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We have a new phone vendor replacing our InterTel system with an NEC that will supply inter-office calling between two subnets that are connected with OpenVPN. When a call is placed between 192.168.0.0/24 ad 192.168.1.0/24, the phone rings and the display reflects the correct user, but the user cannot hear any voice when the call is picked up.
I have started tcpdump and port 10030-10050, large UDP datagrams are transferred when the call is placed, but the user on either end cannot hear any voice.
Router on Subnet A is using Tomato Firmware by shibbi, and subnet B is using Kerio firewall.
Thanks in advance.
