Hello. I'm using python bindings to pjsip to make my own calling station. I'm using sipnet.ru as SIP-provider to call to Russia numbers. Sometimes all working fine, but sometimes (about 50% chance) my script (slightly modified version of tutorials's script) freezes at MyAccountCallback.wait() method. Enabling debug shows me following: 14:31:12.034 sip_transport. Error processing 468 bytes packet from UDP 212.53.40.40:5060 : PJSIP syntax error exception when parsing '' header on line 7 col 24: SIP/2.0 401 Authentication required Via: SIP/2.0/UDP 10.10.10.48:5080;rport=5080;branch=********************************************** From: <sip:*******@sipnet.ru>;tag=5e33f54f-225c-4274-*******-************ To: <sip:danikp at sipnet.ru>;tag=************** Call-ID: f2fc18fd-3eca-4be1-b685-************************* CSeq: 57058 REGISTER WWW-Authenticate: NTLM realm="etc.tario.ru",qop="auth",targetname="etc.tario.ru",opaque="********69-212.53.***.***" Server: RTC/3.0 Content-Length: 0 -- end of packet. It's bug in library, not mine code, am I right? P.S. Is there pjsim bugtracker? I can't found one... -- ---------------- Best regards Elf mailto:elf2001 at gmail.com