[App_rpt-users] toggling power on USB buss

[Doug Bade]

I am not disputing the observations but wanted to pass along my
experience... as it seems contrary to some others experiences. My controller
PC is 1u Supermicro Atom cpu class board. 

This is very interesting.... 

	I have never had a USB URI dropped from our repeater in 4+ years or
so I have been running them. 4 repeaters connected to one rack mount PC.. I
am wondering what the manifestation is that causes this as the only drops I
ever saw were when I tried to use a 33 foot usb cable ( I had to look very
hard to get one that long that was well shielded ) and it really did not
like it. I use 12  foot usb cable versions or so and never since had a drop.
Granted, our repeaters have very light traffic today compared to years
ago... but it would seem that maybe there is something else causing this as
it *CAN* work for long periods without fail... 

I do have the Controller Allstar PC on a UPS so it never loses power ( site
has backup generator behind that ) and it is almost never linked to anyone
else outside the site, just the local stations to each other ...

Maybe some form of interference or RFI ??? My site is a heavy uhf and 800
site but everything in the shelter is in Superflex and combiners. The
antennas are 500+ feet above the ground.. no RFI of significance in the
shelter, with 30 or so transmitters, 2 of them Broadcast FM and next door is
an HD UHF TV... on same tower..

Doug
KD8B

-----Original Message-----
From: app_rpt-users-bounces at ohnosec.org
[mailto:app_rpt-users-bounces at ohnosec.org] On Behalf Of Keith Goobie
Sent: Wednesday, March 26, 2014 7:59 AM
To: kk6ecm; Geoff
Cc: app_rpt-users at ohnosec.org
Subject: Re: [App_rpt-users] toggling power on USB buss

It is for this and other reasons, that we have installed an AC Power
Controller at our site - it is from Digital Loggers and it is found at
http://www.digital-loggers.com/epcr2.html

Keith


On 3/26/14 7:45 AM, "kk6ecm" <kk6ecm at gmail.com> wrote:

> Similar experience here... It seems Asterisk stops talking to the
device...
> could be the operating system. sometimes entering "service asterisk
restart"
> from the command line works, if not "reboot" from the command line. If 
> all else fails, then a hard reboot.
> 
> Hoping to hear from others on this.
> 
> Bob
> kk6ecm
> 
> 
> Sent from iPad
> 
> 
> On Mar 26, 2014, at 7:34 AM, Geoff <ars.w5omr at gmail.com> wrote:
> 
>> I'm seeing info here and there on whether power cycling a USB device 
>> (without shutting down the whole system) is possible or not.
>> 
>> On occasion, I have the need to physically walk into the repeater 
>> room and check to see if the lights are blinking on the URIx's, 
>> because sometimes they -stop-.  (Damnit, Jim - I a radio operator, 
>> not a URIx heartbeat cardiologist ;->).
>> 
>> My quick and dirty thought would be to find a way to discover, via 
>> software, whether or not a specific URIx had a green-blinking light 
>> and if not, power-cycle that usb device.
>> 
>> Anyone have an idea on this?
>> 
>> -Geoff/W5OMR
>> 29655
>> 
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--
keith at goobie.org
Keith Goobie
Richmond Hill, ON, CANADA


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