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RFC 8866 / MECHANISMS

Time and direction are independent

04

A session schedule and a media direction attribute answer different questions.

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DIAGRAM§ 5.9 ↗
RFC 8866 · § 5.9EXAMPLE
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Time and direction are independentA session schedule and a media direction attribute answer different questions. Current state: Two separate facts.Time and direction are independentt=0 0 · unbounded schedulea=sendonlyreverse directionScheduled does not mean bidirectional
03
Two separate facts

An active session schedule does not imply bidirectional media.

Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
KEY POINT

t= uses NTP-format seconds for start and stop times.

  • t= uses NTP-format seconds for start and stop times.
  • t=0 0 describes an unbounded session time.
  • sendrecv, sendonly, recvonly, and inactive describe media direction under their scope.
DETAILS

The illustration is schematic. Example values are illustrative; profiles and later security guidance can add requirements.

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  1. A description is ordered lines
  2. Session scope and media scope
  3. An m line describes transport
  4. Time and direction are independent
  5. A description is not authorization

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RFC 9700 / CHAPTERS

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