RTP Timestamp

As a media flow with injected RFC 2833 telephone-event packets exits the Oracle® Enterprise Session Border Controller, the newly generated RTP packets are timestamped in one of two ways. If RFC 2833 generation is preformed in the NPs, the default method of creating the timestamp for a generated RFC 2833 packet is to use the previous RTP packet’s timestamp and add 1.

Alternatively, the Oracle® Enterprise Session Border Controllercan estimate the actual time that the injected RFC 2833 telephone-event packet will leave the system and use that. This method tags the injected DTMF indication packet more accurately than the than previous packet + 1 method. As an additional bonus, the packet’s checksum is regenerated. This alternate timestamp creation behavior is configured by setting the rfc2833-timestamp parameter to enabled.

When RFC 2833 telephone-event generation is preformed by the transcoding modules, the packets’ timestamps are the set to the time that the packets leave the Oracle® Enterprise Session Border Controller,.