ADSL in line with the development of new technology, ADSL2/2 ADSL has lots of advantages, operators may help solve a number of problems met in ADSL network operators, especially ADSL2/2 inside the transmission code modulation, employing a lot of new technology. This has made ADSL2/2 has a broad application prospects in the foreseeable future market.
(1)The transmission performance is really a lot improved
The comparison ADSL8Mbit/s the very best rate, the very best rate of ADSL2 approximately 12Mbit/s. The initial generation of ADSL downstream rate with a minimum of 6Mb/s uplink rates are at the very least 640kb/s; while G. The 992.3 standard ADSL2 rate of more stringent requirements, should a minimum of support the downstream 8Mb/s, upstream of 800kb/s rate. ADSL2 power to adapt to poor line environment has become improved to a certain extent, especially in the longer distance, bridge joints, the truth of RF interference, the transmission performance has been further improved. Thus, before, as a result of line quality and may not benefit from the ADSL service users can also open ADSL. Based on the AD a2 SL, within the same transmission distance can be purchased, ADSL2 50kbps rate of increase;, ADSL2 can extend the transmission distance of 183 m underneath the same transmission rate. Transmission performance improvement is principally due to the following core technologies.
(2)Dynamically adjust the power saving mode
The first generation ADSL transceiver whether within the data transfer useage state, the energy is usually precisely the same, the ADSL2 standard is introduced in the two power management mode, saving the energy consumption inside the and keep ADSLalwayson characteristics. L2 low power mode according to Internet traffic, quickly back or leave L0 full-power mode, lowering the overall power loss. L3 low-power mode every time a certain time frame there is absolutely no flow, ATU-C and ATU-R may be applied for the sleep mode L3. ADSL2 the roll-out of two new state (L2 low power mode, L3 low-power mode), the transceiver in low data rate or bandwith into hibernation, and will reduce the power consumption for central equipment for your office, also slow up the cooling requirements for solving the monthly subscription product is now widely used in long line or central equipment for your office power consumption may be online cause too big of great significance. By way of example, once the user to download a substantial file, ADSL2 work in L0 full power mode, to get the greatest download speeds; when Internet traffic is reduced, like reading a protracted page of text, then download rate reduce, ADSL2 system into L2 low power mode. In line with the modifications in the flow rate, in L2 ADSL2 system can easily resume the L0 mode, or in just a certain time, if there is no flow, then this system will enter in the L3 sleep mode. Once the user re-online, the device takes about 3s time and energy to re-initialize, enter a reliable state of communication.
(3)Segmentation with the channel management
ADSL2 support bandwidth is divided into different channels, for them to adapt to different applications have different characteristics, for example ADSL2 support voice applications then it gets the characteristics of low-latency, high fault tolerance, while supporting the other a knowledge application of a channel, in order that it can tolerate a rather large delay, along with the error rate is minimal. This letter Tao from the management of the properties to ADSL2 supports CVoDSL (Channelized Voice-over DSL) TDM-based 64kbit/s of digitized voice letter Road for that user, and the do not have the voice carrying on the ATM or IP as well as other high-level protocols and applications. Meanwhile, ADSL2 enhanced online re-configuration functions, support of numerous channels of dynamic rate allocation, seamless rate adaptation; enhanced spectrum control function, support for single-carrier template; enhanced power control function, central office and remote support power down; optional initialization sequence, supporting rapid error recovery, helps make the initialization time reduced from 10s to 3s.
In addition for the above mentioned features, ADSL2 even offers real-time performance monitoring, modem initialization process standardization, interoperability ability, ramp up feature. Fiberstore offers several types of Fiber Optic Tester and ADSL Tester is one. The most popular used ADSL Tester is ADSL2 Tester. It becomes an easy-to-use, hand-held advanced telecommunication tester that employed for mobile phone, maintenance and measurement of ADSL2 service. It props up the testing function including parameter, error, DMM, PING that in connection with ADSL2 service, user register authentication about the ADSL2 user line side. What’s more, it directly enables the engineers to confirm, troubleshoot and appraise the ADSL2 service. Oahu is the right tool for that network test job. Fiberstore offers a variety of ADSL2 Tester.