16QAM is used for better noise handling... it can get away with SNR being 6dB (4x) lower than QAM64. The trade off is it has 2/3s the bandwidth per hz.
DOCSIS 1 channels are used for legacy devices... like some older ADSG cable boxes and power supply status monitoring. -- If it's important, back it up... twice. Even 99.999% availability isn't enough sometimes.
Ah. Thanks for the info DrDrew. Funny you say DOCSIS 1 is for legacy devices, my DOCSIS 2.0 modem still uses a DOCSIS 1 upstream (although it did have DOCSIS 2.0 for a couple of days a week or 2 ago).
Ah. Thanks for the info DrDrew. Funny you say DOCSIS 1 is for legacy devices, my DOCSIS 2.0 modem still uses a DOCSIS 1 upstream (although it did have DOCSIS 2.0 for a couple of days a week or 2 ago).
DOCSIS 3 and 2 can still use DOCSIS 1 channels... why shouldn't they? It's all usable bandwidth.
It's just DOCSIS 1 devices can't use DOCSIS 2 channels. They're not able to tune to 6.4 Mhz wide channels or decode ABOVE 16QAM modulation.
Oh I understand all that, I just think it's amusing you used the term "legacy" when my modem (which I've had probably about 6 months now) is still using it.
