At our site we have an older Intel based platform running three URI USB fobs. It is running in a nominal manner, but we did spread out the URI to different usb buses, and we experienced better audio performance (less clipping) when we implemented / reversed the DTMF relaxed parameter. We acquired a SuperMicro 5017C-MTF server, intended to replace our existing platform. It has four USB ports. Expansion / addition of new ports can only be done through a PCIe interface. Initially we installed a USB3.0 card - epic fail through lack of research as USB 3.0 is not supported on Centos 5.x environments. OK, secured a USB 2.0 PCIe card. Installed, moved two URI over and all good - audio quality is good. As soon as the environment was set up to run three, audio became garbled. Spoke with DMK and they did indicate PCIe USB interfaces can be prone to bandwidth issues. We are left to consider: 1. XIPPR trial, will run on Centos 6.x, facilitating use of USB3.0 card, but bandwidth will likely continue to be an issue. 2. Consider use of simpleusb interface, assuming less bandwidth issues. Based on info above, I am open to guidance or comments. Keith On 3/26/14 10:56 AM, "Doug Bade" <kd8b@thebades.net> wrote:
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@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of Keith Goobie Sent: Wednesday, March 26, 2014 7:59 AM To: kk6ecm; Geoff Cc: app_rpt-users@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@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@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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