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ShadzGeeza
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Constant DC's

Hi, After years of connection problems i have pretty much had enough now with all this and am now at the point where ill have one last throw of the dice then i will be off too B.T. What makes it worse is the price of the broadband keeps going up but the connection quality gets no better and every time you come off the phone to support or when the engineer leaves you pretty much know you have been fobbed off because the solution to the problem will always be the same as the previous visit/call which never worked in the first place, so here goes, one last try.

As the title suggest i keep losing connection to games, can be every 30 seconds, every 5 minutes and so on, i check the router status and i am down to two out of eight upstream channels and there's constant T3 time outs. Engineers have been, pretty much everything from wall downstairs to the computer upstairs has been rewired, the connector on the junction box over the street has been replaced, cable attenuators put on, removed, replaced etc etc but still the same problems persist. It is so frustrating.

Cable Modem StatusItem Status Comments

Acquired Downstream Channel (Hz)
171000000
Locked
Ranged Upstream Channel (Hz)
60300087
Locked
Provisioning State
Online
 
 
Downstream bonded channelsChannel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
1171000000-1.937256 qam5
2139000000-0.737256 qam1
3147000000-137256 qam2
4155000000-1.437256 qam3
5163000000-1.737256 qam4
6179000000-2.237256 qam6
7187000000-2.237256 qam7
8195000000-2.537256 qam8
9203000000-2.537256 qam9
10211000000-2.937256 qam10
11219000000-3.237256 qam11
12227000000-3.537256 qam12
13235000000-3.937256 qam13
14243000000-437256 qam14
15251000000-437256 qam15
16259000000-4.237256 qam16
17267000000-4.437256 qam17
18275000000-4.537256 qam18
19283000000-4.737256 qam19
20291000000-4.537256 qam20
21299000000-3.937256 qam21
22307000000-3.237256 qam22
23315000000-338256 qam23
24323000000-2.938256 qam24

Downstream bonded channelsChannel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1Locked37.62650
2Locked37.62387
3Locked37.62830
4Locked37.61932
5Locked37.62130
6Locked37.61002587
7Locked37.620036
8Locked38.61222
9Locked37.61823
10Locked37.61020
11Locked38.61218
12Locked37.61118
13Locked37.6622
14Locked37.6822
15Locked37.6827
16Locked37.6627
17Locked37.61226
18Locked37.6729
19Locked37.61065
20Locked38.6882
21Locked37.6966
22Locked37.6993
23Locked38.61075
24Locked38.64121
Upstream bonded channels
Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
16030008749.5512064 qam1
Upstream bonded channelsChannel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
1ATDMA0010
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ShadzGeeza
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Re: Constant DC's

Network LogTime Priority Description
25/01/2021 16:15:3criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 16:15:3criticalUnicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 16:14:43criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 16:14:43criticalUnicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 16:14:23criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 16:14:23criticalUnicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 16:14:3criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 16:14:3criticalUnicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 16:03:14Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 16:02:46criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 15:27:0Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 15:25:26criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 15:15:27Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 14:15:50criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 14:06:29Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 14:06:29criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 14:06:6Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 14:05:39criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 12:40:45Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/01/2021 12:13:9criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
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carl_pearce
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Re: Constant DC's

You need an engineer visit to correct the line issue (Only one upstream channel when you should have two or four, depending on area).

Lots of errors in your network log confirming some kind of fault.

Whilst they are in the cabinet they should adjust your downstream power levels are they are a touch low.

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ShadzGeeza
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Message 4 of 15
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Re: Constant DC's

Thanks for the reply Carl, the last engineer that came did notice there were only 2 upstream channels to be fair and said something along the lines of its usually a problem at the junction box or something like that, He spent about 10 minutes at the junction box and told me he had replaced the connector as it looked like the original connector from when the junction box was installed. When the engineer left there were the full 8 upstream channels but now i'm back down to 2 and i have left the modem switched off for 15 minutes rebooted it time after time but still only get 2 upstream.

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ShadzGeeza
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Re: Constant DC's

On a side note there is currently a 4db attenuator on which i could remove for now to see if things get better.

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carl_pearce
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Re: Constant DC's


@ShadzGeeza wrote:

On a side note there is currently a 4db attenuator on which i could remove for now to see if things get better.


Try removing it and post the stats again.

4dB difference should bring the downstream power levels to a better level.

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ShadzGeeza
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Re: Constant DC's

Attenuator now off and i have all the upstream channels back for now, here are the results.

Downstream bonded channelsChannel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
11710000003.538256 qam5
21390000004.637256 qam1
31470000004.537256 qam2
41550000004.337256 qam3
51630000003.737256 qam4
61790000003.237256 qam6
7187000000337256 qam7
81950000002.738256 qam8
92030000002.438256 qam9
10211000000237256 qam10
112190000001.738256 qam11
122270000001.237256 qam12
13235000000137256 qam13
142430000000.737256 qam14
152510000000.737256 qam15
162590000000.738256 qam16
172670000000.538256 qam17
182750000000.438256 qam18
192830000000.238256 qam19
202910000000.438256 qam20
21299000000137256 qam21
223070000001.538256 qam22
233150000001.738256 qam23
243230000001.738256 qam24


Downstream bonded channelsChannel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
     
1Locked38.6270
2Locked37.3190
3Locked37.3280
4Locked37.6200
5Locked37.6290
6Locked37.6100
7Locked37.6120
8Locked38.6173
9Locked38.6120
10Locked37.6170
11Locked38.6110
12Locked37.3615
13Locked37.6180
14Locked37.6100
15Locked37.6926
16Locked38.6227
17Locked38.6180
18Locked38.6110
19Locked38.6180
20Locked38.61313
21Locked37.6280
22Locked38.6260
23Locked38.6320
24Locked38.6180
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ShadzGeeza
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Re: Constant DC's

Upstream bonded channelsChannel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
15369999845512064 qam2
23939998642.5512064 qam4
34620005843.5512064 qam3
46029998845512064 qam1


Upstream bonded channelsChannel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000
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carl_pearce
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Re: Constant DC's


@ShadzGeeza wrote:
Upstream bonded channelsChannel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
15369999845512064 qam2
23939998642.5512064 qam4
34620005843.5512064 qam3
46029998845512064 qam1


Upstream bonded channelsChannel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000

Your upstream channels are back, and power levels better!

Hows the connection?

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ShadzGeeza
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Message 10 of 15
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Re: Constant DC's

I'll give it a day or two to see how it goes, i suspect those upstream channels will vanish again soon though, very hard to stay optimistic at this point.

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