NEC and TI in joint VDSL modem bid

NEC and TI in joint VDSL modem bid
Richard Ball NEC and Texas Instruments are co-developing chips and modules for very high bit rate digital subscriber line (VDSL) modems. The companies expect VDSL to be deployed at the end of fibre optic cabling systems such as fibre-to-the-curb. Expected applications for VDSL include multi-channel video-on-demand, teleworking, telemedicine and home shopping. These all have a video element, which NEC says is critical. “The speed of VDSL is ten times higher than ADSL. For the video applications, VDSL speed should be required,” said an NEC spokesperson. Both firms claim they will start field trials of the system this year. For VDSL, transmission speed is selectable in steps of 64kbit/s up to 52Mbit/s downstream – from the fibre to the user. Upstream, the rate is reduced to 6.4Mbit/s. A symmetric mode is also available offering 26Mbit/s in each direction.


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