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View Full Version : 50M How many Downstream Channels should I have?


cdgilbert
11-04-2011, 19:35
Hi

I have had 50 mb for a year now and have never had problems.

Over the weekend my connection was up and down (LS16). This problem occured for someone else in my area too http://community.virginmedia.com/t5/Fibre-optic-broadband-cable/Problems-in-LS16/td-p/438657

The connection has now been restored but I now only have one Downstream channel (i has 3 before)

Cable Modem Operation Configuration
General Configuration
Network Access : Allowed
Maximum Number of CPEs : 1
Baseline Privacy : Enabled
DOCSIS Mode : DOCSIS 3.0
Config File : 7dsfd;kfoA,.iyewrkld
Primary Downstream Service Flow
SFID : 5422
Max Traffic Rate : 53000000 bps
Max Traffic Burst : 3044 bytes
Min Traffic Rate : 0 bps
Primary Upstream Service Flow
SFID : 5421
Max Traffic Rate : 5140000 bps
Max Traffic Burst : 8160 bytes
Min Traffic Rate : 0 bps
Max Concatenated Burst : 8160 bytes
Scheduling Type : Best Effort
 
 
Cable Modem Downstream
DS-1 DS-2 DS-3 DS-4
Frequency 322750000 N/A N/A N/A
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y N/N/N N/N/N N/N/N
Channel Id 121 N/A N/A N/A
Modulation 256QAM N/A N/A N/A
Symbol Rate
(Msym/sec) 6.952 N/A N/A N/A
Interleave Depth I=12
J=17 N/A N/A N/A
Power Level
(dBmV) 7.24 N/A N/A N/A
RxMER
(dB) 38.61 N/A N/A N/A
Correctable
Codewords 227 N/A N/A N/A
Uncorrectable
Codewords 306 N/A N/A N/A

Peter_
11-04-2011, 19:37
You have a fault and need to call the 50Mb Support line on 0800 052 0431 as you should not have one downstream on 50Mb.

cdgilbert
11-04-2011, 19:41
Thanks.

Will give them a call.

Skie
11-04-2011, 22:45
Out of pure curiosity, what speeds are you getting on speedtest.net?

cdgilbert
11-04-2011, 22:54
28meg. Was getting the full 50 before.

Skie
11-04-2011, 23:03
Cheers!

I'm going to annoy VM staff now and claim that means 4 channel capable kit can handle up to 112meg without any changes (and 8 channel kit 224meg) :)

Neo-Tech
11-04-2011, 23:04
If I remember correctly there was an outage in Leeds on Saturday morning, could be related.

I'm assuming you've tried the usual power on and off?

jb66
11-04-2011, 23:06
The modem could but the network couldn't handle it well

cdgilbert
11-04-2011, 23:14
Yeah rebooted a number of times. The other strange thing that is now happening is that it takes about 45 mins to establish a connection

error:

MDD message timeout;CM-MAC=00:22:68:f0:ee:b9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;

Neo-Tech
11-04-2011, 23:24
This might be worth a shot, login to the modem's GUI, click on Tools at the top and click Reset. On my old Ambit 256, I'd usually catch on to another channel.

cdgilbert
11-04-2011, 23:36
Sounds like a plan..
however I dont see any 'tools' option when I goto http://192.168.100.1/

Options are:-
•Information
•Status
•Downstream
•Upstream
•Upstream Burst
•Operation Config.
•Event Log

Thankks

Neo-Tech
12-04-2011, 00:08
It's right at the top of the page in the header in small writing.

cdgilbert
12-04-2011, 00:23
Thanks neo

Still cannot see it. Even looked at the source html of the page. Maybe it was removed in later versions?

Peter_
12-04-2011, 06:56
Cheers!

I'm going to annoy VM staff now and claim that means 4 channel capable kit can handle up to 112meg without any changes (and 8 channel kit 224meg) :)
He will have an unstable connection struggling to get a connection hence the requirement for a technician.

---------- Post added at 05:56 ---------- Previous post was at 05:55 ----------

This might be worth a shot, login to the modem's GUI, click on Tools at the top and click Reset. On my old Ambit 256, I'd usually catch on to another channel.
Not available on his modem VMNG300 ( MAC address tells me which model ) and reboot does the same.

Nopanic
12-04-2011, 08:32
Hi


Cable Modem Operation Configuration
General Configuration
Network Access : Allowed
Maximum Number of CPEs : 1
Baseline Privacy : Enabled
DOCSIS Mode : DOCSIS 3.0
Config File : 7dsfd;kfoA,.iyewrkld
Primary Downstream Service Flow
SFID : 5422
Max Traffic Rate : 53000000 bps
Max Traffic Burst : 3044 bytes
Min Traffic Rate : 0 bps
Primary Upstream Service Flow
SFID : 5421
Max Traffic Rate : 5140000 bps
Max Traffic Burst : 8160 bytes
Min Traffic Rate : 0 bps
Max Concatenated Burst : 8160 bytes
Scheduling Type : Best Effort
 
 
Cable Modem Downstream
DS-1 DS-2 DS-3 DS-4
Frequency 322750000 N/A N/A N/A
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y N/N/N N/N/N N/N/N
Channel Id 121 N/A N/A N/A
Modulation 256QAM N/A N/A N/A
Symbol Rate
(Msym/sec) 6.952 N/A N/A N/A
Interleave Depth I=12
J=17 N/A N/A N/A
Power Level
(dBmV) 7.24 N/A N/A N/A
RxMER
(dB) 38.61 N/A N/A N/A
Correctable
Codewords 227 N/A N/A N/A
Uncorrectable
Codewords 306 N/A N/A N/A

I'm the first to say networks isn't my thing .. but I see a 7.24 as a high power level on 50Mb ..

cdgilbert
12-04-2011, 08:58
It has sorted itself out over night. Now have 3 channels and full 50meg on speedtest.net

Thanks guys.

Peter_
12-04-2011, 10:05
I'm the first to say networks isn't my thing .. but I see a 7.24 as a high power level on 50Mb ..
With one channel it will look high.