Are these good numbers for my modem?

I had someone over today (network guy working on my computer) and said my signal could use a little improvement.

He said just have someone look at it. It couldn't hurt.

Is this so?

It is on the Netgear CG3000DCR and on the Deluxe 50 (if this info was needed)

Thanks,

Reno

Responses

VBSSP-RICH

Advocate

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1.4K Messages

9 years ago

Hello Vicini and welcome, Please see these Troubleshooting Tips ( http://forums.businesshelp.comcast.com/t5/Connectivity/Connection-Troubleshooting-Tips/m-p/25861#M3264 ) for you reference information. It seems your downstream power levels are on the out of specification line. Hope this helps you out.

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Vicini

New Contributor

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13 Messages

9 years ago

I did look at that yesterday. A very well written post. However, it does not say what unacceptable numbers are ( for the downstream power levels like the others do ) which is the one that looks off.
For a business class service, acceptable doesn't really sound like something we want to hear.
I'm a retired AT&T tech and we had requirements for DSL signal levels for business class Internet.
Now, these say acceptable but what are the requirements for business class Internet?

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Vicini

New Contributor

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13 Messages

9 years ago

This is what my downstream power is right now.
Big change from the original post. They seem better but it will change a lot in a few minutes

Downstream Power -7.5 dBmV -8.5 dBmV -8.7 dBmV -7.8 dBmV -8.4 dBmV -7.9 dBmV -8.8 dBmV -8.7 dBmV

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train_wreck

Gold Problem solver

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610 Messages

9 years ago

Downstream receive power level reference:

Ideal: -10dbmv to +10dbmv

Marginal: -11dbmv through -14dbmv, +11dbmv through +14dbmv (at this point, speeds may be slower than average, latencies may be higher than average, and modem may intermittently reboot)

Out-of-spec: below -15dbmv, above +15dbmv (at this point, the modem will likely fail to register, and will not come online. If it manages to come online, speeds will be drastically slower and modem will reboot frequently.)

This reference is the same regardless of residential or business class service; as far as the cable modem/coax plant is concerned, they are indistuingishable.

Are you having issues with the modem right now?

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Vicini

New Contributor

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13 Messages

9 years ago

I am and I had a tech come out yesterday afternoon. Said there is an issue outside and will need to send an engineer out or something like that. My signal levels change constantly. My speeds don't change but I do get lots of timeouts and huge latency

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train_wreck

Gold Problem solver

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610 Messages

9 years ago

Yeah they definitely shouldnt be changing by more than a few decimal points that quickly. Youll need a tech out.

EDIT you said you already had one out, sorry. It will up to local maintenance to investigate it. Perhaps a mod here can escalate this for you..... good luck!

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Vicini

New Contributor

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13 Messages

9 years ago

As of right now 10:51pm

Downstream Power -7.5 dBmV -8.6 dBmV -8.7 dBmV -7.7 dBmV -8.4 dBmV -7.8 dBmV -8.7 dBmV -8.7 dBmV

But maybe the 8.x is a little high?

I guess it seems to be stable.

Im sure these numbers change often thru out the day.

So my question now is, if we have a unstable connection, how big of a jump would it have to be for us to see a disruption? I'm sure a .1 difference wouldn't be noticeable.

And thank you for all the feedback on have given.

Reno

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VBSSP-RICH

Advocate

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1.4K Messages

9 years ago

The original Troubleshooting Tips link I provided you specifies that actual specification high and low levels. When it starts bouncing on either side of these specification levels then there would be either a cabling or splitter corrosion, or some other signaling (attenuation or amplification ) issue that would need to be addressed.

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Vicini

New Contributor

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13 Messages

9 years ago

Yes Rich, I read the post you specifically referred to twice now. But it doesn't answer the question I proposed.

I have intermittent service issues... Longer wait times when loading pages or sometimes it times out.

But I don't really see any speed issues. My speed tests seems to be consistent.

I understand there will be signal level variances thru out the day.

Right now, my signal levels are

Downstream Power:

-7.0 dBmV -8.1 dBmV -8.2 dBmV -7.3 dBmV -8.0 dBmV -7.5 dBmV -8.4 dBmV -8.3 dBmV

(which falls in between the Acceptable and Idael). Looks good from the post you referred me to. Happy to see that, for now.

How much of a signal variance would there have to be before I would see a disruption in service?

Should I be more worried with a +/-1.0 dBmV as opposed to a +/-0.1 dBvM?

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