Hi, I'm using pjsua-lib from pjproject-0.8.0 and from the latest checkout on Mac OS X 10.5.2 (Intel). With the minimum code provided below, "ps aux" shows about 7.2 in %CPU. This is after "sound_port.c EC suspended because of inactivity" console output. Is that the way it should be? #include <pjsua-lib/pjsua.h> int main(int argc, char *argv[]) { pjsua_create(); pjsua_init(NULL, NULL, NULL); pjsua_start(); for (;;) { char option[10]; fgets(option, sizeof (option), stdin); if (option[0] == 'q') break; } pjsua_destroy(); return 0; } -- Alexei Kuznetsov