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Can problems on upstream affect DL
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Old 30-01-2018, 21:30   #1
Spitfire16
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Join Date: Jun 2006
Posts: 38
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Can problems on upstream affect DL

Hello Folks,

I rang VM last week to complain of a slow broadband speed , they couldn't identify a fault.

I posted on the VM forums and they have advised today the following :

Quote:
I've located your details and there does appear to be an issue present concerning your equipment SNR upstream level that I'd like for an engineer to investigate.
Will this upstream issue be affecting the download speed's aswell ?

The Router stats are below for you

Downstream :

Downstream bonded channels
Channel
Frequency(Hz)
Power
(dBmV)
SNR
(dB)
Modulation
Channel ID
1
290750000
2.7
38
256 qam
20
2
322750000
2.7
40
256 qam
24
3
314750000
3
40
256 qam
23
4
306750000
2.7
40
256 qam
22
5
298750000
3
38
256 qam
21
6
282750000
2.7
40
256 qam
19
7
274750000
2.7
40
256 qam
18
8
266750000
2.7
40
256 qam
17
9
258750000
2.5
40
256 qam
16
10
250750000
2.5
40
256 qam
15
11
242750000
2.4
40
256 qam
14
12
234750000
2.5
40
256 qam
13
13
226750000
2.5
40
256 qam
12
14
218750000
2.7
40
256 qam
11
15
210750000
2.7
40
256 qam
10
16
202750000
3
40
256 qam
9
17
194750000
3.2
40
256 qam
8
18
186750000
3
40
256 qam
7
19
178750000
3
40
256 qam
6
20
170750000
3
40
256 qam
5
21
162750000
2.9
40
256 qam
4
22
154750000
2.7
40
256 qam
3
23
146750000
2.7
40
256 qam
2
24
138750000
2.5
40
256 qam
1


Downstream bonded channels
Channel
Locked Status
RxMER(dB)
Pre RS Errors
Post RS Errors
1
Locked
38.9
79
0
2
Locked
40.3
88
0
3
Locked
40.3
92
0
4
Locked
40.9
63
0
5
Locked
38.9
82
0
6
Locked
40.3
93
0
7
Locked
40.9
52
0
8
Locked
40.3
53
0
9
Locked
40.3
35
0
10
Locked
40.9
36
0
11
Locked
40.3
37
0
12
Locked
40.3
24
0
13
Locked
40.3
10
0
14
Locked
40.3
11
0
15
Locked
40.3
11
0
16
Locked
40.9
8
0
17
Locked
40.9
23
0
18
Locked
40.3
21
0
19
Locked
40.3
27
0
20
Locked
40.3
29
0
21
Locked
40.9
9
0
22
Locked
40.9
24
0
23
Locked
40.3
20
0
24
Locked
40.3
24
0

Upstream :

Upstream bonded channels
Channel
Frequency(Hz)
Power
(dBmV)
Symbol Rate (ksps)
Modulation
Channel ID
1
53700000
40.5
5120
64 qam
13
2
25800000
39
5120
64 qam
12
3
32600000
39.3
5120
64 qam
11
4
39400000
39.3
5120
64 qam
10


Upstream bonded channels
Channel
Channel Type
T1 Timeouts
T2 Timeouts
T3 Timeouts
T4 Timeouts
1
ATDMA
0
0
0
0
2
ATDMA
0
0
1402
2795
3
ATDMA
0
0
4
0
4
ATDMA
0
0
1
0
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Old 30-01-2018, 23:27   #2
General Maximus
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Re: Can problems on upstream affect DL

all looks fine to me. Downstream power is 3, snr is 40, upstream power is 39 ish with very few T3 or T4 timeouts.

It looks like there is an issue with one of the upstream channels you are bonding to (channel 2) but that isn't your fault. It is a shame that the forum team are going the long way around it. Instead of directly escalating it to networks they are going to send an engineer who is going to tell you he cant do anything and he will escalate it. The good news is that once escalated it normally gets fixed in 4 hours.

Have you tried rebooting the shub to see if it locks onto a different channel?
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Old 30-01-2018, 23:40   #3
Spitfire16
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Re: Can problems on upstream affect DL

Quote:
Originally Posted by General Maximus View Post
all looks fine to me. Downstream power is 3, snr is 40, upstream power is 39 ish with very few T3 or T4 timeouts.

It looks like there is an issue with one of the upstream channels you are bonding to (channel 2) but that isn't your fault. It is a shame that the forum team are going the long way around it. Instead of directly escalating it to networks they are going to send an engineer who is going to tell you he cant do anything and he will escalate it. The good news is that once escalated it normally gets fixed in 4 hours.

Have you tried rebooting the shub to see if it locks onto a different channel?
Cheers for your reply Maximus,

I've tried several reboots of the SHUB but it's keeping me on this channel , can the engineer when he comes put me on a different channel ?
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Old 30-01-2018, 23:50   #4
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Re: Can problems on upstream affect DL

Nope, they will be the only channels available to your area. Dont worry about it though, everyone will be having the same problem and it will be fixed in a jiffy. When is he coming round?
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