registration-interval and min-reg-expire

dear all,

 

I have some question about the parameters registration-interval and min-reg-expire.

when should i configure  registration-interval or min-reg-expire ?

what is the different between the configuration of the two parametres in the sip interface access and sip interface core ?

could i configure the tow parameters ? in this case what is the registration behavior in the registration cache ?

 does the Net-Net SBC caches the registration after or before receiving a response from the real registrar and sets

the expiration time ?

 

could you please explain to me the below value in the registration cache and which parametre from the above parametres to configure in order to change the below value.