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Old 06-01-2012, 22:03   #257
Ignitionnet
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Join Date: Jun 2008
Location: Leeds, West Yorkshire
Age: 47
Posts: 13,995
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Re: Speed doubling?

Quote:
Originally Posted by qasdfdsaq View Post
Two and a half
The other one is for non-DOCSIS 2 CPE, probably older EMTAs.

Another thing they do is to use mixed mode channels, so a DOCSIS 1.1 modem will burst onto the channel at 16QAM, symbol rate 2.56Msym/s while a DOCSIS 2 or higher modem bursts at 64QAM, symbol rate 5.12Msym/s. The CMTS splits the modems between those that registered in each mode and changes the upstream type dynamically for their transmit periods.

---------- Post added at 21:03 ---------- Previous post was at 20:46 ----------

Quote:
Originally Posted by thenry View Post
ignition, your the daddy on all this so why the hell are you not upgraded? VM have their own plans as you say but with all the knowledge you've got which is probably down to you being out and about here there and everywhere surely you could pull strings?
Even if I worked for VM it would be in an engineering role and string pulling would be limited to discrete enquiries as to how things are going.

I should be upgraded but it was cocked up so it's late, it was taking ages anyway as VM had 3 months of work to do in this area and didn't start it until August, completing it in October if I remember.
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