Wifi drops despite 3+ technician visits...

Question

&nbsp;I'm experiencing an intermittent connection error which drops all connections for all computers, even with some computers disconnected it appears to still have the same effect. It's not specific to one NIC erroring. I'm providing all of the troubleshooting information I can in the hopes that anybody is able to help me pinpoint what's causing these issues.This is what my outage chart for a typical day looks like, the unpredictable outages are making WFH next to impossible.&nbsp;And here's the corresponding router logs and upstream/downstream. I've censored MAC addresses for obvious reasons.Downstream bonded channelsChannelFrequency (Hz)Power (dBmV)SNR (dB)ModulationChannel ID14110000003.740256 qam12419000000438256 qam234270000003.538256 qam344350000003.738256 qam454430000003.938256 qam564510000004.338256 qam674590000003.738256 qam78467000000440256 qam895390000005.540256 qam1710547000000540256 qam18115550000005.338256 qam19125630000005.438256 qam20135710000005.640256 qam21145790000005.940256 qam22155870000005.638256 qam23165950000005.540256 qam24176030000005.840256 qam25186110000005.340256 qam26196190000004.840256 qam27206270000004.538256 qam28216350000004.538256 qam29226430000004.538256 qam30236510000004.638256 qam31246590000004.840256 qam32Downstream bonded channels (Errors)ChannelLocked StatusRxMER (dB)Pre RS ErrorsPost RS Errors1Locked40.91789481962Locked38.9208103Locked38.9282204Locked38.93959615155Locked38.9502206Locked38.9536407Locked38.6618908Locked40.3591909Locked40.38065010Locked40.39107011Locked38.910969012Locked38.911129013Locked40.39693014Locked40.313570015Locked38.914993016Locked40.316597017Locked40.319217018Locked40.320616019Locked40.923114020Locked38.926679021Locked38.924552022Locked38.919794023Locked38.914352024Locked40.3104280Upstream bonded channelsChannelFrequency (Hz)Power (dBmV)Symbol Rate (ksps)ModulationChannel ID14960000046512064 qam123660000045.5512064 qam332360000044.8512032 qam543009996545.5512064 qam454310000045.3512064 qam2Upstream bonded channels (Timeouts)ChannelChannel TypeT1 TimeoutsT2 TimeoutsT3 TimeoutsT4 Timeouts1ATDMA00002ATDMA00003ATDMA00104ATDMA00105ATDMA0010Upstream bonded channels (Timeouts)ChannelChannel TypeT1 TimeoutsT2 TimeoutsT3 TimeoutsT4 Timeouts1ATDMA00002ATDMA00003ATDMA00104ATDMA00105ATDMA0010Log DataTimePriorityDescription05/05/2025 02:31:6criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;05/05/2025 02:22:29Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;05/05/2025 02:14:3criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;04/05/2025 22:38:17Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;04/05/2025 22:27:31criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;04/05/2025 21:53:17Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;04/05/2025 21:46:35criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;04/05/2025 18:53:17Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;04/05/2025 18:39:20criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

Tudor · Answer

Stats like that do indicate noise ingress and would definitely need a technician’s visit to correct.

The figures are accumulative since the hub was last power cycled. So please turn off your hub for a short period, this will reset the counters, then post a new full set of stats after about two hours. This will indicate the current line status.

carl_pearce · Answer

Missing downstream channels?

Matthew_ML · Answer

Hey tabate, thank you for reaching out and a warm welcome to the community, we are sorry to hear you are having some connection issues.
Let me send you a DM to find out what has been going on.

Forum Discussion

Wifi drops despite 3+ technician visits...

Downstream bonded channels

Downstream bonded channels (Errors)

Upstream bonded channels

Upstream bonded channels (Timeouts)

Upstream bonded channels (Timeouts)

Log Data

3 Replies

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Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1	411000000	3.7	40	256 qam	1
2	419000000	4	38	256 qam	2
3	427000000	3.5	38	256 qam	3
4	435000000	3.7	38	256 qam	4
5	443000000	3.9	38	256 qam	5
6	451000000	4.3	38	256 qam	6
7	459000000	3.7	38	256 qam	7
8	467000000	4	40	256 qam	8
9	539000000	5.5	40	256 qam	17
10	547000000	5	40	256 qam	18
11	555000000	5.3	38	256 qam	19
12	563000000	5.4	38	256 qam	20
13	571000000	5.6	40	256 qam	21
14	579000000	5.9	40	256 qam	22
15	587000000	5.6	38	256 qam	23
16	595000000	5.5	40	256 qam	24
17	603000000	5.8	40	256 qam	25
18	611000000	5.3	40	256 qam	26
19	619000000	4.8	40	256 qam	27
20	627000000	4.5	38	256 qam	28
21	635000000	4.5	38	256 qam	29
22	643000000	4.5	38	256 qam	30
23	651000000	4.6	38	256 qam	31
24	659000000	4.8	40	256 qam	32

Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1	Locked	40.9	1789	48196
2	Locked	38.9	2081	0
3	Locked	38.9	2822	0
4	Locked	38.9	3959	61515
5	Locked	38.9	5022	0
6	Locked	38.9	5364	0
7	Locked	38.6	6189	0
8	Locked	40.3	5919	0
9	Locked	40.3	8065	0
10	Locked	40.3	9107	0
11	Locked	38.9	10969	0
12	Locked	38.9	11129	0
13	Locked	40.3	9693	0
14	Locked	40.3	13570	0
15	Locked	38.9	14993	0
16	Locked	40.3	16597	0
17	Locked	40.3	19217	0
18	Locked	40.3	20616	0
19	Locked	40.9	23114	0
20	Locked	38.9	26679	0
21	Locked	38.9	24552	0
22	Locked	38.9	19794	0
23	Locked	38.9	14352	0
24	Locked	40.3	10428	0

Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
1	49600000	46	5120	64 qam	1
2	36600000	45.5	5120	64 qam	3
3	23600000	44.8	5120	32 qam	5
4	30099965	45.5	5120	64 qam	4
5	43100000	45.3	5120	64 qam	2

Time	Priority	Description
05/05/2025 02:31:6	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=:::::;CMTS-MAC=:::::;CM-QOS=1.1;CM-VER=3.0;
05/05/2025 02:22:29	Warning!	RCS Partial Service;CM-MAC=:::::;CMTS-MAC=:::::;CM-QOS=1.1;CM-VER=3.0;
05/05/2025 02:14:3	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=:::::;CMTS-MAC=:::::;CM-QOS=1.1;CM-VER=3.0;
04/05/2025 22:38:17	Warning!	RCS Partial Service;CM-MAC=:::::;CMTS-MAC=:::::;CM-QOS=1.1;CM-VER=3.0;
04/05/2025 22:27:31	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=:::::;CMTS-MAC=:::::;CM-QOS=1.1;CM-VER=3.0;
04/05/2025 21:53:17	Warning!	RCS Partial Service;CM-MAC=:::::;CMTS-MAC=:::::;CM-QOS=1.1;CM-VER=3.0;
04/05/2025 21:46:35	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=:::::;CMTS-MAC=:::::;CM-QOS=1.1;CM-VER=3.0;
04/05/2025 18:53:17	Warning!	RCS Partial Service;CM-MAC=:::::;CMTS-MAC=:::::;CM-QOS=1.1;CM-VER=3.0;
04/05/2025 18:39:20	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=:::::;CMTS-MAC=:::::;CM-QOS=1.1;CM-VER=3.0;

Channel	Channel Type	T3 Timeouts
1	ATDMA	0
2	ATDMA	0
3	ATDMA	1
4	ATDMA	1
5	ATDMA	1

Channel	Channel Type	T3 Timeouts
1	ATDMA	0
2	ATDMA	0
3	ATDMA	1
4	ATDMA	1
5	ATDMA	1