Broadcom is developing combination ADSL/VDSL chips using the Discrete Multi-Tone (DMT) line code. Broadcom had previously been developing VDSL solutions based on QAM technology. The company said that for VDSL to evolve as a mainstream broadband technology, "it is imperative that the modulation debate end, and the industry move forward with an agreed upon standard." The company plans to introduce standards-compliant multi-port central office (CO) and customer premise DMT ADSL/VDSL chipsets. Broadcom will support interoperability with devices from a number of other DMT VDSL chipset and plans to facilitate current QAM-based systems based on its chips to DMT.
http://www.broadcom.com
- Companies offering QAM-based VDSL chipsets include Infineon Technologies and Metalink.
