Remote Party Answer Supervision Software


I am facing a very annoying issue with asterisk CDR log.

All DAHDI outgoing PSTN calls showing as “ANSWERED” and “bill seconds” greater than zero even though the calls were not answered or busy line.

I am using Sangoma (Wanpipe) for connecting with landlines PBX Company.

I know this a known problem for many countries that do not support reverse polarity signal switch at pick-up and hang-up point.

I also understand that there is “Remote Party Answer Supervision” software that analyses the human voice to determine the approximate bill seconds.

Any idea about that software?