS subsystem. Call waiting service is terminated.

In addition, if subscriber A and subscriber B are making a call and subscriber B disconnects (4-27) and detects it in the LTAS subsystem, the LSS, CSS and SNS subsystems disconnect the switch between subscriber A and subscriber B, The CAS subsystem charges the call (4-28), and the SSS subsystem sends a ring tone to subscriber A (4-29).

At this time, when the subscriber A detects this by hook-flashing (4-30) the LTAS subsystem, the SSS subsystem cuts the call sound heard by the subscriber A (4-31), and cuts the hold sound heard by the subscriber C. The LSS, CSS and SNS subsystems connect the call paths (4-32), and the call control is transferred to the TCS subsystem while the subscriber A and the subscriber C are both calls, and the call waiting service is terminated.

Therefore, the present invention carried out by the above processing procedure has the following effects.

As telephone subscribers are easy to use and require various services, electronic switching systems are developing and providing various services. This call waiting service notifies you by listening to the waiting tone when a third party requests an incoming call during the call. If you want to continue to talk with the other party, you do not hook-hook within the waiting time. Alternatively, the user may hold the other subscriber by hook-flashing and call the third party, and may continue the call between the two subscribers if necessary. At this time, if one of the two subscribers disconnects, the subscriber converts to a normal quantum call, so that another service can be received at the request of the subscriber.

In addition, unlike other exchanges, the service can be implemented through a general switch without using a conference call device, thereby enabling service without increasing the capacity of the conference call device, which is a system equipment.

Claims (3)

LTAS to control subscriber and relay line matching, LSS to control time division switch, R2 MFC (MultiFrequency Code) and DTMF (Dual Tone Multiple Frequency) signal transmission and reception, SSS to generate tone, TCS to control basic call processing, special A subscriber exchange access subsystem (ASS) including an OSS for controlling service call processing; An internal network subsystem (INS) including NHS for number translation and routing processing, SNS for controlling space switches and conference call devices, and SNS for controlling various recording guidance devices, CSS for manipulators and space switches; A call waiting service method of an electronic switching system having a central control subsystem (CCS) including a CAS for billing processing and an MSS for collecting and managing statistical data, wherein a subscriber who has registered a call waiting service is in a call. When a third party calls a busy subscriber, the TCS checks whether the called subscriber is busy, performs normal incoming processing when not on a call, and checks whether a waiting waiting service is registered when busy. For example, if the call waiting service is not registered, the call waiting is performed after performing the first steps 2-1 to 2-5 and the first steps 2-1 to 2-5. If a service is registered, call processing control is transferred to the OSS to perform call waiting service incoming call, and after performing the second step (2-6), If the subscriber who is listening to the busy tone requests the call waiting service and performs a hook flash, the call waiting service includes a third step (2-7, 2-8) of performing the call waiting service. Standby service method. 2. The method of claim 1, wherein the second step (2-6), when an incoming call is received to a subscriber during a call by incoming or outgoing call, checks whether the subscriber is busy and whether the waiting call service is registered. , If not registered, handles normal incoming call or processes busy, if registered, connects a switch in the OSS, connects a ring tone to the calling subscriber, and connects a call waiting tone to the called waiting subscriber. After performing the steps 3-1 to 3-17 and the steps 3-1 to 3-17, if the subscriber who hears the waiting tone during the call does not hook the flash within a predetermined time, the SSS connects to the third subscriber. Cutting off the old tones, cutting off the switch at the LSS, CSS and SNS, and continuing to talk to the original counterparties (3-18 to 3-21); and (3-1 to 3-17) Perform After that, if the subscriber who listened to the waiting sound during the hook flash within a predetermined time, connecting the call with the third party subscriber in the LSS, CSS and SNS, and connecting the held tone to the original counterpart subscriber in the SSS ( Call waiting service, characterized in that it comprises a 3-22 to 3-27). 2. The call waiting service in the third step (2-7, 2-8) is performed by the call waiting service subscriber (hereinafter referred to as subscriber A) and the third subscriber (the subscriber). When the subscriber A is making a call and the subscriber A hooks and detects it in the LTAS, the SSS connects a holding tone to the subscriber C and the original counterpart subscriber (hereinafter referred to as subscriber B). Cutting the holding sound heard by the subscriber, connecting the call paths in the LSS, CSS, and SNS to proceed with the call between subscriber A and subscriber B (4-1 to 4-3); and subscriber A and subscriber B make a call. When the subscriber A detects this in the LTAS by hook-flashing, the SSS connects the holding sound to the subscriber B, cuts off the holding sound heard by the subscriber C, and connects the call path in the LSS, CSS and SNS. Let A and subscriber C talk When the subscriber A and the subscriber B are in a call with the system (4-17 to 4-19) and the subscriber A disconnects and detects the LTAS, the subscriber SS disconnects the call by connecting a busy tone to the subscriber B in the SSS. Cut the switch between subscriber A and subscriber B in the LSS, CSS and SNS, charge the call in the CAS, connect the call signal to subscriber A in the LTAS, and if the subscriber A answers, the call signal Truncating, cutting off the hold sound heard by subscriber C in the SSS, connecting a call path in the LSS, CSS, and SNS to allow subscriber A and subscriber C to bilaterally call (4-20 to 4-26); When the subscriber A and the subscriber B are making a call and the subscriber B disconnects and detects the LTAS, the switch between the subscriber A and the subscriber B is disconnected at the LSS, CSS, and SNS, and the CAS is connected to the call. When the SSS connects a call tone to the subscriber A, when the subscriber A flashes or detects the LTAS, the SSS cuts the call tone heard by the subscriber A and cuts off the pending sound heard by the subscriber C. Steps (4-27 to 4-32) of conducting a bilateral call between subscriber A and subscriber C by connecting a call path in LSS, CSS, and SNS, and subscriber A and subscriber C are talking, and subscriber A cuts the LTAS. If the SSS detects this, the subscriber S disconnects a call to the subscriber S in the SSS, disconnects the switch between subscriber A and subscriber C in the LSS, CSS and SNS, and charges for the call in the CAS. After the call, the LTAS connects the call signal to the subscriber A. If the subscriber A responds, the call signal is disconnected, and the SSS cuts off the holding sound heard by the subscriber B. Connecting the call in the LSS, CSS and SNS to proceed with the bilateral call between the subscriber A and the subscriber B (4-4 to 4-10), and the subscriber A and the subscriber C are talking and the subscriber C cuts the LTAS. Detects this, disconnects the switch between subscriber A and subscriber C in the LSS, CSS and SNS, charges for the call in the CAS, connects a ring tone to subscriber A in the SSS, and subscriber A When a hook flash is detected by the LTAS, the SSS cuts off the busy sound heard by the subscriber A, cuts off the pending sound heard by the subscriber B, connects a call path in the LSS, CSS and SNS, and connects with the subscriber A. And (4-11 to 4-16) returning to subscriber B's quantum call.