Hello, I'm new to this list, so greetings everyone. I'm trying to use pjsua application to test some different SIP PBX platforms. Everything seems fine, so far I have just two questions: 1) Is it possible to put into config-file a command that will make multiple simultaneous calls? I know putting one "sip:account at server.com" works fine, the call is proceeding, but how to add multiple calls directly into config file? 2) When running two instances of pjsua on the same machine, is there a problem with accessing a sound device? I'm getting this: 10:23:13.492 pjsua_media.c Unable to open sound device: Device unavailable [status=269984] 10:23:13.492 pjsua_media.c Error opening sound device: Device unavailable [status=269984] on the called application. The calling one shows no errors (though it's the called one, that initiates sound transfer..). I've read somewhere that you should make sure no other app is using the sound device when using pjsua. Is there a way to make two instances work simultaneously? Thanks for any answers. Martin Fiala