Upstream/Downstream Channels DB

[alasdairc]

Hi all,

Suffering with some latency spikes, please could someone have a look at my Downstream/Upsteam channels - also if someone could explain it, that would be even better

Thanks!

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Cable Modem StatusItem Status CommentsChannel Overview Downstream Upstream

Cable Modem Status	Online	DOCSIS 3.1
Primary downstream channel	Locked	SC-QAM
DOCSIS 3.0 channels	31	4
DOCSIS 3.1 channels	1	0

3.0 Downstream channels

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

1	139000000	18.9	40.4	QAM256	1
2	147000000	18.9	40.9	QAM256	2
3	155000000	18.7	40.4	QAM256	3
4	163000000	18.8	40.4	QAM256	4
5	171000000	18.7	40.9	QAM256	5
6	179000000	18.5	40.4	QAM256	6
7	187000000	18.6	40.9	QAM256	7
8	195000000	18.7	40.9	QAM256	8
9	203000000	18.5	40.9	QAM256	9
10	211000000	18.5	40.4	QAM256	10
11	219000000	18.5	40.9	QAM256	11
12	227000000	18.2	40.4	QAM256	12
13	235000000	17.9	40.4	QAM256	13
14	243000000	17.4	40.9	QAM256	14
15	251000000	16.8	40.4	QAM256	15
16	259000000	17.3	40.4	QAM256	16
17	267000000	17.9	40.9	QAM256	17
18	275000000	18.5	40.4	QAM256	18
19	283000000	18.7	40.9	QAM256	19
20	291000000	19.4	40.9	QAM256	20
21	299000000	19.6	40.9	QAM256	21
22	307000000	18.9	40.4	QAM256	22
23	315000000	18.7	40.4	QAM256	23
24	323000000	19.3	40.4	QAM256	24
25	331000000	19.4	40.9	QAM256	25
26	339000000	19.4	40.9	QAM256	26
27	347000000	19.7	40.4	QAM256	27
28	355000000	19.8	40.9	QAM256	28
29	363000000	18.8	40.4	QAM256	29
30	371000000	18.2	40.9	QAM256	30
31	379000000	18.7	40.4	QAM256	31

3.1 Downstream channels

Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)

159

96

4K

1880

QAM4096

759

3.1 Downstream channels

Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

159

Locked

41

18.8

1489580

0

3.0 Upstream channels

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

1	32600000	32	5120 KSym/sec	64QAM	3
2	25800000	32	5120 KSym/sec	64QAM	4
3	39400000	32	5120 KSym/sec	64QAM	2
4	46200000	32	5120 KSym/sec	64QAM	1

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	US_TYPE_STDMA	0	0	0	0
2	US_TYPE_STDMA	0	0	0	0
3	US_TYPE_STDMA	0	0	0	0
4	US_TYPE_STDMA	0	0	0	0

[Tudor · Accepted solution]

Power levels are way too high on downstream, nearly double the maximum. Probably need a technician’s visit to rectify. 

Check with Area faults on 0800 561 0061 If you have a VM landline 150 this goes down to post code level. You could also try the web page http://www.virginmedia.com/servicechecker

If no faults found:

Call Customer Services on 0345 454 1111/150 if you have a VM landline or wait a day or two for a VM staff member to get to your post.

[alasdairc]

Thank you kindly - I will give them a call now

Thanks again