Two disconnections on 50mb

[Welshchris]

Both yesterday and today now ive had two disconnections.

When clicking on network and sharing center the connection between Router and PC is fine yet connection between router and net isnt and when u click fix it says cannot find DNS or DNS not responding.

The circular planet light on the router also goes from green to yellow.

Is this a router problem?

[moaningmags]

Try a direct connection and see.

[Welshchris]

Just happened again this time modem refused to lock back on...

Here is the modem event log....
MOD: Log removed due to CM-MAC

Here are the power levels....

Cable Modem Downstream
DS-1 DS-2 DS-3 DS-4
Frequency 299000000 307000000 315000000 323000000
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y
Channel Id 136 137 138 139
Modulation 256QAM 256QAM 256QAM 256QAM
Symbol Rate
(Msym/sec) 6.952 6.952 6.952 6.952
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level
(dBmV) 0.55 -0.18 0.29 0.51
RxMER
(dB) 37.36 37.36 37.36 37.94
Correctable
Codewords 12 19 25 21
Uncorrectable
Codewords 283 280 256 247


Cable Modem Upstream
US-1 US-2 US-3 US-4
Channel Type 1.0 N/A N/A N/A
Channel ID 1 N/A N/A N/A
Frequency
(Hz) 47400000 N/A N/A N/A
Ranging Status Success N/A N/A N/A
Modulation 16QAM N/A N/A N/A
Symbol Rate
(KSym/sec) 2560 N/A N/A N/A
Mini-Slot Size 2 N/A N/A N/A
Power Level
(dBmV) 50.50 N/A N/A N/A
T1 Timeouts 0
T2 Timeouts 0 0 0 0
T3 Timeouts 5 0 0 0
T4 Timeouts 0 0 0 0

---------- Post added at 20:01 ---------- Previous post was at 19:41 ----------

and again....

MOD:Log removed due to CM-MAC addresses
Cable Modem Downstream
DS-1 DS-2 DS-3 DS-4
Frequency 299000000 307000000 315000000 323000000
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y
Channel Id 136 137 138 139
Modulation 256QAM 256QAM 256QAM 256QAM
Symbol Rate
(Msym/sec) 6.952 6.952 6.952 6.952
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level
(dBmV) 6.10 5.72 5.95 5.96
RxMER
(dB) 37.36 37.64 37.94 37.94
Correctable
Codewords 0 2 4 7
Uncorrectable
Codewords 287 254 252 277


Channel Type 1.0 N/A N/A N/A
Channel ID 1 N/A N/A N/A
Frequency
(Hz) 47400000 N/A N/A N/A
Ranging Status Success N/A N/A N/A
Modulation 16QAM N/A N/A N/A
Symbol Rate
(KSym/sec) 2560 N/A N/A N/A
Mini-Slot Size 2 N/A N/A N/A
Power Level
(dBmV) 50.00 N/A N/A N/A
T1 Timeouts 0
T2 Timeouts 0 0 0 0
T3 Timeouts 55 0 0 0
T4 Timeouts 0 0 0 0

---------- Post added at 20:31 ---------- Previous post was at 20:01 ----------

50mb support just reset my modem and my upstream has greatly increased....

[Kymmy]

Chris, if needed please repost with the CM-MAC=XX:XX:XX:XX:XX removed from the logs if needed

[Welshchris]

Thanks Kymmy

[Sephiroth]

Doesn't look good. The T3 timeouts and fluctuating downstream power.

The latter could be local - that would have been my favourite except that your RxMER doesn't fluctuate with the power. I suppose there are conditions where it's not an impairment - perhaps an amplifier or common path distortion which would show as bad SNR at the CMTS.

Needs calling in IMO.

[Welshchris]

got a tech coming out Tuesday, apparently downstream is a little "To high" according to second line support.

But if its downstream why is the upstream whats causing the problems, from the own modem logs we can see upstream is the issue....

Fri Feb 5 19:54:36 2010 Fri Feb 5 19:54:36 2010 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel

This happened 3 times now.

[III]

Return path has always been a problem for you, this was the case when you were on 20Mbit on D3 what makes you think it would be any different on 50Mbit/D3?
Still you can have tech after tech, CEO call after CEO call, must break up the day for you.

[Welshchris]

Sephiroth its definately upload related....

I just did an upload of a file and it max's out at 161k which is around 1.3mb/s lower than what i should be getting. The only time i got what i should be is when support reset my modem and i was getting 1.58mb for a few hrs till the modem reset on its own accord again and went back to 1.33mb. Also from the modem logs of not being able to lockon to an upstream channel.

[Sephiroth]

I'd get the engineer (if he's the right sort) to test back to the cabinet, particularly the amplifiers. I'm not saying ot is the cause but it could need elimination from the equation.

[Ignitionnet]

Originally Posted by Sephiroth

I'd get the engineer (if he's the right sort) to test back to the cabinet, particularly the amplifiers. I'm not saying ot is the cause but it could need elimination from the equation.

Network techs don't do home calls, he won't be the right sort.

Proving out the RF network is easy enough, just check CMTS for issues from other modems in the postcode on the same equipment.

A more relevant question would be to work out why this happened:

Power Level (dBmV) 0.55 -0.18 0.29 0.51

Power Level (dBmV) 6.10 5.72 5.95 5.96

Both levels are fine, an unexplained swing like that is not, though it is an almost exactly 6dBmV swing and upstream power dropped by 0.5dBmV - consistent with removal of a 6dB forward path attenuator, the 0.5dBmV upstream change being insertion loss on the attenuator. If you removed an attenuator put it back and your power levels are nigh on perfect.

[Welshchris]

I dont have an Attenuator, i did have a 3dBmv but he took it off when he installed 50mb and said i didnt need and took it with him.

Second line support have stated two things.....
First stated it was a download signal as its up just on the edge of being ok.

Then when i pointed out the T3 Errors in the log they stated that the upstream was "A little High"...

Now the connection only tends to die really if its under stress for example, I reciently wiped and reloaded system to put on Windows 7 and im attempting to do a full download of all emails from a Googlemail address which is about 1.7GB worth of emails, now i cannot download emails and use the connection to browse at the same time as the connection will just stop as if its hit a brick wall and it will either recover after about 20 T3 Errors appear on the Modem settings or the modem will reboot and sometimes like the day before yesterday refused to lock back on and i had to ring support who reset my modem.

If it is the upstream thats the cause if its not right and is being saturated for some reason would it cause T3 errors and reboots?

Broadbandings i have been through this weird increase and decrease of signals with Virgin in the past.... Now last November they replaced my modem again which put me back onto the DOCSIS 1.0 network and upstream levels dropped from 53dBmv to around 48dBmv. Just after christmas for some reason the modem went back onto the docsis 1.1 network for no reason the only thing i can think of is network relief and the modem refused point blank to lock on and the level was 61dBmv. I rang support who reset the modem and the modem jumped over back to Docsis 1.0 and back to around 48dBmv and never had a problem since now until again upgrading to the BSR.

[Ignitionnet]

The upstream power is fine. The downstream power is fine. It moving suggests someone removed attenuation from somewhere.

The previous signal changes are not unexpected behaviour between the two networks and aren't an issue in this case, no other network to choose from.

You seem to have the exact same problems you did before - poor return path on the 47.4MHz channel. They can't move you to another channel as there just isn't one.

[Welshchris]

So what do u suggest?

[Ignitionnet]

Originally Posted by Welshchris

So what do u suggest?

Another ISP. I have.

It won't be long before you're enjoying O2 Home Broadband. So we thought we'd let you know the latest.

Your expected connection date is 11/02/10