[Freeswitch-users] Keep alive ping for non registered endpoints

My setup is .. Opensips A ----> Freeswitch ---> Opensips B In freeswitch dialing plan I am using Bridge command to connect Incoming call from Opensips A to Opensips B Is there any way Freeswitch can ping (using options) both A and B opensips to check if they are alive? . From documentation I see that we can enable ping for all "Registered" endpoints as well as "Gateways" but i am unable to figure out how I can use them in my scenario as no end point registers to Freeswitch and not using gateways also (I simply give IP of opensips B in bridge command)