Technology and development of Wan Chaobu line

Enterprise wiring is developing rapidly. Emerging High-bandwidth services and higher-speed Ethernet standards are being adopted, such as G-bit or now 10G-bit Ethernet, creating a good environment for Internet Protocol (IP) and high-end IP services such as VoIP, IP videoconferencing, and video surveillance and security technologies. Voice, data, and video networks are gradually being integrated into the same infrastructure, with increasing demand for service reliability and quality of service (QoS). A reliable and high-performance structured cabling system is essential for large companies to reduce costs while increasing their productivity and sales, and of course it must be able to handle those high-bandwidth requirements.

Below we analyze the present market demand and the present situation.

First, optical fiber backbone network

LAN backbone is the lifeline of today's network. Just over five years ago, only 20% of LAN traffic reached the backbone; most operations were done by personal computers, files were saved and accessed locally, and file sharing was rare. Today, however, the situation has changed dramatically, and it is estimated that 80% of all traffic reaches the backbone network. Now the application takes the centralized service, the user's file is stored on the server, the file sharing and the sharing situation is very common. The multiplication of Internet application demand and the enhancement of PC multimedia processing ability have increased the burden of backbone network. The backbone network must be able to address this growing demand.

The metropolitan Area Network (man) is a part of the public network, which joins the core of the enterprise and public networks. The current man backbone network has been able to handle 10G services in a SONET/SDH oc-192/stm-64 manner. With the introduction of 1G Ethernet in the late 90 and the adoption of IEEE 10G Ethernet standard (optical fiber), the application of Ethernet technology in man is becoming more and more common. In man's design there are two ideas, one is to use the existing structure such as SONET OC-48 or oc-192c to separate transfer of G-bit and 10G-bit Ethernet, the other is the use of local Ethernet technology for transmission. Regardless of the method chosen, the growth rate of IP services running on real Ethernet or SONET is growing rapidly. It is noteworthy that with the establishment of the 802.3AE 10G Ethernet standard, Ethernet can digest the entire OC signal for the first time without wasting bandwidth. The transfer of G-bit Ethernet on OC-48 (2.4GB/S) can be very inefficient because there is always unused bandwidth in the signal. 10G Ethernet can greatly improve transmission efficiency, it is suitable for OC-192 signals without wasting bandwidth, and allows service providers to provide a wide range of applications. On the other hand, for local Ethernet, companies like Cisco,nortel,lucent,extreme and Foundry are developing 10G Ethernet cards for their fibre switches. Users do not have to worry about time-consuming and expensive protocol conversions and bandwidth efficiency. Now that Ethernet can seamlessly access man, the entire WAN is ready to be open to better ip-based virtual network (VPN) services. (Computer science)

The new high bandwidth service represented by 10G provides newer and higher requirements for the optical fiber system, and the traditional multimode fiber can only support 10G transmission within dozens of meters of the distance. The network industry has launched a series of optical fiber design and testing standards, such as IEC-60793-2-10,-49 and TIA-492AAAC, Tia/eia 455-220. To tie in with the new optical signal transceiver used for 10G applications, ISO/IEC 11801 has developed a new multimode optical fiber Standard grade, the OM3 category, which was formally promulgated in September 2002. The OM3 fiber is optimized for both LED and laser bandwidth modes. The new standard optical fiber cabling system can support at least 10G transmission to 300 meters in multi-mode mode, and can reach 10 km or more in Single-mode mode (1550 nm wavelength can support 40 km transmission distance).

New optical fiber standards for connecting devices also put forward a new requirement, the connector end of the geometry design (including bending radius, vertex offset and ball-shaped incision) directly affect the laser energy reflection, processing precision, directly related to the avoidance of link performance degradation and transceiver damage. In addition, the use of miniaturized optical fiber connectors (SFF) also improves the human interface of the traditional fiber interface.

Two, high bandwidth IP application Multimedia Integrated cabling

Today's network is moving towards centralization. The transmission of data, voice and video over a single medium can save a lot of money. STP Cabling system developed based on Class 7/F standard can transmit independent video, voice and data signals simultaneously in a connector and a single cable. It even supports the transmission of full bandwidth analog video (typically 870MHz) on a single pair of cables, and simultaneous voice and data transmission at the same time on other twisted pair pairs in the same sheath.

In terms of security protection, the need for commercial protection of employees and the defence of intellectual property is as urgent as countering the threat of terrorism. However, traditional security systems have not been able to meet the fast-growing demand. Now, most of the security system requires a more specialized network, and data network separation. Because of the higher requirements for security, these old systems are expensive to operate and do not meet new requirements. What is needed now is a dynamic system with addressable components that can deliver high quality images, voice and data, and use the same network as the current data system. To meet this need, the new security system is based on IP protocol, and each security device (such as retinal scanners, X-ray devices, and so on) becomes a configurable node on the data network. These new advanced security systems integrate voice, data and video on the same platform. The market's demand for these products and systems is growing at an unpredictable rate, with analysts predicting it will reach $40 billion trillion by 2005. Clearly, this market and the emphasis on security are one of the factors driving high-bandwidth services such as 10G bits.

The 7 class/F standard definition of the transmission medium is the line to shield (also known as full screen) STP cable, which in the traditional sheath covered with metal shielding layer/net on the basis of the addition of each twisted pair of separate shielding. The special shielding structure of Class 7/F cable ensures that it can effectively isolate external electromagnetic interference and internal outward radiation. It can also greatly weaken the signal coupling crosstalk between the adjacent line pairs in the sheath, so as to obtain the high bandwidth transmission performance guarantee while increasing the ability of transmitting multiple types of signals in parallel.

The 7 class/F Grade STP wiring system can adopt two kinds of modular interface mode, one kind is the traditional RJ-type interface, its advantage is that the machine can be compatible with the low-level equipment, but it is difficult to meet the standard 600MHz bandwidth because of its inherent structure; Another option is a non-RJ interface, and its site assembly is simple, Ability to provide high-bandwidth services (Simon's Tera? 1.2GHz bandwidth, twice times the standard bandwidth of 7/F, which has not yet been advertised), and has been recognized by ISO/IEC 11801 and approved as a 7 class/F standard interface.

Third, the table-oriented copper cable wiring

In today's new wiring market, 6 types of systems are rapidly becoming the preferred solution for people. However, faced with the emerging IP-based 10G challenges, they can not help but ask, enhanced 5 can also support 10G services, 6 types of cabling can certainly meet the 10G performance requirements?

To address this question, we may wish to take a look at recent activities of the relevant standards Committee:

November 2002 10-15th, a guide to "10gbase-t Challenges and Programmes" was presented at the IEEE802 plenary meeting in Hawaii, and a 10gbit/s Ethernet standard based on twisted-pair copper cabling systems was considered. The following meetings include a number of interesting demonstrations of technical feasibility, broad market potential and economic practicality. A few days later, the IEEE802.3 Working Group and the IEEE Standard Executive Committee (SEC) approved the establishment of the 10GBASE-T Working Group. The Working Group will evaluate the feasibility of the standard 10git/s data rate running at a 100-meter-long horizontal balanced wiring system (e.g. from the workspace to telecommunications), which is regulated by the tia568-b and iso/iec11801 construction wiring standards. The Working group set the deadline for the establishment of standards at 2006 years.

At the February 2003 Tia TR-42.7 meeting, 29 cabling manufacturers agreed to do additional work to support the million-gigabit applications based on six-class/e rather than enhanced 5-class cabling. The Commission, which is responsible for the development of the International wiring Standards (ISO/IEC11801:2002), has a similar position and has made official contact with IEEE802.3 after the meeting in New Zealand in February 2003. The letter mentions that they will be pleased to see that six class/e or better cabling systems can be used to support 10gbase-t applications, but are not interested in enhancing 5 classes.

Compared with the enhanced 5 class, the 6 cabling systems have better anti-noise performance and provide a more transparent and versatile transmission channel, especially in high frequencies. If the PAM-5 coding technique used in 1000BAST-T is adopted, 10G Ethernet requires at least 625MHZ linear transmission performance. Most of the enhanced 5-class cables are only 150MHz or 250MHz, and the standard only requires 100MHz. The 6 classes are not forced to achieve 625MHz performance, but are better media for high-bandwidth transmissions, and many manufacturers offer cable nominal 600MHz, which is expected to require higher performance for applications. Network chips and device manufacturers need a certain level of performance to enable them to produce products that deliver 10G on copper cables. The average noise resistance of Class 6 systems on 6250MHz is higher than that of 5 classes. Using different digital signal processing technology to simulate 100 meters of balanced wiring experiment pointed out: through the chip and wiring manufacturer's efforts, in the six class/e wiring system to run 10GBASE-T target can be achieved. DSP digital signal processing technology, chip developers can remove or compensate for most wiring inside the signal damage, including return loss, near-end crosstalk, the equivalent of remote crosstalk, and insertion loss. The larger the capacity of the cabling system, the less compensation the manufacturer of the network device can make to its product.

Since fiber wiring has been able to support 10G, why do we continue to implement 6 types of wiring?

The new fiber design allows it to handle up to 10GB/S data transmission rates, whereas fiber-optic networking devices and the installation of optical fibres are much more expensive (compared to copper). Most network device manufacturers now have or are developing 10G Ethernet solutions, but most of these are fiber-oriented and high-end products for the backbone. Compared with these products, the 10G products based on twisted pair are easy to be accepted by desktop users, whether from the cost of investment or the convenience of implementation. And with VoIP, VOD, video conferencing, dynamic database access, such as new high-end applications in the common use of the desktop, support for the 10G Service 6 cabling system will be in the level of installation market usher in a new growth period.

From the above analysis can be seen, ip-based 10G service is leading the development of the network. Data show that 90% of the world's network traffic is based on IP protocol, in which the proportion of enterprise VPN in 2005 years will reach 32%, and by 2007 75% of The Voice service will also be transferred to VoIP. At present, 1 Gb Ethernet technology users accounted for 31% of the total, by 2006, more than 750,000 0G Ethernet ports will be ordered, the entire market will be more than 4 billion dollars. Such a huge network market to the wiring industry provides a very attractive opportunity, the traditional wiring system faced with a comprehensive upgrade, to meet the future application requirements of the 10G cabling has become a new era darling.

The uniqueness of today's network expansion is like the enterprise that uses them, but its basic principles are very similar to that of cross market applications. A true 10G cabling system that meets current market needs should have the following characteristics:

1. Designed to address the current emerging ip-based applications

2. A market-driven and global solution, including optical fiber, shielded SCTP and UTP copper cables

3. Quality and innovation and ensure its stability.

4. It is convenient to get a high-end backbone and level solution from the supplier immediately

So, how should we choose the most suitable 10G wiring?

If you want to design a high-speed LAN trunk distance greater than 100 meters, and have interface with man and WAN, and have high security and EMI requirements, such as data center, storage Center, server cluster, VOD, etc., it should be based on OM3 technology fiber cabling System.

If you want to achieve integrated transmission of video on a single transmission medium in a high EMI environment, voice, data or control signals, and consider the future of higher bandwidth applications, such as intelligent building centralized control system, intelligent home, multimedia Terminal station, you can use the 7 class/F-level STP shielding wiring system.

If you are building a strong internal LAN, requires faster network response time, reduced network congestion, support for high-end ERP systems, remote power supply full duplex G-bit Ethernet data Terminal equipment, 3D modeling using real-time holographic technology, interactive point-to-point streaming media for distance education or employee/customer training, With the overall file collaboration of broadband videoconferencing applications, then you should choose the 6 type 10G cabling System.

We know that today's business and IT managers are facing a severe test of upgrading their network communications infrastructure and dealing with applications that have not yet been fully defined. So how do we prepare for those unknown applications? The best solution is to install a cabling system that will support future applications. An integrated 10G cabling system can solve many problems for today's high-end enterprise users, enabling you to integrate business functions and deliver advanced ip-based 10G business Services. The high quality and high performance of the system can reduce the occurrence of network failure, improve your network efficiency and reduce the maintenance period, so as to prevent the great loss caused by the decrease of productivity. moving, adding, and changing can be done effectively, reducing the cost of repetitive work. You will need greater network bandwidth to perform secure IP applications to make your company's assets and your intellectual property more secure. Further, it must support 10GB/S and future applications, it can withstand the test of time and provide a worry-free guarantee for future applications.