Request to update sticky for 50Mb

[Billy-Bob]

There is a very useful sticky on this forum telling users the optimum parameters and tolerances for cable modems levels, but these do not appear to bear any resemblance to the figures reported by VM's 50Mb modem.
Could someone with a technical background maybe add a new sticky giving the modem levels for the 50Mb service please?

Ta.

[Pantsu-san]

I'd already requested this around 2 weeks ago in this thread but nobody wanted to help. Shame really as I'm getting very bored of reading "Please can somebody check my levels as I'm only getting 48.3Mb and I should be getting 50Mb when using Azereus".

I guess I'm just fooling myself into believing that people would actually pay attention to the stickies in the first place. Grumble.

[MovedGoalPosts]

As stated in that other thread, if the Cable Forum Team is advised of the current information we'd update the sticky thread. I assume therefore nobody has a definitive answer

[Billy-Bob]

Thanks guys. That'll teach me to search a bit harder before I post. Hopefully, someone who works for VM will let us all know what the values should be for the 50Mb modem sooner or later.

[pazor]

I dont think they know the correct levels prob just make them up !

Originally Posted by pazor

I dont think they know the correct levels prob just make them up !

Downstream - QAM256 are: +7 to -3 dBmV.
Upstream - Upstream signal levels should be between 35 and 54dBmV

[Peter_]

Here is a possible Sticky for 50Mb power levels across all platforms

Downstream

* Knowsley networks using QAM64 are: -7 to +3 dBmV.

* Knowsley networks using QAM256 are: -3 to +7 dBmV.

* Langley & Bromley networks using QAM64 are: -10 to 0 dBmV.

* Langley & Bromley networks using QAM256 are: -4 to +6 dBmV.


Upstream

* Upstream signal levels (from the modem) should be between 34 and
55dBmV.

Platform doesn't matter mate, just the modulation type. Good post.

[MovedGoalPosts]

I've merged the threads to make life easier

So which of you is correct, xocemp or Moldava? Perhaps it's just a typo in terms of the use of "+" or "-"

[Peter_]

Originally Posted by xocemp

Downstream - QAM256 are: +7 to -3 dBmV.

---------- Post added at 13:01 ---------- Previous post was at 13:00 ----------

Originally Posted by Moldova

* Knowsley networks using QAM256 are: -3 to +7 dBmV.

They are the same just laid out differently because Xocemp would have pointed it out already

[Billy-Bob]

How can I tell whether I am on Knowsley or Langley & Bromley?

[Peter_]

Go to this site and put your IP in the search bar and it will say here

http://www.db.ripe.net/whois?form_ty..._search=Search

Get your IP from the top of this page where it says connection

---------------------------

Your Platform will be shown here

inetnum:
netname:
descr: Platform ID will be here

[Billy-Bob]

Originally Posted by Moldova

Go to this site and put your IP in the search bar and it will say here

http://www.db.ripe.net/whois?form_ty..._search=Search

Get your IP from the top of this page where it says connection

---------------------------

Your Platform will be shown here

inetnum:
netname:
descr: Platform ID will be here

Thanks Moldova

Umm...it lists descr: NTL Infrastructure - Peterborough

Any ideas?

[Peter_]

Put your IP into here http://tools.virginmedia.com/ and click NSlookup then copy the Server IP address and repeat the NSlookup with that IP and it should say the Arpa name which should be either langley or bromley.

[Billy-Bob]

Originally Posted by Moldova

Put your IP into here http://tools.virginmedia.com/ and click NSlookup then copy the Server IP address and repeat the NSlookup with that IP and it should say the Arpa name which should be either langley or bromley.

Thanks.
That gives in-addr.arpa name = ns1-kno.blueyonder.net.
which I'm guessing is Knowsley? I'm a bit surprised by the blueyonder bit, as my area is ex-NTL, but I guess the networks have been chopped around somewhat since VM took over?