hi i have a problem : i have 2 same softphone , 1 can call the other and the other cannot call the previous. it's the same configuration for both in the softphone. i did test about this that can't call: i change the softphone, i change the laptop, i use the user that this can call use and change with mine... in basis ser.cfg what do the difference between 2 users ? nothing i guess i'm using a stun to pass over nat and it works in one direction (from one user to the other) it didn't work someone has an idea thanks M.