[Asterisk-Users] Terrible TICKING sound

[Andrew Kohlsmith]

> Currently, I'm working with a tdm400p with 2 FXO, 2 FXS.  the
> persistent "tick tick tick tick" has come back (after 3 days tick-free
> operation).
>
> Has anyone else experienced a similar problem with ZAP channels?  What
> steps did you take to resolve it?

Are you seeing anything in dmesg?  after you've heard some ticking, run dmesg 
and look for anything suspicious about the TDM card; things about power 
module resets and stuff.  I find that when I hear a good click or buzz I see 
that the power supply farted or otherwise confused the card.

Regards,
Andrew