Dear Kaloyan, thanks for your reply, after few hours of debugging we finally found the problem and SAM is working now. Code in libss7 and chan_dahdi is OK, but T10 timer has no default value defined, so if it is not defined by user in chan_dahdi.conf, it is treated like T10==0, so the code won't wait for another SAM digits. I'm very happy that libss7 1.0.2 has already backports from 2.0.1 inside and working, that's great job that you and others did. Thank you very much! M.R. On 10/25/2012 03:26 PM, Kaloyan Kovachev wrote: > Hi, > sorry for the delayed replay (been busy with hardware probs) > > I hope you are not using ANSI, as it does not support overlap dialing. You > should also have defined (uncommented) the ISUP T10 timer > The function responsible for the release is ss7_match_extension() and it > sends it in case no extension can be matched or no T10 is defined >