KR0182682B1 - Structure of full electronic switching system - Google Patents

Abstract

The present invention relates to the structure of the DTS-1100A electronic switchboard, which is adapted to a small capacity, and in the present invention, a matching function for receiving subscribers and relay lines connected to each other by a T-bus, and from the subscriber. Signal and exchange periods ASS0, 1, 2 (10,20,30), which provide subscriber circuit and line test function, as well as signal processing function and switch function for call connection, and corresponding ASS0, 1,2 (10,20) (30) and RSS (300 to 380) connected to each other using a transmission path to perform an exchange function under the control of the main exchanger, and perform their respective area call processing functions independently in case of a failure in the transmission path with the main exchanger. , Program loading to ASS0, 1, 2 (10,20,30) via T-bus, data backup, storage and analysis function, MMC function with operator, ASS0, 1, 2 (10,20) System failure information collected by Small capacity electronics having various functions, including IOS (200) for providing a visual and audible alarm to the operator, and CSM (100) connected to the T-bus and the signaling system between the main body and the power as a common signaling method The exchanger can be realized.

Description

Structure of the electronic exchanger

1 is a block diagram showing an embodiment of the structure of the DTS-1100A electro-electric exchanger according to the present invention.

2 is a block diagram illustrating one embodiment of ASS, IOS, and RSS according to FIG. 1;

* Explanation of symbols for main parts of the drawings

10: ASS0 20: ASS1

30: ASS2 100: CSM

200: IOS

RSS: 300, 310, 320, 330, 340, 350, 360, 370, 380

TECHNICAL FIELD The present invention relates to the structure of an electron exchanger, and more particularly, to the structure of an electron exchanger adapted for small capacity as the structure of the DTS-1100A (improved) alliance exchanger.

In this regard, the DTS-1100 Enhanced Exchanger is an international standard electronic exchange that is used for local, local / tandem, and CENTREX of PSTN (Public Switched Telephone Network). It was developed to develop into a flexible exchange in various network types such as communication network (ISDN) and 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 heterogeneous size, performance, service flexibility, and adaptability to network environment.

The DTS-1100 advanced system combines existing services such as voice (Local / Tandem), CENTREX, ISDN (2B + D, 30B + D), and common signaling (CCS NO.7) functions. It has been developed to play a major role in a comprehensive information communication network that can be accommodated as a 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 easily improve the system as technology advances. Adopted.

In other words, the system structure is designed to minimize the nutrition according to the technology 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 call processing capacity BHCA (Busy Hour Call Attempts). The capacity is extended by 1500 lines in units of (RACK).

The collection ratio may be 4: 1 or 8: 1.

The main specifications of the DTS-1100 Enhanced Exchanger are shown in Table 1.

Distributed control structure:

The DTS-1100 variant adopts a dual processor architecture with general purpose 32-bit and 16-bit microprocessors to increase modularity and improve reliability.

The control function is implemented in a control layer structure of two levels of the upper processor and the lower processor.

The upper processor, called the Main Processor (MP), performs higher functional tasks such as call processing, number translation, exchange control, multi-frequency signal processing, system maintenance and operation, and the peripheral processor (PP). The subprocessor, called Peripheral Processor, performs tasks that require real-time processing of the lower layers, such as path detection, analysis, and line signal processing.

Function distribution is performed by distributing various functions to the processors, and the PP and call processing processors adopt a load distribution method for easy addition as the system is expanded.

Operating system:

The operating system of the DTS-1100 enhanced system basically performs processor management by FIFO (First In First Out), and requires interrupt processing and real-time processing to perform urgent processing according to the case. The Real Time Clock is operated to perform the function.

In addition, interprocessor communication processing is performed, and control system redundancy processing is performed.

Programming language:

The DTS-1100 variant adopts the C language for software programming, and the Assemble language for hardware matching that requires real-time.

Redundancy:

In order to increase system reliability, all the major parts of the DTS-1100 retrofit, namely the main processor (MP), peripheral processor (PP), etc., are all duplicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a structure of an electro-electronic exchanger which enables to realize a small-capacity electro-electric exchanger having various functions.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention for achieving the above object is as follows.

Referring to FIG. 1, FIG. 1 is a block diagram showing an embodiment of the structure of the DTS-1100A electronic exchange according to the present invention, and is connected to each other by a predetermined T-bus to connect a predetermined subscriber and a relay line. ASS (Access Switching Subsystem) 0, 1, 2 (10) that provides subscriber circuit and line test function as well as matching function to accept, signal from subscriber and predetermined exchange period signal processing, and switch function for call connection. 20,30 and ASS0, 1, 2 (10,20,30) are connected by using the corresponding ASS and transmission path and under the control of the main exchanger to perform the remote exchange function, and when the transmission path failure with the main exchanger occurs. Multiple remote switching subsystems (RSS) 300 to 380 that perform all call processing functions according to their zones alone, and program loading to ASS0, 1, 2 (10, 20, 30) via T-bus ( Load, back up, save, analyze IOS (Input Output Subsystem) that provides the MMC (Man Machine Communication) function with the operator and provides the operator with audible and audible alarms using the system fault information collected by ASS0, 1, 2 (10, 20, 30). (200), and a CSM (Common Signaling Module) (100) which is connected to the T-bus and the signaling method between the main body exchange and the power is a common channel signaling method (Common Channel Signaling NO.7).

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

FIG. 2 is a block diagram illustrating an embodiment of an Access Swithching Subsystem (ASS), an Input Output Subsystem (IOS), and a Remote Swithching Subsystem (RSS) according to FIG.

First, ASS0, 1, 2 (10, 20, 30) are the basic unit systems of the DTS-1100 enhanced electronic switch, and the matching function for accommodating the subscriber and the trunk line, the signal from the subscriber and the exchange signal processing function, It provides subscriber circuit and line test function as well as switch function to connect with call. Each configuration of ASS0, 1, 2 (10, 20, 30) is as follows.

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

Access MoUdle (AM): up to 3,072 subscribers and 360 digital relay lines

Switching Module (SM): 1K Time Switch (4K time switch added for connection between ASS0, 1, 2 (10, 20, 30))

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

Next, the RSS (Remote Switching Subsystem) (300 to 380) is connected to the matching unit (AM) in the corresponding ASS0, 1, 2 (10, 20, 30) by using a transmission path of 2,048 Kbps, While performing the exchange function under control, when the transmission path failure with the main exchanger occurs, all call processing functions within the RSS 300 to 380, that is, its corresponding zones are independently performed. Basically, it is same as ASS0, 1, 2 (10,20,30) and is as follows.

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

Access Module (AM): Up to 480 subscribers, 1E1 link

Switching Module (SM): 1K time switch

Signaling and Test Module (STM): 16 tones, 16 guidance messages (only available in tones), 32 DTMF signal channels, subscriber circuits and line test equipment

The IOS 200 performs program loading, data backup (Back_up), storage, and analysis functions to ASS0, 1, 2, (10, 20, 30), and MMC (Man Machine Communication) function with the operator. It provides a visual and audible alarm to the operator by using the system fault information collected by ASS0, 1, 2 (10,20,30), and is configured using a PC. 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

· Various choices such as Operating System (OS) 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 time switch capable of exchanging 1,024 channels on a basic ASS0, 1, 2, (10, 20, 30) unit and a call mixer capable of multiple call connection to 32 channels. It consists of Matrix Time Switch that can exchange 4K channels for channel exchange between ASS, and various clocks to synchronize ASS0, 1, 2 (10, 20, 30). It is composed of a network synchronizer to provide an exchange and to 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 main 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 secondary tape cartridge cartridge drivers (CTDs) and floppy disk drivers, expandable up to four RS-232C ports, and remote audible alarms. To drive.

Next, the CSM (Common Signaling Module) 100 is connected to the T-bus and is required to make a common channel signaling method (Common Channel Signaling NO.7) with a power station. It provides 7 signaling links and is responsible for the level 1 and level 2 functions of the message transfer part (MTP) and some functions of level 3.

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.

SHW is a 2,048Kbps digital path multiplexed with 32 64Kbps channels. A total of 32 SHWs in the switching unit (SM) are assigned 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 transmit frequency uses 409.9 Kbps and can be increased up to 1Mbps.

And look at the capacity (Capacity) of the electron exchanger according to the present invention.

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

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

2) Relay line: Maximum 1,080 lines (digital relay line)

Up to 1,152 lines (analog relay line)

3) I / O device

Controller: Intel 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

As described above, the present invention is connected to each other by the T-bus, the matching function for accommodating the subscriber and the relay line, the signal and switching period signal processing function from the subscriber, the subscriber circuit and line test in addition to the switch function for the call path ASS0, 1, 2 (10,20,30) that provides functions, etc., and ASS0, 1,2 (10,20,30), which are connected to each other using a transmission path, are controlled by the main body exchanger to perform the exchange function. In the event of a failure with transmission to the main exchanger, RSS (300 to 380) performs its own area call processing function independently, and program loading to ASS0, 1, 2 (10, 20, 30) via T-bus. And data backup, storage and analysis function, and provide MMC function with operator and provide visible and audible alarm to operator by using system fault information collected by ASS0, 1, 2 (10, 20, 30). Connected to the IOS 200 and the T-bus, It made, including the CSM (100) so that the common channel signaling system is a signaling system that can realize a small volume around the electron exchange of a variety of functions.

Claims (3)

Connected to each other by a predetermined T-bus, a joining function for accommodating a predetermined subscriber and a relay line, a signal processing function for a signal from a subscriber and a predetermined exchange period, a switch function for connecting to a telephone line, a subscriber circuit and a line test function, etc. ASS0, 1, 2 (10, 20, 30) to provide; All of the ASS0, 1, 2 (10, 20, 30) are connected by using the corresponding ASS and transmission path and under the control of the main exchanger to perform a remote exchange function, and when the transmission path failure with the main exchanger occurs, A plurality of RSSs 300 to 380 which perform call processing functions alone; Performs program loading and data backup, storage, and analysis functions to the ASS0, 1, 2 (10, 20, 30) through the T-bus, provides an MMC function with an operator, and the SS0, 1, 2 (10) IOS 200 for providing a visible and audible alarm to the operator by using the system failure information collected by the; And a CSM (100) connected to the T-bus so that the signaling system between the main body exchange and the power is a common line signaling system. The structure of claim 1, wherein the transmission path connected to the RSS (300 to 380) is a transmission path of 2,048 Kbps. The structure of claim 1, wherein up to four common line signaling links are provided for common line signaling according to the CSM.