Our carrier sends us always the callerid in the P-Asserted-Identity field in the SIP header. When a caller calls anonymous, in the INVITE the relevant fields in the header look like: From: <sip:anonymous@anonymous.invalid;user=phone;udp> P-Asserted-Identity: <sip:+PHONENUMBER@IPADDRESS> Privacy: header;user;id When I bridge the call, in the INVITE which is sent to the remote server, the relevant fields in the header look like: From: "anonymous" <sip:+PHONENUMBER@IP-ADDRESS>;tag=K90ap6HBNQDtQ Privacy: id P-Asserted-Identity: "anonymous" <sip:+PHONENUMBER@IP-ADDRESS> But I fo not want to sent the callerid at all, so the fields should be set to: From: <sip:anonymous@anonymous.invalid;user=phone;udp> P-Asserted-Identity: "anonymous" <sip:+anonymous@anonymous.invalid;user=phone;udp> Privacy: header;user;id or drop the P-Asserted-Identity field like: From: <sip:anonymous@anonymous.invalid;user=phone;udp> Privacy: header;user;id Which variables do I need to set before the call is bridged to archive this (I’m still using FS 1.2) Thanks and Regards Markus