[leejor]

You PM'd me with exactly the same question that you posted above??? Why?

I'll post the answer that I sent back to you so that anyone else can make additional comments.
when i responded I didn't realize who you were, (the member with all of the VPN, blocked VoIP problems), so the comments about trying a different router, really don't apply.

16:51:14.900 [CM503008]: Call(68): Call is terminated
16:51:06.455 Currently active calls - 1: [68]
16:50:37.891 Session 11625 of leg C:68.1 is confirmed
16:50:37.758 [CM503007]: Call(68): Device joined: sip:me@77.72.174.128:5060
16:50:37.755 [CM503007]: Call(68): Device joined: sip:200@2.50.164.230:1027;transport=UDP;ob
16:50:37.752 [MS210001] C:68.2:Answer received. RTP connection[unsecure]: 194.120.0.153:41956(41957)
16:50:37.750 Remote SDP is set for legC:68.2
16:50:36.421 Currently active calls - 1: [68]
16:50:25.851 [MS210003] C:68.1:Answer provided. Connection(transcoding mode[unsecure]):92.96.3.131:9018(9019)
16:50:25.850 [MS210001] C:68.2:Answer received. RTP connection[unsecure]: 194.120.0.153:41956(41957)

You don't say, but I'm going to assume that it is you, that can't hear callers, correct?
I'm not sure how you have your port forwarding set up, or what type of router/firewall you are using , or what options are set, all of that can make a big difference.
I've highlighted some of the ports involved with the voice packets, the 9000 series is usually the only series that you need to forward, but, you may want to try putting the 3CX PC in the DMZ IP and see if everything works. If so start opening some port ranges for testing.
I see that transcoding is mentioned. Be sure that 3CX is set to use the default Codec (or at least an allowable Codec) that your provider uses.

If you are still stuck, and it's possible, try a different router, an old one is usually sitting around somewhere, or can be borrowed. The simpler the better, I've found

[elios115]

yes, it is me man who has one way voice.
all the ports 9000-9049 were forwarded.
im using the default codec.
indeed the blocked voip is a big problem that i had to overcome.

i ll try to go to DMZ mode. i ll get back to u.
regards,