No Audio after 30 seconds - 1 minute

[Syd Carter]

Hi all.  I just added a X100P FXO card to my otherwise non-zap based 
system.  All seemed to go well, able to dial out and dial in.  But then 
after about a minute or so, I lost all audio; on all channels..  I'm 
going to do some testing to determine if this is a heating problem 
(already moved the card to another PCI slot) but in the meantime I 
wonder if anyone has experienced this before and has some advice.  If 
the heating issue doesn't pan out then my next guess is to d/l the 
latest zaptel driver and recompile.  Will I need to modify the 
spinlock.h file (using latest CentOs).  Thanks for the advice.. Syd