Virgin Media Community

[colonelblighty]

Hi, Looked through the forums and saw a similar post to mine so thought I'd ask a similar question and hopefully get some insight and quite happy to wait my turn for mods to get round to advising but obviously appreciate any input other members have.

Upgraded to the 1Gb yesterday and although getting much faster speeds it's not quite as high as I'd hoped for but not far off so perhaps there's something simple that can be done to squeeze every last drop out of my connection.

Got a hub 5 in modem mode

Cat 6 cable connected to the 2.5g port

connected to 2.5g port on my Asus RT-AX86U router

Speed test results on router come in as 

Since my original installation a few years ago I've got this small attenuator in the chain

I've also got this plug thing which I've never fully understood what it does except for if it's knocked off the internet goes off.

Cable Modem stats are as follows:

Item Status Comments

Acquired Downstream Channel(Hz)	203000000	Locked
Ranged Upstream Channel(Hz)	60300000	Ranged
Provisioning State	Online	Operational

Downstream bonded channels

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

1	203000000	2.3	39	QAM 256	9
2	139000000	2.1	39	QAM 256	1
3	147000000	2.1	39	QAM 256	2
4	155000000	2.1	39	QAM 256	3
5	163000000	2.1	39	QAM 256	4
6	171000000	2.2	39	QAM 256	5
7	179000000	2.4	39	QAM 256	6
8	187000000	2.5	39	QAM 256	7
9	195000000	2.6	39	QAM 256	8
10	211000000	2.4	39	QAM 256	10
11	219000000	2.5	39	QAM 256	11
12	227000000	2.7	39	QAM 256	12
13	235000000	2.6	39	QAM 256	13
14	243000000	2.3	39	QAM 256	14
15	251000000	2.1	39	QAM 256	15
16	259000000	2.1	39	QAM 256	16
17	267000000	2.1	39	QAM 256	17
18	275000000	2	39	QAM 256	18
19	283000000	1.8	39	QAM 256	19
20	291000000	1.6	38	QAM 256	20
21	299000000	1.4	39	QAM 256	21
22	307000000	1.4	38	QAM 256	22
23	315000000	1.6	39	QAM 256	23
24	323000000	1.9	39	QAM 256	24
25	331000000	2.2	39	QAM 256	25
26	339000000	2.4	39	QAM 256	26
27	347000000	2.3	39	QAM 256	27
28	355000000	2.3	39	QAM 256	28
29	363000000	2.5	39	QAM 256	29
30	371000000	2.7	39	QAM 256	30
31	379000000	2.7	39	QAM 256	31

Downstream bonded channels

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

1	Locked	39	0	0
2	Locked	39	0	0
3	Locked	39	0	0
4	Locked	39	0	0
5	Locked	39	1	0
6	Locked	39	0	0
7	Locked	39	0	0
8	Locked	39	0	0
9	Locked	39	0	0
10	Locked	39	0	0
11	Locked	39	0	0
12	Locked	39	0	0
13	Locked	39	0	0
14	Locked	39	0	0
15	Locked	39	0	0
16	Locked	39	0	0
17	Locked	39	0	0
18	Locked	39	0	0
19	Locked	39	0	0
20	Locked	38	0	0
21	Locked	39	0	0
22	Locked	38	0	0
23	Locked	39	0	0
24	Locked	39	0	0
25	Locked	39	0	0
26	Locked	39	0	0
27	Locked	39	0	0
28	Locked	39	0	0
29	Locked	39	0	0
30	Locked	39	0	0
31	Locked	39	0	0

Upstream bonded channels

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

0	60300000	36.5	5120	QAM 64	1
1	53700000	36.5	5120	QAM 64	2
2	46200000	37	5120	QAM 64	3
3	39400000	36.5	5120	QAM 64	4
4	32600000	36.5	5120	QAM 64	5
5	23600000	36	5120	QAM 64	6

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

0	ATDMA	0	0	0	0
1	ATDMA	0	0	0	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	0	0
5	ATDMA	0	0	0	0

General Configuration

Network accessMaximum Number of CPEsBaseline PrivacyDOCSIS ModeConfig file

Allowed

1

Enabled

3.1

fg87dsfd;kfoA,.iyewrkldJK

Primary Downstream Service Flow

SFIDMax Traffic RateMax Traffic BurstMin Traffic Rate

5724

1200000450 bps

42600bytes

0 bps

Primary Upstream Service Flow

SFIDMax Traffic RateMax Traffic BurstMin Traffic RateMax Concatenated BurstScheduling Type

5723

55000270 bps

42600bytes

0 bps

16320bytes

Best Effort

[colonelblighty]

Network stats added as OP exceeded limit

Network Log

Time Priority Description

11-03-2023 11:06:46	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 11:06:46	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:55:43	notice	REGISTRATION COMPLETE - Waiting for Operational status
11-03-2023 10:55:37	warning	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:55:37	warning	Dynamic Range Window violation
11-03-2023 10:55:37	warning	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:55:37	warning	REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:55:37	warning	Dynamic Range Window violation
11-03-2023 10:55:37	warning	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:55:37	warning	Dynamic Range Window violation
11-03-2023 10:55:37	warning	Dynamic Range Window violation
11-03-2023 10:55:37	warning	Dynamic Range Window violation
11-03-2023 10:55:37	warning	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:55:37	warning	Dynamic Range Window violation
11-03-2023 10:55:37	warning	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:55:37	warning	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:55:31	notice	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 4.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:55:28	notice	TLV-11 - unrecognized OID;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:55:26	warning	DHCP WARNING - Non-critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:55:24	notice	Honoring MDD; IP provisioning mode = IPv4
11-03-2023 10:55:15	critical	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11-03-2023 10:54:58	critical	Cable Modem Reboot due to power button reset
10-03-2023 09:28:47	critical	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
10-03-2023 09:28:30	critical	Cable Modem Reboot via RG reboot command
09-03-2023 22:39:42	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
03-03-2023 17:26:05	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
25-02-2023 09:07:25	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
22-02-2023 18:41:45	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
22-02-2023 11:22:25	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
22-02-2023 11:10:53	critical	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
22-02-2023 11:10:35	critical	Cable Modem Reboot via RG reboot command
07-02-2023 01:40:10	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1

[Anonymous]

Stats look good to me but the hub might be due a full reboot without the ethernet connection.

Also try disabling QOS on the Asus router. 

[colonelblighty]

Thanks for the reply,

I had rebooted earlier before posting any stats disconnecting the ethernet cable when I did so. Tried turning off the QoS service and did a few tests and the top one and most recent in the table with it turned back on.

[carl_pearce]

The plug will be due to you having fibre (Yellow cable) to the VM box outside which then needs to be converted to coax for the HUB and TV boxes, which requires power to the blue device seen below:

Have you tried a few of the sites available to your ASUS router?

I have the same router and find the suggested site is not always the fastest, even though the latency is better.

Depending on the time of day you may not always see the expected speeds.

[colonelblighty]

Aah makes sense now thanks.

I tried a few and they did vary from a poor 230 up to a 1030 I think I got so all in all not bad at all. 

I've read some posts saying instead of the attenuator I should really have an equaliser instead but I don't really know what the difference is.

[Zach_R]

Hi @colonelblighty,

Thank you for your posts and welcome to our community forums. We're here to help.

I'm sorry to hear you're not completely happy with your connection speeds. I've taken a look at your stats and speed test readings and I can't seem to see any issue detected there. Are you having any intermittent connection loss at all?

Thanks,
 

[colonelblighty]

Hi,

Nope all good thanks and based on the advice of other posters reckon if this is as good as it gets then I'm satisfied.

I would like to know if the 3db attenuator is required as when I first got the FTTP I was the first one in our area to get it and I remember them saying the signal was too strong but I don't know if this is still the case or not.

[legacy1]

---

@colonelblighty wrote:

Upstream bonded channels

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

0	60300000	36.5	5120	QAM 64	1
1	53700000	36.5	5120	QAM 64	2
2	46200000	37	5120	QAM 64	3
3	39400000	36.5	5120	QAM 64	4
4	32600000	36.5	5120	QAM 64	5
5	23600000	36	5120	QAM 64	6

---

Ooo 6 upstream channels😋

[Kath_F · Accepted solution]

Hi colonelblighty, 

Thanks for coming back to us on this one. 

We're glad all is OK with the connection itself. In terms of the 3db attenuator, as all your current signal levels are in the optimal range, we would advise leaving this there as otherwise it could cause intermittent issues. 

If you have any further issues, pop back and let us know. 

Many thanks,