The ims_usrloc_scscf module lacks module documentation in git master:

~/repositories/kamailio/src/modules/ims_usrloc_scscf> ls -la README doc* ls: cannot access 'README': No such file or directory ls: cannot access 'doc*': No such file or directory

The purpose of this module and also its parameters that are exported should be documented in a doc/*.xml files like the other modules. This are the exported parameters from the source code:

{"timer_interval", INT_PARAM, &timer_interval }, {"desc_time_order", INT_PARAM, &desc_time_order }, {"matching_mode", INT_PARAM, &matching_mode }, {"cseq_delay", INT_PARAM, &cseq_delay }, {"fetch_rows", INT_PARAM, &ul_fetch_rows }, {"hash_size", INT_PARAM, &ul_hash_size }, {"subs_hash_size", INT_PARAM, &subs_hash_size }, {"contacts_hash_size", INT_PARAM, &contacts_hash_size }, {"nat_bflag", INT_PARAM, &nat_bflag }, {"contact_delete_delay", INT_PARAM, &contact_delete_delay }, {"usrloc_debug_file", PARAM_STR, &usrloc_debug_file}, {"enable_debug_file", INT_PARAM, &usrloc_debug}, {"user_data_dtd", PARAM_STRING, &scscf_user_data_dtd}, {"user_data_xsd", PARAM_STRING, &scscf_user_data_xsd}, {"support_wildcardPSI", INT_PARAM, &scscf_support_wildcardPSI}, {"unreg_validity", INT_PARAM, &unreg_validity}, {"maxcontact_behaviour",INT_PARAM, &maxcontact_behaviour}, {"maxcontact", INT_PARAM, &maxcontact}, {"maxcontact_3gpp", INT_PARAM, &maxcontact_3gpp}, {"max_subscribes", INT_PARAM, &max_subscribes}, {"sub_dialog_hash_size",INT_PARAM, &sub_dialog_hash_size}, {"db_mode", INT_PARAM, &db_mode}, {"db_url", PARAM_STR, &db_url}, {"timer_procs", INT_PARAM, &ul_timer_procs},