Yes, some of the DSL connections in Karachi is down since Thursday, November 19, 2009 and after knocking all the doors at PTCL my problem is just now resolved. I was told that it was a small glitch at PTCL end and my port has been rest and it is working fine.
It took PTCL four days to reset the port and I am afraid how they are supporting corporate customers with this kind of support / processes in place.
AH