Community Forum

CM1150V Provisioning after days of power / cable loss

Highlighted
New Poster

CM1150V Provisioning after days of power / cable loss

We lost our Internet and Power for multiple days and after it all came back ,  our 1Gbit Internet is not the same...  I just had an Xfinity tech out here - he checked the lines to my house -  there are no issues or latency / noice etc...  

 

When I check my Modem - I can tell one of the 32 downstream channels are not bonded - I think it should be for Docsis 3.1....  Can anyone confirm this for me?  I am also worried about the power level on a few of the downstream channels....  Not sure If I should call Xfinity back and have them check their network  -  We know now its not the line into my house on in my house..... 

 

Acquire Downstream Channel 681000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
IP Provisioning Mode Honor MDD honorMdd(4)
 
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 31 681000000 Hz -11.1 dBmV 35.9 dB 12 0
2 Locked QAM256 1 495000000 Hz -5.6 dBmV 38.8 dB 707 913
3 Locked QAM256 2 507000000 Hz -5.6 dBmV 38.9 dB 721 1404
4 Locked QAM256 3 513000000 Hz -5.8 dBmV 38.4 dB 946 1438
5 Locked QAM256 4 519000000 Hz -6 dBmV 38 dB 1021 1453
6 Locked QAM256 5 525000000 Hz -6.2 dBmV 37.6 dB 1102 1443
7 Locked QAM256 6 531000000 Hz -6.5 dBmV 37.2 dB 1102 1450
8 Locked QAM256 7 537000000 Hz -6.5 dBmV 37 dB 1063 1393
9 Locked QAM256 8 543000000 Hz -6.8 dBmV 36.9 dB 1093 1455
10 Locked QAM256 9 549000000 Hz -6.8 dBmV 36.9 dB 1174 1443
11 Locked QAM256 10 555000000 Hz -6.8 dBmV 36.9 dB 1229 1405
12 Locked QAM256 11 561000000 Hz -7.1 dBmV 36.8 dB 1306 1418
13 Locked QAM256 12 567000000 Hz -7.4 dBmV 36.7 dB 1308 1424
14 Locked QAM256 13 573000000 Hz -7.6 dBmV 36.6 dB 1294 1445
15 Locked QAM256 14 579000000 Hz -7.7 dBmV 36.5 dB 1271 968
16 Locked QAM256 15 585000000 Hz -7.9 dBmV 36.5 dB 1407 1430
17 Locked QAM256 16 591000000 Hz -8.1 dBmV 36.4 dB 1447 1453
18 Locked QAM256 17 597000000 Hz -8.2 dBmV 36.5 dB 1558 1460
19 Locked QAM256 18 603000000 Hz -8 dBmV 36.6 dB 1675 1473
20 Locked QAM256 19 609000000 Hz -8.3 dBmV 36.6 dB 1477 1475
21 Locked QAM256 20 615000000 Hz -8.6 dBmV 36.9 dB 1590 1389
22 Locked QAM256 21 621000000 Hz -8.8 dBmV 37.2 dB 1602 1408
23 Locked QAM256 22 627000000 Hz -8.7 dBmV 37.4 dB 1588 1380
24 Locked QAM256 23 633000000 Hz -8.8 dBmV 37.3 dB 1555 1349
25 Locked QAM256 24 639000000 Hz -9.3 dBmV 37 dB 1529 1361
26 Locked QAM256 25 645000000 Hz -9.8 dBmV 36.7 dB 1555 1374
27 Locked QAM256 26 651000000 Hz -10 dBmV 36.5 dB 1572 1382
28 Locked QAM256 27 657000000 Hz -10.3 dBmV 36.4 dB 1487 1347
29 Locked QAM256 28 663000000 Hz -10.4 dBmV 36.3 dB 1464 1375
30 Locked QAM256 29 669000000 Hz -10.6 dBmV 36.2 dB 1448 1359
31 Locked QAM256 30 675000000 Hz -10.9 dBmV 35 dB 1528 1380
32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
 
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 45 5120 Ksym/sec 36500000 Hz 44.3 dBmV
2 Locked ATDMA 46 5120 Ksym/sec 30100000 Hz 44.3 dBmV
3 Locked ATDMA 47 5120 Ksym/sec 23700000 Hz 44 dBmV
4 Locked ATDMA 48 5120 Ksym/sec 17300000 Hz 43.5 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
 
Downstream OFDM Channels
Channel Lock
Status
Modulation /
Profile ID
Channel
ID
Frequency Power SNR /
MER
Active Subcarrier
Number Range
Unerrored
Codewords
Correctable
Codewords
Uncorrectable
Codewords
1 Locked 0 33 693000000 Hz -10.9 dBmV 34.5 dB 1108 ~ 2987 243191071 113453558 0
2 Not Locked 0 0 0 Hz 0 dBmV 0.0 dB 0 ~ 4095 0 0 0
 
Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked 0 0 0 Hz 0 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV

 

Expert

Re: CM1150V Provisioning after days of power / cable loss

You only get one DOCSIS 3.1 / OFDM channel . That's all you need for gigabit setvice anywy.


I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
New Poster

Re: CM1150V Provisioning after days of power / cable loss

So that fact that channel 32 does not get bonded does not reflect anything?  It used to be and it shows bonded on other samples for the CM1150V on this site. 

Expert

Re: CM1150V Provisioning after days of power / cable loss

No. That bandwidth is now being used for something else.



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
Expert

Re: CM1150V Provisioning after days of power / cable loss

FWIW, the downstream power is a bit on the low / weak side and it may be intermittently fluctuating even lower to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, and speed and latency problems.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
New Poster

Re: CM1150V Provisioning after days of power / cable loss

Yes I can tell the downstream signals are low... Everything has been measured by Xfinity tech a few 

days ago onsite.  We have zero splitters - all connectors are fine - they measure everything from street to modem as clear.  But the signal and overall quality has gone down since last weeks power loss and cable outtage in our area.  Perhaps somewhere on the line - something broke down and has not yet been detected. 

 

But at least now I know channel 32 is not needed

Expert

Re: CM1150V Provisioning after days of power / cable loss

Get the techs re-involved until it is fixed properly ! Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home. Good luck with it !



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!