# Changelog
## v0.5.0
### Features
- Initial version of `esp_sip_service`
- Support SIP registration, outgoing calls, incoming calls, answer and hangup
- Support full-duplex media on a single instance as `ESP_MEDIA_ROLE_SRC_SINK`
(stream 0 uplink sink, stream 1 downlink source)
- Support SDES-SRTP negotiation modes, out-of-band DTMF (RFC2833) and SIP MESSAGE
- Support custom INVITE headers, private headers and raw header inspection
- Support P2P mode that skips registration for direct device-to-device calls
- Support media-service links and MCP control tools