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beest
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RCS Partial Service errors

This morning I've had intermittent broadband connectivity, which has made video calls impossible. I'm seeing an 'RCS Partial Service' error in the router log. I've tried rebooting the router, leaving it powered off for 10 minutes, but the error keeps coming back. I've also check the physical cable connections. Everything I've read in this forum indicates that it's a problem between the router and the outside world.

Here's my hub information:

Cable Modem StatusItem Status Comments

Acquired Downstream Channel (Hz)
186750000
Locked
Ranged Upstream Channel (Hz)
53700000
Locked
Provisioning State
Online

 

Downstream bonded channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

11867500002.237256 qam7
21387500001.736256 qam1
31467500001.936256 qam2
41547500001.737256 qam3
5162750000237256 qam4
61707500002.237256 qam5
71787500002.238256 qam6
81947500002.238256 qam8
92027500002.238256 qam9
10210750000238256 qam10
112187500001.938256 qam11
122267500001.738256 qam12
132347500001.438256 qam13
142427500001.238256 qam14
152507500000.938256 qam15
162587500000.738256 qam16
172667500000.538256 qam17
182747500000.538256 qam18
192827500000.238256 qam19
20290750000038256 qam20
21298750000-0.238256 qam21
22306750000-0.238256 qam22
23314750000-0.238256 qam23
24322750000038256 qam24

 

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beest
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Re: RCS Partial Service errors

Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1Locked37.3702964134719
2Locked36.8839778236164
3Locked36.6797095207172
4Locked37.6750089179051
5Locked37.9713654157466
6Locked37.9690463145256
7Locked38.6679187138521
8Locked38.9671998132994
9Locked38.9670190130653
10Locked38.9662788126417
11Locked38.9651054121235
12Locked38.6644972118011
13Locked38.9640182114781
14Locked38.9626855108807
15Locked38.9613468103782
16Locked38.959830098088
17Locked38.658298692013
18Locked38.956931087067
19Locked38.955705883041
20Locked38.654652079562
21Locked38.953322474728
22Locked38.951404169222
23Locked38.649624963793
24Locked38.947533158441
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beest
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Re: RCS Partial Service errors

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

1537000003.4512016 qam2
2462000003.35512016 qam3
3394000003.35512016 qam4
4603000003.35512016 qam1



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000
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beest
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Re: RCS Partial Service errors

Network Log

Time Priority Description

05/10/2020 12:16:8Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 12:16:8Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 12:14:56Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 12:12:42criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 12:12:27Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 12:12:18criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 12:12:14Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 12:12:14criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 12:12:14Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 12:11:39noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 11:58:40Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 11:58:39Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 11:58:39Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 11:58:39criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 11:58:36Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 11:58:36criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 11:58:35Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 11:58:34criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 11:58:33Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
05/10/2020 11:58:33criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

 

I switched the router off at 12:00 and left it for 10 minutes, which you can see in the log above.

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Z92
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Message 5 of 9
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Re: RCS Partial Service errors

Looks like there's some kind of interference, have you ensured that all the coax connections are hand tight? 

Have you checked for issues in your area? 

 

beest
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Message 6 of 9
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Re: RCS Partial Service errors

The connections all seem good inside and outside the house. The router is in a networking cabinet so nothing should interfere with it. The service status says there are no issues in the area, and the equipment test came back all ok as well.

Which bit of the router log is telling you that there's interference?

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Andrew-G
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Message 7 of 9
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Re: RCS Partial Service errors

By interference I think @Z92 means radio frequency noise.  Your network log shows that your hub is losing upstream communication with VM's network gear (a "partial service" is where one or more channels have gone AWOL, can be up or down, but usually caused by the hub's upstream comms breaking down).

Then, if you look at your upstream data, all four channels are operating at 16QAM, when they should run at 64 QAM, which limits data throughput and indicates the hub is struggling to communicate, and your upstream power levels are all at the lower boundary of acceptable.  So basically, the hub's whispering in a noisy pub.  Over the other side of the bar, the VM network gear is saying back "I can't hear you", but all the hub is getting is "mmmfff...can't...mmmff...oooo".

This could be an area fault, or it could be specific to your line.  As there's not much you can do beyond rebooting the hub I'll flag this for the forum staff to advise on some next steps, but that will take some hours as they're not a first line or real time response service.  You could ring it in rather than wait, personally I'd rather have teeth pulled than deal with VM by phone.

 

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Emily_G
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Message 8 of 9
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Re: RCS Partial Service errors

Thanks for the post.


We can see an engineer has been booked for you regarding this, please do let us know how this goes.

 

Thanks, Emily.

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beest
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Message 9 of 9
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Re: RCS Partial Service errors

Yes, the qam upstream numbers did start to improve since I posted. But then on Saturday evening we lost connection entirely (TV and broadband) so hopefully the engineer will be able to figure it out.

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