> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/telecom-references/protocols/srtp-relay-support-for-encrypted-sip-interconnections.md).

# sRTP relay support for encrypted SIP interconnections

> **Applies to:** SBC 3.1

When using SIP TLS, sRTP is also used to encrypt the media. In the case where sRTP is used on both call legs in the PRoSBC, sRTP relay is used.

Encryption keys are passed from one leg to the other followed by a forwarding of the RTP without modifications.

### References

* [Information on sRTP encoding and decoding](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/protocols/support-srtp-encoding-and-decoding/README.md)


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