Support SRTP encoding and decodings

This article applies to:	Product	Version
	SBC	3.1

FreeSBC/ProSBC supports the encoding and decoding of SRTP. This enables the SBC to be on the boundary of a private network where RTP is unencrypted, and to relay the RTP to a "public" network where encryption is required. This is typically done when encryption cannot be used end-to-end.

To learn about SIP stack configuration, refer to FreeSBC/ProSBC Web Portal 3.1: Protocol Stacks.

The setting for SRTP (RTP Security mode) is configured using the RTP Security Mode parameter, described here: Profile Page, Media Relay-RTP Security Mode parameter.