I created a ring group, whose members are SIP-user and WSS-user.
I call the ring group.
If the call is received by a SIP-user, then in the Call Detail Record I see his number.
If the call is received by WSS-user, then the number is not visible.
Fusionpbx v 4.4.11.
Freeswitch v 1.10.6 (64bit).