как уже выше кидал лог
-- Executing [6929@from-upstream:4] Read("PJSIP/upstream-00000000", "ROOM,conf-getpin,11") in new stack
-- Accepting a maximum of 11 digits.
-- <PJSIP/upstream-00000000> Playing 'conf-getpin.gsm' (language 'ru')
-- User entered nothing.