ASSIA Inc. is a developer of high-performance software tools, and its products are used for dynamic spectrum management (DSM) of digital subscriber circuit (DSL) networks. The company recently announced that it is launching licenses for important patents for DSL Phantom Mode Technology. The DSL phantom mode has greatly improved the speed of providing DSL services on multiple pairs of copper wires.
Dr. John Cioffi, Chairman and CEO of ASSIA, said: "The recently launched phantom mode products advertise that its speed exceeds 800 Mbps, which proves the importance of this technology developed by ASSIA many years ago." Including Alcatel-Lucent, Ericsson, Large DSL suppliers including Huawei and Nokia Siemens Networks have recently demonstrated or launched phantom mode products.
DSL usually sends electrical signals to users' residences through a pair of wires. "Bundling" processing technology that sends separate signals to users' residences through multiple pairs of wires can increase the speed of DSL. Phantom mode not only sends individual signals through each pair of wires, but also sends signals between each pair, thus taking another step. Therefore, the data transmission rate of two pairs of wires in phantom mode is three to four times that of a pair of wires, and only binding two pairs of wires can only double the data transmission rate.
The key invention of ASSIA's realization of phantom mode communication is that the DSL modem distinguishes phantom communication signals and phantoms from the useless crosstalk caused by electromagnetic (radio) coupling between pairs of wires. The inventors of ASSIA found that crosstalk can be eliminated by applying vector technology, thereby achieving phantom mode communication.
The employees of ASSIA first reported the basic concept of applying vector technology to phantom mode transmission in an award-winning scientific paper as early as 2004, and ASSIA has obtained patents on this invention from the United States and other countries. ASSIA's solutions are now widely adopted by the industry. As the product marketing director of a large supplier said, "(Phantom mode) solution can eliminate crosstalk, so we applied DSL vector technology."
Cioffi said: "ASSIA looks forward to working with licensed and to-be-licensed DSL chip and equipment suppliers to achieve the success of the phantom model. ASSIA is committed to ensuring that the technology provides the best performance and that ASSIA's inventions can continue to be Adopted. "
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