asterisk users - Oct 2005 - Overlap dial and "match as you go" = how to implement early dial on telco line

Hi,

I have Asterisk between PBX and telco line. PBX is reporting number in 
overlap dial manner.

I'd like to early connect to telco line as soon as I get for instance two 
numbers, that distinguish telco calls. But the problem is if I receive 3 
numbers at once, then two numbers dialplan rule will not be matched....

I've found some references to similar problems, but I'm not sure which 
solution was included in Asterisk (if any)....

So I'd kindly ask if anyone has working solution or has idea how to do this 
on recent Asterisk to describe it...

Thanks in advance,

regards,

Rob.