Erratic internet

[Mm888]

My service is erratic. Periodically I lose service. When I reboot the modem the us/ds blinks but never stays on.

[CCAndrew]

Post your modem levels

[Mm888]

Modem levels?

[CCAndrew]

Modem levels are the signal levels from Comcast that make your modem function. There’s a certain range they should fall in. Go inside your modem and look for them.

[EG]

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@Mm888 wrote:
Modem levels?

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More specifically. What do the modem's signal stats look like ? Try getting them here http://192.168.100.1 or here http://10.0.0.1

Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

[Mm888]

I cannot open the modem. I lack the tools

[EG]

"Tools" aren't needed. Use any web browser to go to those blue-colored links that I posted.

[Mm888]

The first site  will not open due to timeout

Downstream	Channel Bonding Value
Index	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32
Lock Status	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Not Locked	Not Locked	Not Locked	Not Locked	Not Locked	Not Locked	Not Locked	Not Locked
Frequency	459.00 MHz	429.00 MHz	435.00 MHz	447.00 MHz	453.00 MHz	465.00 MHz	471.00 MHz	477.00 MHz	483.00 MHz	489.00 MHz	495.00 MHz	501.00 MHz	507.00 MHz	513.00 MHz	519.00 MHz	525.00 MHz	531.00 MHz	537.00 MHz	543.00 MHz	549.00 MHz	555.00 MHz	561.00 MHz	567.00 MHz	573.00 MHz
SNR	37.64 dB	38.61 dB	37.36 dB	37.36 dB	37.64 dB	37.64 dB	37.36 dB	38.61 dB	37.64 dB	37.64 dB	37.64 dB	38.98 dB	38.61 dB	38.98 dB	37.64 dB	31.40 dB	35.08 dB	28.06 dB	26.15 dB	32.68 dB	32.32 dB	29.76 dB	34.93 dB	36.61 dB
Power Level	-11.30 dBmV	-10.70 dBmV	-11.20 dBmV	-11.50 dBmV	-11.50 dBmV	-11.50 dBmV	-11.40 dBmV	-10.70 dBmV	-10.60 dBmV	-10.50 dBmV	-10.80 dBmV	-10.60 dBmV	-10.10 dBmV	-10.30 dBmV	-10.80 dBmV	-11.30 dBmV	-11.60 dBmV	-12.40 dBmV	-12.60 dBmV	-13.00 dBmV	-12.50 dBmV	-12.10 dBmV	-12.20 dBmV	-11.30 dBmV
Modulation	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM

Upstream	Channel Bonding Value
Index	1	2	3	4	5	6	7	8
Lock Status	Locked	Not Locked	Not Locked	Not Locked	Not Locked	Not Locked	Not Locked	Not Locked
Frequency	35.80 MHz
Symbol Rate	5120 KSym/s
Power Level	57.00 dBmV
Modulation	64 QAM
Channel Type	DOCSIS2.0 (ATDMA)

[EG]

The downstream power is too low / out of spec. And the upstream power is WAY out of spec !! That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.

[Mm888]

So what do I do?

[Mm888]

Never mind  I missed the rest of your answer  thank you

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@Mm888 wrote:

So what do I do?

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[EG]

Good luck !

[Patjam77]

@CCAndrew, great problem solving and people skills there. Thank goodness for the guy volunteering his time to help the OP. smh no wonder Comcast is such a joke.