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Korriee

join:2012-09-16

1 edit

[Signals] Dropping connection

downloadUntitled.tiff 221,262 bytes
We have been losing internet for at least 5-10 seconds every 30-120 minutes multiple times, (for at least a year +) wondering if my signals look ok.

Downstream
Freq/Power: 597.000 MHz 9 dBmV
Signal to Noise Ratio: 38 dB
Modulation: QAM256
Upstream
Freq/Power: 34.800 MHz 46 dBmV
Channel Type: DOCSIS 2.0 (ATDMA)
Symbol Rate: 5120 kSym/sec
Modulation: QAM64

MODEL: TM402P

tried connecting directly to the modem and still same thing, no packets loss to 192.168.100.1, modem doesn't restart either.

--- 8.8.8.8 ping statistics ---
3450 packets transmitted, 3254 packets received, 5.7% packet loss

(attachment is a picture showing the event log.)


owlyn
Premium,MVM
join:2004-06-05
Newtown, PA

At 9dBmv, your DS signal is too high. The acceptable range is +8 to -8. Call Comcast.



Johkal
Cool Cat
Premium,MVM
join:2002-11-13
Happy Valley
kudos:9

said by owlyn:

At 9dBmv, your DS signal is too high. The acceptable range is +8 to -8. Call Comcast.

I beg to differ.

»Comcast High Speed Internet FAQ »What should my Signal Levels be?

For all modems:
-10 dBmV to +10 dBmV "Recommended".
-11 dBmV to -14 dBmv / +11 dBmV to +14 dBmV "Acceptable".
-15 dBmV & +15 dBmV "Maximum".
--
In God we trust; all others bring data!


Korriee

join:2012-09-16

Any idea what's wrong with this connection then? o--o



Johkal
Cool Cat
Premium,MVM
join:2002-11-13
Happy Valley
kudos:9

I don't see anything that jumps out as an issue. Monitor your signal levels for the next couple hours. Record the levels every half hour to see if any of them are moving. If you don't see a huge change towards or outside "Maximum" limits, then it could be a hardware issue with your modem, a Comcast issue, etc.



jaynick
lit up
Premium
join:2001-02-06
Sterling Heights, MI
kudos:2
Reviews:
·Comcast
reply to Johkal

said by Johkal:

said by owlyn:

At 9dBmv, your DS signal is too high. The acceptable range is +8 to -8. Call Comcast.

I beg to differ.

»Comcast High Speed Internet FAQ »What should my Signal Levels be?

For all modems:
-10 dBmV to +10 dBmV "Recommended".
-11 dBmV to -14 dBmv / +11 dBmV to +14 dBmV "Acceptable".
-15 dBmV & +15 dBmV "Maximum".

Are those specs still valid for D3 with bonded channels? IIRC, some folks here say no.


Johkal
Cool Cat
Premium,MVM
join:2002-11-13
Happy Valley
kudos:9

1 edit

1 recommendation

That's a good question. I've had no one provide me with verified DOCSIS 3.0 signal recommendations.

Too add:

I posted a question about this in the Direct Forum a while back:

SteveTeow See Profile responded with this: "I checked with netcool and the specs for "Signal Levels" FAQ should be the same for docsis 3.0 specs/recommendations as well. Nothing needs to be changed in the current FAQ."

That's all I've had to go on thus far.


Korriee

join:2012-09-16

Interesting

Downstream
Freq/Power: 597.000 MHz 9 dBmV
Signal to Noise Ratio: 37 dB
Modulation: QAM256
Upstream
Freq/Power: 22.600 MHz 44 dBmV
Channel Type: DOCSIS 1.x (TDMA)
Symbol Rate: 2560 kSym/sec
Modulation: QAM16



jaynick
lit up
Premium
join:2001-02-06
Sterling Heights, MI
kudos:2
Reviews:
·Comcast

1 recommendation

reply to Johkal

Click for full size
That's good enough for me. Then I won't sweat these.

Korriee

join:2012-09-16
reply to Johkal

ownstream
Freq/Power: 603.000 MHz 9 dBmV
Signal to Noise Ratio: 37 dB
Modulation: QAM256
Upstream
Freq/Power: 22.600 MHz 58 dBmV
Channel Type: DOCSIS 1.x (TDMA)
Symbol Rate: 2560 kSym/sec
Modulation: QAM16

Upstream power jumped up, is that whats causing frequent disconnects? (got these when the internet went out)



Johkal
Cool Cat
Premium,MVM
join:2002-11-13
Happy Valley
kudos:9

said by Korriee:

Upstream
Freq/Power: 22.600 MHz 58 dBmV
Upstream power jumped up, is that whats causing frequent disconnects? (got these when the internet went out)

I think you just caught the culprit.
Call Comcast Tech support. You have proof there is an issue either with your connection or the modem.
--
In God we trust; all others bring data!


Korriee

join:2012-09-16

1 edit

disregard