Comcast Cable modem repeatedly rebooting

I'm having this problem also and it's not a business connection. It is a residential connection.

I just started having this problem for the last 2 weeks also and it's not a business connection. It is a residential connection. just spontaneously reboots every few minutes. waited on hold for comcast last night for 30 min before i hung up frustrated.

Last December I started having the same kind of problem after a very long time (months, if not more than a year) of flawless high speed service. Our setup is residential, not business.

After calling Comcast and describing the problems, they thought that the modem was going bad. I replaced the modem, but the problem continued.

After much research on my part, I found the IP address of my modem so that I could see the status logs. I have a Motorola SB5101 (the new modem). The IP address is http://192.168.100.1/ You can Google for the IP address information of your modem. I became very familiar with the statistics I was seeing.

After about two or three attempts on the part of Comcast to fix our problem remotely (they would actually look at the statistics and reboot the modem from their end), we scheduled technicians to our site.

The technicians were very helpful and knowledgeable. I had saved off some of the logs from the modem; it was very helpful to them that I knew the various numbers.

They tested the line, both at the "street" (we are on a gravel road in rural New Mexico), and at the computer. They ended up putting a 6 db attenuator on the input cable of the modem.

Problem solved, ever since. They said if the problem shows up again, to give them a call. They did not charge for the service call since it was their lines that were causing the problem.

I hope this might help. It took weeks of frustration to narrow down the problem and solution.

Santa Fe Painter, thanks for the response.. i just finally got a hold of comcast and they are sending a tech but also stated that since i have an old modem (SB4200) that is may be that. uggg they are always trying to blame the equipment.

Take heart. I decided to keep the new modem even after we were up and running with the adjustment to our line from the Comcast techs. The new modem seemed faster and more consistent. I think that they were correct that it was showing signs of "dying." The modest price was well worth the improved performance.

well cable techs came out and said lines are fine and levels are good... sooo i broke down and bought a new modem figuring if it was the same issue I would just take it back.. Lo and behold.. the new modem is working without a hitch.. go figure!

I started having similar issue since Yesterday morning, Modem is repeatedly rebooting it self. Called comcast and they said they will send technician. Lets see what happens, can any one help, any thing we can do to solve it,

if you lease the modem have them replace it.

The same thing has been going on with me for a month. So far everyone I've talked to has no solution and tell me all their tests show my connection is fine. I wouldn't waste my time and complain if this was the case. They just take me through the same steps over and over again. I also don't like the idea of taking a chance on whether or not the service call will be charged to you. For the amount of money, it shouldn't cost anything!

**What a coincdence, as soon as I posted this, my internet when out and the modem rebooted... when will it end?!

I am having this problem as well. I use video conferencing from home and it has been working fine for a year. Within the last two weeks, the modem now reboots itself everytime I get on a video call (data rate 384 kbps). It sometimes takes a few minutes, but it always reboots and drops the call. Since I also have Comcast for VoIP, I can't use the phone either. I am thinking that is not such a good decision to tie my phone in with the Comcast internet service. I have an Arris TM402P modem. Their solution was to unplug the router and go directly to the modem. That didn't help. The router is working fine.

again, if you lease the modem have them replace it.

I have this problem on a residential line with one of the older RCA modems.

New comcast customer and 5 days after getting my service I am having the same problems. I checked all the cables, moved to a ups outlet and still the modem reboots every 5 to 10 min.

Called comcast (from my cell because I loose phone too now - Grrr) and gave to wait 5 days for a tech. And take more time off from work - took them 2 tries on different days to get me hooked up.

If verizon offered FIOS in Boston I'd be on it in a heart beat - while my DSL may have been slow, at least it stayed up.

C

After three tech visits which included testing the lines, boosting signals, etc., I insisted that they replace the modem. They did and now it seems to be working.