Hi! > I have developed a module in our CRM application using pjsip and SIPEK. > It works perfectly, but sometimes when I try retrieve a held call, it > freezes my application. It looks like a deadlock, but pjsip is still > running and writing to log. It looks like you are using version 1.8.x of pjsip with the sipek net wrapper. From my experience sipek is not compatible with newer versions of pjsip. With 1.5.5 and 1.8 I got some not reproducible behaviour (loss of incoming audio). If you do not need G.722 (which is not working correctly in pjsip 1.0) maybe you should should stick to the pjsip 1.0 which comes with the sipek-sdk. Best Regards J?rg