Enabling RTP-RTCP UDP Checksum Generation

The Oracle® Enterprise Session Border Controller can generate a UDP checksum for RTP/ RTCP packets on a per-realm basis. This feature is useful in cases where devices performing network address translation (NAT) do not pass through packets with a zero checksum from the public Internet. These packets do not make it through the NAT, even if they have the correct to and from IP address and UDP port information. The Oracle® Enterprise Session Border Controller calculates a checksum for these packets and thereby enables them to traverse a NAT successfully.

If a checksum is already present when the traffic arrives at the hardware, the system simply relays it.