[App_rpt] Questions

Stephen Rodgers hwstar at rodgers.sdcoxmail.com
Sat Feb 16 02:29:22 EST 2008


If the Linux distro you are using uses udev for devices you should be
able to write some udev rules to force the load order for the sound card
and the usb fob, provided you don't have two devices of the same type.

Where udev breaks down is when you have multiple USB or Zaptel devices
of the same type. The load order in these cases can be unpredictable.

David Powell-Williams wrote:
> Dave,
> There have been lots of changes to chan_usbradio since September 2007  I
> would suggest you do the following updates then report back on any
> issues you still have:
> 1. Update asterisk and libpri zaptel to the latest stable "tarball"
> releases mentioned on asterisk.org.
> 2. Grab the latest SVN of chan_usbradio.c and all the files in the xpmr
> directory at:
> https://www.xelatec.com/viewvc/app_rpt/asterisk/trunk/channels
> 3. Grab the latest SVN of app_rpt.c at:
> https://www.xelatec.com/viewvc/app_rpt/asterisk/trunk/apps/
> 4. Download the initial asterisk configuration files from;
> http://limeylinux.org/downloads/configs.tar.gz
> There are 4 directories underneath the main directory inside this
> tarball. There is one directory for each of the hardware platforms
> supported. Use only the files in the usbradio directory and the top
> level directory. Put all files in /etc/asterisk.
> Steve WA6ZFT
> *********************************************
> Steve:
> I followed your suggestions and recompiled with:
> Asterisk		1.4.18
> Zaptel		1.4.8
> Libpri		1.4.3
> Chan_usbradio	SVN rev 391
> App_rpt		SVN rev 416
> Things are much improved, as you predicted. 
> The one-way audio seems cured. I note that the audio levels through the USB
> FOB interface came up by about 20 dB in each direction, requiring a
> recalibration with radio tune. I also noticed that if Linux is rebooted with
> the FOB installed, the 2.6.22 kernel grabs the FOB as its primary audio
> device in preference to the normal sound card.  As we all know, Linux
> reboots are a rarity but, unless one wants to play moh over the radio, it
> seems best to plug the FOB in after Linux is up and before Asterisk is
> started.
> If anyone else is recompiling Asterisk with chan_usbradio and app_rpt, I
> have made up a cheat sheet that may be useful.  It can be obtained for the
> price of an email.
> Thanks very much for the pointers. I'll get my assigned node number plugged
> in and look forwards to hearing you and the other Allstar Link members.
> 73,
> Dave
> VE7MQ.
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