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Author Topic: My modem or my ISP?  (Read 415 times)
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Andrew Wonser
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« on: November 28, 2015, 01:49:29 AM »

Have been having a problem for maybe 5 weeks, been tracking it with a monitor for a month.

My internet connection dies for about 30 seconds and and then re-establishes. This only happens when more data than a ping occurs. So everything from simple browsing to downloading a file can trigger it. I will say prior to it being this bad I would sometimes get disconnects when viewing a certain website (No I'm not saying which, no it wasn't sexual/illegal) but everything else was fine.

I've seen my modem do one of two things. Either the status will turn orange, from green, with ethernet off but power and cable still on. Or all lights will be off with the exception of power. Yes I do have it connected to a router. No the router has never lost connection except when the modem does. Yes it does happen whether I am wired or wireless.

Just finished with a chat support session and they inform me that my modem is having many timeouts.

So right now I'm stuck. I could go out and purchase a new modem if it is indeed the problem. But I also know bigger isps will try to deflect their problem onto something else if they can.
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EngineNo9
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« Reply #1 on: November 29, 2015, 04:38:42 AM »

I used to have a similar problem in my last place.  It didn't drop all the time, but frequently enough to be a headache and it dropped wired and wireless connections from the internet at the same time. 

My old Netgear router had died so I bought a brand new, fancy, well-reviewed Acer router that I swore could not be the problem and it had to be my internet provider.  But nothing I did could ever get it to work consistently.  At wits end I replaced the router with a new version of my old Netgear router and the problem went away entirely. 

I never did really figure out what the problem was, but I guess the thing to learn is don't rule out anything.  If you have a spare (or a store with a liberal return policy) you could try swapping out your modem and/or router and test for a week or two?
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Punisher
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« Reply #2 on: November 30, 2015, 08:10:48 PM »

If possible, plug in your PC directly to the modem and test. If it fails, start with modem replacement.
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Andrew Wonser
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« Reply #3 on: December 01, 2015, 01:19:57 AM »

I went ahead and bit the bullet and ordered a new modem. Old one was docsys 1.0 and this one will be 3.0 so I might see better speeds. Was ordering parts to build a htpc anyway so what's another 60 (wallet cries).
Just for kicks here was an event log
Quote
Index    Date/Time    ID    Level    Text
26   11/29/15 20:18:26   C206.0   critical   DCC aborted unable to communicate on upstream channel
27   11/29/15 20:18:32   U02.0   critical   UCD invalid or channel unusable
28   11/29/15 20:18:40   R02.0   critical   No Ranging Response received - T3 time-out
29   11/29/15 20:18:56   D04.1   warning   ToD request sent - No Response received
30   11/29/15 20:20:42   R05.0   critical   Started Unicast Maintenance Ranging - No Response received - T3 time-out
31   11/29/15 20:20:44   C401.0   error   DCC-ACK not received
32   11/29/15 20:20:56   R02.0   critical   No Ranging Response received - T3 time-out
33   11/29/15 20:21:26   R04.0   critical   Received Response to Broadcast Maintenance Request, but no Unicast Maintenance opportunities received - T4 timeout
34   11/29/15 20:21:26   C206.0   critical   DCC aborted unable to communicate on upstream channel
35   11/29/15 20:21:29   U02.0   critical   UCD invalid or channel unusable
36   11/29/15 20:21:38   R02.0   critical   No Ranging Response received - T3 time-out
37   11/29/15 20:21:54   D04.1   warning   ToD request sent - No Response received
38   11/29/15 20:24:42   R05.0   critical   Started Unicast Maintenance Ranging - No Response received - T3 time-out
39   11/29/15 20:24:44   C401.0   error   DCC-ACK not received
40   11/29/15 20:24:56   R02.0   critical   No Ranging Response received - T3 time-out
41   11/29/15 20:25:26   R04.0   critical   Received Response to Broadcast Maintenance Request, but no Unicast Maintenance opportunities received - T4 timeout
42   11/29/15 20:25:26   C206.0   critical   DCC aborted unable to communicate on upstream channel
43   11/29/15 20:25:31   U02.0   critical   UCD invalid or channel unusable
44   11/29/15 20:25:39   R02.0   critical   No Ranging Response received - T3 time-out
45   11/29/15 20:25:53   D04.1   warning   ToD request sent - No Response received
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hitbyambulance
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« Reply #4 on: December 12, 2015, 05:33:55 AM »

i had similar issues at a previous house - it was due to the coax cable running in the house not being 'cable' grade (only 'antenna' grade). seemed to occur more frequently in warmer weather.
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7zark7
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« Reply #5 on: January 07, 2016, 07:57:46 PM »

Just curious to see if the new modem did the trick. I had T3 and T4 timeouts like that for almost 2 years before my isp finally rolled a maintenance truck out to our neighborhood and cleaned up some of the noise (old amplifiers I think). I also bought a new modem during that time and while it helped a bit it did not make the problem go away completely.
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