K

Tuesday, June 24th, 2025 2:46 AM

Constant internet dropouts, multiple tech visits

I have been a customer for over a year now, and i have never had a worse provider. 
you call and they blame it on the modem. 
Thing is, this is my 3rd xb8 modem, so they cant blame it on that anymore.
Every time i tell the tech, or support, that my upstream channels and downstream channels disappear, unbond, become not locked, power levels fluxuate constantly, they act like they dont know what i mean.
I am going crazy trouble shooting this myself, to the point the regional manager here gave me his number and was watching my modem for a month and he saw nothing except "weird signals"
its not ddos or anything.
The internet constantly disconnects, and when it does, my power levels drop, my channels become not locked.

Downstream
Channel Bonding Value
Channel ID
17
1
2
3
4
5
6
7
8
9
10
10
12
13
14
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
33
Lock Status
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Frequency
399 MHz
303 MHz
309 MHz
315 MHz
321 MHz
327 MHz
333 MHz
339 MHz
345 MHz
351 MHz
357 MHz
363 MHz
369 MHz
375 MHz
381 MHz
540000000
SNR
41.8 dB
41.8 dB
41.7 dB
41.7 dB
41.7 dB
41.9 dB
41.8 dB
40.6 dB
41.8 dB
41.8 dB
41.9 dB
42.0 dB
42.0 dB
41.9 dB
42.0 dB
41.6 dB
Power Level
0.7 dBmV
0.4 dBmV
0.4 dBmV
0.6 dBmV
0.5 dBmV
0.5 dBmV
0.6 dBmV
0.8 dBmV
0.5 dBmV
0.6 dBmV
0.7 dBmV
1.1 dBmV
1.1 dBmV
0.9 dBmV
1.0 dBmV
0.7 dBmV
Modulation
256 QAM
256 QAM
Unknown
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
Unknown
256 QAM
256 QAM
OFDM
Upstream
Channel Bonding Value
Channel ID
25
0
0
0
Lock Status
Locked
Frequency
35 MHz
Symbol Rate
5120
Power Level
36.3 dBmV
Modulation
QAM
Channel Type
ATDMA
CM Error Codewords
Channel ID
17
1
2
3
4
5
6
7
8
9
10
10
12
13
14
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Unerrored Codewords
1365093896
331257814
0
333126233
333331259
0
329040609
329146050
333521084
333629079
333720640
331088906
329537194
293789501
217934891
215713556
216919284
214644858
214555642
216843703
0
214857706
129474679
131721763
131737396
104749390
104791080
107042196
107128867
71884851
71944020
1365093896
Correctable Codewords
0
5839
0
16949
48244
55675
11951
14858
17637
16267
13505
14903
12256
37850
56386
31926
47261
37196
2766
2149
9399
26458
1206
1005
928
925
1186
1037
817
839
924
0
Uncorrectable Codewords
49700
8851
21767
55719
101888
75642
43642
55059
60316
52326
37853
48245
43741
103976
50737
5966
72541
71496
9441
4716
34777
75884
1019
815
787
837
971
867
815
840
876
49700

9 Messages

2 days ago

and here are stats about 30 minutes after posting earlier

Downstream
Channel Bonding Value
Channel ID
17
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
33
Lock Status
Locked
Locked
Frequency
399 MHz
540000000
SNR
41.9 dB
41.5 dB
Power Level
0.2 dBmV
0.1 dBmV
Modulation
256 QAM
OFDM
Upstream
Channel Bonding Value
Channel ID
25
0
0
0
Lock Status
Locked
Frequency
35 MHz
Symbol Rate
5120
Power Level
36.5 dBmV
Modulation
QAM
Channel Type
ATDMA
CM Error Codewords
Channel ID
17
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Unerrored Codewords
1446771054
433028581
426825634
0
428822216
420842735
416464407
416572448
420947750
395609257
395701887
393071575
391518832
355770136
279914508
277693347
280000419
277728736
277640001
279928277
280040219
277941865
216572098
223176239
218967016
191759385
191807786
194049224
198481837
159046237
159078541
1446771054
Correctable Codewords
1444781716
5839
9163
16949
48244
55675
0
14858
17637
16267
13505
14903
12256
37850
56386
31926
47261
37196
2766
2149
9399
26458
33184
16084
2356
2331
12095
16551
0
39401
41478
1444781716
Uncorrectable Codewords
165801
8851
21767
55719
101888
75642
43642
55059
60316
52326
37853
48245
43741
103976
50737
5966
72541
71496
9441
4716
34777
75884
80583
14472
5033
1764
1960
1805
67500
82549
66297
165801

Contributor

 • 

133 Messages

1 day ago

What is your DHCP lease time? I have had the same problems for a few months and looked and my ip4 lases time is around 2 hrs. so every two hrs. I lose connection.

(edited)

9 Messages

lease expires every 4 days

Contributor

 • 

133 Messages

Your lucky then as I get two hrs. at a time :( Sadly as they are doing upgrades in my area i am set at two hrs. Have you tried going to the chat bot and typing in agent? If you keep asking for an agent you will get an option for a callback which is normally an American and they can escalate your ticket to an engineer. Sadly the online response are by people in the Philippines who sadly get paid $10 a week for 40 hrs. work. My cousin married a woman he met from there and she has family working at a Comcast center.

9 Messages

1 day ago

im not sure why support instantly answers other peoples posts when theyre available to see, but they just ignore mine. 

Official Employee

 • 

1.4K Messages

 

Knees Please be reminded that sending unsolicited Direct Messages to an Official Employee of the Xfinity Community Forum, is a violation of Forum Guidelines. In the future we ask that you please find the most appropriate public board for your question type and post it there. If needed, we may invite you to send us a Direct Message. We will reach out to you via DM shortly.

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

Expert

 • 

111.3K Messages

11 hours ago

@Knees 

FWIW. IP lease times can not cause power level fluctuations and the unbonding of channels. This sounds like a line / connection quality problem. There are a fair number of uncorrected bit errors. There may be some spurious noise ingressing the line(s) somewhere. I would consider getting a tech visit to investigate this. Good luck !

Contributor

 • 

133 Messages

Sadly getting any accurate info by logging into an XB8 is hard. The connection is not secure and some times you see channels there and sometimes they are gone. It is sadly a hit or miss.

Expert

 • 

111.3K Messages

11 hours ago

Not sure what you mean by "not secure". The UI pages are on the LAN, which has a private, non-internet routable IP address. How is security a factor anyway ?

And seeing intermittent channels may be caused by the unbonding of channels due to a signal quality problem as stated.

(edited)

Contributor

 • 

133 Messages

@EG

I have had Xfinity for 23 years now at my house and the last year has been terrible as they run fiber and connect all the new nodes.​  then the nearly weekly scheduled maintenance outages and nothing changes.

Expert

 • 

111.3K Messages

11 hours ago

In all fairness, there may be a new firmware glitch with the XB8 that is causing channels not to appear intermittently. You do have some weak downstream channels there.

(edited)

Contributor

 • 

133 Messages

@EG​  Been through different software updates on the XB8 and on the latest and no fix. Many people have reported the problem over the past three upgrades and nothing gets fixed :(

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