version 1.8.10 If the pjsua client gets a two or more sip invites where the first invites are unanswered, you can only answer the first one of them using the 'a' command. From: "Mike" <sip:6208@192.168.15.159> To: <sip:6225 at 192.168.15.5;ob> Press a to answer or h to reject call 01:52:14.165 pjsua_app.c Incoming call for account 0! From: "6288" <sip:6288@192.168.15.159> To: <sip:6225 at 192.168.15.5;ob> Press a to answer or h to reject call a Answer with code (100-699) (empty to cancel): 01:52:19.337 pjsua_acc.c sip:6225 at 192.168.15.159: registration success, status=200 (OK), will re-register in 300 seconds 200 01:52:20.211 pjsua_app.c Media for call 0 is active 01:52:20.211 pjsua_app.c Call 0 state changed to CONNECTING >>> 01:52:20.212 pjsua_app.c Call 0 state changed to CONFIRMED a No pending incoming call >>> dd ....snip.... Dumping dialog sets: [in] [est] To: "Mike" <sip:6208 at 192.168.15.159>;tag=as40aa51c0 [in] [ - ] To: "6288" <sip:6288 at 192.168.15.159>;tag=as6ba88b20 ....snip.... The first one call is answered, the second is stuck in limbo and unable to be answered.