Hi, I have a simple SIP app (on Linux, interested in other platforms as well) with one polling thread. After pjsua create, initialize and start I see 4 more threads are spawned in my app, one of these has a name 'threaded-ml', others do not have specific names. These 4 threads live all time. Unfortunately I was not able to find any helpful information on what, how many, and/or why pjsua creates threads, except the working thread (I have only one). Could someone, please, give me some input on this topic? Best Slava