Visitor
•
2 Messages
T3 Time-out
I have frequent T3 Timeouts during the day and it causes interruption in service. Based on other chats in the Forum, I believe I have an issue somewhere in the local neighborhood or outside my home. I have a Motorola MB8600 DOCSIS 3.1 Cable Modem
I read through this forum post and it seemed to reflect the same experience I’m having. https://forums.xfinity.com/conversations/your-home-network/mdd-timeout/621fa524aef5c36d133d413c
I leveraged some of the recommendations on troubleshooting and have eliminated all of the splitters within the house.
Below is a screenshot of my upstream and downstream connection
Downstream Bonded Channels
Channel |
Lock Status |
Modulation |
Channel ID |
Freq. (MHz) |
Pwr (dBmV) |
SNR (dB) |
Corrected |
Uncorrected |
1 |
Locked |
QAM256 |
32 |
573.0 |
11.3 |
42.3 |
0 |
0 |
2 |
Locked |
QAM256 |
17 |
477.0 |
10.0 |
42.1 |
0 |
0 |
3 |
Locked |
QAM256 |
18 |
483.0 |
9.4 |
41.9 |
0 |
0 |
4 |
Locked |
QAM256 |
19 |
489.0 |
9.4 |
41.8 |
0 |
0 |
5 |
Locked |
QAM256 |
20 |
495.0 |
10.1 |
42.2 |
0 |
0 |
6 |
Locked |
QAM256 |
21 |
507.0 |
9.9 |
42.1 |
0 |
0 |
7 |
Locked |
QAM256 |
22 |
513.0 |
9.6 |
41.9 |
0 |
0 |
8 |
Locked |
QAM256 |
23 |
519.0 |
9.7 |
41.9 |
0 |
0 |
9 |
Locked |
QAM256 |
24 |
525.0 |
9.7 |
41.9 |
0 |
0 |
10 |
Locked |
QAM256 |
25 |
531.0 |
10.1 |
42.0 |
0 |
0 |
11 |
Locked |
QAM256 |
26 |
537.0 |
10.5 |
42.3 |
0 |
0 |
12 |
Locked |
QAM256 |
27 |
543.0 |
10.5 |
42.2 |
0 |
0 |
13 |
Locked |
QAM256 |
28 |
549.0 |
10.8 |
42.2 |
0 |
0 |
14 |
Locked |
QAM256 |
29 |
555.0 |
10.6 |
42.1 |
0 |
0 |
15 |
Locked |
QAM256 |
30 |
561.0 |
11.0 |
42.2 |
0 |
0 |
16 |
Locked |
QAM256 |
31 |
567.0 |
11.5 |
42.5 |
0 |
0 |
17 |
Locked |
QAM256 |
33 |
579.0 |
11.6 |
42.3 |
0 |
0 |
18 |
Locked |
QAM256 |
34 |
585.0 |
11.7 |
42.4 |
0 |
0 |
19 |
Locked |
QAM256 |
35 |
591.0 |
11.6 |
42.4 |
0 |
0 |
20 |
Locked |
QAM256 |
36 |
597.0 |
11.6 |
42.3 |
0 |
0 |
21 |
Locked |
QAM256 |
37 |
603.0 |
11.7 |
42.4 |
0 |
0 |
22 |
Locked |
QAM256 |
38 |
609.0 |
11.3 |
42.1 |
0 |
0 |
23 |
Locked |
QAM256 |
39 |
615.0 |
11.7 |
42.3 |
0 |
0 |
24 |
Locked |
QAM256 |
40 |
621.0 |
12.0 |
42.4 |
0 |
0 |
25 |
Locked |
QAM256 |
41 |
627.0 |
11.8 |
42.4 |
0 |
0 |
26 |
Locked |
QAM256 |
42 |
633.0 |
11.9 |
42.3 |
0 |
0 |
27 |
Locked |
QAM256 |
43 |
639.0 |
12.1 |
42.4 |
0 |
0 |
28 |
Locked |
QAM256 |
44 |
645.0 |
11.7 |
42.2 |
0 |
0 |
29 |
Locked |
QAM256 |
45 |
651.0 |
11.9 |
42.2 |
0 |
0 |
30 |
Locked |
QAM256 |
46 |
657.0 |
11.9 |
42.1 |
0 |
0 |
31 |
Locked |
QAM256 |
47 |
663.0 |
12.3 |
42.5 |
0 |
0 |
32 |
Locked |
OFDM PLC |
48 |
722.0 |
13.6 |
41.8 |
2776673 |
0 |
My Modem shows an event log that looks like this every time I see a connection disruption.
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;;CM-QOS=1.1;CM-VER=3.1; |
No Ranging Response received - T3 time-out;CM-QOS=1.1;CM-VER=3.1; |
Honoring MDD; IP provisioning mode = IPv6 |
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-QOS=1.1;CM-VER=3.1; |
Accepted Solution
CCGina
Official Employee
•
800 Messages
3 years ago
Definitely! Thank you for letting us know you checked the coax too, @user_aa1a37 :)
Please send us a direct message, using the following instructions, and we'll get that technician visit scheduled for you:
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CCGina
Official Employee
•
800 Messages
3 years ago
Thank you so much for all the information @user_aa1a37, I'm sorry to hear that you're having this trouble!
Our brilliant Expert @EG gave a lot of troubleshooting tips in the post you linked:
Have you tried any of the steps outside of eliminating the splitters? If so, please let us know!
(edited)
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user_aa1a37
Visitor
•
2 Messages
3 years ago
I did. I don't have any splitters connected and I have not found any nicks in the coax. Any way to have a tech check? \
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