Lucent Doubles DSL Channel Density.Lucent Technologies is using its chip design and network expertise to virtually rule the roost for DSL DSL in full Digital Subscriber Line Broadband digital communications connection that operates over standard copper telephone wires. It requires a DSL modem, which splits transmissions into two frequency bands: the lower frequencies for voice (ordinary network equipment. The company is set to release a DSL chip solution that is sure to set the competition scrambling. On May 1 Lucent announced its DSP16470 and T8440 codec. This system-on-chip DSL technology doubles the channel density for Asymmetrical Digital Subscriber Line See DSL. (communications, protocol) Digital Subscriber Line - (DSL, or Digital Subscriber Loop, xDSL - see below) A family of digital telecommunications protocols designed to allow high speed data communication over the existing copper telephone lines between end-users and (ADSL See DSL. ADSL - Asymmetric Digital Subscriber Line ) Internet access. Higher channel density on ADSL chips increases performance while minimizing the amount of space that chips occupy in network access equipment, which in turn lowers system and electronics costs. "With [this] solution, Lucent has leapfrogged the competition with an offer of unprecedented ADSL performance and cost benefits," says Kim Funasaki, an analyst with IDC Research. "While the rest of the market is offering, at best, four-channel solutions for the full rate ADSL market, Lucent has upped the ante, taking the technology to a substantially higher performance level while at the same time lowering the price per port." The latest in the company's WildWire family, Lucent's chipset can simultaneously process eight channels of ADSL transmission in any combination of G.DMT See DSL. , G.Lite, and/or ANSI (American National Standards Institute, New York, www.ansi.org) A membership organization founded in 1918 that coordinates the development of U.S. voluntary national standards in both the private and public sectors. It is the U.S. member body to ISO and IEC. T1413 Issue 2-based connections. It can also operate at a power level of less than 1.4 watts/channel, a low power level sustainable through all components in the Lucent reference design solution, from the twisted pair interface on one side of the line card to the UTOPIA interface on the other end. The WildWire Octal architecture also supports voice over ATM, riding over DSL, via the "fast path". Each of the eight channels supports two paths, an interleaved path of data and a fast path for voice. The chip set is capable of supporting channelized Refers to an architecture that transmits data in channels. It often refers to the 64 Kbps channels in T1 lines, which were originally developed to handle digitized voice streams (TDM). See TDM. voice, which is digital voice transmitted over a time division multiplexer fast path channel and delivered to a host via the TDM (Time Division Multiplexing) A technology that transmits multiple signals simultaneously over a single transmission path. Each lower-speed signal is time sliced into one high-speed transmission. port on the DSP16470 chip. While the projections for DSL deployment are glowing, service is still only narrowly available and fairly expensive (see related story on Motorola, page 14). While companies like Motorola are concentrating on OEM and end user solutions to lower costs, networking chip makers like Lucent see cost savings at the telco and ISP sides of the equation. |
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