Comcast / Motorola sb5100 cable modem dropping connection...
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Posted by on May 10, 2006, 8:37 am
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I have broadband cable internet service from Comcast and I've been very happy with it until this past week. I've been having intermitant service to the net and it's really bugging me! It will work fine and the online light will be on the external modem and then it will just be off and no internet for my family (and biz). Then, it will just come back on again after a few minutes, maybe stay on for hours then off again for awhile. I've talked to Comcast and we did a powerdown reset on the computer and modem and he could tell on his end what my modem was trying to do (but not succeeding in doing = to get online) and he said that the signal was good to the house and that many people on my street were on at that very moment w/o any complaints. He had me test the cable channels and they were all fine as well. A new (mega thick) line was run to our house just a few months back (worked fine after the cable was installed). So he said it must be the modem. We own our modem so they offered to have us signup for their rental service ($3?/mo) but he wasn't sure if there would be a service /installation fee to deliver and set it up. I told him I'd just buy another one myself. Am I smart in doing this or should I just pay their fee and have them do it so the servicing is all on them? I worry (and have heard about) about them using some cheap modems that actually don't work as reliably or as fast as the Moto Surfboard SB5100 that I now have. Yes, the irony of that last staement about my modem being reliable has hit me! I have some info (an error log and some specific numbers but I'm not sure which ones are relevent here) from a Motorola diagnostics site if that could help anybody help me. Before I fork over my money on a new modem could it be anything else? Thanks so much for the help!!!! | |||||||||||||
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Posted by Agent_C on May 10, 2006, 11:21 am
Please log in for more thread options On 10 May 2006 05:37:36 -0700, b4serenity@gmail.com wrote:  speaking to has no idea what other people are complaining about. Ask your neighbors if they're having the same problem. A_C | |||||||||||||
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Posted by Dave on May 10, 2006, 2:23 pm
Please log in for more thread options Can you access the modem to see the levels yourself? | |||||||||||||
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Posted by on May 10, 2006, 3:16 pm
Please log in for more thread options Does any of this help any? ///////////////////////////// Downstream Value Frequency 687000000 Hz Locked Signal to Noise Ratio 36 dB Power Level -10 dBmV The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading Upstream Value Channel ID 3 Frequency 31000000 Hz Ranged Power Level 52 dBmV //////////////////////////////////// ERROR LOG Time Priority Code Message 2006-05-10 13:34:47 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out 2006-05-10 12:24:22 3-Critical R002.0 No Ranging Response received - T3 time-out 2006-05-10 12:23:57 3-Critical T001.0 SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing 2006-05-10 12:23:43 3-Critical D005.0 TFTP failed - request sent - No Response 2006-05-10 12:22:33 3-Critical R007.0 Unicast Ranging Received Abort Response - Re- initializing MAC 2006-05-10 12:21:54 3-Critical R002.0 No Ranging Response received - T3 time-out | |||||||||||||
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Posted by Bit Twister on May 10, 2006, 3:32 pm
Please log in for more thread options On 10 May 2006 12:16:22 -0700, b4serenity@gmail.com wrote: at a glance you seem to be riding on the end of the power level specs. Here are suggested working ranges for solid operation. Values are from mine: Motorola Surboard SB5120 QAM 256 (Working range) Down Power -4 dBmV (-10 and +10 dBmV) SNR 37 dB (higher than 33dB) Up Power 48 dBmV (30 and 55dBmV) Anytime you lose the connection, get the values. | |||||||||||||
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>very moment w/o any complaints.