Intermittent connection - SYNC Timing Synchronization failure and Lost MDD Timeout

Since July 18th, I have had intermittent internet connection. Bought a new router for troubleshooting. Disconnected all splitters, so the cable modem is connected to the Comcast feed. Had a Xfinity tech came. He found a filter was installed at the cable demarc box. He removed the filter and analyzed the signal quality. He identified a cut on the cable feed. He cut the affected cable segment and remade the connector. He also replaced some connectors at the cable demarc box. He then checked the signal quality from the cable feed. The signal quality was good. Unfortunately the internet connection kept dropping. It was worse from noon to 5 pm at a rate of 3-5 times per hour. In the evening, it dropped one time. No drop in connection from midnight to morning. On July 31st, I did a factory reset on the cable modem. Below is the latest cable signal quality and log, and the router log. Any suggestions are much appreciated.

Downstream

Bonding Channel Value

Channel ID

38

39

40

41

42

43

44

45

Frequency

645000000 Hz

651000000 Hz

657000000 Hz

663000000 Hz

669000000 Hz

675000000 Hz

681000000 Hz

687000000 Hz

Signal to Noise Ratio

35 dB

37 dB

36 dB

37 dB

Downstream Modulation

QAM256

Power Level

The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading

5 dBmV

4 dBmV

3 dBmV

4 dBmV

Upstream	Bonding Channel Value
Channel ID	33	36	35	34
Frequency	16300000 Hz	35600000 Hz	29200000 Hz	22800000 Hz
Ranging Service ID	13151	13151	13151	13151
Symbol Rate	5.120 Msym/sec	5.120 Msym/sec	5.120 Msym/sec	5.120 Msym/sec
Power Level	38 dBmV	40 dBmV	40 dBmV	39 dBmV
Upstream Modulation	[2] QPSK [1] 16QAM [3] 32QAM	[2] QPSK [1] 32QAM [3] 64QAM	[2] QPSK [1] 32QAM [3] 64QAM	[2] QPSK [1] 32QAM [3] 64QAM
Ranging Status	Success	Success	Success	Success

Signal Status (Codewords)	Bonding Channel Value
Channel ID	38	39	40	41	42	43	44	45
Total Unerrored Codewords	811586222	811568264	811562453	811540752	811502586	811358813	811353865	811191015
Total Correctable Codewords	986	888	858	902	2117	1385	1491	1036
Total Uncorrectable Codewords	73161	118881	116155	95952	111285	130723	106492	98006

Time	Priority	Code	Message
Aug 01 2024 12:53:15	6-Notice	N/A	MDD Recovery following MDD Loss;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:53:02	5-Warning	T202.0	Lost MDD Timeout;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:52:37	3-Critical	T05.0	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:51:46	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:51:37	6-Notice	N/A	MDD Recovery following MDD Loss;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:51:36	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:51:35	6-Notice	N/A	MDD Recovery following MDD Loss;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:51:35	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:50:30	5-Warning	T202.0	Lost MDD Timeout;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:50:06	3-Critical	T05.0	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:38:56	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:38:43	3-Critical	T05.0	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:33:08	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:32:54	3-Critical	T05.0	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:26:42	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:26:29	3-Critical	T05.0	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:13:16	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 12:13:03	3-Critical	T05.0	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 11:54:34	3-Critical	R02.0	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Aug 01 2024 11:54:20	3-Critical	T05.0	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;

TP-Link Router AX3000 Log showing WAN disconnection and re-connection.

2024-08-01 13:53:43 Led Controller INFO [1454] Start to run WAN1_ON

2024-08-01 13:53:43 Led Controller INFO [1454] Start to run WAN0_OFF

2024-08-01 13:53:43 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 13:53:13 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 13:53:13 Led Controller INFO [1454] Start to run WAN0_ON

2024-08-01 13:53:13 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 13:51:43 Led Controller INFO [1454] Start to run WAN1_ON

2024-08-01 13:51:43 Led Controller INFO [1454] Start to run WAN0_OFF

2024-08-01 13:51:43 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 13:50:42 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 13:50:42 Led Controller INFO [1454] Start to run WAN0_ON

2024-08-01 13:50:42 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 13:49:42 Led Controller INFO [1454] Start to run WAN1_ON

2024-08-01 13:49:42 Led Controller INFO [1454] Start to run WAN0_OFF

2024-08-01 13:49:42 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 13:49:12 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 13:49:12 Led Controller INFO [1454] Start to run WAN0_ON

2024-08-01 13:49:12 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 13:20:49 Led Controller INFO [1454] Start to run WAN1_ON

2024-08-01 13:20:49 Led Controller INFO [1454] Start to run WAN0_OFF

2024-08-01 13:20:49 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 13:20:19 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 13:20:19 Led Controller INFO [1454] Start to run WAN0_ON

2024-08-01 13:20:19 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 13:07:31 Led Controller INFO [1454] Start to run WAN1_ON

2024-08-01 13:07:31 Led Controller INFO [1454] Start to run WAN0_OFF

2024-08-01 13:07:31 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 13:07:01 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 13:07:01 Led Controller INFO [1454] Start to run WAN0_ON

2024-08-01 13:07:01 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 09:59:40 Led Controller INFO [1454] Start to run WAN1_ON

2024-08-01 09:59:40 Led Controller INFO [1454] Start to run WAN0_OFF

2024-08-01 09:59:40 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 09:58:26 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 09:58:26 Led Controller INFO [1454] Start to run WAN0_ON

2024-08-01 09:58:26 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 09:58:22 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 09:58:22 Led Controller INFO [1454] Start to run WAN0_OFF

2024-08-01 09:58:22 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 09:57:20 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 09:57:20 Led Controller INFO [1454] Start to run WAN0_ON

2024-08-01 09:57:20 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 09:57:18 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 09:57:18 Led Controller INFO [1454] Start to run WAN0_OFF

2024-08-01 09:57:18 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 09:57:12 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 09:57:12 Led Controller INFO [1454] Start to run WAN0_ON

2024-08-01 09:57:12 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 09:56:56 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 09:56:56 Led Controller INFO [1454] Start to run WAN0_OFF

2024-08-01 09:56:56 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 09:53:41 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 09:53:41 Led Controller INFO [1454] Start to run WAN0_ON

2024-08-01 09:53:41 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 09:21:33 Led Controller INFO [1454] Start to run WAN1_ON

2024-08-01 09:21:33 Led Controller INFO [1454] Start to run WAN0_OFF

2024-08-01 09:21:33 Led Controller INFO [1454] Start to run LAN_ON

2024-08-01 09:21:18 Led Controller INFO [1454] Start to run WAN1_OFF

2024-08-01 09:21:18 Led Controller INFO [1454] Start to run WAN0_ON

2024-08-01 09:21:18 Led Controller INFO [1454] Start to run LAN_ON

2024-07-31 20:14:04 Led Controller INFO [1454] Start to run WAN1_ON

2024-07-31 20:14:04 Led Controller INFO [1454] Start to run WAN0_OFF

2024-07-31 20:14:04 Led Controller INFO [1454] Start to run LAN_ON

2024-07-31 20:13:49 Led Controller INFO [1454] Start to run WAN1_OFF

2024-07-31 20:13:49 Led Controller INFO [1454] Start to run WAN0_ON

2024-07-31 20:13:49 Led Controller INFO [1454] Start to run LAN_ON

2024-07-31 19:08:16 Led Controller INFO [1454] Start to run WAN1_ON

2024-07-31 19:08:16 Led Controller INFO [1454] Start to run WAN0_OFF

2024-07-31 19:08:16 Led Controller INFO [1454] Start to run LAN_ON

2024-07-31 19:08:01 Led Controller INFO [1454] Start to run WAN1_OFF

2024-07-31 19:08:01 Led Controller INFO [1454] Start to run WAN0_ON

2024-07-31 19:08:01 Led Controller INFO [1454] Start to run LAN_ON

Your Home Network

icekk007

Intermittent connection - SYNC Timing Synchronization failure and Lost MDD Timeout

No Responses!

New to the Community?