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Hello all, quick Q. regarding upstream modulations.
I've heard that if you can only get QPSK then there are upstream issues in that area, I've been on QPSK for most of the the time but recently noticed that I was on QAM16. When It was QAM16 the service was improved but this only lasted a few days and now it's back to QPSK.
Sometimes if I repeatatively reboot the modem I can get QAM16 but as I said only sometimes.
Should I phone VM and report this or will they just say my connection is fine and say that there's nothing they can do?
The Advanced Spectrum Management has had to kick in and downgrade the upstream to QPSK as the network is currently not able to support 16QAM in that area. "
Mines the same
Upstream Modulation : QPSK
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 53.5 dBmV
Upstream Mini-Slot Size : 2
Not had any trouble other than last year when i couldnt host mw2 games but i might have been on QAM then
I pretty much can't host anything online unless I host just one or two people that are on a UK adsl connection. when my US modulation was QAM16 recently I was able to host upto 12 players regardless of connection type and location. Online play was very smooth in general even if I wasn't host and I could even connect well to players from Mexico. Atm I am unable to play online again.
As was mentioned earlier in this thread, if you can't get QAM then there's an upstream issue in your area, I would like this issue resolved if possible please.
Here's a few local pingtest results if it helps matters
Last edited by Harlow CM20; 25-08-2010 at 11:52.
Reason: added results from pingtest.net
Well, I phoned VM yesterday to speak about this and all they were willing to do was send round "another" tech. I've roughly had 10 VM techs to my property for power level problems amongst other things in the last 18 months. Had 3 visits since May 2010 and all say that everythings as good as it could possibly get.
Why must I suffer with poor performance and a B class connection that turns into an F class connection as soon as distance becomes a factor?
I would like someone to look into this as I believe there must be a problem elsewhere.
Also, one last question, does the VM 50Mb service use QPSK or QAM16 for upstream modulation
Join CF
You are here: 
so I don't care.
