Asterisk 13.8.5 Server on Centos 7 Server x86_64 stabled, installed and configured for PJSIP and Extensions.Conf files only. I can see the endpoints, aors and auths within the on console, firewall configured for SIP and RTP Traffic plus Media, MaxContacts in PJSIP is set to 1 just for testing, Using Zoiper5 Free Edition for testing and it registers, I can dial my extension from Asterisk Console, Zoiper is open on my mobile and the mobile rings. NICE
I try calling a different extension from the mobile using Zoiper5, the extension shows up available in the console, the other extension will ring but there is no voice. All suggested changes for Zoiper5 was complied with such as sip, rtp, domain, username, password, auth username, caller id name/number, no stun, dtmf rfc-2833, BLF, Force RFC-3264, and no rport. Transport is set for UDP. Any suggestions would be greatly appreciated.