#define PJSUA_MAX_CALLS                 400
#define PJSUA_MAX_ACC                   400
#define PJ_IOQUEUE_MAX_HANDLES          400
#define __FD_SETSIZE                    800
#define PJSUA_MAX_PLAYERS               400

cfg->max_calls = ((PJSUA_MAX_CALLS) < 400) ? (PJSUA_MAX_CALLS) : 400;