Re: One-Way Audio

Am 28.05.2012 22:56, schrieb Kambiz Darabi:
> First of all, as I'm new to the list, please let me thank you for this
> very helpful piece of software.
>
> I experience a slightly different problem with a USB X-tensions USB
> dongle: in the original post, the ISDN side could hear the SIP side, in
> my case it's the other way round. The SIP phone can reliably hear the
> ISDN. Occasionally, the ISDN side cannot hear the SIP side. And in
> addition, there are random length drop-outs in hearing the SIP side.
>
> I have the following config:
>
> - mISDN, mISDNuser, LCR from two days ago (including changeset 20fbaa
>    'Fix oneway audio with LCR')
>
> - ubuntu lucid with kernel 2.6.32-41-generic
>
> - asterisk 1.8.11.1 on ubuntu
>
> - removed old mISDN from installed kernel in /lib/modules,
>
> - X-Tensions USB HFC card
>
>
> To elaborate a bit on the attribute 'occasionally' from above:
>
> - the very first call to an MSN shows the 'one-way audio' behaviour
>
> - the second and subsequent calls do not show that behaviour, unless the
>    SIP phone hangs up. In that case, the next call has 'one-way audio'.
>
> WIMPy on #asterisk was so kind to help me with testing. He found that
> his HFC-8s card worked correctly, while a USB dongle showed the same
> behaviour as my symptoms. He also had drop-outs with LCR's MOH.
>
> Trying to debug, I find this in the syslog:
>
> 'HFC-S_USB.1: ERROR stop_iso_gracefull for fifo 0.0'
> 'HFC-S_USB.1: ERROR stop_iso_gracefull for fifo 0.1'
>
> but when I increase the debugging level, strange things happen and the
> machine reboots (without a trace of a kernel panic in the logs).
>
> WIMPy also kindly found out that using kernel 3.1.7 with its stock mISDN
> drivers (without installing the current git version), resolves the
> problem. I tried with kernel 3.1.10 and the mISDN drivers which come
> with the kernel (plus the patch in hfcsusb.h for the X-Tension card's
> idVendor and idProduct) and seem to have a working LCR/misdn/asterisk
> combo, so far.
>
> I would be happy if you could look into this issue. I can help with
> testing, if you could give me some pointers as what debug options to use
> or e.g. whether strace would be of any help.
>

It would be good if you could test the version from the actual Linux 3.5 
development kernel, it has an updated mISDN (with the patch for your 
HW), but the USB driver has not all patches from misdn.eu, so maybe it 
will work as well.

Karsten