Ji Iron ADSL Network System Design
Beijing Synthetic Network Technology Company
2002-12-3
First, foreword 1
Second, ADSL network design principle 2
Third, design demand 4
Fourth, Ji Iron ADSL Network Design Scheme 5
1, ADSL technology principle introduction 5
2, ADSL access model 6
3, ADSL Access Type 9
4, various types of networked network comparison 9
5, Ji Steel ADSL Network Topology 10
6, ADSL device selection 12
7, ADSL device table and fund budget 13
V. Benefit Analysis
I. Introduction
At present, the main network of Ji Iron and Steel Information has been put into use, and the Ji Iron Office Automation System (OA) is in the trial operation phase, and the human resource management system is already in the commissioning phase. General Li Changshun clearly pointed out that in 2003, General Manager Li Changshun clearly implemented the goal of paperless office in April 2003. However, due to the scope of Ji Steel, the main network of Ji Iron and Steel Information is unable to cover the entire area of the Ji Irson General plant, the second district, the three districts, the Huangtai and Guo Mines, and the resources of the main network, If this problem is not solved, not only this goal is difficult to implement, but the future ERP system will also be restricted. Now, the various living districts of Ji Iron and Steel Group cannot access the broadband network, only through ordinary modem dial-up, the Internet speed is extremely slow, can not meet the requirements, and do not achieve the purpose of using OA at home.
With the explosive development of the Internet, commercial applications and multimedia services such as Internet are also rapidly promoted. To enjoy a variety of services on the Internet, users must access the network in some way. In order to realize the digitization, broadband, improve user Internet speed, fiber-free household (ftth) is an inevitable direction of the future development of the user network, but because the cost of fiber network is too high, in the next ten years or even a few Most user networks will continue to use existing copper loops in the past ten years, so people have proposed a number of transitional broadband access network technology, including N-ISDN, CABLE MODEM, ADSL, etc., ADSL ( Asymmetric digital user loops) is the most promising and competitiveness, which will dominate within more and decades.
According to the specific requirements of the company's information and various network access methods, this program proposes ADSL as an access method of the main network of Ji Iron and Steel Information. Units, second districts, three districts, Huangtai, Guo Mine into the main network, the company's lives area through the main network.
Second, ADSL network design principles
1, standardization
The computer management system is to achieve the interconnection of network information and device resources, and complete the interconnection of different manufacturers' equipment and computer software. In a complex large network system, there must be multiple vendors' hardware and software, in order to ensure user network systems have interoperability, availability, reliability, expandability, manageability, this program has established an open form. , Follow the international standard network system.
2, scalability
Due to the continuous development of the user business, the network system will inevitably expand. Therefore, the current network design must have sufficient room for future expansion to protect the investment of the system, can meet the growing application needs within a certain period of time.
3, advanced
Today, the world, communication and computer technology development has changed. This program can adapt to the trend of new technology development, which can ensure the advancement of the network, and also taking into account the maturity of technology. There are more than a dozen suppliers of ADSL network products in the world, which are different in terms of product implementation, but because of their respective techniques and methods of implementation, the actual performance of products makes it different. This program book pays attention to the product with advanced technology and protects the investment in ADSL network construction. 4, availability and reliability
This program fully considers the specific situation of Ji Steel, which is also theoretically feasible, but also actually uses, it is best to adapt to the current demand of Jijie. In order to make the network can run reliably, our program should use high-quality products to minimize the failure rate.
5, high performance
A large network light is not enough, it is necessary to optimize design to truly play the function of the network. Under the premise of existing equipment and technology, improve network performance as much as possible.
6, manageability
With the increase in network size and complexity, management and troubleshooting are more difficult. Our work is increasingly relying on computer system, and the computer will become an indispensable office equipment. The failure of computer systems will give us a lot of money. In order to reduce losses, it is necessary to eliminate the fault as soon as possible, so the network device used network equipment has the ability to network management, and it is more and more important to have a good network management software. It can reduce troubleshooting time, optimize network performance, save money, create benefits. This program will provide advanced and complete network management. Network equipment use intelligent, manageable devices. Ability to achieve monitoring, detect the operation of the entire network, reasonably allocate network resources, management tools to improve network operation performance, and simplify network maintenance work
7, safety
The network system of this program book is capable of preventing illegal access from hardware and software, implementing a full range of security measures and strategies in the network level, protecting user systems is not easy to be attacked from external networks from enterprise network, through the port of ADSL access to the main network Set VLAN and access control to the VLAN to ensure that the ADSL Internet users cannot illegally obtain internal sensitive data.
8, economic
This design plan has started from the benefit of Jinan Iron and Steel Group. He insists on achieving minimal investment in high performance, and maximizing the company's original investment. Utilize the original telephone system and information main network system of Ji Gang, complete the design function, bringing huge economic benefits and social benefits to Ji Iron and Steel Groups.
Third, design demand
In order to accelerate the information construction of Ji Iang, realize the goal of "online Jinji steel", Ji Ingji implemented the main network project of Ji Iron and Steel Information, but the main network of Ji Iron and Steel Information, unable to cover the entire region, second area, and three districts of Ji Ing Iron and Steel General Factory. , The fields of the external fields such as Huangtai and Guo Mines cannot use the resources of the information backbone network. Therefore, it is proposed to use the ADSL network technology as an important supplement to the main network of Ji Iron and Steel Information, and realize the network interconnection of the company, thereby ensuring "online Jinji steel" Implementation of the target.
1. Use the ADSL network technology to realize the units that the information main network covered by the Ji Irson General Plant area is connected to the main network, 120 access points.
2. Use the ADSL network to enable the second district, three districts, Huangtai and Guo Mine and other peripherals and living areas to access the main network. According to 8-10 calculations in the early stage of each Ji Iron 2 unit, 120 points required for the second district, 240 points in the family, total 360 points; three districts need 24 points, family online 120 points, total 144 points; The office needs 24 points, the family is 120 points, a total of 144 points; Guo Mine office needs 24 points, family online 120 points, a total of 144 points.
3. Use the ADSL network to enable the Ji Irson General Factory living area to access the main network to implement the office and the Internet, the points are 360 points. Fourth, Ji Steel ADSL network design plan
1. Introduction to ADSL Technology Principles
ASYMMTRIC DIGITAL SUBSCRIBER LINE, Chinese name is a non-symmetrical digital user line, which is a new name for most people, but this is not important. The key is to place ADSL MODEM at both ends around you. At this telephone line, three information channels have been generated: a high-speed downlink channel with a rate of 1.5Mbps-9Mbps, used for user download information; a speed of 16kbps-1Mbps; a normal duplex channel; one ordinary Vintage phone service channels; and these three channels can work at the same time. In order to separate the effective bandwidth on the telephone line, the multi-channel channel is generated, and the ADSL modem generally adopts two methods, frequency division multiplexing (FDM) or echo cancellation technology. FDM assigns a frequency band as a data downlink channel in an existing bandwidth, and allocates another frequency band as a data uplink channel. The downlink channel is divided into a plurality of high-speed channels and low speed channels through the time division multiplex (TDM) technology. Similarly, the uplink channel is also composed of multiple low speed channels. The echo cancellation technique makes the uplink band and the downlink band, distinguishes between the two-band through local echo cancellation. Current ADSL modems use three line coding technologies, called suppression carrier amplitude and phase, CAP, discrete multi-tone reuse, DMT, and discrete small wave Discrete Wavelet MultiTONE, DWMT. An ADSL modem intersects the data stream in the multi-down channel, in the dual-work channel, and the maintenance channel, and adds an error correction code in each data block, and the receiving end passes this error correction code. Correct the error generated during the transfer process. Experiments show that this error correction coding technology can achieve the requirements of MPEG-2 and other digital image compression methods.
2, ADSL access model
The ADSL's access model mainly has a central switching office module and a remote module.
1> ADSL Central Exchange Logging Module Access Model
The central switching bureaucratic module includes ADSL MODEM and access multiplexing systems in central position, and ADSL MODEM in a central location is called ATU-C (ADSL TRANSMISION UNIT-CENTRAL). Access Multiplexing System Center MODEM is typically combined into one called access node, also referred to as "DSL Access Multiplexer). The remote module consists of a user ADSL Modem and a filter, and the user-end ADSL MODEM is often referred to as ATU-R (ADSL TRANSMISION UNIT-Remote).
2> ADSL Central Exchange Logistics Module Access Model
Ethernet interface external ADSL access diagram
USB interface external ADSL access diagram
PCI Interface Built-in ADSL Access Schematic
3, ADSL access type
Line network network: The user has a fixed static IP address, 24 hours online.
Virtual dial network mode: Not a real phone dial, but the user enters the account, password, and obtains a dynamic IP address through authentication, you can master the initiative of the Internet.
4. Comparison of various types of online networking
Cable Modem: The HFC access scheme of Cable Modem uses a layered tree structure. The advantage is that the bandwidth is relatively high (10m), but this technology itself is a coarse bus type network, which is the user to be and adjacent to users Share a limited bandwidth, when the user has surge on a line, its speed will slow down. Ordinary dial modem and N-ISDN: The highest rate of ordinary dial modem is 56K, the rate of N-ISDN is 128K, ordinary dial modem or ISDN, which transmit data and speech signals on the same copper wire, data signals via a telephone switch device He added the load of the telephone switch.
LAN networking: Using Ethernet online, you cannot use the original fixed-on -phone system, you need to re-lay the network line, even if there are very little Internet users, they need to lay the same line, resulting in undomesticated waste.
ADSL networking: ADSL utilizes the original fixed-telephone system without re-laying the line, providing the on-line asymmetric transmission bandwidth, the downstream speed reaches 8MPDS, upstream speed reaches 1MPDS, the Internet, call mutual interference, exclusive Bandwidth, safe and reliable, when the number of users increases, simply increase the user board, convenient and fast. The disadvantage is that the performance of the line and the loss of the line are large.
5, Ji Iron ADSL network topology
According to the actual needs of Ji Iron, the ADSL network should be built into a high-performance, high-spirited and scalability, high-reliability network system. The network topology is as follows:
1> Set a set of ADSL Listing systems in Ji Iron Base Telecommunications Room, realize the family Internet and the function of office, and access the 100m port of the information main network base access layer switch.
2> Set a set of ADSL local systems in the second floor telecomberge room, realize the unit access to the main network, the ADSL system is connected to the main network center computer room at the core switch 100m port through the RJ45 port.
3> At the two districts, the three districts, the Huangtai and Guo Mine have set a set of ADSL local systems to connect to the core switch of the main network center computer room by fiber transceivers and optical cables. Implementation of Internet and All units of office in the second area, three districts, Huangtai and Guo Mine family.
4> All ports of the Snake Snonnation connection with the ADSL connection are divided into a VLAN, and the access control is set on this VLAN on the core switch, only the HTTP and SMPT ports of the server and network management segments are allowed.
6, ADSL device selection
By comparing the equipment of a number of ADSL manufacturers, this project selection Taiwan's Turndium Cloud Communication Company's DSLAM Local Equipment Turbodsl TN2100 products.
TN2100 Hardware Technologies: TN2100 Based on standard ADSL technology, the ADSL and SHDSL can be supported simultaneously, voice and data can be simultaneously transmitted on the ADSL line. The TN2100 supports a variety of QoS standards, allowing telecommunications service providers to provide a variety of services to end users, and obtain considerable benefits by providing a specific application to end users, TN2100 provides flexible design by modular design and scalable configuration structures. Configuration. The TN2100 can provide 4 STM-1 optical upper line interface with up to 64 extended slots, 384 ADSL interfaces can be implemented on 16 extended slots, each module under real-time network management monitoring You can make a real-time plug operation, and you can upgrade through the remote firmware. TN2100
The TN2100 allows up to 4 STM-1 or DS-3 interfaces to access the backbone network as its uplink interface, and also provide standard interfaces such as E1, 10M / 100M Ethernet and optical fibers. The entire system can reach 1.6Gbps throughput, and 155Mbps bandwidth can be provided for each slot.
TN2100 Features: Based on the ATM standard DSL multiplexer, there can be a variety of uplink interfaces based on support IP standards; implement customer identity automatic authentication, IP address automatic assignment, no need to add a server, reduce investment And management; high-density port; user line to the trunk, trunk to the trunk, the user line to the user line exchange architecture; high reliability with redundant structure; support hot plug module, can extend to thousands of ports, support more Type DSL, support traffic, queuing, mapping, and congestion control. 7, ADSL device table and fund budget
1, all ADSL
Satellite base ADSL equipment material table (360 line)
Serial number
name
model
unit
Quantity
unit price
Total price
1
DSLAM rack
TN-2100
A
1
28136
28136
2
Splitter rack
YCL
A
1
1416
1416
3
BRAS PC
TN-5200
A
1
15452
15452
4
CPU card
DC-2200
Piece
1
3541
3541
5
WAN card
DW-2100
Piece
1
10688
10688
6
Core card
DR-2100
Piece
1
21891
21891
Seduce
Line card
DL-2102
Piece
15
9271
139065
8
PCI I / O card
Piece
0
9
Splitter PCB card
Piece
15
1287
19305
10
19 'standard cabinet
2 meters
A
1
1500
1500
11
Distribution frame
A
0
12
SCSI line
3 meters
Strip
15
52
780
13
SCSI line
30 m
Strip
30
161
4830
14
Client
360
453
163080
15
other materials
total
409684
Communication Building ADSL equipment material table (120 lines)
Serial number
name
model
unit
Quantity
unit price
Total price
1
DSLAM rack
TN-2100
A
1
28136
28136
2
Splitter rack
YCL
A
1
1416
1416
3
BRAS PC
TN-5200
A
1
15452
15452
4
CPU card
DC-2200
Piece
1
3541
3541
5
WAN card
DW-2100
Piece
1
10688
10688
6
Core card
DR-2100
Piece
1
21891
21891
Seduce
Line card
DL-2102
Piece
5
9271
46355
8
PCI I / O card
Piece
0
9
Splitter PCB card
Piece
6
1287
7722
10
19 'standard cabinet
2 meters
A
1
1500
1500
11
Distribution frame
A
0
12
SCSI line
3 meters
Strip
6
52
312
13
SCSI line
30 m
Strip
12
161
1932
14
Client
EA-110
station
120
453
54360
15
other materials
total
193305
Second District ADSL equipment material table (360 line)
Serial number
name
model
unit
Quantity
unit price
Total price
1
DSLAM rack
TN-2100
A
1
28136
28136
2
Splitter rack
YCL
A
1
1416
1416
3
BRAS PC
TN-5200
A
1
15452
15452
4
CPU card
DC-2200
Piece
1
3541
3541
5
WAN card
DW-2100
Piece
1
10688
10688
6
Core card
DR-2100
Piece
1
21891
21891
Seduce
LINE card DL-2102
Piece
15
9271
139065
8
PCI I / O card
Piece
0
9
Splitter PCB card
Piece
15
1287
19305
10
19 'standard cabinet
2 meters
A
1
1500
1500
11
Distribution frame
A
0
12
SCSI line
3 meters
Strip
15
52
780
13
SCSI line
30 m
Strip
30
161
4830
14
Fiber Transceiver
A
2
1000
2000
15
Client
EA-110
station
120
453
54360
16
other materials
total
302964
Three District ADSL equipment material table (144 lines)
Serial number
name
model
unit
Quantity
unit price
Total price
1
DSLAM rack
TN-2100
A
1
28136
28136
2
Splitter rack
YCL
A
1
1416
1416
3
BRAS PC
TN-5200
A
1
15452
15452
4
CPU card
DC-2200
Piece
1
3541
3541
5
WAN card
DW-2100
Piece
1
10688
10688
6
Core card
DR-2100
Piece
1
21891
21891
Seduce
Line card
DL-2102
Piece
6
9271
55626
8
PCI I / O card
Piece
0
9
Splitter PCB card
Piece
6
1287
7722
10
19 'standard cabinet
2 meters
A
1
1500
1500
11
Distribution frame
A
0
12
SCSI line
3 meters
Strip
6
52
312
13
SCSI line
30 m
Strip
12
161
1932
14
Client
EA-110
station
144
453
65232
15
Fiber Transceiver
A
2
1000
2000
16
other materials
total
215448
Huangtai ADSL equipment material table (144 line)
Serial number
name
model
unit
Quantity
unit price
Total price
1
DSLAM rack
TN-2100
A
1
28136
28136
2
Splitter rack
YCL
A
1
1416
1416
3
BRAS PC
TN-5200
A
1
15452
15452
4
CPU card
DC-2200
Piece
1
3541
3541
5
WAN card
DW-2100
Piece
1
10688
10688
6
Core card
DR-2100
Piece
1
21891
21891
Seduce
Line card
DL-2102
Piece
6
9271
55626
8
PCI I / O card
Piece
0
9
Splitter PCB card
Piece
6
1287
7722
10
19 'standard cabinet
2 meters
A
1
1500
1500
11
Distribution frame
A
0
12
SCSI line
3 meters
Strip
6
52
312
13
SCSI line
30 m
Strip
12
161
1932
14
Client
EA-110
station
144
453
65232
15
Fiber Transceiver
A
2
1000
2000
16
other materials
total
215448
Guo Mine ADSL Equipment Material Table
Serial number
name
model
unit
Quantity
unit price
Total price
1
DSLAM rack
TN-2100
A
1
28136
28136
2
Splitter rack
YCL
A
1
1416
1416
3
BRAS PC
TN-5200
A
1
15452
15452
4
CPU card
DC-2200
Piece
1
3541
3541
5
WAN card
DW-2100
Piece
1
10688
10688
6
Core card
DR-2100
Piece
1
21891
218917
Line card
DL-2102
Piece
6
9271
55626
8
PCI I / O card
Piece
0
9
Splitter PCB card
Piece
6
1287
7722
10
19 'standard cabinet
2 meters
A
1
1500
1500
11
Distribution frame
A
0
12
SCSI line
3 meters
Strip
6
52
312
13
SCSI line
30 m
Strip
12
161
1932
14
Client
EA-110
station
144
453
65232
15
Fiber Transceiver
A
2
1000
2000
16
other materials
total
215448
Six sets of ADSL Total investment: 409684 193305 302964 215448 * 3 = 1552297 yuan
V. Benefit Analysis
After the implementation of this project, we can first enable access to the fiber LAN to access some areas, second districts, three districts, Huangtai and Guo Mines. Using ADSL to access the main network to achieve office automation, and for future ERP The implementation laying foundation.
This project utilizes the original Jijie fixed telephone system without re-laying network lines, and realizes network connections within the scope of Ji Ingjiang Corporation, saving a large number of line construction funds.
After the implementation of this project, it is possible to facilitate the employee to go online, enrich the employee's amateur life, improve the cultural quality of employees, and inspire the work of employees.
