Hello,
I am a beginner in voip and I just set up my asterisk server on debian (on parallel desktop).
I set up two accounts on two sip clients (on a mac and the other on centos parallel desktop) and the incoming / outgoing call happens but there is no sound on both sides.
And here is the tutorial that I followed for the implementation of the asterisk server:
denisrosenkranz.com/tuto-install … et-ubuntu/
Tanks in advance 
What is the question?
My question is : i can make call between two client phone sip but i hear any voice from two side.
There is no problem on my laptop mac book pro. because i can use skype and facetime to talk with my friends.
I give you more detail.
I use parallel desktop on my laptop mac book pro. In the virtual host i have set up debian, centos.
The server asterisk is on debian & twinkle sip is on centos. Funaly x-lite on my mac.
The call is passing between twinkle sip on centos & x-lite on mac bu i can’t hear any voice.
Tanks for your answer
Are all devices inside the same LAN?
Did you check firewalls on all machines, specially on the Asterisk server?
Hello,
sory for my late response, i had disabled all firewall to ovaid this problem.
And i talk about that with a friend and he told me that related to codecs.
Tanks in advance