asterisk users - Feb 2006 - No Audio on Local Machine, Remote works fine

I don't even know where to begin.

I run a lot of production Asterisk servers, for a couple of years now, 
with no real problems.

We built a brand new box, CentOS 4.2, and installed Asterisk 1.2.4 from 
source tarball(s). Built fine, and started up fine.

Any attempts to do local audio (e.g. a "Playback(welcome)") results in
complete silence. Worse, the Playback command will hang forever (even if 
the file is tiny), so it's not just "not being heard", it's
like the
command is waiting to do something.

In one specific case (and only in case), I'll hear a 1/2 second burst of 
audio, like it's about to start, and then dead air.

The "Record" command creates a zero length file if the format is ulaw,
and hangs forever after that, and a "wav" format is always 44 bytes 
before the hang.

If I run the "demo-echo-test", I don't hear the prompt, and it
hangs on
the Playback.

OK, now for the weirdness ;-). If I connect this Asterisk to one of our 
other servers, and dial the echo test on the remote server through this 
same server, I hear the prompts, and can hear my voice echoed correctly, 
so this same Asterisk server will happily forward the audio in both 
directions, it just won't "generate" it. This is with
"notransfer=yes",
so this Asterisk is staying in the audio stream.

I'm stumped, and any help or pointers in the right direction will be 
greatly appreciated.

Is ztdummy loaded properly?

I had a similar problem with a system recently.

PaulH

----- Original Message ----- 
From: "Hadar Pedhazur" <hadar@unorthodox.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<asterisk-users@lists.digium.com>
Sent: Thursday, February 02, 2006 8:16 AM
Subject: [Asterisk-Users] No Audio on Local Machine, Remote works fine

> I don't even know where to begin.
>
> I run a lot of production Asterisk servers, for a couple of years now,
> with no real problems.
>
> We built a brand new box, CentOS 4.2, and installed Asterisk 1.2.4 from
> source tarball(s). Built fine, and started up fine.
>
> Any attempts to do local audio (e.g. a "Playback(welcome)")
results in
> complete silence. Worse, the Playback command will hang forever (even if
> the file is tiny), so it's not just "not being heard",
it's like the
> command is waiting to do something.
>
> In one specific case (and only in case), I'll hear a 1/2 second burst
of
> audio, like it's about to start, and then dead air.
>
> The "Record" command creates a zero length file if the format is
ulaw,
> and hangs forever after that, and a "wav" format is always 44
bytes
> before the hang.
>
> If I run the "demo-echo-test", I don't hear the prompt, and
it hangs on
> the Playback.
>
> OK, now for the weirdness ;-). If I connect this Asterisk to one of our
> other servers, and dial the echo test on the remote server through this
> same server, I hear the prompts, and can hear my voice echoed correctly,
> so this same Asterisk server will happily forward the audio in both
> directions, it just won't "generate" it. This is with
"notransfer=yes",
> so this Asterisk is staying in the audio stream.
>
> I'm stumped, and any help or pointers in the right direction will be
> greatly appreciated.
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