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Cable internet connection constantly timing out -- Help me!!

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  • Internet Service Providers
  • Internet Connection
  • Cable
  • Internet
  • Networking
Last response: in Networking
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April 5, 2006 3:20:55 AM

I have cable internet through Insight Communications, and after about eight months of good service my internet just started dropping for no reason that I can see. They've sent a tech out, who's read my receive/send signal strengths and my SNR, all of which are in spec. I've replaced my modem twice, reformatted and reinstalled everything. The only thing I can find is in the event log, I'm getting a lot of ranging, a lot of t3 timeouts, a lot of DHCP failures ... all of which correspond to the times I'm experiencing internet issues. I'll post the events. Is this something that's going on because of an issue on my end, or is it a problem with my ISP. I feel like I'm getting the runaround. I'm being constantly told it's my hardware or software, which seems kind of open-ended and ambiguous. Just something they can tell me to take the blame off themselves because they don't really know what's going on. Thnkas for any help you guys can give me, it's been a frustrating couple of months.

Event log:

Wed Apr 05 02:08:17 2006 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Wed Apr 05 01:52:20 2006 Error (4) Improper Configuration File CVC Format
Wed Apr 05 01:52:20 2006 Notice (6) TLV-11 - unrecognized OID
Wed Apr 05 01:52:18 2006 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Wed Apr 05 01:52:04 2006 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Wed Apr 05 01:51:32 2006 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Wed Apr 05 01:48:24 2006 Error (4) Improper Configuration File CVC Format
Wed Apr 05 01:48:24 2006 Critical (3) REG RSP not received
Wed Apr 05 01:48:18 2006 Notice (6) TLV-11 - unrecognized OID
Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Tue Apr 04 03:00:11 2006 Critical (3) REG RSP not received
Tue Apr 04 03:00:04 2006 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Tue Apr 04 02:59:49 2006 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Tue Apr 04 02:59:16 2006 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) REG RSP not received
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Critical (3) DHCP FAILED - Request sent, No response
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) No Ranging Response received - T3 time-out

More about : cable internet connection constantly timing

April 5, 2006 3:03:43 PM

Couple questions...
Do you have a device between their equipment and yours (ie. a linksys or dlink router or something?) If so do a factory reset on it and reconfigure.

Have you done a Tracert on some internet site to see if there is a lag at some hop?

They only thing you can do to prove that you dont have an issues is replace what you can... NIC, cables and try a different slot on the Mobo. Especially since you said that you already did a rebuild.

Good luck!

and ps... its usually the provider...
April 5, 2006 8:38:38 PM

I do have a Motorola WR850G wireless router, however, I still run into the problem when I connect directly through the modem. My nic's integrated directly into the motherboard, so I can't really move it around a whole lot. I do have wireless and I tried changing pci's slots and connecting with it, but still my connection has issues. I also connected through the USB port with the modem, and no change. I've replaced the cables. Replaced the modem twice like I said, and also run into the issue on other computers when directly connected through the modem or the wireless. The ISP still maintains that it's my problem, and simply isn't helping me.

I have done a tracert, and when my connection works I'm not seeing any substantial lag. When I drop, I'm not connected so I can't really do a trace route without a gateway to the internet. Every once in a while I'll see a time out or two on a hop, but like I said nothing major. My sister and her boyfriend both manage and design largescale networks and they've said I've done about everything I can to prove it's not a problem on my end.

From what I can tell from my modem's error log I'm trying to communicate with my ISP and not receiving a response. This causes my modem to resend the information the preset number of times and eventually time out and terminate the connection. I don't know if this is causing me to ghost and appear to still be connected, which is why I can't establish an IP through DHCP at times. I don't even know if that's possible, though it would explain why all they say they're seeing are resets and not me dropping offline. I just want to make sure I have some idea of what I'm talking about before I say hey look this is what's going on and then end up looking like a jackass when I'm wrong.
Related resources
July 3, 2008 7:39:23 PM

July 10, 2008 UPDATE to Original post below.

After 3 days of perfect performance the problem came right back. Thus a new splitter is not the answer. So I reluctantly called the cable company (Optimum online - Cablevision) and spoke with a tech. She actually seemed pretty competent and she noted (as I knew she would) that there was "no problem on their end." UGH!!! What a shock! However, she did provide some good insight (believe it or not :)  ), assuming she was telling the truth. First she noted that the cable modem on my end had been up for 5 days without interruption (even though I had been getting knocked off). In addition, she noted that when you are using a Linksys wireless router (like I am, WRT54G) that when you are looking at 192.168.100.1 you are looking into the router, not the modem. Based on this information I concluded with her on the phone that if I have more of the same problems then I should hardwire via ethernet cable from my PC to the modem and if it is the router that is bad, bypassing it via ethernet cable should resolve the problem. She agreed and said that if it didn't then call back and she would be able to provide additional insight as then she would be looking into me being connected directly to the modem instead of via the router.

In the meantime I have also updated the firmware on my WRT54G to the latest version which I did not have on the router (available at the Linksys website). I don't know that it's helping though as the errors are starting again this AM.

The OTHER factor that I am contending with is that it seems that everytime I trun on a TV in the house the errors start. I have my TV's attached via a amplified splitter and I am begining to suspect that the amp splitter is causing signal noise back though the cable line and that the router is picking it up as it is only a few feet away.

Well just looked at my log and the errors are begining to start again.....the last comment is that I think there may be a time of day network congestion issue as the problems I have are usually 8:30 AM to 6:00PM.

More to report later....I am going to go direct via ethernet now and see of the problems go away.






I have a solution to this problem.

I had exactly the same problem. Just popped up out of the blue a few weeks back -- my internet connection would go down about every 20 minutes, some times more frequently, somethimes less. A sample of my error log is below:

2008-07-02 12:22:45 3-Critical 0x040D9A2C DHCP WARNING - Non-critical field invalid in response.
2008-07-02 12:22:42 3-Critical 0x040D9964 DHCP FAILED - Discover sent, no offer received
2008-07-02 12:22:31 3-Critical 0x04E33948 No Ranging Response received - T3 time-out
2008-07-02 12:22:13 3-Critical 0x04E33A10 Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 timeout
2008-07-02 12:21:41 3-Critical 0x04E33A74 Started Unicast Maintenance Ranging - No Response received - T3 time-out
2008-07-02 12:18:21 3-Critical 0x040D9A2C DHCP WARNING - Non-critical field invalid in response.

After much thought I did three things:

[1] I loosened and retightened all my F connectors. At the drop outside and at the two way splitter that takes one leg to the cable modem and the other leg to my 4-way amplified splitter for my TV's.

Result = NG

[2] Next I made up a new RU6 cable to run from the modem to the splitter thinking the old cable might be shot.

Result = NG

[3] I REPLACED THE TWO WAY SPLITTER

Result = NO MORE PROBLEMS

Apparently these little puupies can and do go bad. In addition, I have seen where cable techs recommend not using gold plated splitters -- my old one was gold plated made by GE.

Problem solved and no a single friggin' error in the past 48 hours. Incidentally my modem is a 2002 SB5100 and my service is Optimum Online in Morris County NJ. Also running through an AT&T VOIP ATA and a Linksys wireless router.
Anonymous
July 9, 2008 3:44:57 PM

Hi all

I have exactly the same problem!

I am a UK VM BB Customer and have been having exactly the same issues.

This situation was almost unbearable at one stage. I've managed to make some improvements however, by:

Replacing my modem to Ambit 256 model
Replacing my Router (new NETGEAR Router), continue to use wired connection
Use Powepoints from the wall for modem and router (rather than extension cable)
Replace the short coaxle cable formally used for my tv with the longer cable used for my modem

This has reduced the packet loss / drops by about 40%, but the problem remains.

I've noticed from my modems log that everytime i have a problem, it coincides to the exact minute in which I have an attempted UNICAST MAINTENACE which fails everytime

educashun_viktum, have you had any resolution of this annoying (to say the least) problem?!?!?
Anonymous
July 9, 2008 3:45:50 PM

btw! I have also tried running the connection completely bypassing the two-way splitter. Same Problem!
July 9, 2008 7:34:17 PM

I was having similar problems with my Charter cable internet connection. I eventually replaced my Linksys modem with an Motorola Surf Modem, replaced the splitters, had the useless cable tech rep come out and check the line (s). It got a little better.

Then one day during stormy weather, I went out side and visually checked the cable from the pole to the house, etc.

One thing I did was get out my pruning saw on a pole and cut away all the tree limbs that were near or rubbing on the cable. I think that helped a lot.

Charter Cable tech support is useless to worse. So bad they are written up in computer magazines as being at the bottom of the list for tech support. You get somebody in the Phillipines reading from a script or book from which they are incapable of varying from. You're lucky if you can understand their English also.
November 29, 2008 2:37:46 AM

I too am having this problem, I am a former charter service technician, so needless to say this is a very dificult problem to fix. With my problem I have noticed as well with certian times of the day it's worse, say around 8am and around 5pm . I have bought 2 new modems and they both have same issue (Started Unicast Maintenance Ranging - No Response received - T3 time-out) Charter Communications is My ISP so customer sevice is piss poor, I still do have connections with my former managers and I assure you all, I will fix this problem, or be getting internet for free for awhile, anyway, I suspect the problem is in the MAINLine a bad hardline or possible amplifier, I am having a System Tech come over to replace the distribution amp tha feeds my area, However I have a suspicion that the problem could be headend related, I have spoken with motorola to see exactly what this error is but once again they have no freakin clue ,go figure,, ANY way the SAGA continues


PS My downstream and upstream are perfect, no long runs of cable, all brand new cable, regal splitter, so I wouldn't spend a lot of time buying new cable or splitters, unless it's visibly damaged.
December 4, 2008 4:30:21 AM

I am having the same issues with my Linksys WCG200v2 and Cox Communications. Cox is saying that it's the gateway and Linksys is saying that it is Cox and that Cox can push a hot patch to my router to correct the issue.

For me the problem affects my work. I am network technician that works out of my home office. This problem occurs frequently during the course of work causing me to lose connection to my CRM, connection to our messenger system, and connection to telephony software. Not a good thing when you are in the middle of a call.

The gateway was exchanged as defective with like model and the same issue. So I know now it was not the gateway but something with what is being sent to the modem that causes the recycling.

Other facts on this:
1. We have 2 internet connections in the same home using Cox. The primary is using a Scientific Atlantic modem. It's only issue is that the speed is lower than what it is provisioned for. It is provisioned for 20mb/s but gets only 9mb/s. I am provisioned for 10mb/s and get 9.2mb/s.
2. Our cable is buried from the PIP to the box at the house. Part of the cable is no longer buried but exposed on stone covered patio area. The cable company is supposed to install a new feed from the PIP to the house. I will see if that clears this problem and the lower speed of the other internet service as well as issues with the digital TV that becomes pixelated from time to time.

If this was on the router side of the gateway, I'd shut down the router side and add a router for the wireless but I am not thinking that is the issue.
December 27, 2008 12:36:38 PM

**** man i can't a imagin that this many people have the same problem i replace the modem and the router bu the problem continued i'm going to ask the tech who is coming to to replace my two way spilitter and see what happens my hard line was replaced too guys we need to solve this problem .
January 26, 2009 10:59:38 AM

ok, ive had the same error for some time now. The technichian came today and he called the HQ ansking about the T3 timeout error and they told him that its all about the condensed lines. They will be doing some upgrades on the main central for my part of town on this wednesday which should loosen the lines. So if i get no more drops in speed for a week, then this is it. Simple as that. If not, we're screwed.. i'll keep u posted...
January 30, 2009 8:33:41 PM

..so its been 3 days since the network upgrade and i had no drops in speed yet. I still get the T3 errors though, but it doesnt really influence on the net speed.. So it all comes down to your ISP.. and you can only hope that they will do their maintinance on their lines when needed..
February 14, 2009 11:10:09 AM

..it has been couple of weeks now and my net is working fine. So myth confirmed :) .
March 26, 2009 9:50:28 PM

I have the same problem with intermittent connection issues and same errors in my cable modem log. Connection will stop right in the middle of browsing but cable modem lights still blink normal operation.
Use Comcast cable near Harrisburg, PA. RCA DCM425 cable modem. Belkin F5D7230-4 router. Comcast changed the drop-line from pole to my house, changed splitters, changed internal cable, and exchanged cable modem.
I removed router and directly connected to cable modem with various computer systems. STILL having connection issues.
They’re now trying to check the wires beyond my drop-line. Hope this helps.
I think Comcast support has been fine but if they cannot fix the problem, I’m changing to Verizon fios.
March 30, 2009 5:42:31 PM

cogent1 said:
I have the same problem with intermittent connection issues and same errors in my cable modem log. Connection will stop right in the middle of browsing but cable modem lights still blink normal operation.
Use Comcast cable near Harrisburg, PA. RCA DCM425 cable modem. Belkin F5D7230-4 router. Comcast changed the drop-line from pole to my house, changed splitters, changed internal cable, and exchanged cable modem.
I removed router and directly connected to cable modem with various computer systems. STILL having connection issues.
They’re now trying to check the wires beyond my drop-line. Hope this helps.
I think Comcast support has been fine but if they cannot fix the problem, I’m changing to Verizon fios.


Cogent1, please let me know what happens, I too am in Harrisburg, using Comcast, with the exact same problem you're having. I don't have the same modem as you, but I do have the exact same router. Maybe it's something with that. I've tried resetting, updating firmware, etc, but still have the same problem with my connection.

Thank you!
May 13, 2009 3:33:23 AM

believe it or not but it is on the isp side. I have been having the very same types of problems. What the fix is, a very good line person or a tech who will take the time to check all connections down the line till they find the problem. What it is, your modem can not hear the isp send signal from the headend. That is why you are gettingt the T3 timeouts. If the modem can not get or hear the signal it will shutdown cause it thinks there is a problem with the headend. I always switched out modems and routers because I was always told that it was on my end. I asked how many times in a year I am supposed to have new cable and ends replaced before they would finally believe it was on their end. Anyways, I got really mad and contacted a VP in the cable company home office and asked for his help. All I know I got the problem fixed and several techs oin the support center back taking remidial training on how to listion to customers and field techs who finally took the time to look at everything to find the problem. It was a connection 5 blocks from me that was giving trouble.
May 28, 2009 12:01:27 AM

Its True what stubby just said! You need a tech who will take the time OR HAS TIME!!!!!! I was a TECH for charter and were kinda slam for time !!! every one wants there stuff and you better be on time the next person doesnt care what the other has wrong with there cable lines they just what there stuff done!!!!! Sence I cant look at your line and run down the problem here is some things you can look at! 1 do you have a amp on your line you should never have a amp on a Internet or phone line it will mess your signal up! 2 it could be your drop line! the line going to your house !!!! Like stubby said you need a tech who has time to come out!!!!! If I was to do it I would run a new line from your modem to the outside box then check you drop!!! But thats just me! good luck!
June 11, 2009 3:30:03 PM

I have this SAME exact issue. I reset the modem, had them reset it from their end, had a tech out yesterday who replaced the modem with a completely different brand and model. He also did his little testing with some machine in a bag and said that everything with the line seems perfect. I still have the problem.

I just called the tech team at Charter at 888-438-2427. It seems that none of these techs care one iota about the log file on the actual modem. They all chalk it up to the modem rebooting. They're going to send out another tech to trace the lines tomorrow. Lets hope that pans out! This thread has helped quite a bit! Thanks everyone!
July 18, 2009 8:24:06 AM

I think i have the same problem as u guys. I have charter. Up until about a month ago the internet was fine. Suddenly one day i wanted to play xbox live and every single game was lagging bad. I also kept getting server connection errors on game consoles a lot and would take a few tries for stuff to load. I thought it was my xbox or the router but when i connected directly to the modem it stilled lag. when i restarted the modem the gameplay was normal for about 10-25 minutes and then the lag started again. I also noticed quite a few more page load errors when i surfed the web and video sites like hulu took longer to buffer and load, but connection didn't seem any slower surfing regular sites. I did several speed tests and they all came back normal with speeds up/down of 5.00mb/s and 0.5mb/s upload. Ping is near 10ms. I had the tech come to my house twice. First time he told me that the line going outside my house was damaged and he replaced it. Problem still persisted. Second time he came and replaced the modem and said that the problem was underground or somethin and the houses next to me were getting the same errors. I checked the modem's log and the t3 timeout error popped up a few times. The tech said that engineers would have to look underground to see what the problem is and other crap. It's been 3 days since he came and still no fix. Online gaming is now impossible. Nobody seems to know what the hell is wrong with my connection. I would change to another ISP but unfortunately in my neighborhood Charter has the monopoly on broadband. No other broadband isp is available in my area. No verizon dsl or att.
July 23, 2009 6:22:23 PM

Insightbb is my provider in Northern Kentucky. Last night I tried to upload image files to a web host and the host timed out the upload. I can't upload anything larger than an htm file or email. According to insight's own online speed test my download speed in 10.26Mpps and my upload speed is 117.33Kpps...

They say everything is fine... "some packet loss" and are sending a guy out on Monday.

I use a Mac... I don't have any spyware or viruses and I've plugged the RCA DCM425 modem directly into the machine, bypassing the router.

The repair man is going to come out and the only thing he is going to do is replace the modem (that's what I expect will happen).

Sounds like my problem is exactly the same... and it isn't going to be a modem issue...

Any updates on your end? Thanks, Mark
July 24, 2009 6:09:48 AM

Oh, I thought it is only me who is having a terrible time with the Comcast cable, but am glad to see a lot of compadres...
I've been very loyal to the AT&T DSL and had no problem at all for so many years, but I'm trying to switch to the Comcast Cable just for better speed.
I had ordered it 2 nights ago and picked up the RCA modem yesterday, but couldn't install it (Cable connectivity failed) and wasted a half day. The RCA modem diagnostic does not provide the signal information, and I suspected the modem DOA.
I swapped it with the WebStar modem today, and wasted another half day. Sigh~
I noticed that all my signal levels are in the right range, but there are a lot of 'No RANGING Response time-out' error messages in the log.

After reading all your responses, I'm pretty confident that it is a problem between my wall and the ISP. I have an appointment with the technician on Saturday, and I will ask them to send someone who is good at the line troubleshooting.
Also, I will try to connect the cable modem directly to the connector outside of my house, bypassing all the internal wiring.

Btw, I don't want to spend $3.00/month for the modem lease, so I have ordered the Motorola SB5101 Cable Modem, without thorough investigation. Is it good enough (better than RCA or WebStar)?
Anonymous
September 5, 2009 12:30:55 AM

I know how to fix this. DSL. It's not quite as fast but it's damn sure close enough. If I'm tryin to tank a boss on Warcraft or jack off to some nasty porn, or trade a hot stock at a critical moment I know with DSL my signal's not gonna get dropped and botch the whole operation.

This is a problem of laziness, greediness, and lack of commitment to providing quality service beyond the point of sale on the behalf of the major cable companies.

I'm not bundlin ***! They'll be lucky if I don't switch to dish out of spite, although at the very least I can say I'm pleased with cable television. But let these corporate, run around dealin, red tape slingin, buck passin, smug thugs have a monopoly on three of my "critical" entertainment avenues? That'll be a cold day in Hell!
September 14, 2009 12:39:56 PM

csjo1113 said:
Oh, I thought it is only me who is having a terrible time with the Comcast cable, but am glad to see a lot of compadres...
I've been very loyal to the AT&T DSL and had no problem at all for so many years, but I'm trying to switch to the Comcast Cable just for better speed.
I had ordered it 2 nights ago and picked up the RCA modem yesterday, but couldn't install it (Cable connectivity failed) and wasted a half day. The RCA modem diagnostic does not provide the signal information, and I suspected the modem DOA.
I swapped it with the WebStar modem today, and wasted another half day. Sigh~
I noticed that all my signal levels are in the right range, but there are a lot of 'No RANGING Response time-out' error messages in the log.

After reading all your responses, I'm pretty confident that it is a problem between my wall and the ISP. I have an appointment with the technician on Saturday, and I will ask them to send someone who is good at the line troubleshooting.
Also, I will try to connect the cable modem directly to the connector outside of my house, bypassing all the internal wiring.

Btw, I don't want to spend $3.00/month for the modem lease, so I have ordered the Motorola SB5101 Cable Modem, without thorough investigation. Is it good enough (better than RCA or WebStar)?



+++++++++++++
I have the same problem with Comcast in Auburn GA, I had no issue with my Internet for 3 years and one day out of the blue mayor issue. see below!!

2009-09-13 23:41:20 3-Critical R002.0 No Ranging Response received - T3 time-out (US 1)
2009-09-13 23:41:15 6-Notice M572.0 Max T3 No Rng Rsp Timeouts - Reinitialize MAC...
2009-09-13 23:41:15 3-Critical C206.0 DCC aborted unable to communicate on new upstream channel
2009-09-13 23:41:15 3-Critical R006.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted
2009-09-13 23:41:15 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out

This is a True Comcast network problem you do not have to change any cable modems or routers in your house. The issue is outside of your house. What you see in your cable modem is a soft reboot "Max T3 No Rng Rsp Timeouts - Reinitialize MAC..."

I had Comcast out in our Sub Division for days working a this same issue and they resolved for 5 days but now it is back. I have a new work order open.

Keep the pressure on Comcast to fix the issue.

I feel your pain...

Keep us posted.
September 14, 2009 12:49:12 PM

csjo1113 said:
Oh, I thought it is only me who is having a terrible time with the Comcast cable, but am glad to see a lot of compadres...
I've been very loyal to the AT&T DSL and had no problem at all for so many years, but I'm trying to switch to the Comcast Cable just for better speed.
I had ordered it 2 nights ago and picked up the RCA modem yesterday, but couldn't install it (Cable connectivity failed) and wasted a half day. The RCA modem diagnostic does not provide the signal information, and I suspected the modem DOA.
I swapped it with the WebStar modem today, and wasted another half day. Sigh~
I noticed that all my signal levels are in the right range, but there are a lot of 'No RANGING Response time-out' error messages in the log.

After reading all your responses, I'm pretty confident that it is a problem between my wall and the ISP. I have an appointment with the technician on Saturday, and I will ask them to send someone who is good at the line troubleshooting.
Also, I will try to connect the cable modem directly to the connector outside of my house, bypassing all the internal wiring.

Btw, I don't want to spend $3.00/month for the modem lease, so I have ordered the Motorola SB5101 Cable Modem, without thorough investigation. Is it good enough (better than RCA or WebStar)?


+++++++++++++
I have the same problem with Comcast in Auburn GA, I had no issue with my Internet for 3 years and one day out of the blue mayor issue. see below!!

2009-09-13 23:41:20 3-Critical R002.0 No Ranging Response received - T3 time-out (US 1)
2009-09-13 23:41:15 6-Notice M572.0 Max T3 No Rng Rsp Timeouts - Reinitialize MAC...
2009-09-13 23:41:15 3-Critical C206.0 DCC aborted unable to communicate on new upstream channel
2009-09-13 23:41:15 3-Critical R006.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted
2009-09-13 23:41:15 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out

This is a True Comcast network problem you do not have to change any cable modems or routers in your house. The issue is outside of your house. What you see in your cable modem is a soft reboot "Max T3 No Rng Rsp Timeouts - Reinitialize MAC..."

I had Comcast out in our Sub Division for days working a this same issue and they resolved for 5 days but now it is back. I have a new work order open.

Keep the pressure on Comcast to fix the issue.

I feel your pain...

Keep us posted.
September 14, 2009 12:51:44 PM

manicmark said:
Insightbb is my provider in Northern Kentucky. Last night I tried to upload image files to a web host and the host timed out the upload. I can't upload anything larger than an htm file or email. According to insight's own online speed test my download speed in 10.26Mpps and my upload speed is 117.33Kpps...

They say everything is fine... "some packet loss" and are sending a guy out on Monday.

I use a Mac... I don't have any spyware or viruses and I've plugged the RCA DCM425 modem directly into the machine, bypassing the router.

The repair man is going to come out and the only thing he is going to do is replace the modem (that's what I expect will happen).

Sounds like my problem is exactly the same... and it isn't going to be a modem issue...

Any updates on your end? Thanks, Mark


+++++++++++++
I have the same problem with Comcast in Auburn GA, I had no issue with my Internet for 3 years and one day out of the blue mayor issue. see below!!

2009-09-13 23:41:20 3-Critical R002.0 No Ranging Response received - T3 time-out (US 1)
2009-09-13 23:41:15 6-Notice M572.0 Max T3 No Rng Rsp Timeouts - Reinitialize MAC...
2009-09-13 23:41:15 3-Critical C206.0 DCC aborted unable to communicate on new upstream channel
2009-09-13 23:41:15 3-Critical R006.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted
2009-09-13 23:41:15 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out

This is a True Comcast network problem you do not have to change any cable modems or routers in your house. The issue is outside of your house. What you see in your cable modem is a soft reboot "Max T3 No Rng Rsp Timeouts - Reinitialize MAC..."

I had Comcast out in our Sub Division for days working a this same issue and they resolved for 5 days but now it is back. I have a new work order open.

Keep the pressure on Comcast to fix the issue.

I feel your pain...

Keep us posted.
September 14, 2009 1:08:54 PM

educashun_viktum said:
I have cable internet through Insight Communications, and after about eight months of good service my internet just started dropping for no reason that I can see. They've sent a tech out, who's read my receive/send signal strengths and my SNR, all of which are in spec. I've replaced my modem twice, reformatted and reinstalled everything. The only thing I can find is in the event log, I'm getting a lot of ranging, a lot of t3 timeouts, a lot of DHCP failures ... all of which correspond to the times I'm experiencing internet issues. I'll post the events. Is this something that's going on because of an issue on my end, or is it a problem with my ISP. I feel like I'm getting the runaround. I'm being constantly told it's my hardware or software, which seems kind of open-ended and ambiguous. Just something they can tell me to take the blame off themselves because they don't really know what's going on. Thnkas for any help you guys can give me, it's been a frustrating couple of months.

Event log:

Wed Apr 05 02:08:17 2006 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Wed Apr 05 01:52:20 2006 Error (4) Improper Configuration File CVC Format
Wed Apr 05 01:52:20 2006 Notice (6) TLV-11 - unrecognized OID
Wed Apr 05 01:52:18 2006 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Wed Apr 05 01:52:04 2006 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Wed Apr 05 01:51:32 2006 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Wed Apr 05 01:48:24 2006 Error (4) Improper Configuration File CVC Format
Wed Apr 05 01:48:24 2006 Critical (3) REG RSP not received
Wed Apr 05 01:48:18 2006 Notice (6) TLV-11 - unrecognized OID
Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Tue Apr 04 03:00:11 2006 Critical (3) REG RSP not received
Tue Apr 04 03:00:04 2006 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Tue Apr 04 02:59:49 2006 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Tue Apr 04 02:59:16 2006 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) REG RSP not received
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Critical (3) DHCP FAILED - Request sent, No response
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) No Ranging Response received - T3 time-out


+++++++++++++
I have the same problem with Comcast in Auburn GA, I had no issue with my Internet for 3 years and one day out of the blue mayor issue. see below!!

2009-09-13 23:41:20 3-Critical R002.0 No Ranging Response received - T3 time-out (US 1)
2009-09-13 23:41:15 6-Notice M572.0 Max T3 No Rng Rsp Timeouts - Reinitialize MAC...
2009-09-13 23:41:15 3-Critical C206.0 DCC aborted unable to communicate on new upstream channel
2009-09-13 23:41:15 3-Critical R006.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted
2009-09-13 23:41:15 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out

This is a True Comcast network problem you do not have to change any cable modems or routers in your house. The issue is outside of your house. What you see in your cable modem is a soft reboot "Max T3 No Rng Rsp Timeouts - Reinitialize MAC..."

I had Comcast out in our Sub Division for days working a this same issue and they resolved for 5 days but now it is back. I have a new work order open.

Keep the pressure on Comcast to fix the issue.

I feel your pain...

Keep us posted.
September 17, 2009 1:01:23 PM

Ok, I hope to shed some light on everyone's issues and pull the curtain back a little. I WAS a Charter Communications Senior System Tech. I was responsible for maintaining and repairing all mainline issues. The problem that you guys are having is, i repeat, IS a problem with your cable companies hardline distribution plant. In other words, don't waste your time or money replacing modems and or routers. If you are experiencing problems at certain times of the day, it is related to temperature. I know that sounds crazy, but hardline cable is metal. It expands and contracts with hot and cold temperatures just like any other metal substance. When this happens, the metal is either less dense(when hot) or more dense(when cold). Therefore, the signal passes differently depending on the temperature. Causing higher or lower signals when the sun comes up or goes down. Now, to battle this phenomenon, the amplifiers hanging on the lines are designed to automatically adjust the Gain (signal boost) accordingly. Now, these have to be adjusted and set up properly at least a couple times a year. Mainly due to the changing of the seasons. They can only handle so much temperature change before they start to cause serious errors. Thus your problem begins. Now keep in mind, that most newby service techs for most cable companies are clueless about anything to do with mainline issues. They are only trained to diagnose problems inside your house, and depending on their training(which usually isn't much) they probably won't even know any of this. Also, in most areas, the service techs are scared to put in a "Line Problem" because if they have missed any problems inside your house that could be causing the problem, then they are given a hard time by the system techs (who will find it). So, you should definitely insist that a line problem be put in. Also, talk with any of your neighbors and see if they are having the same issues at the same time. This will help you in your request for a line problem.

Hope this helps

Justin
September 27, 2009 5:28:25 PM

2009-09-27 12:12:23 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-27 09:32:22 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-26 21:42:25 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-26 21:28:24 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-26 21:12:33 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-26 21:08:24 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-26 20:34:27 5-Warning B502.6 TEK Invalid - Invalid Key Sequence Number
2009-09-26 20:34:24 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-26 19:05:27 6-Notice M572.0 Max T3 No Rng Rsp Timeouts - Reinitialize MAC...
2009-09-26 19:05:27 3-Critical C206.0 DCC aborted unable to communicate on new upstream channel
2009-09-26 19:05:27 3-Critical R003.0 Init RANGING Critical Ranging Request (17) Retries exhausted
2009-09-26 19:05:27 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
1970-01-01 00:00:13 3-Critical D001.0 DHCP FAILED - Discover sent, no offer received
2009-09-26 18:16:24 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-26 16:52:24 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
1970-01-01 00:00:13 3-Critical D001.0 DHCP FAILED - Discover sent, no offer received
1970-01-01 00:00:03 6-Notice M571.1 Ethernet link up - ready to pass packets
2009-09-26 15:56:11 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-26 15:21:15 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
2009-09-26 14:48:10 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-26 13:56:12 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-26 13:46:11 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-26 13:30:12 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-26 13:20:11 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-26 13:10:13 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-26 12:52:32 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-26 10:48:13 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-26 10:24:20 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-26 01:18:46 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
2009-09-26 00:58:15 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-25 22:04:03 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
2009-09-25 16:14:17 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-25 15:46:17 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-25 06:58:20 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-25 06:20:19 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-24 21:30:19 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-24 20:42:27 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
2009-09-24 15:54:21 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-24 15:52:21 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-24 15:24:21 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-24 10:42:28 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-24 10:26:22 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-24 07:28:23 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-24 07:02:23 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-24 06:53:06 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
2009-09-23 19:16:35 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-23 19:04:25 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-23 18:46:30 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-23 18:28:27 5-Warning B502.6 TEK Invalid - Invalid Key Sequence Number
2009-09-23 18:28:24 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-23 17:04:25 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-23 16:54:25 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
1970-01-01 00:00:11 3-Critical D001.0 DHCP FAILED - Discover sent, no offer received
1970-01-01 00:00:02 6-Notice M571.1 Ethernet link up - ready to pass packets
2009-09-23 14:10:25 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-23 10:42:57 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
1970-01-01 00:00:17 3-Critical D001.0 DHCP FAILED - Discover sent, no offer received
1970-01-01 00:00:02 6-Notice M571.1 Ethernet link up - ready to pass packets
2009-09-22 17:14:34 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-22 14:43:10 6-Notice M572.0 Max T3 No Rng Rsp Timeouts - Reinitialize MAC...
2009-09-22 14:43:10 3-Critical C206.0 DCC aborted unable to communicate on new upstream channel
2009-09-22 14:43:10 3-Critical R003.0 Init RANGING Critical Ranging Request (17) Retries exhausted
2009-09-22 14:43:10 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-22 14:07:07 6-Notice M572.0 Max T3 No Rng Rsp Timeouts - Reinitialize MAC...
2009-09-22 14:07:07 3-Critical C206.0 DCC aborted unable to communicate on new upstream channel
2009-09-22 14:07:07 3-Critical R003.0 Init RANGING Critical Ranging Request (17) Retries exhausted
2009-09-22 14:07:07 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-22 13:58:16 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-21 16:38:19 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-21 15:20:40 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
2009-09-21 14:46:21 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-20 17:10:23 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-20 16:48:23 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-20 11:24:26 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-20 10:52:25 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-19 23:42:26 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-19 23:06:27 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-19 22:32:26 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-19 22:14:27 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-19 21:52:26 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-19 21:50:27 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-19 20:04:31 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
1970-01-01 00:00:14 3-Critical D001.0 DHCP FAILED - Discover sent, no offer received
1970-01-01 00:00:02 6-Notice M571.1 Ethernet link up - ready to pass packets
2009-09-19 17:06:25 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-18 21:58:27 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-18 21:06:27 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-18 18:18:28 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-18 18:10:28 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-18 16:20:20 6-Notice M572.0 Max T3 No Rng Rsp Timeouts - Reinitialize MAC...
2009-09-18 16:20:20 3-Critical C206.0 DCC aborted unable to communicate on new upstream channel
2009-09-18 16:20:20 3-Critical R003.0 Init RANGING Critical Ranging Request (17) Retries exhausted
2009-09-18 16:20:20 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-18 16:14:23 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-17 21:48:23 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-17 21:44:23 3-Critical R002.0 No Ranging Response received - T3 time-out (US 2)
2009-09-17 17:33:38 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
2009-09-16 20:46:26 3-Critical R002.0 No Ranging Response received - T3 time-out (US 8)
2009-09-16 20:27:05 6-Notice M572.0 Max T3 No Rng Rsp Timeouts - Reinitialize MAC...
2009-09-16 20:27:05 3-Critical C206.0 DCC aborted unable to communicate on new upstream channel


This is just a little more than a week of my connections. I have had a tech come out and litterally replace everything includeing routers splitters cables reset up everything i own bypassed the router and it all worked fine for about 6months now i am having all these drops and i dont know what to do? They just tell me everything is fine from their end.

Frequency 549000000 Hz
Signal To Noise Ratio 35.8 dB
Power Level 4.4 dBmV
Upstream Value
Channel ID 8
Frequency 31600000 Hz
Power 45.7 dBmV
This is a SB5101 modem.
February 2, 2010 1:01:51 AM

Well where to start... have been a cox customer for several years now and haven't really had much issues until about 4 months ago other than the occasional service outage during a storm. Then a little over 4 months ago I started experiancing intermittent loss of connectity in which at the same time the device would reboot. The first few times this happend I assumed this was loss of signal or a renewal of my IP address from Cox.

After several occurences I decided to call tech support and start troubleshooting. Everytime the linksys would self-restart everything was fine, so it was difficult to explain as each time I called Cox would test and see no problems. So they sugguested the device may be losing power. I switched outlets and replaced the surge protector with a new one but the problem kept occuring.

Next Cox explains that this is related to bad coax cable in my house, so they send out a tech which cost a few hundred to check the cabling inside and outside my house, but the problem kept occuring.

Further troubleshooting led to being told that the hardware was bad, so I bought another WCG200 unit and guess what same issues with the new one. Luckily I was able to return the open unit but had to pay a 15% restocking fee to the retailer.

Further troubleshooting with Cox sent me over to Linksys whom explained that this was a known issue and they informed Cox that they needed to update my firmware as it appeared to be quite outdated. So Cox pushed out a new version of the firmware which didn't work and another call to Linksys had me default my device and reconfigure the device. Then it started working and I thought for sure the issue was fixed.

Same problem came back later that night but now is more frequent like every 4 hours the device has to be restarted as the previous issue with the self-restart doesn't occur. Atleast before the firmware upgrade the unit worked but would restart it'self and was more of an annoyance then anything.

Another call back to Cox and I am told that even though it is a compatible device and supported per their website that I would need to purchase another brand of modem and a seperate wireless router combination to restore my stable internet connection out of pocket. I was then transferred over to sales support who explained they wouldn't send out a device to test with that I need to buy this and that "technology changes" so I needed to buy another unit, even though their website still says this is a compatible unit?

Every time I call Cox tech support it is like I have a mystery device as each call takes anywhere from 1 to 2 hours just to get to the point of Teir1 to lead to Teir2 support or eventually to linksys. I have probably spent atleast 36hours on the phone with their support and each time getting another story or hypothetical diagnosis which is costing me (customer) to troubleshoot to no avail. The signals have been checked every call, the modem has been re-provisioned numerous times...

After the most recent firmware upgrade by Cox I got the modem log feature so I plugged a few of the log errors into a search engine and low and behold this problem appears to be very wide spread amongst this device and various ISP's and definetly related to firmware. It appears that each ISP works with Linksys to get firmware releases and the last few have caused quite a bit of issues. It does appear as Comcast has made the most progress in this department and has recently released a new updated version of the firmware that fixes these issues, but from what I can tell they have many more customers on this model than my ISP.

Anyways, I notice there were a few Cox TOC members that browse these sections to help from time to time and I am hoping someone can shed some light on this. It is my understanding that this is the only group within Cox tech support that has any understanding in this process.

here is my information:

Model: WCG200 (version 1)
Firmware Version: 2.0.3.9.31-0418

Standard Specification Compliant DOCSIS 1.0/1.1/2.0
Hardware Version 1.2b
Software Version 2.0.3.9.31-0418
CM Certificate Installed

Status:

System Up Time 0 days 00h:09m:12s
Network Access Allowed
WAN DHCP IP Address Lease D: 01 H: 00 M: 00 S: 00

Connection:

Acquire Downstream Channel 843000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+

Downstream Channel

Lock Status Locked
Modulation 256QAM
Channel ID 207
Provisioned Rate 11500 kbps
Symbol Rate 5360.537 Ksym/sec
Downstream Power 4.6 dBmV
SNR 37.4 dB

Upstream Channel

Lock Status Locked
Modulation 16QAM
Channel ID 1
Provisioned Rate 2300 kbps
Symbol Rate 2560 Ksym/sec
Upstream Power 36.0 dBmV

Modem Log Errors;

Time Priority Description
2010-02-01 21:27:59 notice TLV-11 - unrecognized OID
2010-02-01 18:31:03 critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
2010-02-01 18:31:02 critical Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 timeout
2010-02-01 18:31:02 critical SYNC Timing Synchronization failure - Failed to acquire FEC framing
2010-02-01 18:30:34 critical SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period
2010-02-01 11:04:37 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out
2010-01-30 20:50:15 critical No Ranging Response received - T3 time-out
2010-01-28 12:38:09 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out
2010-01-27 23:10:52 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out
2010-01-27 19:49:54 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out
2010-01-27 09:13:34 critical DHCP WARNING - Non-critical field invalid in response.
2010-01-27 09:13:17 critical Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 timeout
2010-01-27 09:12:55 critical SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period
2010-01-27 08:21:20 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out
2010-01-24 14:04:24 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out
1970-01-01 00:03:29 critical Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 timeout
February 13, 2010 4:17:28 AM

After having the same "connection drop" problem with charter communications (in Janesville WI here) - and changing out my modem, checking ever setting known to man with my router, and calling a service tech to check the lines, I've come to realize that its probably easier to find a better alternative ISP than it is to find a tech good enough to resolve the issue.

Finally, as one last attempt tonight, i cleared my modem log and just played a game of Team Fortress 2 until it happened again, then immediately went to my modem, logged in, and copied the log.

Fri Feb 12 23:58:07 2010 Fri Feb 12 23:58:07 2010 Information (7) Map Reject - Downstream Traffic Flow Not Mapped to BPI+ SAID ...
Fri Feb 12 23:58:07 2010 Fri Feb 12 23:58:07 2010 Information (7) SA Map State Machine Started
Fri Feb 12 23:57:47 2010 Fri Feb 12 23:57:47 2010 Information (7) Authorized
Fri Feb 12 23:57:46 2010 Fri Feb 12 23:57:46 2010 Information (7) Registration complete!
Fri Feb 12 23:57:46 2010 Fri Feb 12 23:57:46 2010 Information (7) We registered with a DOCSIS 1.1 config file!
Fri Feb 12 23:57:46 2010 Fri Feb 12 23:57:46 2010 Information (7) Received a REG-RSP message from the CMTS...
Fri Feb 12 23:57:46 2010 Fri Feb 12 23:57:46 2010 Information (7) Sending a REG-REQ to the CMTS...
Fri Feb 12 23:57:46 2010 Fri Feb 12 23:57:46 2010 Information (7) CableModem SNMP configure complete
Fri Feb 12 23:57:41 2010 Fri Feb 12 23:57:41 2010 Information (7) IP init completed ok
Fri Feb 12 23:57:41 2010 Fri Feb 12 23:57:41 2010 Information (7) CableModem TFTP init ok
Time Not Established Time Not Established Error (4) ToD request sent- No Response received
Time Not Established Time Not Established Information (7) CableModem DHCP client init ok
Time Not Established Time Not Established Information (7) MAP w/initial maintenance region received
Time Not Established Time Not Established Information (7) Downstream sync ok
Time Not Established Time Not Established Information (7) MAP w/initial maintenance region received
Time Not Established Time Not Established Information (7) Beginning initial ranging...
Time Not Established Time Not Established Information (7) downstream time sync acquired...
Time Not Established Time Not Established Information (7) Downstream sync ok
Time Not Established Time Not Established Information (7) starting ds time sync acquisition...
Time Not Established Time Not Established Information (7) MAP w/initial maintenance region received
Time Not Established Time Not Established Information (7) Beginning initial ranging...
Time Not Established Time Not Established Information (7) Initial ranging ABORT, re-scanning downstream
Time Not Established Time Not Established Information (7) MAP w/initial maintenance region received
Time Not Established Time Not Established Information (7) Downstream sync ok
Time Not Established Time Not Established Information (7) Beginning initial ranging...
Time Not Established Time Not Established Information (7) downstream time sync acquired...
Time Not Established Time Not Established Information (7) Downstream sync ok
Time Not Established Time Not Established Information (7) starting ds time sync acquisition...
Time Not Established Time Not Established Information (7) Locked on the downstream. Waiting for UCDs...
Time Not Established Time Not Established Information (7) Downstream lock ok
Time Not Established Time Not Established Information (7) Sync Start
Fri Feb 12 23:54:45 2010 Fri Feb 12 23:54:45 2010 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...

Prior to this I was getting several "T3 Time-out" errors in my logs, but I believe those were caused by mac-address cloning (a feature I read would cause those problems from time to time) - those are not the disconnects we are experiencing however, they just make for a messy log. The important part is the "received response to broadcast maintenance request, but no un(..icast Maintenance opportunities received - T4 timeout). So, since it looks like that message is tied to the actual lines, there is no way to fix it if a tech can't 'figure it out'. The hardest part is that so many customers out there are absolute idiots, that it's impossible to get a tech to even give those of us with REAL issues to resolve the problem. I'm fed up with years of bad charter service (and I do mean YEARS, they are a HORRIBLE company and I can't wait to see them fully bankrupt for the huge debt they owe as it is - this is not rage, simply how I've come to feel from about 13 years of 'working the system' to get help from them, but I'm done playing those games with charter).

Whats worse though, is I'm pretty damn good with computers, I feel absolute pity for every person who DOES have legitimate problems like this, but doesn't know enough to get it resolved - they just have to suffer the problems and probably get a constant feeling of "if only I knew computers better, i could resolve this" - I know because several members of my family were like this.

Charter, I'm sorry, but I'm done.
March 3, 2010 10:26:24 PM

All this information is very useful. Weird thing is that I only get timed out on certain websites. i.e. facebook etc. I can log onto yahoo, google, ask, etc all the time without a lick of problems. I too am running linksys router for wireless with Comcast cable internet to the main RCA router. I can log onto these websites through my companys wifi internet with no problems but at home its religous I will get a timed out connection at least 3 times before connecting. I haven't really looked at what the pinging #'s are at different times as I probabley should. I do play a online game that occasionally gets slow and will rarely disconnect me. But I believe that to be a problem with the compacity the server is experiencing at a givin time. (i.e. the problem on ther end not mine) Anyways Thank you guys and anymore insight would and could be useful.

I am running Windows Vista a/b/g with linksys wireless g router. I am only in the next room from wherethe Comcast cable router and linksys router are. I dont believe it to be a signal strength problem.
March 13, 2010 1:49:42 PM

I am also having a problem with dropped connections. It consistently happens at least once a day, sometimes several times a day. Every now and then we can go two or three days at most with no drops. We use Mediacom, our modem is a Mediacom supplied Thomson DCM425, and is connected to a D-Link DIR655 wireless router. We also have several splitters on the line for our cable TV. I did find a temporary fix to get the internet back up and running. It just takes a few of minutes and has worked without fail for the past couple of weeks (minimum of 10x). I have an old motorola modem (we switched modems a while back thinking that might be the issue) that I keep handy. When my connection drops, I unplug the Thomson modem and remove both the cable and the ethernet cable from the back. Then I remove the ethernet cable that connects my computer to the router and plug it into the Motorola modem. I connect the cable line to the Motorola modem, and then plug it in. Within a couple of minutes, I have an internet connection. But I don't use it like this (otherwise no wireless, and no other computers on my network will have internet, not to mention having to register the new MAC address which my cable company charges $1.99 to do!), I unplug everything I just plugged in and hook it back up the way it was before. Without fail, I have my internet connection back up again. Sounds confusing, but basically you are just connecting your computer directly to the alternate modem (not through a router), waiting for the connection to come up, then putting everything back again. Not sure why this works. Seems like there should be an easier way to do this. It's almost like the connection needs to be reset or something. I have tried using the reset button on the back of the modem (many, many times) and it rarely (maybe 1 out of 15 times) brings my connection back up. I have also tried unplugging everything (modem, router, computer) and waiting 5+ minutes, then plugging everything back in. Also rarely works. Although I don't consider this an actual solution, at least it gets my internet connection back up and only takes a few minutes.
April 19, 2010 5:54:03 AM

Not 100% sure if this is the culprit, but I had a charter tech which took 2 hours at my house tracking down the problem once..

He changed the house line, modem , house to pole, then started backtracking to the C/O.

He found a bad line amplifier on a pole about 5 houses down.....

His explanation: Within the line amp, there are circuits which measure the resistance down the line to the next amplifier. The resistance of the line changes 24/7 due to "thermal expansion/contraction (temperature variance)", there are internal compensation amplifiers which will increase or decrease output down the line to attempt to maintain X dbmv output down the line. The circuits can and do wear/ burn out over time. If this is outage occurring consistently in mornings / evenings / both times, the amplifier may have reached the limit of its adjustment. Then the expensive and quantitative option of the cable co. is "the number of subscribers from that point to end of line" worth the cost of running a new line because thermal cycling has prevented the run to stay in specifications for internet / cable.

Simply you become a $ value...
May 30, 2010 4:15:47 PM

"Started Unicast Maintenance Ranging" .... failed.... also coincided with a Zone Alarm message that I got saying about the same thing "tarted Unicast Maintenance Ranging" ...blocked... where my ZA settings blocked an attempt to connect to my computer. I then logged into the router and traced the attempted connection back to my sons laptop, which was trying to set up a network with others on the LAN using the wireless connection through the router.
Anonymous
June 20, 2010 11:47:54 PM

I also had this same problem in Turlock ,Ca
A simple 79$ fix (about a years modem rental) I bought a Motorola Surfboard modem.
problem fixed.
No more dropping to desktop or connection lost messages.
Online all the time
June 21, 2010 4:04:02 PM

This may be the reason you keep timing out.

Turn off the ip6 settings on your lan/network adapter under the Control Panel, System, Device Manager. Also, change your internet options to limit data speed to 10mb/s (instead of 100mb/s). Many cable modems cannot communicate with ip6 and timeout. I have one mobo that has no issue with ip6 and another must be turned down to ip4. Try this before you invest tons of money.
June 22, 2010 2:45:14 PM

I'm sorry it is not ip6, rather, it is called IvP6. Sorry about the mistake.
Anonymous
August 22, 2010 1:36:44 PM

I too am having a problem with my laptop /wireless connection dropping- I constantly am "repairing" the connection on the systray which I guess is renewing the ip address every time. Occasionally I can reload, and I can get it to work that way. But usually a repair is required- At first it was less frequent ; now it is every few minutes. I get "problem loading server check network connections " or something to that effect, or an email error depending on which application i'm using. Our pc /desktop doesn't have this issue ( but my eee pc does-- the only laptop constantly connected- my husband can use his dell w/ no problem but rarely connects here, so I don't know). The laptop runs windows xp, and the desktop runs vista if that matters. and I've also tried calling Belkin ( the router) and our cable company , Brighthouse networks/ road runner-- They say there is no problem in the line, and the Belkin tech had me change the channel on the router to 11 . That did not solve the problem. I am going to see if my husband's palm hot spot w/ verizon does the same thing , if i connect my laptop that way-- If it does, I guess i will know it has something to do w/ the isp-- At first I thought it was my email or something, because the connection never used to do this ever. In fact Brighthouse/road runner has been a great provider aside from this issue which may or may not be attributed to them. I Just want to fix it, because it is very annoying to constantly repair the connection :( -- Any help is appreciated--
Anonymous
August 22, 2010 2:10:56 PM

UPDATE to mine-- i actually found a solution after months 'i think' - thank someone named Brian for this who posted this on another forum, if it works for you too!
The following very simple solution worked for me. This will not solve your problem if both your pc and laptop are dropping the connection- but if it is just your laptop having an issue, give it a go.
I turned the network adapter power save mode to off and the problem stopped, here are the steps:
- click "Start"
- click "Control Panel"
- click "Classic View"
- doubleclick "System"
- select "Hardware" tab
- click "Device Manager" button
- click "+" to left of "network adapters"
- doubleclick "Atheros AR5007EG ...."
- click "Advanced" tab
- select "Power Save Mode"
- select "off"
- select "OK"
November 5, 2010 7:11:07 PM

hey all,
i am a computer consultant, systems engineer/administrator, i however do not work for a cable company and have limited knowledge about specifics for cable fiber technology. however i have a firm grasp on networking.

i have had perfect service from RR(oceanic-timewarner) in hawaii until i moved to a new residence.
the house had never had cable service, so when i got it installed it was fresh from the pole to the house to the cable modem. instantly i had issue with modem rebooting etc. i also have the digital phone service.
checking the scientific-atlantic modem reveals t3 time outs and some OID errors there are a few sync ones etc that seem to coincide with the dropped packets(ie connection dropping)

the reason i am posting is that even being able to understand the problem i have had considerable trouble MAKING them fix it. so long story short: i was able to PROVE my problem over and over so that they cannot deny it.(make them responsible to pay my bill and fix the problem)
after swapping out modems, cables, routers, computers, fresh installs, network cards etc... which was all just for the sake of saying it had been done, since the digital phone was also cutting out. also just to note i dont have cable tv so no splitters amps etc. just pole -> house -> cable modem all lines run by the cable company...
so the first tech gave me an older model modem that was "less sensitive" so that instead of rebooting and all the lights resetting every time there was an issue(sometimes every 2-3 min othertimes not for a day or two) it would just drop the connection then pick it back up a few heartbeats later.

so the biggest symptom is playing a game, everything freezes and either a disconnection or then everything goes fast to catch up... like it froze 3 sec then all comes up to speed. very annoying especially when it should be working great(like i said i had no problems at the other house, which i will note was in another district on the island)

ok so heres the meat:
---------------------------
start menu > run(or on windows 7 hold the windows key between alt/ctrl and tap R)
type in CMD and hit OK
type: ping -t google.com
hit enter
this will start an endless loop of packets going to google.com; you should notice that when the internet is idling there should be a consistent stream of packets flowing in at a similar millisecond(ms) value... ie mines 55ms-66ms with an idle connection.(note: im in hawaii yours should be lower)
so now, i goto the speedtest page for oceanic time warner(speedtest.oceanic.com) your ISP might have something similar, its good to use your own ISP's so that you can truly flood the internet connection to its max vs maybe being bottle necked on some internet router outside of your ISP which might not prove the problem...
ok so anyways i run 2 tests at the same time... one to speedtest.oceanic.com and the other to speedtest.net
now i watch my ping test and see the milliseconds start to go all over the place, then eventually packets are lost indicated by the "request timed out" message
also i can note that there is a pause in the speedtest indicator.
so i had a t2 tech support guy on the phone watching my modem while i was doing this and he was able to see that the signal to noise ratio was going out of spec.
---------------------
i got the modem last december 2009. its now november 2010 and i still have the problem. i felt bad for the techs for awhile because it was hard to replicate the problem, but i still knew there was a problem, can hear static/cutouts on the digital phone, game lags, dropped packets etc... but they where still trying to dodge the bullet... i gave them the benefit of the doubt; told the tech i hoped they'd find the problem in their system since they said it wasnt at my house and stopped calling to complain.
time goes by, same problem, getting pissed off trying to use the internet service i pay for and its constantly a hassle. I charge my clients 65$/hr to troubleshoot problems for them, considering how much ive spent on my own personal problem its troubling for me to recommend their service to anyone else even though ive had it for the last 8 years at other homes with no problems.....
so the only thing they havent done on my house is replace the faceplate on the telephone pole, re-run the line to the house and re-run the line to the cable modem. otherwise they have some fked up setting in their system that needs to be addressed. i feel bad for the people without the techincal experience to pin it to these corporate hogs so here you go; hope it helps!
btw, they have told me that i can get a refund from the first time i called to complain, ie january of this year since they refunded december right off the bat because the service was blatantly broken($600 to stand up for what is right. but i still have to fight them for it)
good luck
-themeONE

ps just some basic info:
most cable modems can be accessed at http://192.168.100.1 and there is a log file that can be helpful, especially to show that its not YOUR equipment with a problem. also it should have the signal specs.
i had lots of techs come up but they never saw the specs fluctuate on the modem, mostly because it was idle while i was on the phone complaining.
from what ive read on the net your cable modem should be within these specs:
--------------------------
downstream power: -15dbmV to +15dbmV
upstream power: 30dbmV to 53 dbmV
signal to noise ratio(SNR): 33db or more
--------------------------
November 7, 2010 6:16:54 AM

This topic has been closed by Mousemonkey
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