Bug 7870 concerns a libpri (E1, PRI ISDN) problem affecting our AMI progressive dialer when the E1 goes down and recovers shortly thereafter. We offer US$200 for the first fix submitted to us and successfully verified by us on-site in production. The fix should meet all the requirements to be incorporated as an official patch into libpri or Asterisk (CVS). Please contact me at cto AT simitel DOT com if you are interested in working on this bug fix.