1. check the configuration on U1930 by command "show ringtype" "show subscriber dn 1005", result as blew
the configuration is ok.
2. make network captures on espace 7820, check the SIP header of invite message, result as blew
we know that PBX have send the ring type to IP phone, need to check the configuration of Espace 7820.
3. login to espace 7820 web page, locate to "Phone > Ring", we find all the ring type was not configured.