Originally Posted by undecided
I frequent dslreports and don't see the same.
I am a happy user of a SB6121 (Motorola D3 modem) - it has never locked or need to be rebooted.
I'm just a casual reader of DSL reports. Maybe you're more in tune with what comments are reliable, etc. But I just did a quick search on your specific modem and found lots of complaints. I have bolded
some of the highlights. I'm sure it varies a lot by ISP. As I said before, YMMV.
The first is from an older thread
That thread shows up high "sorted by relevance"
. Some choice snippets from the thread:
For the last 8 years or so I was using a SB5120. Had no issues whats so ever. Just over a week ago I picked up a SB6121 because I wanted D3 compatible modem. (My area is D3 compliant).
WHat I have noticed now is that the modem is rebooting randomly and causing my VOIP conversations to fail. It seems to reboot when I am on a call. It has happened 3 times during a call. (Never with my old modem).
There have been issues lately with the 612x series and T4 timeouts.
I also found quite a few recent remarks about the topic, just to see if things are better. Here are some recent threads "sorted by date"
Also, is there a way i can update the firmware on the SB6121 (not the SB6141) to the latest one? (the SB6141 is uptodate with the SB_KOMODO-18.104.22.168-SCM01-NOSH firmware).
RCN won't push a firmware update on this modem for their life. Its outdated and I'm thinking the reason why it takes forever to hold on to the cable signal is because of the outdated firmware it runs.
It has been my experience with Motorola cable modems that you do need to push the Restart button (or power cycle the modem) after doing the "Reset All Defaults" in order for the reset to actually take effect.
As for updating the firmware, unfortunately many ISPs seem to not want to update firmware in customer owned modems (and the ISP is the only official way to get it done).
Another recent thread:
Rogers took it on themselves to upgrade the SB6120 to a bad firmware, I think 22.214.171.124. They pushed this firmware to all SB6120s in service, and it caused enormous headaches. They then pushed 126.96.36.199 to all SB6120s in service, and continued to do this for a long time. I can't recall exactly when they actually stopped (sometime mid 2012), but upgrades were still happening months after Rogers said they would never upgrade firmware again.
Yet another recent thread:
A few months ago, I got new SB6121 cable modem to replace my old cable modem was maxed out due to hardware limitation. However, I am getting frequent connection loss during peak times like some evenings or some weekends each few minutes. Here are two signals from different time (see below). Does anyone have any solution with SB6121? Is that defective? I had old cable modem and it worked great.