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Related articles: |
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The
| Spacevars | ||
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and is
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extended to allow a relay mechanism that transparently passes the DTLS, SRTP, and SRTCP packets end-to-end without DTLS certification or SRTP cryptographic encryption and decryption taking place at
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| Spacevars | ||
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, Lawful Intercept (LI) or 'Tones and Announcements' processing is required on the session, as determined during the initial invite or offer call negotiation
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stage, DTLS-SRTP is not relayed.
Enable dtlsSrtpRelay on both legs of the call for DTLS
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/SRTP stream to be relayed.
| Note |
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DTLS-SRTP relay is a licensed feature and requires an SRTP license to be installed on |
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the |
This feature also adds relay support for DTLS
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-SCTP media streams that is not based on RTP but relayed transparently by
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the
. When the Spacevars 0 product
is configured to relay DTLSSpacevars 0 product
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-SCTP, the DTLS and SCTP packets are transparently passed end-to-end and the peer endpoints establish the DTLS association using each other’s credentials, which are transparently passed by
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the
in the SDP of the SIP signaling messages.Spacevars 0 product
When DTLS-SCTP relay control is not enabled on both legs of the call and if DTLS-SCTP stream is received as a part of SDP with audio and/or video,
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the
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Enable dtlsSctpRelay on both legs of the call for DTLS-SCTP stream to be relayed.
When DTLS-SRTP and/or DTLS
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-SCTP stream requires ICE to traverse NAT, the relay mechanism is supported with ICE procedures terminated locally at SBC. DTLS-SRTP and/or DTLS-SCTP packets are transparently passed by
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the
, once ICE processing is complete.Spacevars 0 product
DTLS-SCTP stream is logged in
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Call Detail Record (CDR) as UDP/DTLS/SCTP in fields 230/231. When a DTLS-SRTP stream is relayed, it is indicated in fields 242/243 where 1 indicates the stream is terminated and 2 indicates the stream is relayed.
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When a session contains DTLS-SRTP video stream or DTLS |
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-SCTP application stream and there is no audio stream specified, |
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the
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| Info |
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In case of WRTC, when ICE is part of session establishment, the relay mechanism implemented for DTLS-SRTP and DTLS |
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-SCTP is supported independent of ICE processing. |
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Overview
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