Forrest,
Cambium has admitted there is a problem with GPS sync over power dropping
for no reason on the ePMP APs with some software versions, and it is a
cross-platform problem. It doesn’t seem to be any worse on our PacketFlux gear
than it is on the LMG CTM-2M – and we only see this on ePMP, never with PMP
100, 320, 430, or 450. Luckily, we did deploy the puck antennas on all of those
AP’s, and they seem to work just fine with the built-in sync. Cambium is
expecting to fix it in a future software release.
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Forrest Christian (List
Account)
Sent: Friday, May 08, 2015 4:49 PM
To: af
Subject: Re: [AFMUG] Cambium 450 and ePMP with Packet Flux Gear
I'll let others speak to the stability (as a couple already have).
A few months ago there was an issue with a mutual customer of mine and
cambium's which was having sync problems with an epmp radio. To date, I don't
know if the problem was with the epmp, or with the injector, or with a gps
lock, or whatever. I can't say that sync is a perfect thing - from time
to time, gps modules act weird, injectors don't inject, and AP's don't work
right - no matter which product you have. When sync does bad things, it
behaves badly. For all I know, in this case my product *might* have been at
fault. Or not. It's not important for the rest of the story....
In any case, somehow this problem morphed into a statement that somehow the
SyncInjectors had some sort of systemic issue which lots of wisps were
experiencing. I was not particularly amused by this, particularly since I had
no communication from cambium at all in relation to this.... After some back
and forth with my internal contact at cambium I was informed that a) that they
were tracking some *potential* issue with external sync (usually with a
syncinjector) on the ePMP and b) that they hadn't had the time to figure out if
it was packetflux-specific or a general issue yet, and that if they determined
it was related to my product they'd contact me back. So far, no call back, and
I haven't heard any more similar complaints - and I've had interactions with a
lot of people who use this regularly with ePMP with no known issues. I also
haven't seen anything sync-related in the release notes since that time.
-forrest
On Fri, May 8, 2015 at 6:45 AM, Tyson Burris @ Internet Communications Inc
<t...@franklinisp.net> wrote:
General question here. I saw something in the Cambium forum questioning the
reliability of Packet flux Sync Injectors.
If you use them, are your GPS syncs stable and is power output reliable on the
450 and ePMP gear?
