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wirralguy
15-09-2010, 17:19
Hi i cant connect to the internet wondering can one of the experts here take a look at this info i got from the modem see if there’s any hope getting this sorted before the engineer comes on Friday.

Cable Modem Status
Item Status Comments
Acquire a Downstream Channel 298750000 Hz Locked
Connectivity State In Progress Upstream Parameters Acquired
Boot State In Progress Unknown

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 5
Downstream Frequency : 298750000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 6952 Ksym/sec
Downstream Interleave Depth : taps12Increment17
Downstream Receive Power Level : -3.1 dBmV
Downstream SNR : 40.8 dB

Cable Modem Upstream
Upstream Lock : Not Locked
Upstream Channel ID : 6
Upstream Frequency : 46200000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 21.0 dBmV
Upstream Mini-Slot Size : 2

Cable Modem Operation Configuration
Network Access : Denied
Maximum Downstream Data Rate : --
Maximum Upstream Data Rate : --
Maximum Upstream Channel Burst : --
Maximum Number of CPEs : -1
Modem Capability : Concatenation Enabled, Fragametation Enabled, PHS Enabled
Cable Modem Event Log
First Time Last Time Priority Description
Wed Sep 15 15:46:38 2010 Wed Sep 15 15:46:38 2010 Information (7) MAP w/initial maintenance region received
Wed Sep 15 15:46:35 2010 Wed Sep 15 15:46:35 2010 Critical (3) No Ranging Response received - T3 time-out
Wed Sep 15 15:46:35 2010 Wed Sep 15 15:46:35 2010 Information (7) MAP w/initial maintenance region received
Wed Sep 15 15:46:32 2010 Wed Sep 15 15:46:32 2010 Critical (3) No Ranging Response received - T3 time-out
Wed Sep 15 15:46:32 2010 Wed Sep 15 15:46:32 2010 Information (7) MAP w/initial maintenance region received
Wed Sep 15 15:46:31 2010 Wed Sep 15 15:46:31 2010 Information (7) Downstream sync ok
Wed Sep 15 15:46:31 2010 Wed Sep 15 15:46:31 2010 Information (7) Beginning initial ranging...
Wed Sep 15 15:46:31 2010 Wed Sep 15 15:46:31 2010 Information (7) downstream time sync acquired...
Wed Sep 15 15:46:31 2010 Wed Sep 15 15:46:31 2010 Information (7) Downstream sync ok
Wed Sep 15 15:46:31 2010 Wed Sep 15 15:46:31 2010 Information (7) starting ds time sync acquisition...
Wed Sep 15 15:46:30 2010 Wed Sep 15 15:46:30 2010 Information (7) Locked on the downstream. Waiting for UCDs...
Wed Sep 15 15:46:30 2010 Wed Sep 15 15:46:30 2010 Information (7) Downstream lock ok
Wed Sep 15 15:46:28 2010 Wed Sep 15 15:46:28 2010 Information (7) DS channel override in cfg file, re-scanning downstream
Wed Sep 15 15:46:28 2010 Wed Sep 15 15:46:28 2010 Information (7) IP init completed ok
Wed Sep 15 15:46:28 2010 Wed Sep 15 15:46:28 2010 Information (7) CableModem TFTP init ok
Wed Sep 15 15:46:27 2010 Wed Sep 15 15:46:27 2010 Information (7) CableModem DHCP client init ok
Wed Sep 15 15:46:27 2010 Wed Sep 15 15:46:27 2010 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Wed Sep 15 15:46:21 2010 Wed Sep 15 15:46:21 2010 Information (7) MAP w/initial maintenance region received
Wed Sep 15 15:46:17 2010 Wed Sep 15 15:46:17 2010 Critical (3) No Ranging Response received - T3 time-out
Wed Sep 15 15:46:17 2010 Wed Sep 15 15:46:17 2010 Information (7) MAP w/initial maintenance region received
Wed Sep 15 15:46:15 2010 Wed Sep 15 15:46:15 2010 Critical (3) No Ranging Response received - T3 time-out
Wed Sep 15 15:46:15 2010 Wed Sep 15 15:46:15 2010 Information (7) MAP w/initial maintenance region received
Wed Sep 15 15:46:14 2010 Wed Sep 15 15:46:14 2010 Information (7) Downstream sync ok
Wed Sep 15 15:46:14 2010 Wed Sep 15 15:46:14 2010 Information (7) Beginning initial ranging...
Wed Sep 15 15:46:14 2010 Wed Sep 15 15:46:14 2010 Information (7) downstream time sync acquired...
Wed Sep 15 15:46:14 2010 Wed Sep 15 15:46:14 2010 Information (7) Downstream sync ok
Wed Sep 15 15:46:14 2010 Wed Sep 15 15:46:14 2010 Information (7) starting ds time sync acquisition...
Wed Sep 15 15:46:08 2010 Wed Sep 15 15:46:08 2010 Information (7) MAP w/initial maintenance region received
Wed Sep 15 15:46:08 2010 Wed Sep 15 15:46:08 2010 Critical (3) No Ranging Response received - T3 time-out
Wed Sep 15 15:46:08 2010 Wed Sep 15 15:46:08 2010 Information (7) MAP w/initial maintenance region received
Wed Sep 15 15:46:07 2010 Wed Sep 15 15:46:07 2010 Information (7) Downstream sync ok
Wed Sep 15 15:46:06 2010 Wed Sep 15 15:46:06 2010 Information (7) Beginning initial ranging...
Peter_
15-09-2010, 17:26
Upstream transmit Power Level : 21.0 dBmV

They have booked an engineer because your Downstream is way to low it should be over 34 and I would also have booked an engineer for that reason for you.:)
wirralguy
15-09-2010, 17:52
Thanks for he info mate looks like I'll have to make do with my mobile dongle for now.
Since posting this though a mate who lives round the corner has just text me saying his is off as well.
The support guy I spoke to said there are no issues in my area thats why i need a call out dont no what to make of it now
Peter_
15-09-2010, 18:19
Thanks for he info mate looks like I'll have to make do with my mobile dongle for now.
Since posting this though a mate who lives round the corner has just text me saying his is off as well.
The support guy I spoke to said there are no issues in my area thats why i need a call out dont no what to make of it now
It could be an area fault or just a coincidence.:)
jb66
15-09-2010, 19:08
They have booked an engineer because your Downstream is way to low it should be over 34 and I would also have booked an engineer for that reason for you.:)

Upstream
Peter_
15-09-2010, 19:13
Upstream
As per post 2 above.;)
jb66
15-09-2010, 20:39
What does post 2 say?
pip08456
15-09-2010, 20:41
What does post 2 say?

He's got you there Masque :D:D:D:D:D
Peter_
15-09-2010, 20:50
What does post 2 say?

He's got you there Masque :D:D:D:D:D
That is me typing the wrong thing against the Upstream.
wirralguy
15-09-2010, 20:50
No idea what any of the numbers mean it came back on about an hour ago.
I guess I'll phone back and cancel the call out tomorrow
Peter_
15-09-2010, 20:52
No idea what any of the numbers mean it came back on about an hour ago.
I guess I'll phone back and cancel the call out tomorrow
It will have been an outage, if it is fine tomorrow give them a call and after rechecking the connection they will probably cancel the engineer.
pip08456
15-09-2010, 22:21
There are only 3 numbers to bother about.

Downstream Receive Power Level : -3.1 dBmV (between this range OK -6dBmV to +15dBmV)
Downstream SNR : 40.8 dB (above 33dB OK)

Upstream transmit Power Level : 21.0 dBmV (30-53dBmV OK)
Peter_
15-09-2010, 22:23
Upstream transmit Power Level : 21.0 dBmV (30-53dBmV OK)
Only one with an issue which was the Upstream, but as he is back online it was probably an outage.
pip08456
15-09-2010, 22:27
Only one with an issue which was the Upstream, but as he is back online it was probably an outage.

Agreed, just letting him know which numbers to take note of for future reference.
Peter_
15-09-2010, 22:29
Agreed, just letting him know which numbers to take note of for future reference.
I know that.;)

The Upstream power appeared to fit the criteria for an outage and I was not surprised that it came back on.
jb66
15-09-2010, 22:31
There are only 3 numbers to bother about.

Downstream Receive Power Level : -3.1 dBmV (between this range OK -6dBmV to +15dBmV)
Downstream SNR : 40.8 dB (above 33dB OK)

Upstream transmit Power Level : 21.0 dBmV (30-53dBmV OK)

Upstream is 35-55db
pip08456
15-09-2010, 22:35
Upstream is 35-55db

On 50Mb yes otherwise Upstream Transmit Power: Anything between 28dB and 53dB is fine. Up to 55dB is also fine so long as it's fairly stable. Above 55dB suggests issues.
Peter_
15-09-2010, 22:37
On 50Mb yes otherwise Upstream Transmit Power: Anything between 28dB and 53dB is fine. Up to 55dB is also fine so long as it's fairly stable. Above 55dB suggests issues.
If it is FUBARED on a call then the power levels are irrelevant and unless the is an outage a tech will be booked.;)
jb66
15-09-2010, 22:41
On 50Mb yes otherwise Upstream Transmit Power: Anything between 28dB and 53dB is fine. Up to 55dB is also fine so long as it's fairly stable. Above 55dB suggests issues.

I disagree, 53 is quite common where I work, and I have it in Black and White, 35-55db
Peter_
15-09-2010, 22:43
I disagree, 53 is quite common where I work, and I have it in Black and White, 35-55db
We will book a tech for either side of that if they are having any issues.;)
jb66
15-09-2010, 22:47
We will book a tech for either side of that if they are having any issues.;)

You'll also book at tech if the customer is having trouble with their computer and you notice the downstream is a little high, so I go and fix the power level then get roped into fixing their computer too which has nothing to do with me!
Peter_
15-09-2010, 22:50
You'll also book at tech if the customer is having trouble with their computer and you notice the downstream is a little high, so I go and fix the power level then get roped into fixing their computer too!
Well you are going out of the support scope fixing their computer as you are not insured to do that.;):D

No if they have a computer issue and the is no real issue with their connection then I either refer them to the vendor or transfer them to Digital Home Support and advise them to call back once the machine is fixed in order to run diagnostics.;)
pip08456
15-09-2010, 23:06
I would not allow a tech to do anything with my PC other than check the modem levels through the browser.

As Masque says you are not insured. You break it-you pay for it.

Modems can an will connect quite happily as low as 28dB and at 55dB they are IMO the min and max threshold. In other words " if it works don't try to fix it". Obviously if there is a problem then bringing the levels into a tighter range may be the answer.
jb66
16-09-2010, 07:17
I would not allow a tech to do anything with my PC other than check the modem levels through the browser.

As Masque says you are not insured. You break it-you pay for it.

Modems can an will connect quite happily as low as 28dB and at 55dB they are IMO the min and max threshold. In other words " if it works don't try to fix it". Obviously if there is a problem then bringing the levels into a tighter range may be the answer.

Modems can sit happily at 58 with a downstream of -10, ive seen it but we are talking about the specs that virgin adhere to, I'd lover to make everyones upstream 40db but It doesnt quite work like that, at and end of line tap the upstream at the pit could be 47db, so the time it goes through a splitter iso and along a drop cable the upstream is at 53 and cannot be brought down any further, recently if a modem was at 57 it was left but now we are instructed that we must fit an HDU (if there are no network problems) if we cant get the upstream down to at least 55. Or for long drops RG11