I have Asterisk Server with Static IP no NAT (Location A)
I have a 3rd party company (Location B) connecting to my Asterisk Server.
I have my endpoint (Location C)
The 3rd party company can connect to my server and can see the ringing of the phone but they can’t hear me at location C. I can hear them and respond but they cant hear me.
I believe their endpoints are behind a NAT and I have no control over their network. Are there any solution I can provide them. I been reading on STUN, TURN and ICE but not sure what would be best? Is it included with Asterisk? Maybe there is something on their router they need on like ALG?
Any help or suggestion would be appreciated it