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Originally Posted by Escapee
Thats a very good description Tristan, I don't work for ntl either but would just like to add that the VOD kit feeding the Nodal cabinets will be located in the current "Hubsites" The VOD streams will probably use DWDM technology to combine with the existing Analogue/Digital Tv and cable modem downstream. The current TV and cable modem services are fed to an optical transmitter (DFB) to feed generally 4 nodes in a ring of 8, the output of the DFB in the original architecture fed a 4 way optical splitter, the DWDM diplexer to add in the VOD service would be located between the DFB and optical splitter. It is likely they will follow a similar route as they did with cable modems, ie: use the existing architecture and further split down nodal areas as and when demand for the service increased. (The 4 way optical split could become a 2 way, and double up on DFB's for existing services etc or use a 2 way split to feed a 4 way with 2 DWDM's) The optical receiver at the node location has a photodiode that converts the RF modulated optical signal back to RF, because this is a wideband device it has the capability of accepting the different wavelenghts and demodulating them to their original frequencies.
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You're just showing off now. Hands up who got that. Is it even English?!
