In 2007, the FTTH industry entered a period of rapid development.The smooth progress of the EPON equipment interoperability test between China Telecom and China Netcom has cleared up doubts about equipment standards for FTTH construction.At the same time, major manufacturers in the FTTH industry chain have also increased their investment and made preparations for the final sprint before large-scale construction.Recently, the reporter interviewed Xu Zhicheng, Marketing Director of ZTE Cable Products, Wang Jianli, Deputy Chief Engineer of FiberHome Technology, Xu Jianguo, Vice President of Corning Optical Cable System, and Hu Baomin, Technical Manager of Changguang Technology, several industry experts on the hot issues of the development of the FTTH industry. people to share.Wang Jianli: The construction and application of FTTH and ADSL are mainly divided according to different regions.For high-end users and new houses, it is more reasonable to install FTTH directly. Although the installation cost of FTTH is higher than that of ADSL in the short term, FTTH has more advantages in the long run because the cost of optical fiber is lower than that of copper, and it is also conducive to environmental protection.Of course, for areas where a large number of copper cables have been laid, it is more practical to use the FTTN+ADSL mode in order to reasonably apply resources. With the increase in broadband demand, this mode can also evolve to FTTH.The first is the landing of FTTH content.FTTH construction is divided into hardware construction and content provision. The hardware construction in the early stage is largely driven by the follow-up of the content in the later stage, because the provision of the content in the later stage is directly related to the recovery of the construction cost in the early stage.Since the elements such as IPTV that can support FTTH post-content provision are not yet clear, telecom operators' FTTH construction in the early stage is not too firm.Jianguo Xu: From Corning's point of view, the price reduction space for PON passive equipment is relatively small, and most of the price reduction space should be for active equipment such as optical modules.Reducing the cost of these active devices requires more planning support from the state. FTTH belongs to the infrastructure of telecommunication equipment, and the large-scale procurement brought by the state's large-scale planning will reduce the production cost of these devices.For example, in Korea, where FTTH is well promoted, building construction must be linked to FTTH laying, and such policies have actively promoted FTTH construction.Wang Jianli: According to the analysis of Wei Leping, chief engineer of telecommunications, foreign FTTH construction costs mainly come from labor costs, and due to the low labor costs in China, China's FTTH costs mainly come from a large number of device modules required by ONUs, so reducing domestic FTTH construction costs mainly lies in the cost of components. reduce.In addition, in many large and medium-sized cities in China, 70%-80% of the households are less than two kilometers from the telecommunication bureau to the home. Therefore, when building GEPON in China, it is not necessary to use the 20-kilometer transmission distance standard. Using power devices, a certain amount of power devices can be appropriately reduced according to the specific situation, which is also a method to reduce the cost of FTTH.Xu Zhicheng: ZTE's understanding of FTTx optical access is not limited to EPON technology itself, but focuses on the access bearer of the entire access layer network.From NGN-oriented integrated access and DSLAM based on copper wires, to EPON single-board hybrid insertion of integrated access or DSLAM, to a unified optical access platform integrating MSTP, EPON, GPON and other technologies, ZTE's ZXA10 It is the basis for realizing a unified platform.In addition, the network topology structure of EPON and GPON is the same, and the temporary dispute will not hinder the application of technology.Wang Jianli: At present, the equipment of manufacturers has a variety of access technologies, and different boards can support technologies such as ADSL (DSLM), EPON and GPON.This kind of multi-mode equipment is very meaningful. At present, the DSLM card is used first, and the board card can be changed at any time according to the needs of the EPON.The evolution of new technologies has a process, and it is very important to support the transitional technologies in the early stage.Wang Jianli: EPON is based on Ethernet, supports IP, the cost is relatively low, the technology is more mature, and it has been applied on a large scale.Although GPON technology and equipment have advantages in transmission capacity, rate flexibility and split ratio, OAM functions and protection are relatively complete, and support TDM service bearing, but the technical implementation is complex, the industry chain is incomplete, and it is not yet ready for large-scale commercial use. ability.If it is fiber to the home, EPON is obviously more suitable.Hu Baomin: In terms of achievable services, GPON and EPON can replace each other at present, so it is not meaningful to discuss the business gap caused by the difference between EPON and GPON technology.In terms of standards, China's EPON standard has been quite perfect, and the EPON interoperability test standard has also passed, and the GPON standard is being submitted for review.In terms of cost, the gap between EPON and GPON is relatively large, and the cost of GPON is relatively high. It is estimated that the current transaction price of GPON is at least twice that of EPON.In terms of mature products, domestic EPON equipment has begun to use mature chips, while GPON currently has fewer mature chips.Hu Baomin: IPTV can indeed drive the initial construction of FTTH, but it is only the initial pull point.With the transition from IPTV to VOD on-demand in the form of multicast in the later period, the demand for bandwidth will further increase. This demand can only be met by FTTH.Wang Jianli: At present, domestic FTTH is still in the commercial trial stage. As of 2006, it is estimated that 30,000-40,000 households of FTTH have actually been put into commercial use.FTTH will have great development in 2007, because China Telecom has held EPON equipment interoperability test in March this year, Fiberhome has achieved satisfactory results as a benchmark manufacturer.And China Telecom's EPON centralized procurement is also underway, and China Netcom has also started EPON testing.All these information indicate that the scale construction of domestic FTTH is about to start.It is estimated that before 2010, FTTH users will account for 5% of broadband users.Xu Jianguo: Only in terms of the number of FTTH installations, China reaching 1 million users is a sign of a large-scale application.However, the outbreak period of FTTH in China mainly depends on the content application level of FTTH. IPTV is only the primary application of FTTH. FTTH needs the support of extensive applications in commercial transactions. FTTH provides a good platform for these daily transactions. Improve the added value of FTTH laying products.At the same time, the extensive application of transactions also requires the support of government policies and the cultivation of the environment.Xu Zhicheng: FTTH is the inevitable development of access technology in the future.Manufacturers' networking technology will always be ahead of society's demand for bandwidth.ZTE's ZXA10MSAN system reserves abundant bandwidth resources for FTTH, and can directly add EPON/GPON functions to the integrated access platform to provide users with true "free speed access".ZXA10MSAN will also be integrated into LMDS/MMDS, WLAN, WIMAX, BLUETEETH and other wireless technical means, so as to achieve arbitrary integrated access and achieve the perfect combination of various access means.