Topic 'comcast intermittant disconnects' in forum 'Comcast HSI' - dslreports.com

Re: comcast intermittant disconnects

Wed, 08 Jul 2009 15:40:26 EDT

wanger posted : I know there are posters here that can be helped via this forum. The OP's post sounded a bit irritated/cocky without looking further for information to help resolve the issue. You are correct, there are other means but if a person who did a tiny bit of google searching they would have found a lot of the information on these forums already stating such information. Didn't mean to be too hard on the OP. ;)

Re: comcast intermittant disconnects

Wed, 08 Jul 2009 01:24:27 EDT

anon posted : Well i dont knwo what caused it, but looks like something made the signal weaker on my line. i ripped out the old down lead that's been in use for a good while and i got a 2db boost to signal, which it now seems to be happy. I guess the local feed got weaker somehow.

thanks for the help and pointers!

Re: comcast intermittant disconnects

Tue, 07 Jul 2009 20:01:15 EDT

EG posted :

said by wanger:

Ultimately, either purchase a SLM and learn how to use it or contact Comcast to have someone come out and troubleshoot the issue.

I think that there are some in betweens here ?

Many posters have been helped via these forums, no ?

Re: comcast intermittant disconnects

Tue, 07 Jul 2009 19:55:59 EDT

wanger posted : Could be a modem going bad or a line going bad. One or the other or both. I would swap out the modem and make sure all connections are tight. Then go from there... As for using a linux router and OS, Comcast only supports Win 2K and above and Mac 10.4 OS or above. Linux and other similar OS are the customer's responsibility since it is an "advanced" OS and Comcast doesn't have the ability to support a multitude of operating systems.

Ultimately, either purchase a SLM and learn how to use it or contact Comcast to have someone come out and troubleshoot the issue.

Re: comcast intermittant disconnects

Tue, 07 Jul 2009 19:55:51 EDT

EG posted : No worries. :)

It is obvious that this poster is indeed having some sort of connectivity issue..

Re: comcast intermittant disconnects

Tue, 07 Jul 2009 19:12:53 EDT

koshoka posted : Ummm yeah I think you're right EG....

Re: comcast intermittant disconnects

Tue, 07 Jul 2009 18:28:29 EDT

EG posted : I'd have to say that that 22dB SNR figure can't be relied on as being accurate at that point as there is no channel ID number indicated yet, therefore there is no downstream lock and things are still ranging.

"Downstream Status
Not Ready"

"Channel ID
0"

Re: comcast intermittant disconnects

Tue, 07 Jul 2009 18:15:17 EDT

koshoka posted : You have to track down the noise. You need a tech to come out.

Re: comcast intermittant disconnects

Tue, 07 Jul 2009 18:10:21 EDT

anon posted : thanks for the reply. its a direct feed from the line. no splitters. Twin wire feed in, one wire of feed coupled direct to single wire on side of house. single wire up to room with cablemodem in.

current RX/TX

Receive Power Level -4.6 dBmVTransmit Power Level 41.7 dBmV

Re: comcast intermittant disconnects

Tue, 07 Jul 2009 17:40:34 EDT

wozz007 posted : signal to noise looks to low when its dropping out, thats a signal level issue, looks like you dipping out at times causing the T3, that is a line tech. Check and make sure you dont have any extra splitters between the modem and the main splitter, also check all your connections back to the main splitter.

comcast intermittant disconnects

Tue, 07 Jul 2009 17:08:52 EDT

anon posted : This is becoming tiresome. Daily, several times an hour, the connection will drop. dometimes its noticeable only as a bit of packet loss, but sometimes it happens long enough for the cablemodem to loose lock with the headend and reset everything.

I called tech support, only to find that because i run a linux router and not a piece of branded hardware, that the techs cant really help me. Ive tried explaining that ths issues appear between the cablemodem and the network, but they are having none of it. Any ideas of someone at comcast who knows what they are talking about?

When things are operational, the stats are

Receive Power Level -6.1 dBmVTransmit Power Level 41.7 dBmVCable Modem Status Operational

and when everything drops

Downstream Status Not ReadyChannel ID 0Downstream Frequency 771000000 HzModulation 256QAMBit Rate 42884296 bits/secPower Level -4.0 dBmVSignal to Noise Ratio 22.8 dB

it jumps around the frequencies trying to lock. none work.

Then after a few minutes, bam, we get a downstream agian

Downstream Status LockedChannel ID 3Downstream Frequency 825000000 HzModulation 256QAMBit Rate 42884296 bits/secPower Level -3.9 dBmVSignal to Noise Ratio 36.8 dB

and then we see the regular status window. My logs show only the times the modem was offlined. Heres todays

Tue Jul 07 13:02:24 2009   Critical (3)  Received Response to Broadcast Maintenance Request, But no Un...  Tue Jul 07 13:02:38 2009   Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/Q...  Tue Jul 07 12:41:19 2009   Critical (3)  Received Response to Broadcast Maintenance Request, But no Un...  Tue Jul 07 12:39:19 2009   Critical (3)  No Ranging Response received - T3 time-out  Tue Jul 07 12:39:13 2009   Critical (3)  No UCD's Received - Timeout  Tue Jul 07 12:37:56 2009   Critical (3)  Received Response to Broadcast Maintenance Request, But no Un...  Tue Jul 07 11:09:23 2009   Critical (3)  Started Unicast Maintenance Ranging - No Response received - ...  Tue Jul 07 08:30:15 2009   Critical (3)  No Ranging Response received - T3 time-out  Tue Jul 07 08:27:14 2009   Critical (3)  Received Response to Broadcast Maintenance Request, But no Un...  Tue Jul 07 07:50:41 2009   Critical (3)  No Ranging Response received - T3 time-out  Tue Jul 07 13:02:42 2009   Critical (3)  SYNC Timing Synchronization failure - Failed to acquire FEC f...

To me this looks like the headend has something up. Or am i missing something else?