Comprehensive Description of Features of New ADSL2 + Access Technology

Currently, ADSL2 + access technology is widely used. We believe that with the development of the communication industry, ADSL2 + access technology will be more comprehensive and stable, bringing users a good network environment. The ADSL2 + Access Technology and 4bandVDSL access method launched by Huawei have the following features:

1. Unified broadband access platform. The ADSL2 + Access Technology and 4bandVDSL access method are directly introduced on the original DSLAM device, that is, the interface board compatible with other business board slots is provided on the original SmartAXDSLAM device, the original device can be flexibly configured based on the user's numbering requirements.

2. Unified management platform. Implements simple operations of new technologies on device applications. 3. unified test platform. This allows you to perform a unified test with the original DSLAM device without the need to configure it separately. Huawei's latest ADSL2 + Access Technology complies with ITU-TG.992.3ADSL2) and G.992.5ADSL2 +) standards. ADSL2/2 + adds some new features on the basis of the first-generation ADSL, and greatly improves the performance and functions. ADSL2 + access technology is developed based on ADSL2, and ADSL2 + Access Technology has all the features of ADSL2.

Higher speed: ADSL2 + uses a wider spectrum, with more than 512 sub-carriers). When the distance is short, the downlink speed can reach up to 24 Mb/s.

Longer access distance: applications with a distance close to 7km are supported. The speed can reach no less than kb/s for the downlink and no less than kb/s for the uplink.

More abundant chip-level line testing functions: SELTSingleEndLoopTest) can be used to test the line length, speed, and diameter in a single-ended manner. In the future, DELTDualEndLoopTest will be supported ), perform more accurate dual-end tests on line noise, loop attenuation and length, bridging head bridgetap), and reachable rate.

Lower power consumption: by reducing the transmission power, adding a low power consumption mode, and providing power management functions such as the powercutback function for CO and CPE, the device provides more low power consumption during stable operation.

Better interconnectivity: The ADSL Transceiver is divided into TPS-TC transmission protocol-related aggregation sub-layer according to the function), PMS-TC physical media-related aggregation sub-layer), PMD physical media-related sub-layer) and MPS-TC management protocol-related aggregation sub-layer, used for network management interface), each sub-layer is encapsulated and defines the message between the sub-layer, to help different manufacturers of devices to achieve interoperability.

More operating modes: full digital mode AnnexI compatible with ADSLoverPOTSannexA and ADSLoverISDNannexB) full digital mode compatible with spectrum J, the bandwidth of the narrowband voice service can be used to transmit upstream data.

More stable operation and better spectrum compatibility and line diagnosis functions. Huawei also introduced the 4bandVDSL access technology, which is based on the 4BAND band of the standard VDSL set forth in ITUG.993.1, the maximum access bandwidth provided by twisted pair wires within a range of less than 1.5 kilometers can reach a symmetric 25 Mbps, asymmetric 52/26 Mbps rate. In LONGREACHVDSLLRVDSL applications, the transmission rate can reach 4 Mbps/0.6Mbps within 3 kilometers, greatly expanding the application space of VDSL.