SYNC Timing and RCS Partial Service errors

[Cannonfodder39]

Used to have a sound stable connection but over the past three-four days I've had persistent dropouts to the point where I am now unable to work from home as Teams calls are impossible due to VPN dropping in and out.

Having looked at a couple of other posts I am hoping one of the Forum Team will pick this up as the Network Log from the hub is showing SYNC Timing Synchronization failures along with RCS Partial Service errors which seems to require engineers to resolve. Note: I have done the obvious and checked all connections, rebooted and reset the hub, etc.

Hub logs:

Downstream bonded channels
Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1	139000000	-3	37	256 qam	1
2	147000000	-2.7	37	256 qam	2
3	155000000	-3.2	38	256 qam	3
4	163000000	-3.5	38	256 qam	4
5	171000000	-3.2	38	256 qam	5
6	179000000	-2.7	38	256 qam	6
7	187000000	-2.2	38	256 qam	7
8	195000000	-2.5	38	256 qam	8
9	203000000	-2.7	38	256 qam	9
10	211000000	-2.7	38	256 qam	10
11	219000000	-2.4	37	256 qam	11
12	227000000	-2.5	38	256 qam	12
13	235000000	-2.9	38	256 qam	13
14	243000000	-3	38	256 qam	14
15	251000000	-2.7	38	256 qam	15
16	259000000	-2.9	38	256 qam	16
17	267000000	-3	38	256 qam	17
18	275000000	-3.2	38	256 qam	18
19	283000000	-2.9	38	256 qam	19
20	291000000	-2.7	38	256 qam	20
21	299000000	-3	38	256 qam	21
22	307000000	-3.4	38	256 qam	22
23	315000000	-3.5	38	256 qam	23
24	323000000	-3.2	38	256 qam	24
Downstream bonded channels
Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1	Locked	37.6	1713070	3152892
2	Locked	37.6	3027173	79678
3	Locked	38.2	4950403	2507326
4	Locked	38.6	3459512	4981124
5	Locked	38.6	23131	207493
6	Locked	38.6	4518719	2853358
7	Locked	38.6	4348491	679562
8	Locked	38.9	1707	0
9	Locked	38.6	73	0
10	Locked	38.6	105	0
11	Locked	37.6	22	0
12	Locked	38.6	22	0
13	Locked	38.9	9	0
14	Locked	38.6	29	0
15	Locked	38.9	40	0
16	Locked	38.9	28	0
17	Locked	38.9	21	0
18	Locked	38.9	12	0
19	Locked	38.6	14	0
20	Locked	38.6	38	0
21	Locked	38.9	37	0
22	Locked	38.9	26	0
23	Locked	38.6	28	0
24	Locked	38.9	18	0

Upstream bonded channels
Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
1	39400000	48.5	5120	64 qam	4
2	46200000	49.5	5120	64 qam	3
3	53700000	50.5	5120	64 qam	2
4	60300000	50.8	5120	64 qam	1
Upstream bonded channels
Channel	Channel Type	T1 Timeouts	T2 Timeouts	T3 Timeouts	T4 Timeouts
1	ATDMA	0	0	4	0
2	ATDMA	0	0	7	0
3	ATDMA	0	0	5	0
4	ATDMA	0	0	4	0

Network Log
Time	Priority	Description
02/07/2022 13:46	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:34	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:33	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:32	notice	LAN login Success;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:30	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:30	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:29	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:28	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:27	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:26	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:25	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:25	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:23	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:21	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:20	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:19	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:17	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
02/07/2022 13:17	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;

[Anonymous · Accepted solution]

You have loads of post RS errors on seven of your downstream channels, a couple of your upstream power levels are a little too high and you have lots of T3 timeouts. 

Check for local issues on 0800 561 0061 and ensure that all cables and connections are tight and secure and not kinked or damaged. 

[Cannonfodder39]

Thanks Cardiffman

I had tried before re: checking connections and all appeared OK. What I have just done now though is take out the TV/broadband coax splitter (don't have the TV service anymore) and plugged incoming coax straight into the back of the hub. Continuous ping of bbc website appears to be returning stable connection......"interesting", as never been an issue previous.

We shall see!

Cheers

[Anonymous]

Thanks for the update. It's always helpful to hear what has worked.