On 11/03/12 14:07, Tzafrir Cohen wrote:
On Sun, Mar 11, 2012 at 12:05:48PM +0000, Sebastian Arcus wrote:
Hi all,
I've tried to explicitly set my two PSTN trunks/FXO lines to alaw with:
alaw = 1-2
in /etc/dahdi/system.conf. However, when I do this, all I get is
loud intense noise on the line and nothing else - can't dial, can't
make calls, can't receive calls. If I omit it altogether, everything
works fine.
As I'm in the UK - I thought Europe uses alaw on phone lines
No, they don't. Phone lines are analog. ulaw / alaw settings here are
internal to DAHDI. The digital PCM gets converted to analog "audio"
(voltage level) on the adapter.
- how
come Asterisk seems to be using only ulaw - and alaw won't even
work? Config examples on the Internet seem to suggest that it should
work.
Though it is, indeed, a bug.
Thank you Tzafrir. I initially though that the signal being analog, it
can't be encoded with a digital compression algorithm - but as config
examples online kept on suggesting the setting - I thought I would try it.
--
Linux vehicle CCTV - www.open-t.co.uk/iroko
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