Hi Kieth, In the usbradio.conf have you got the "txlinonly = yes'? This should limit TX audio coming from the URI. txlimonly=yes ; Audio limiting with no pre-emphasis on output channel: no,yes ; no - Audio is not limited. ; yes - Audio is limited. ; Suitable for transmitters with no limiting but with pre-emphasis. You can also tell the IAX users to cut back their mic gains. I would start here first. Like a lot of people on Echolink they dont have the computer set up properly. I find that head sets sound the best rather than using the internal mics on lapatops. I would leave the codec as Ulaw. dont bother with GSM, has crappy watery audio. Jon VA3RQ On 3/3/2013 11:31 AM, Keith Goobie wrote:
Good day All.
We have had our node up at VE3LSR / VE3UOR for a few months and we all have learned a lot about configuration and operation. It is ACID install and version id is 300.3.
On our asterisk system, we support three nodes:
27211 -- VE3UOR UHF repeater 29133 -- VE3LSR coupled through a RLC-DSP404 controller (often connected to VE3UPS and VE3UHN), and 29154 -- VA3LSR remote link for VE3LSR into VE3MUS -- not too active -- ad-hoc RF link.
I have also been testing out iaxrpt and the WebTransceiver clients.
I am on these systems and the results have been promising. I do notice some clipping on the audio on some stations. Initially I thought it was amplitude related -- over-driving the URI-FOB, but I am now beginning to suspect that it may be network related and in my research I hear the term jitter being used -- which if activated, adjust operation on the receiving end only.
It may be that the system is not powered enough to drive the three uri-fobs. CPU show about 25% busy. [root@VE3LSR etc]# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 4 model name : Intel(R) Pentium(R) 4 CPU 3.00GHz stepping : 3 cpu MHz : 2992.898 cache size : 2048 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc pni monitor ds_cpl est cid cx16 xtpr bogomips : 5985.79
We do think that the system is sufficiently powered.
We are looking for comments & guidance. Are we expecting too much from the system having three fobs connected? We do have good bandwidth into and out of the site.
I am listening to other systems -- most not to busy, so I am not yet able to get a good reference point.
I have not dabbled with the codecs much, but have been focused on using ulaw. I am also testing with GSM -- lower bandwidth.
So as I said before, thoughts or suggestions are welcome.
Keith / VA3YC -- keith@goobie.org Keith Goobie Richmond Hill, ON, CANADA
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