The 5GHz SM I had took a day or two. The 3GHz SM failed in 6-8 hours.
Installed at 2pm and then died somewhere between 8-10pm, of course when
the customer was trying to watch Netflix so they thought we were
blocking it. Really?
Yeah, I don't know if it needs to be registered (i.e. transmitting) for
the failure to occur, so just powering them up and letting them scan on
the bench over night may or may not produce the failure.
On 8/18/2015 9:27 AM, Mark Radabaugh wrote:
It would help a lot if Cambium was actually talking. Or maybe I have to hunt
it down in their forum.
I have not seen a lot of OOB failures. They seem to last about 24 to 96 hours
before falling over dead. We are seeing a mix of ADI Communication errors
where they basically go deaf, and ones that watchdog reboot constantly. I
don’t know if it matters if they are associated with a AP or not, but I don’t
really have room or facilities to do burn-in testing.
Mark
On Aug 18, 2015, at 10:19 AM, Ken Hohhof <[email protected]> wrote:
Are most of these failing out of box, or after days or weeks in service? I
suspect the failure must be at least somewhat intermittent, or we would never
get past initial configuration.
Is it possible to pre-screen for this before sending SMs out with installers?
Is it necessary for the SM to actually be registered to an AP for the failure
to occur?
-----Original Message----- From: George Skorup
Sent: Monday, August 17, 2015 8:21 PM
To: [email protected]
Subject: Re: [AFMUG] New Cambium 450 SM's dying after a couple of days with"ADI
communication error"
I had a 5GHz SM showing ADI communication failure in red. I sent a
screenshot. The other was a 3.6GHz SM and showed only RF calibration
failure. They wanted to have Tier 3 support get access to it to
recalibrate. I explained that the event log was showing ADI forced reset
invoked, and it watchdog reset about every minute or two, just like the
5GHz radio. After that, they accepted it for RMA, without the
recalibration. Those definitely showed issues on the bench immediately
at boot. I have about 30 more SMs in stock ready to be deployed and I
hope there are no more of these.
On 8/17/2015 8:03 PM, Ken Hohhof wrote:
I've had one so far, it ran for awhile at a customer then started rebooting for
a few hours, run for a few hours, reboot for a few more hours. Cambium wanted
a screenshot, evidently the event log wasn't good enough. I ran the bad one at
the office for a few hours and it didn't screw up.
They had me send it to the repair place in Elgin. What do you want to bet they
will say no trouble found and send it back?
-----Original Message----- From: Mark Radabaugh
Sent: Monday, August 17, 2015 7:25 PM
To: [email protected]
Subject: Re: [AFMUG] New Cambium 450 SM's dying after a couple of days with"ADI
communication error"
3 more this weekend.
One lucky customer is on the 4th radio. We found her a 6 month old radio for
the next attempt at repairing it.
Mark
On Aug 17, 2015, at 7:53 PM, George Skorup <[email protected]> wrote:
Knock on wood.. we've had two confirmed (already RMA'd) and maybe a 3rd out of
60-70 so far. It sucks, but shit happens.
On 8/17/2015 6:31 PM, Jeff Hardy wrote:
I'm halfway through a box of 25 with 4 failures so far, all requiring truck
rolls and embarrassment. I'm going to hold off on sending in the box of dead
radios as we will probably have another one tomorrow. Nice to know they are
working on it....
Jeff
On 08/12/2015 09:43 AM, Mark Radabaugh wrote:
Oh, how the mighty have fallen. People used to write articles about Motorola
quality:
http://www.qualitymag.com/articles/84187-motorola-a-tradition-of-quality
3 failed so far out of a 25 pack - no six Sigma here.
Dear Cambium - what’s going on, and how many more of these can we expect to
fall over dead?
Not cool when it happens to the same new customer twice in 10 days. Makes us
look like idiots.
Mark
