I have created Site-to-Site VPN tunnel (IP SEC) between our 2 sites in 2 different location over internet. We want to enable IPT calls to and from both locations. both locations have VOIP setup at their respective Data Centers. The problem we are facing is that Call managers and subscribers are able to communicate with each other and we can IPSec sessions too but voice from either side could not be heard. it gives status of connected once call is through but no voice can be heard. We can make a call from one location but no call can be initiated from the other location.
PLease advise what is missing in this.