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Re: 1000/1000


@craigfre wrote:

Just what I was told by the tech. According to the modem spec sheet it supports up to 1000 up. 


The tech misspoke. He meant 1000 down.

Expert

Re: 1000/1000

It supports up to 2 gigs up.. But you must remove ALL the docsis modems from the system as well as all cable tv boxes and dvr's and replace all the outside amplifiers to change the fwd reverse filters from 45 to 100 mHz

The ethernet connections are 1000/1000

Expert

Re: 1000/1000

The modem on lab connection with no docsis 3.0 devices and a 5-85 mHz reverse 100-1000 mHz forward system can run 10 gigs down and 2 gigs up.

 

that is on a node that is docsis 3.1 only and no existing nodes are 5-85 reverse, they're all 5-45 mHz reverse because 54-100 mHz is used for TV ch's 2-6, 95,96 and the 72-75 mhz forward tv box data modems.  there will only be 4, not 8 US channels.

Don't assume mfg's specs are real world operational parameters. You could see 5 DS channels and as long as one is the "other" modulation, you could have 1 gig DS. However with US and 4 channels, you'll only see a max of 50, maybe 100 meg US, and that's due to crappy coax connections on the node, forcing modems to use Qam 16/64, not qam 256 US mod.

BTW, the 3.1 modems also have spec'd 5 dB more upstream power to blast thru bad connections and excess splitters. Which really need to be removed.   They can do +57 dBmv on 4 to 8 US channels and +65 dBmv if modem falls back to partial service on a single US channel.  Again throwing modems at a coax issue

 

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Re: 1000/1000

Are they not using the 192mhz OFDM channels? I cant sign into my modem for some reason to check.

Expert

Re: 1000/1000

3.1 Will not fix upstream.. those are the existing 4  17-45 mHz reverse channels from docsis 3.0.

The 192 mhz upstream channel for 3.1 could be anywhere from 32 to 256 mHz wide and it's downstream only, and usually above the existing channels.