c6a915b2_10_Free_Softphone_VoIP_Clients__Explanation
[Login Message] "Trying" (long period) [Solution] Manually configure network setting dialog screen; auto-detect has failed to detect proper settings. [Explanation] 
SIP Call being established by SIP message protocol
Softphones | VoIP Softphone Information | 10 Free Softphone VoIP Clients
Explanation