1200 Mbps only after a manual power cycle

Hey guys my 1200 Mbs drops to 90 Mbs or lower, I unplug the modem and back in and I get the 1200+ Mbs some times it stays for a few hour but most of the time it drops down after about a half hour tech checked my line speed was getting 1300+ on it I was hopping it would clear up after all the Meantness that was show in my area but still not getting full speed unless I power cycle the modem

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Responses

Accepted Solution

BruceW

Gold Problem Solver

•

26.5K Messages

4 years ago

Are you connecting via Wifi or Ethernet? If Wifi, it's best to switch to an Ethernet cable connection if possible for testing. That would allow you to determine whether the problem is the Wifi signal or the link between your modem or gateway and Comcast's network. Network connection problems that affect both Ethernet and Wifi devices are often due to poor coax connections or damaged coax cable, usually in or near your home. Such problems are often intermittent, which makes them hard to find.

If you want to troubleshoot this yourself, please see https://forums.xfinity.com/conversations/your-home-network/connection-troubleshooting-tips/602da777c5375f08cdea3db9. If you still need help, please post the following information from your modem or gateway:

model number
downstream power levels and SNR
upstream power levels
event log, if accessible

If you can't find and fix the problem yourself there isn't much else you can do except keep leaning on Comcast until they take care of it.

1

Graymin

Contributor

•

22 Messages

4 years ago

@BruceW

Ya its Ethernet connection 2500/2500 linkspeed checked speed and 1384 Mbs this morn lol

and I didn't have to power cycle

Cable Modem

HW Version:2.0

Vendor:Technicolor

BOOT Version:S1TC-3.63.20.104

Core Version:1.0

Model:CGM4331COM

Product Type:XB7

Flash Part:8192 MB

Download Version:Prod_20.2_d31 & Prod_20.2

Serial Number:304930030296104645

Downstream	Channel Bonding Value
Index	20	17	18	19	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48
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	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked
Frequency	555 MHz	537 MHz	543 MHz	549 MHz	561 MHz	567 MHz	573 MHz	579 MHz	585 MHz	591 MHz	597 MHz	603 MHz	609 MHz	615 MHz	621 MHz	627 MHz	633 MHz	639 MHz	645 MHz	651 MHz	657 MHz	663 MHz	669 MHz	675 MHz	681 MHz	687 MHz	693 MHz	699 MHz	705 MHz	711 MHz	717 MHz	805000000
SNR	39.3 dB	29.9 dB	30.8 dB	36.5 dB	42.3 dB	42.2 dB	42.1 dB	42.1 dB	42.2 dB	42.0 dB	41.9 dB	41.9 dB	41.7 dB	41.6 dB	41.6 dB	41.3 dB	41.6 dB	41.3 dB	41.5 dB	41.3 dB	41.4 dB	41.4 dB	41.6 dB	41.0 dB	41.4 dB	41.3 dB	41.4 dB	41.5 dB	41.5 dB	41.5 dB	41.5 dB	NA
Power Level	1.1 dBmV	1.0 dBmV	1.0 dBmV	1.1 dBmV	0.9 dBmV	0.7 dBmV	0.5 dBmV	0.5 dBmV	0.5 dBmV	0.5 dBmV	0.5 dBmV	0.4 dBmV	0.0 dBmV	0.1 dBmV	0.0 dBmV	0.0 dBmV	0.1 dBmV	0.0 dBmV	0.1 dBmV	0.2 dBmV	0.4 dBmV	0.1 dBmV	0.0 dBmV	0.1 dBmV	0.3 dBmV	0.5 dBmV	0.4 dBmV	0.3 dBmV	0.2 dBmV	0.1 dBmV	0.1 dBmV	NA
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	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	256 QAM	OFDM

Upstream	Channel Bonding Value
Index	1	2	3	4	5
Lock Status	Locked	Locked	Locked	Locked	Locked
Frequency	16 MHz	22 MHz	29 MHz	35 MHz	40 MHz
Symbol Rate	5120	5120	5120	5120	2560
Power Level	47.8 dBmV	48.0 dBmV	48.8 dBmV	48.8 dBmV	49.3 dBmV
Modulation	QAM	QAM	QAM	QAM	QAM
Channel Type	ATDMA	ATDMA	ATDMA	ATDMA	ATDMA

CM Error Codewords
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
Unerrored Codewords	499817784	1069664972	1069674389	1069679951	1069687411	1069693232	1069701446	1069707016	1069715883	1069722883	1069729807	1069735892	1069743293	1069749886	1069757086	1069763625	1069775503	1069782405	1069789411	1069792997	1069799719	1069806327	1069812934	1069819574	1069826039	1069832727	1069839211	1069845688	1069850229	1069853657	1069858494	499817784
Correctable Codewords	450153312	3431	169	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	450153312
Uncorrectable Codewords	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

This comment was created from this reply

0

BruceW

Gold Problem Solver

•

26.5K Messages

4 years ago

The downstream signals look very good, except for the 537-543 MHz SNR, which is out of spec (too low).

The upstream power levels are high-ish. If they are fluctuating above 50, that would cause problems. There are other signal values that only Comcast can check.

Can only suggest you keep an eye on the upstream power readings, and/or have Comcast come back out for another look at the problem.

Good luck, and please let us know how it goes!

(edited)

0

Graymin

Contributor

•

22 Messages

4 years ago

well it was fine for a week now its back at having to reboot the modem every few hours guess its time for a tech to come out again

3

0

EG

Expert

•

111.5K Messages

@Graymin

As an FYI here.

Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home.

Good luck !

I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

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4 years ago

0

C

CL303

Visitor

•

1 Message

did you get this resolved yet? we are having a similar issue where in the PM we either get constantly kicked offline with speed tests sitting at 10Mbps to 150Mbps. During the day we see upwards of 900Mbps but almost never the 1200. We've had multiple tech visits and they can't figure it out.

4 years ago

0

CCAlisha

Problem Solver

•

571 Messages

Hello, @CL303 We would love to assist you with your speed concerns. Please create your own public post outlining your troubles so, we can take a look!

I no longer work for Comcast.

4 years ago

0

Your Home Network

Graymin

1200 Mbps only after a manual power cycle

BruceW

Graymin

Cable Modem

BruceW

Graymin

EG

CL303

CCAlisha

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