VoIP

RFCs

• Voice-Related RFCs
• RFC 3856 - A Presence Event Package for the Session Initiation Protocol
• RFC 3262 Reliability of Provisional Responses in the Session Initiation Protocol
  • 临时响应的可靠传输
  • RFC4028 的不足与 SIP KEEP-ALIVE 方法
• RFC 4028 - Session Timers in the Session Initiation Protocol
  • 会话刷新
• RFC 3261 SIP: Session Initiation Protocol
  • https://tools.ietf.org/html/rfc3261
  • 定义了使用 OPTIONS 来检测状态
    • asterisk 中的 qualify
• RFC 2833 - RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals
  • https://tools.ietf.org/html/rfc2833
• RFC 4733 - RTP Payload for DTMF Digits, Telephony Tones, and Telephony Signals
  • 替代 RFC 2833
  • https://tools.ietf.org/html/rfc4733
• RFC 6913 - Indicating Fax over IP Capability in the Session Initiation Protocol (SIP)
  • https://tools.ietf.org/html/rfc6913