I own our Zoom 5341J. It's running TWC approved firmware# 5.5.4.9J. We've had TWC basic internet since about Dec 2012. Until a few weeks ago, all was well. For the past 3 weeks, our connection drops maybe 4-5 days per week. Power cycling the modem fixes the problem.
Modem -> Netgear WNDR3700 -> LAN / WAN
TWC dispatched a tech on Monday June 2. He installed an inline attenuator to tame a high powered channel. My power levels look this this right now:
Downstream Bonded Channels
Ch Lock Status Modulation Ch ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 5 711000000 Hz -0.7 dBmV 38.2 dBmV 0 0
2 Locked QAM256 1 687000000 Hz -0.9 dBmV 38.5 dBmV 0 0
3 Locked QAM256 2 693000000 Hz -0.4 dBmV 38.6 dBmV 0 0
4 Locked QAM256 3 699000000 Hz -0.5 dBmV 38.6 dBmV 0 0
5 Locked QAM256 4 705000000 Hz -0.7 dBmV 38.9 dBmV 0 0
6 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dBmV 0 0
7 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dBmV 0 0
8 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dBmV 0 0
Upstream Bonded Channels
Ch Lock Status US Ch Type Ch ID Symbol Rate Frequency Power
1 Locked ATDMA 51 5120 Ksym/sec 30600000 Hz 42.8 dBmV
2 Locked TDMA 49 2560 Ksym/sec 19400000 Hz 41.8 dBmV
3 Locked ATDMA 50 5120 Ksym/sec 24200000 Hz 42.0 dBmV
4 Locked TDMA 52 2560 Ksym/sec 37000000 Hz 44.3 dBmV
We never lost connectivity while the tech was here. But we have again lost it thrice since Monday. It happens either during the middle of the night, or while we're at work - we wake up to a dead connection.
I chatted and called TWC tech support today. Pings and tracerouts, power levels, etc. All test & look fine. Everything works great - until it doesn't.
The last TWC tech I spoke with suggested that it may be a hardware problem with my modem. And that I should contact Zoom because TWC is not qualified to manage customer-owned modem. I do not know how to test the modem's hardware. I registered my modem on Zoom's site and opened a trouble ticket. I'm within the 2-year warranty, but if I have to ship them my modem for evaluation, I'll need a loaner. So I am thinking of buying a different modem anyway.
Does it sound like a hardware issue?
I'm open to all suggestions.