ntl home:120 hanging from today - Page 18

mcmanic · 28-01-2006, 11:47

not had a reset yet today (saturday), been downloading afew bits&bobs and all fine so far at 1.22mB/sec.

dare i speak to soon and all is well again! - we shall see

selene · 28-01-2006, 12:13

Well, my connection is still dropping every 30 minutes after reboot

I guess time to call NTL and see if I can get a new modem unless anyone has any advice they can give me? Can I just confirm that rebooting the CM really is just pulling out the power cable and nothing else? I hate calling Tech Support and try to avoid having to do so unless I really have no option... Also, how do I check what version of firmware I have?

bonnie2000 · 28-01-2006, 13:07

mines still dropping,its a lot better than it was but its still dropping

cb95amc · 28-01-2006, 13:19

Mine is also still hanging.....4 times this morning.

Ravantti · 28-01-2006, 13:39

Called CS last night 8pm, engineer has just left, new 250 modem all seems ok. Simple speed test shows 8 to 10 meg 9 as an avg so I am happy.

He said he has been told to replace all 120's with a 250 if any customers are on 10 meg. He said the 120 can't handle a full 10 meg. We'll see how it goes.

mcmanic · 28-01-2006, 13:50

Quote:

Originally Posted by Ravantti

He said the 120 can't handle a full 10 meg. We'll see how it goes.

lol, thats why mine runs at full 10meg then, BTW still no lockups, looks like its fixed at last

Rik · 28-01-2006, 15:00

Quote:

Originally Posted by Oven Chips

Rik,

I sent you a PM yesterday.

Peter

Oops
Didnt notice mate

Had too much of the Vino yesterday!

PM Sent

---------- Post added at 15:00 ---------- Previous post was at 14:31 ----------

Quote:

Originally Posted by Ravantti

He said the 120 can't handle a full 10 meg. We'll see how it goes.

Hmm thats interesting to hear, the first month or so i was on 10meg it was working fine

What i would really like is to know what happened and what is being done at the moment to the network, someone with the full sp would be nice, PM if need be, and im a techy for a living so please give me the tech details.

Oven Chips · 28-01-2006, 16:29

Quote:

Originally Posted by Rik

Oops
Didnt notice mate

Had too much of the Vino yesterday!

PM Sent

Hi Rik,

please can you recheck those levels you sent me and if they are the same or similar post them up.

I doubt that the modem should even work with those levels, and I'll quite happily explain them for the benefit of all.

Peter

mcmanic · 28-01-2006, 17:30

well so far so good, no problems today, downloaded everything i needed today 3.5gigs without a single problem

Rik · 28-01-2006, 20:03

Quote:

Originally Posted by Oven Chips

Hi Rik,

please can you recheck those levels you sent me and if they are the same or similar post them up.

I doubt that the modem should even work with those levels, and I'll quite happily explain them for the benefit of all.

Peter

I will do just as soon as im home.
Which should be in the next hour or so

Rik

---------- Post added at 20:03 ---------- Previous post was at 19:20 ----------

Got home

Rebooted CM just to start afresh so to speak and here are the readings reported.

I would love to know what each one is and what is should typically be please.
I love all the techy details

PS please note Peter there are two devices connected to the line, a CM and a STB connected with one of those splitter boxes.

Ive removed the splitter and just plugged cable directly into CM, and looked at settings and tbh theres only a few dB difference.

Oven Chips · 28-01-2006, 21:13

Well up front I will say that I am astonished that your modem works at all. I've worked on ntl: BB for 6 years now and have never seen anything even close to being as bad as those readings!

Downstream -22.72 dB. The spec is + or - 15. -10 is borderline and I think ntl: start thinking about sending out an engineer at -6dB. On its own this level should kill your connection with frequent disconections. The splitter you removed would have made this 3dB even lower.

(I know we tested the modems to -22dB in the lab a few years back, but we didn't actually expect them to do anything at that level.)

SNR 28.12dB. This is the best of the bunch but above 30dB is preferred.

Upstream 61dB this is the maximum output from a 120 modem. At this point it is "screaming" back at the network and as a result the signal is clipped and distorted. Again, on its own this level should kill your connection with frequent disconnections.

Conclusion - Forget firmware. It looks like* you have a serious physical connectivity problem. Because the downstream is low and the upstream is high the connection must be pretty close to open circuit. Its certainly high impedance.

(*An alternative could be that the modem power level measurement hardware is fried I suppose).

There is a really good Article on this at http://www.chetnet.co.uk/articles/in...x_v2&id=42&c=7 although it has my name as the author it was written by Bomber. I just added the footer.

Peter

Rik · 28-01-2006, 22:36

Quote:

Originally Posted by Oven Chips

Well up front I will say that I am astonished that your modem works at all. I've worked on ntl: BB for 6 years now and have never seen anything even close to being as bad as those readings!

Downstream -22.72 dB. The spec is + or - 15. -10 is borderline and I think ntl: start thinking about sending out an engineer at -6dB. On its own this level should kill your connection with frequent disconections. The splitter you removed would have made this 3dB even lower.

(I know we tested the modems to -22dB in the lab a few years back, but we didn't actually expect them to do anything at that level.)

SNR 28.12dB. This is the best of the bunch but above 30dB is preferred.

Upstream 61dB this is the maximum output from a 120 modem. At this point it is "screaming" back at the network and as a result the signal is clipped and distorted. Again, on its own this level should kill your connection with frequent disconnections.

Conclusion - Forget firmware. It looks like* you have a serious physical connectivity problem. Because the downstream is low and the upstream is high the connection must be pretty close to open circuit. Its certainly high impedance.

(*An alternative could be that the modem power level measurement hardware is fried I suppose).

There is a really good Article on this at http://www.chetnet.co.uk/articles/in...x_v2&id=42&c=7 although it has my name as the author it was written by Bomber. I just added the footer.

Peter

Hmm guess i better get on the phone then to TS Monday

Many Thanks for the Info Peter, its certainly opened my eyes!!

Oven Chips · 28-01-2006, 22:52

Quote:

Originally Posted by Rik

Hmm guess i better get on the phone then to TS Monday

Many Thanks for the Info Peter, its certainly opened my eyes!!

No probs!

TSB is open till midnight tonight and 08:00 to 00:00 tomorrow, so you don't have to wait till Monday. Its 0845 650 0121

Peter

Rik · 28-01-2006, 23:07

Quote:

Originally Posted by Oven Chips

No probs!

TSB is open till midnight tonight and 08:00 to 00:00 tomorrow, so you don't have to wait till Monday. Its 0845 650 0121

Peter

Many Many Thanks Peter!

What a jolly helpful nice man everyone!!

And just to show you it is working (downloading anyway) ive attached a nice screeny for you all

phunkymunky · 29-01-2006, 08:21

Been keeping an eye on this thread now for while, been suffering the same problems as everyone else for too long.
Eventually gave in an rang up TS and got an engineer out the next day. As mentioned before, he said the 120's just can't cope with the 10mbit and replaced it with a 250. That's been almost a week now and not one drop, back to normal \o/