VDSL2 brought into the business process FTTx will gradually replace ADSL-VDSL2, FTTx, ADSL-communications industry
March 26 message from the end of 2009 to early 2010, China Telecom , China Mobile Organized a large-scale PON equipment Jicai, VDSL2 areas Jicai the first time. Analysts pointed out that, PON + VDSL2 will be the construction of model operators in the light of Copper strategy of building a mainstream model, and in the construction of the first half of this year are expected to more than one million lines. In the highly anticipated debut
VDSL2
Now, with the personal video, high-speed Internet games, IPTV And HD rapid spread of telecommunications services and development of fixed-line users for the growing bandwidth demand. Expected within the next 3-5 years, China's fixed network access bandwidth demand could reach 50Mbps.
With industry analysis, said in recent years, "Light of Copper" has been the goal of struggling carriers, three carriers were also carried out in the country a certain amount of PON layout. At present, for operators, FTTH or fiber to the desktop still need a very high cost. No large bandwidth, in the case of business needs, using PON + VDSL2 fiber-to-floor-building program is to balance the bandwidth, network conditions and costs are the best.
"Traditional ADSL2 + technology because of their limitations, it is difficult to provide 20Mbit / s over the downlink bandwidth, and VDSL2 access in 1Km distance to provide 50M ~ 100Mbit / s bandwidth access, therefore, VDSL2 technology become the mainstream alternative to ADSL2 + technology. "The person also said.
VDSL2 in the transformation of the challenges have been overcome
It is reported that the construction process in the VDSL2 network DSLAM equipment to upgrade the current approach is to transform the most cost-effective manner, which requires access to existing VDSL2 DSLAM equipment with the capacity, such as the bandwidth of the equipment slots, PON uplink and so on. It is understood that many operators have to support VDSL2 DSLAM equipment, board, and many of DSLAM equipment can also be converted into PON uplink, to accommodate the construction of model FTTx + VDSL2.
The same time, a significant increase in rate of VDSL2 line, access node bandwidth capacity must increase accordingly to adapt to future business development needs. Currently, some manufacturers Access equipment Has had the 10GEPON and 10GGPON uplink access capability.
Adaptive capacity in the device, in order to ensure that operators can quickly laying and construction, VDSL2 equipment needs of the user terminal type and coverage, have a good adaptive bandwidth capability, the mode requires the user to use the terminal type automatically adjusted.
VDSL2 and FTTx together into business processes
VDSL2 international standards by the IT UT finalized in 2006, China Telecom and China Unicom have also developed their own corporate standards, and organized a number of VDSL2 equipment testing, from test results to see the mainstream manufacturers have reached a commercial VDSL2 equipment requirements.
In the industry chain, Broadcom and other major chip manufacturers have iKnoas has launched a lower power consumption, more powerful next-generation VDSL2 chip set, Huawei , Alcatel-Lucent and other major broadband equipment manufacturers have also launched their own VDSL2 central office and terminal products.
In Network cable Road optimization, the current DSL line optimization technology has matured. It is reported that manufacturers Huawei DSL line optimization technology is able to automatically adjust the power spectrum of different lines to achieve maximum bandwidth of the whole bundle of lines; In addition, auto-sensing external environment can change dynamically adjust circuit parameters to ensure that video service clear and smooth.
Present, China Telecom in Guangdong, Jiangsu, more than 20 provinces, China Unicom in the provinces of Liaoning, Hebei and other provinces have been successfully tested more than 10 commercial VDSL2 technology, domestic commercial scale test of 10 million lines.
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