balt
join:2009-08-30
New Orleans, LA
1 edit | [LA] Having some connection issues recently in NOLA.jpg/thumb.jpg "54331 bytes")
not so good |  | |
Thanks in advance for any advice.
Following the guidelines, here's my info:
Cable Modem: SB5101U
Tier: Cox High Speed Internet Preferred
Signal Level: Varies (see below)
No splitters
I do have the modem connected to a router, but I removed the router from the loop for a day and still have the same problems.
So around two weeks ago I started having issues with dropped connections. The previous two years I've had no issues at all. The problem initially began during a storm, though I'm not sure that's related. Some days the connection is relatively smooth, some days it is awful, regardless of the weather. While initially I was only having problems with dropped connections, now I'm having dropped connections and severely reduced speed. After I first reported the problem to Cox, I was told to replace my modem with one that is DOCSIS 3 compliant.
I guess my question is: Is there any reason that a DOCSIS 3 modem would help if the problem is related to the building's network getting over-crowded? Would 3 help me with stability or throughput in this situation? If I must replace the modem, that's fine. I just don't want to drop $80 on a new one only to have the same problems.
Based on information I've read here, I started checking my modem's status page and logs. It seems like at least one of the upstream channels is fine, while the others are trashed (see images). Cox sent some techs out who said the signal levels were fine, but that there were some unusual signal readings in channels that aren't typically used by HSI (I'm paraphrasing here as I can't remember exactly what he said). He also rewired the wall outlet. They are coming out again next week to test the connection at the apartment building's entry point, and if they see the same issues there they were going to have someone look at the tap for the neighborhood.
Logs:
2013-10-04 22:54:32 6-Notice M572.0 Rng Rsp Abort Status - Reinitialize MAC...
2013-10-04 22:54:32 3-Critical R007.0 Unicast Ranging Received Abort Response - Re- initializing MAC
2013-10-04 22:47:54 6-Notice I401.0 TLV-11 - unrecognized OID
2013-10-04 22:47:47 5-Warning D004.1 ToD request sent - No Response received
2013-10-04 22:47:46 5-Warning D003.0 DHCP WARNING - Non-critical field invalid in response ;CM-MAC=3c:75:4a:ea:5c:e0;
2013-10-04 22:47:22 3-Critical R007.0 Unicast Ranging Received Abort Response - Re- initializing MAC
2013-10-04 22:46:56 6-Notice M572.0 Rng Rsp Abort Status - Reinitialize MAC...
2013-10-04 22:46:56 3-Critical R007.0 Unicast Ranging Received Abort Response - Re- initializing MAC
1970-01-01 00:02:45 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
1970-01-01 00:00:25 6-Notice I401.0 TLV-11 - unrecognized OID
1970-01-01 00:00:25 5-Warning D004.1 ToD request sent - No Response received
1970-01-01 00:00:18 5-Warning D003.0 DHCP WARNING - Non-critical field invalid in response ;CM-MAC=3c:75:4a:ea:5c:e0;
1970-01-01 00:00:08 6-Notice M571.1 Ethernet link up - ready to pass packets
Some speedtest results on the bad channel:
good
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 Optimus2357Premium
join:2010-11-21
West Warwick, RI
kudos:3 | Re: Having some connection issues recently in NOLA What is the timeframe between the first (not good) screen shot and the 2nd (good) screen shot? It almost looks like someone split off your line. Is that possible? My guess is a mistake or problem in the wiring closet in your apartment building. |
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balt
join:2009-08-30
New Orleans, LA | It was about an hour, IIRC.
I think what you've mentioned is a possibility. The building management told me that there was someone else in the building reporting a similar problem, but they are on a completely different floor.
On the other hand, I'm also beginning to wonder if my cable modem is dying. I tried replacing the coax cable and power cycling my modem, and this completely killed my connection. Now I've discovered that if the connector to the wall is too tight or too loose I have no connection at all. A quarter-twist makes all the difference, apparently. It feels kind of like having to jiggle a cord to get a better picture on a TV. Is it possible the tuner in my modem is fried (if it even has one)?
Also I edited my first post to put in into the [LA] group. So my original post is gone for the moment while it gets re-approved. Sorry about that. |
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 CoxTech1VIP
join:2002-04-25
Chesapeake, VA
kudos:75 | When a T3 error occurs the modem increases the transmit power level to try and re-establish communication with the CMTS. That being said the wide swings in transmit power you're seeing are likely the modem losing connection with us. It could be a modem issue or some sort of intermittent upstream interference issue. |
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balt
join:2009-08-30
New Orleans, LA | I guess I'll just wait and see then. I'll ask the techs on Monday to try a different modem and see if it can keep a stable connection and reach decent speeds (assuming it can be provisioned fast enough).
Thanks for the help, guys. |
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balt
join:2009-08-30
New Orleans, LA | reply to balt
Re: [LA] Having some connection issues recently in NOLA Well I didn't have anything else to do so I hooked up a new docsis 3 modem and had it provisioned just to see what would happen. While I'm not an expert at reading diagnostic pages, it looks like there are definitely some wires crossed somewhere. Hopefully the techs can figure it out on Monday. It seems odd that the problems would pop up seemingly out of nowhere on a Saturday night (two weeks ago), but maybe someone new moved in and just started using their internet for the first time. Thanks again for your suggestions. |
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 dvd536as Mr. Pink as they comePremium
join:2001-04-27
Phoenix, AZ
kudos:4 | upstream power is too hot! |
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