# Support sRTP encoding and decoding

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 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](/hidden-pages/support-srtp-encoding-and-decoding/modifying-media-relay-profile-settings.md).

### References

* [Information on sRTP relay](/hidden-pages/srtp-relay-support-for-encrypted-sip-interconnections.md)


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