reply to cramer
Re: It's coming
said by cramer:That's risen to rough ~30Mbps / channel with current DOCSIS 2.0 upstream modulation profiles. All but the oldest modems support this technology, but operators have to contend with people who refuse to upgrade and the issues of noise in the plant.
Yes and no. There's a technology limit of ~10Mbps per channel.
Which is my point. As long as cable operators continue to live in the past (*cough*68 analog channels*cough* -- all of them broadcast in digital as well) and support well outdated hardware (DOCSIS 1.0), the limit is still 10M. Our brand new Arris D3 modem at the office... still uses a single TDMA D1 16QAM upstream channel.
reply to TelecomEng
Isn't most of the noise due to the frequency of the upstream channels being limited to the very low end of the spectrum where, among many other things, every internal combustion engine spark plug can cause interference? I thought that too had solutions with newer specifications.