KR100208290B1 - Call limiting method of exchange system - Google Patents

Abstract

The present invention relates to a call limiting method of an electronic switching system suitable for restricting call connection by call origination of each subscriber by setting a classification for each subscriber in the DTS-1100A (DTS-1100 improved electronic switching system). Although the call restriction function is implemented in the DTS-1100A electronic switch according to the prior art, it is not organized and does not have various functions, so the effectiveness of the call restriction is not achieved. However, in the present invention, each subscriber accesses the local or private network. Therefore, when trying to use a specific type of service or function that is already implemented, each subscriber can be classified to limit its use, thereby reducing the charges and efficiently using the switching network. It is.

Description

Call Limitation Method of Electronic Switching System

The present invention relates to a call limiting method of an electronic switchboard, and in particular, to set a classification for each subscriber in the DTS-1100A (DTS-1100 enhanced) electronic switchboard so as to restrict call connection by call origination of each subscriber. It relates to a call limiting method of an electron exchanger suitable for.

DTS-1100 Enhanced Switchboard is an international standard electronic switch that is used for local, local / Tandem and CENTREX of PSTN (Public Switched Telephone Network) and ultimately ISDN It has been developed to be a flexible exchanger in various network types such as intelligent network (IN).

The DTS-1100 is an advanced system developed by applying the latest technologies in the fields of computer, semiconductor, communication, and software. It is suitable for all applications in terms of external size, performance, service flexibility, and adaptability to network environment.

The DTS-1100 enhanced system is one of the existing commercialized and commercialized services such as voice (Local / Tandem), CENTREX, ISDN (2B + D, 30B + D), and common line signaling (CCS N0.7). The system was opened to play a major role in a comprehensive information and telecommunications network that can all be accommodated by the system.

The main design concept of the DTS-1100 retrofit is an open architecture that provides flexibility and modularity to make it easier to expand and modify the system and to improve the system as technology advances. Adopted.

In other words, the system structure is designed to minimize the impact of technological development, and is designed in consideration of economics to provide advanced services to subscribers at a more economical price.

The main considerations in the design of the DTS-1100 advanced system are as follows.

* Simplify hardware by maximizing modularity

* Realization of economical efficiency by maximizing hardware usage efficiency

* Economic feasibility by maximizing software processing function

* Increased system configuration flexibility through subsystem combination

* Maximization of operation and maintenance by simplifying hardware

* High performance and high reliability

* Enhanced software implementation and maintenance

* Easy to add new features

The DTS-1100 retrofit is available in a variety of packages.

The DTS-1100 is a system that can accommodate up to 8,192 subscribers and 1,080 trunk lines, and has a distributed control concept that can handle 1,200 Erlang traffic and 150,000 Busy Hour Call Attempts (BHCA). The capacity is extended by 1500 lines.

Concentration ratios can be 4: 1 or 8: 1.

In this regard, in the DTS-1100A electronic switch in accordance with the prior art, a limited function is implemented, but the system is not structured and the functions are not diversified.

In the case of companies and public institutions where the variety of positions and the limitations of work are clearly distinguished, telephone work is a significant amount.

Thus, listening to the requirements of each member without limitation can overspend the agency's expenses and unilateral restrictions can lead to disruption of work.

Therefore, there is a need for a systematic and diverse call restriction function suitable for cost reduction and efficient work performance by limiting call limits or services of the switching network according to each user's position or job characteristics.

Accordingly, the present invention has been made to solve the above-mentioned drawbacks of the prior art, and when each subscriber attempts to use a specific type of service or function that is already implemented by accessing a local or private network, a classification for each subscriber is provided. The purpose of the present invention is to provide a call restriction method of an electronic exchanger that restricts its use.

Figure 1 is a block diagram showing an embodiment of the DTS-1100A all-electronic exchange for applying the call restriction method of the all-electronic exchange according to the present invention.

2 is a detailed block diagram of the ASSO, IOS, RSS according to FIG.

* Explanation of symbols for main parts of the drawings

10: ASSO 20: ASS1

30: ASS2 100: CSM

200: IOS 300 to 380: RSS

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, an embodiment of the present invention for achieving the above object in detail.

Referring to FIG. 1, FIG. 1 is a block diagram showing an embodiment of a DTS-1100A electronic switch in order to apply the call limiting method of the electronic switch according to the present invention. ASS (Access), which provides a matching function for accommodating a predetermined subscriber and a relay line, a signal from the subscriber, a signal processing function for a predetermined exchange period, a switching function for a call, and a subscriber circuit and a line test function Switching Subsystem) 0, 1, 2 (10,20,30) and ASSO, 1, 2 (10,20,30) are connected using the corresponding ASS and transmission path and controlled by the main body exchanger to perform remote exchange function. In the event of a failure with transmission to the main exchanger, a plurality of RSS (Remote Switching Subsystem) 300 to 380 which independently perform all call processing functions according to their own zones, and ASSO, 1, 2 ( Program loading to 10,20,30, and Performs data backup (back-up), storage, analysis function, provides MMC (Man Machine Communication) function with the operator and uses system failure information collected by ASSO, 1,2 (10,20,30) Input Output Subsystem (IOS) 200 providing visual and audible alarms to the operator, and connected to the T-bus to ensure that the signaling between the main exchange and the power becomes a common channel signaling (Common Channel Signaling No. 7). It comprises a Common Signaling Module (CSM) (100).

The present invention thus achieved will be described in detail with reference to FIG.

2 is a detailed block diagram of the ASSO 10, the IOS 200, and the RSS 300 according to FIG. 1.

First, ASSO, 1, 2 (10, 20, 30) is a basic unit system of the DTS-1100 Enhanced Electronic Switching System, which has a matching function for accommodating subscribers and trunk lines, signal from subscribers and signal exchange periods, It provides subscriber circuit and line test function in addition to the switch function for the call connection. The configuration of each of ASSO, 1, 2 (10, 20, 30) is as follows.

Control Module (CM): 16, 32-bit microprocessor

Access Module (AM): up to 3,072 subscribers and 360 digital trunk lines

Switching Module (SM): 1K Time Switch (4K time switch added for connection between ASSO, 1, 2 (10, 20, 30))

STM (Signalling and Test Module): 16 tones, 16 guidance messages (only available in tones), 95 DTMF signal channel, subscriber circuit and line tester

Next, the RSS (Remote Switching Subsystem) 300 to 380 is connected to the corresponding matching unit (AM) in the corresponding ASSO, 1, 2 (10, 20, 30) using a transmission path of 2,048 Kbps to control the main body exchange. In the event of a failure in the transmission path with the main exchanger, it performs all call processing functions within the RSS (300 to 380) alone, that is, its corresponding zone. Each configuration of the RSS (300 to 380) is basically performed. ASSO, 1, 2 (10,20,30) is the same as

Control Module (CM): 16, 32-bit microprocessor

Access Module (AM): 1E1 link with up to 480 subscribers

Switching Module (SM): 1K time switch

STM (Signalling and Test Module): 16 tons, 16 guidance messages (transmittable in tones), 32 DTMF signal channels, subscriber circuit and line tester

In addition, the IOS 200 performs program loading, data back-up, storage, and analysis functions to ASSO, 1, 2 (10, 20, 30), and an operator's MMC (Man Machine Communication) function. ASSO, 1, 2 (10, 20, 30) by using the system failure information collected by the operator to provide visible and audible information to the operator, it is configured using a PC and the basic specifications are as follows.

CPU: Intel 486DX 33MHz or higher

RAM: 16 Mbytes

Cash: 256 Kbytes

HDD: 340 Mbytes

FDD: 3.5, 5.25 each

I / O port: 1 parallel, 2 serial ports

Video: Super VGA

Operating System (OS): Various options such as Pro_UNIX

CTD: 150 Mbytes

Modem: 9600 bps

Multi I / O: 4 serial port

In addition, the matching unit AM is a module that performs the matching function with the external devices of the system through the LP (Line Processor) control in the control unit CM, analog subscriber, BRI, PRI, analog relay line, digital relay line connection, RSS, etc. It can be connected and controlled at the same time, the configuration can be adjusted as needed.

A maximum of six matching units (AM) can be accommodated in one ASS, and each matching unit (AM) can accommodate up to 512 general subscribers and 120 channels of digital relay lines.

Next, STM is a module that is responsible for signal transmission and reception and subscriber testing, and provides various tones and guidance messages at the time required for subscribers in call processing, and receives and exchanges DTMF signals from push button telephones. R2 transmitters / receivers, etc., are used to transmit and receive period signals, and include test equipment for testing analog and ISDN subscriber circuits and line conditions.

The provision channel of the signal processing device is as follows.

Tone: Up to 32 channels (when not accepting guidance messages)

Guide message: Up to 16 messages

MFC channel: up to 95 channels (including DTMFR and R2)

The switching unit (SM) is a basic ASSO, a time switch capable of exchanging 1,024 channels on 1, 2 (10, 20, 30) units and a call mixer capable of multiple call access to 32 channels. In order to exchange channels between ASS, Matrix Time Switch that can exchange 4K channels and ASSO, 1, 2 (10, 20, 30) to synchronize various clocks (Clock) It consists of a network synchronizer to provide and synchronize the exchange period.

The control unit CM has a two-layer structure of a main processor (MP) using a 32-bit microprocessor and a peripheral processor (PP) using a 16-bit microprocessor.

The main processor (MP) controls various connections through the L-BUS, which are intended to be the leading functions of call processing, operation and maintenance, while simultaneously controlling the switching unit (SM) and STM. Control via

The peripheral processor PP is connected to the matching unit AM under the control of the processor MP through the B-bus.

In addition, the input output module (IOM) in the IOS 200 is a module for controlling input and output of the system, and loads a program of the main processor (MP), performs a backup function of the changed data, and simultaneously establishes a communication channel between the operator and the system. to provide.

The IOM can accommodate auxiliary tapes, the Cartridge Tape Driver (DTD) and the Floppy Disk Driver, and can expand up to four RS-232C ports and provide remote audible alarms. To drive.

Next, the Common Signaling Module (CSM) 100 is a module required to be connected to the T-bus to make the signaling method with the power station the common channel signaling method (Common Channel Signaling NO.7). It is responsible for some of the Level 1, Level 2, and Level 3 functions of the Message Transfer Part (MTP).

Looking at the interconnection (Interconnection) according to the present invention as follows.

The sub-highway is a data path connecting the matching unit AM, the STM, and the switching unit SM.

The SHW is a 2,048Kbps digital path multiplexed with 32 64Kbps channels. A total of 32 SHWs in the switching unit (SM) are allocated up to 28 SHW units in 8, 4, and 2 SHW units to the matching unit (AM). 3 SHW, 1 SHW is allocated for the Call Mixer for conference calls.

The L-bus is a 16-bit parallel bus for communication with signal devices, subscribers, relay line matching units, and test devices whose control systems are external devices, and multiplexed address and data lines to reduce signal lines. The control signal is used instead of the serial bus between subscribers.

In addition, up to 18 external devices are addressed on the L-bus itself, and consist of external device addressing GAL, bus matching EPLD and buffer.

The T-bus constitutes a circuit for serial communication according to the HDLC protocol between T-level devices, and the main processor (MP) and the input output processor (IOP) are round robin. If there is information to be transmitted in its own turn, it can be transmitted to the counterpart processor.

In HDLC serial communication, the transfer rate uses 409.6Kbps and can be increased up to 1Mbps.

The B-bus provides a path for the Peripheral Processor (PP) to exchange IPCs with the Main Processor (MP). Up to six Line Processors (LP) can be bus-owned in a round-robin fashion. The transfer rate uses 409.6Kbps and can be increased up to 1Mbps.

And look at the capacitor (Capacity) of the electro-electronic exchange according to the present invention.

1) Subscriber: Maximum 8,192 lines (analog subscriber)

Up to 4,096 lines (2B + D ISDN subscribers)

2) Repeater Line: Maximum 1,080 lines (digital repeater line)

Up to 1,152 lines (analog relay line)

3) I / O device

Control unit: Inter 486DX, 50MHz

Memory: HDD 340MB, RAM 16MB

Cash: 256Kbyte

I / O Port: 2 serial, 1 parallel

Secondary storage device: FDD, CTD 150MB

Expansion I / O: 4 serial ports

In the electronic switch according to the present invention, a random access memory (RAM) in each CM of the ASSO, 1, 2 (10, 20, 30) through the IOS 200 (not shown in the drawing). A predetermined call restriction function can be realized by resident a program for predetermined call restriction as follows.

As an unrestricted service (UNR), all incoming / outgoing calls from the switching network are possible without restriction.

Conditionally unrestricted service (CUN), which applies a non-restricted class of service to calls identified by ANI (automatic number identification) for outbound calls and for calls that are not confirmed. Toll restrictions apply.

Conditionally toll denied service (CTD), which applies unrestricted class of service to calls identified by basic alternate route selection (BARS) / network alternate route selection (NARS) for outbound calls. For those who do not, the toll limits apply.

Toll denied service (TLD), which allows outgoing subscribers to internal exchanges or selected exchanges if the subscriber is affected by code restriction; do.

However, toll access is permitted via guides or unrestricted stations.

-A semi-restricted service (SRE) that is not accessible to the switched network.

However, access to the exchange network is permitted via guides or unrestricted countries.

At this time, the executable file for resident the program for call restriction described above will be stored in the storage location, such as the peripheral storage device.

As described above, the present invention is charged by placing a classification for each subscriber and limiting its use when each subscriber tries to use a specific type of service or function that is already implemented by accessing the local or facility network. The cost is reduced and the exchange network can be used efficiently.

Claims (3)

Multiple ASSs (Access) that are connected to each other and provide matching functions for accommodating predetermined subscribers and relay lines, signal processing from subscribers and predetermined exchange periods, switching functions for communication lines, subscriber circuits and line test functions. Switching Subsystem) and a plurality of ASSs that are connected to the corresponding ASSs to perform remote exchange functions under the control of the main exchanger, and perform all call processing functions according to their own zones in case of a failure with the main exchange. RSS (Remote Switching Subsystem), program loading (Backup), data back-up, storage, analysis of the plurality of ASS, and provides a MMC (Man Machine Communication) function with the operator IOS (Input Output Subsystem) which provides audible and audible alarms to the operator using system fault information collected by multiple ASSs, and the multiple ASSs. In the all-electronic exchanger which is connected and comprises a CSM (Common Signaling Module) which makes the signaling method between the main exchange and the power station become the common channel signaling method (Common Channel Signaling No. 7), the plurality of ASSs in the outgoing call. Conditionally unrestricted service (CUN), which applies a non-restricted class of service to calls identified by ANI (automatic number identification) and a toll restriction class for unverified calls. Call restriction method of an electronic switch, characterized in that for executing the call restriction function. Multiple ASSs (Access) that are connected to each other and provide matching functions for accommodating predetermined subscribers and relay lines, signal processing from subscribers and predetermined exchange periods, switching functions for communication lines, subscriber circuits and line test functions. Switching Subsystem) and a plurality of ASSs that are connected to the corresponding ASSs to perform remote exchange functions under the control of the main exchanger, and perform all call processing functions according to their own zones in case of a failure with the main exchange. RSS (Remote Switching Subsystem), program loading (Backup), data back-up, storage, and analysis functions to the plurality of ASS, and provides MMC (Man Machine Communication) function with the operator An input output subsystem (IOS) that provides a visual and audible alarm to an operator using system failure information collected by a plurality of ASSs, and the plurality of ASSs. In the all-electronic switch, which is connected and includes a CSM (Common Signaling Module) for signaling between the main body exchange and the power station to be a common channel signaling method (7), the plurality of ASSs are assigned to the outgoing call. Conditionally restricted service to apply a non-restricted class of service for calls identified by basic alternate route selection (BARS) / network alternate route selection (NARS) and toll-free class for unconfirmed calls. toll denied service (CTD) to implement a call restriction function. Multiple ASSs (Access) that are connected to each other and provide matching functions for accommodating predetermined subscribers and relay lines, signal processing from subscribers and predetermined exchange periods, switching functions for communication lines, subscriber circuits and line test functions. Switching Subsystem) and a plurality of ASSs that are connected to the corresponding ASSs to perform remote exchange functions under the control of the main exchanger, and perform all call processing functions according to their own zones in case of a failure with the main exchange. RSS (Remote Switching Subsystem), program loading (Backup), data back-up, storage, and analysis functions to the plurality of ASS, and provides MMC (Man Machine Communication) function with the operator An input output subsystem (IOS) that provides a visible and home alarm to an operator using system failure information collected by a plurality of ASSs, and the plurality of ASSs. In the electronic switch which is connected and includes a CSM (Common Signaling Module) for signaling between the main exchange and the power station to be the common channel signaling method (Common Channel Signaling NO. Call restriction for toll denied service (TLD), which allows subscribers to be affected by code restriction, to allow outgoing calls to internal exchanges or selected exchanges, and to apply a toll limit class in other cases. Call restriction method of the electronic switch, characterized in that for executing.