The registrar module has several parameters configuring the registration behaviour: *default_expires*: If the processed message contains neither Expires HFs nor expires contact parameters, this value will be used for newly created usrloc records. The parameter contains number of second to expire (for example use 3600 for one hour). modparam("registrar","default_expires",1800) *min_expires*: The minimum expires value of a Contact, values lower than this minimum will be automatically set to the minimum. Value 0 disables the checking. modparam("registrar", "min_expires", 60) *max_expires*: The maximum expires value of a Contact, values higher than this maximum will be automatically set to the maximum. Value 0 disables the checking. modparam("registrar", "max_expires", 120) Usually the client sends an expiration wish in the REGISTER request and the server can modify it under few constraints and using above parameters. Hope it helps, Samuel. 2007/3/26, Baljeet Gill <Baljeet.Gill(a)csr.com>om>: