Hi List, We downloaded latest version of PJSIP (2.0.1) and installed on iOS device, it is working excellant on Foreground. But in background it is not re-registering in specified expire time. Because of this IPJSUA's entry is getting deleted at SIP Server. After 10 seconds or so, IPJSUA is trying to re-register with SIP Server by the time IPJSUA's TCP socket has been closed. IPJSUA is reporting "SIP registration failed, status=503 (End of file (PJ_EEOF))" and re-registering in within 2 seconds. Here is the log (Please see complete log in attached file) Aug 7 17:59:17 unknown ipjsua[3586] <Warning>: 17:59:17.659 tcpc0x9b7e14 TCP connection closed Aug 7 17:59:17 unknown ipjsua[3586] <Warning>: 17:59:17.662 pjsua_app.c SIP tcp transport is disconnected from [69.X.X.101:5060]: End of file (PJ_EEOF) [status=70016] Aug 7 17:59:17 unknown ipjsua[3586] <Warning>: 17:59:17.666 pjsua_acc.c ..SIP registration failed, status=503 (End of file (PJ_EEOF)) Aug 7 17:59:17 unknown ipjsua[3586] <Warning>: 17:59:17.669 pjsua_acc.c ..Scheduling re-registration retry for acc 2 in 8 seconds.. Aug 7 17:59:17 unknown ipjsua[3586] <Warning>: 17:59:17.672 pjsua_acc.c Disconnected notification for transport tcpc0x9b7e14 Aug 7 17:59:17 unknown ipjsua[3586] <Warning>: 17:59:17.675 pjsua_acc.c .Scheduling re-registration retry for acc 2 in 2 seconds.. Aug 7 17:59:17 unknown wifid[13] <Error>: WiFi:[366035357.680521]: Disable WoW requested by "spd" Aug 7 17:59:17 unknown ipjsua[3586] <Warning>: 17:59:17.683 tcpc0x9b7e14 TCP transport destroyed with reason 70016: End of file (PJ_EEOF) > Aug 7 17:59:19 unknown ipjsua[3586] <Warning>: 17:59:19.715 pjsua_acc.c Acc 2: setting registration.. Aug 7 17:59:19 unknown ipjsua[3586] <Warning>: 17:59:19.730 tcpc0x9b7e14 ..TCP client transport created Aug 7 17:59:19 unknown ipjsua[3586] <Warning>: 17:59:19.743 tcpc0x9b7e14 ..TCP transport 192.168.0.136:55702 is connecting to 69.X.X.101:5060... Aug 7 17:59:19 unknown ipjsua[3586] <Warning>: 17:59:19.749 pjsua_core.c ..TX 575 bytes Request msg REGISTER/cseq=38765 (tdta0x9c1200) to tcp 69.X.X.101:5060: -- Ramu -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120807/c0aec67d/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: pjsip-bg-mode.rtf Type: application/rtf Size: 4245 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120807/c0aec67d/attachment-0001.rtf>