4 Messages
Dropout issues due to Xfinity and modem?
Hello,
I’ve been having issues since moving into my new place. There are POE signal issues. Everything on our end is fine. Xfinity is being slow to fix it. I noticed the logs on my Arris S33 modem. I was hoping someone more knowledgeable could take a look. Thanks!
3
CMSTATUS:DS_Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz.
10/5/2024
17:26:21
3
CMSTATUS:US_Diplexer_Mode_Change:TLV-84.1, 5-42MHz.
10/5/2024
17:26:35
3
UCD invalid or channel unusable;CM-MAC=*MAC_ADDRESSES*;CMTS-MAC=*MAC_ADDRESSES*;CM-QOS=1.1;CM-VER=3.1;
31/12/1969
19:00:16
3
CMSTATUS:US_Diplexer_Mode_Change:Init, 5-42MHz.
31/12/1969
19:00:19
3
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=*MAC_ADDRESSES*;CMTS-MAC=*MAC_ADDRESSES*;CM-QOS=1.1;CM-VER=3.1;
31/12/1969
19:00:20
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-21.2, 258MHz.
31/12/1969
19:00:20
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-21.3, 1002MHz.
31/12/1969
19:00:21
3
CMSTATUS:US Diplexer_Mode_Change:TLV-21.1, 5-85MHz.
31/12/1969
19:00:34
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-84.2, 108MHz.
31/12/1969
19:00:34
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz.
10/5/2024
21:24:06
3
CMSTATUS:US Diplexer_Mode_Change:TLV-84.1, 5-42MHz.
10/5/2024
21:24:20
3
UCD invalid or channel unusable;CM-MAC=*MAC_ADDRESSES*;CMTS-MAC=*MAC_ADDRESSES*;CM-QOS=1.1;CM-VER=3.1;
31/12/1969
19:00:16
3
CMSTATUS:US Diplexer_Mode_Change:Init, 5-42MHz.
31/12/1969
19:00:19
3
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=*MAC_ADDRESSES*;CMTS-MAC=*MAC_ADDRESSES*;CM-QOS=1.1;CM-VER=3.1;
31/12/1969
19:00:20
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-21.2, 258MHz.
31/12/1969
19:00:20
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-21.3, 1002MHz.
31/12/1969
19:00:21
3
CMSTATUS:US Diplexer_Mode_Change:TLV-21.1, 5-85MHz.
31/12/1969
19:00:34
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-84.2, 108MHz.
31/12/1969
19:00:34
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz.
11/5/2024
20:24:50
3
CMSTATUS:US Diplexer_Mode_Change:TLV-84.1, 5-42MHz.
11/5/2024
20:25:04
3
UCD invalid or channel unusable;CM-MAC=*MAC_ADDRESSES*;CMTS-MAC=*MAC_ADDRESSES*;CM-QOS=1.1;CM-VER=3.1;
31/12/1969
19:00:16
3
CMSTATUS:US Diplexer_Mode_Change:Init, 5-42MHz.
31/12/1969
19:00:19
3
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=*MAC_ADDRESSES*;CMTS-MAC=*MAC_ADDRESSES*;CM-QOS=1.1;CM-VER=
3.1;
31/12/1969
19:00:21
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-21.2, 258MHz.
31/12/1969
19:00:22
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-21.3, 1002MHz.
31/12/1969
19:00:22
3
CMSTATUS:US Diplexer_Mode_Change:TLV-21.1, 5-85MHz.
31/12/1969
19:00:28
6
Honoring MDD; IP provisioning mode = IPv6
31/12/1969
19:00:36
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-84.2, 108MHz.
31/12/1969
19:00:36
3
CMSTATUS:DS Diplexer_Mode_Change_Ignored:TLV-84.3, 1002MHz.
12/5/2024
00:05:44
3
CMSTATUS:US Diplexer_Mode_Change:TLV-84.1, 5-42MHz.
12/5/2024
00:05:51
6
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=*MAC_ADDRESSES*;CMTS-MAC=*MAC_ADDRESSES*;CM-QOS=1.1;CM-VER=3.1;
12/5/2024
00:05:59
3
UCD invalid or channel unusable;CM-MAC=*MAC_ADDRESSES*;CMTS-MAC=*MAC_ADDRESSES*;CM-QOS=1.1;CM-VER=3.1;
EG
Expert
•
111.3K Messages
1 year ago
What do the modem's signal stats look like ? Please copy all of the text in its entirety of the *Downstream Power Levels*, the *SNR's* (Signal to Noise Ratios), and the *Upstream Power Level* numbers and paste them into your next post.
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EG
Expert
•
111.3K Messages
1 year ago
This may or may not be the root cause of the problem (YMMV) but it should be addressed regardless.
The downstream power is 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, speed, packet loss, latency problems, and the un-bonding of channels.
In an effort to try to obtain better connectivity / more wiggle room, check to see if there are 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 from Home Depot, Target, Wal-Mart, etc. Splitters should be swapped with known-to-be-good / new ones to test.
Also check the coax cable for any damage such as cuts, nicks, abrasions, kinks, sharp bends, etc.
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.
Good luck with it !
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EG
Expert
•
111.3K Messages
1 year ago
My pleasure ! Best of luck with whatever you decide !!
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user_vmb964
3 Messages
1 year ago
I am having the same issue with the same event log entries. In searching through these forums, I see a pattern: this is a common problem, eventually a tech ends up coming out (often several times), the issue seems to be outside of the home, and the thread goes quiet without a solution found.
Were you able to solve the problem in this case?
Based on searching through the Xfinity forums, I haven't found a single instance of this problem getting solved. I'm reluctant to repeat the same steps that others have gone through without resolution.
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