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VoIP Spec 彙整

VoIP Spec 彙整. 李思銳 voip_taiwan@yahoo.com.tw. Codec. G.711 G.723.1 G.729 G.726 G.727 PCM16. GSM iLBC AMR MP3. VAD and CNG. Silence Compression VAD: Voice Activity Detection CNG: Conform Noise Generation 1. transparent through voice 2. RTP payload type: 13 or 19. CLIP.

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VoIP Spec 彙整

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  1. VoIP Spec 彙整 李思銳voip_taiwan@yahoo.com.tw

  2. Codec • G.711 • G.723.1 • G.729 • G.726 • G.727 • PCM16

  3. GSM • iLBC • AMR • MP3

  4. VAD and CNG • Silence Compression • VAD: Voice Activity Detection • CNG: Conform Noise Generation1. transparent through voice2. RTP payload type: 13 or 19

  5. CLIP • CLIP: Caller ID Presentation • Bellcore, ETSI • FSK, DTMF • Pre-Ringing, First Ringing • Polarity Reverse

  6. DTMF • DTMF: Dual Tone Multi-Frequency • 0, 1, …, 9, *, #, A, B, C, D • Silence Gap • Transfer Mode1. inband2. RFC 28333. SIP INFO

  7. Jitter Buffer • Static or Dynamic • Optimal for delay • Optimal for quality

  8. AEC • Echo Canceller • G.165 • G.168 • Length (? ms)

  9. CPT • Call Progress Tone • Dial Tone, Ringback Tone, Busy Tone, Warning Tone, Call Waiting Tone • Frequency and Cadence

  10. FAX • T.38 • G.711 pass-trou • FAX / Modem Tone

  11. Gain • Mute • In Gain • Out Gain • Auto Adjust

  12. Flash Key • Duration300ms600ms

  13. Ptime • Packetization Time, Sampling Rate • G.723.1: 30ms • G.711/G.729: 10ms, 20ms

  14. Early Media • Interactive Voice Response • CRBT: Color Ring Back Tone • Distinctive Ringing • 180 Ringing / 183 Call Progress

  15. SMS • SMS over PSTN • SMS over SIP

  16. DND and Forwarding • Do Not Disturb • Busy Forward • No Answer Forward • Unconditional Forward

  17. Transfer • Unattended • Attended • Instant Messaging • Blind Transfer

  18. Hold • Call Hold • Consultation Hold • Semi-Consultation Hold • MOH: Music on Hold

  19. 3-way Conference • Local • Third Party is Added • Third Party Joins

  20. Call Waiting • Call Waiting Tone • Call Waiting with Caller ID • Call Waiting Pickup

  21. CLIR and COLR • CLIR: Calling Line ID Restriction • COLR: Connected Line ID Restriction • Call Accept • Call Block • Call Transfer/Forwarding

  22. Other Call Functions • Call Following Me • Call Park • Call Pickup • Automatic Call Return

  23. NAT Traversal • STUN: Simple Traversal of UDP over NATs • TURN: Traversal Using Relay NAT • UPNP: Universal Plug and Play • ALG: Application Layer Gateway • Outbound Proxy

  24. Dialing Plan • Min Digits, Max Digits • Terminal Digit • Start Timeout, Short Timeout, Long Timeout • Full Match, Partial Match

  25. Prefix Remove, Prefix Add • Trail Remove, Trail Add • Speed Dial • Phone Book • Hot Line

  26. QoS • ToS • Diff-Serv • VLAN Tag

  27. Multi-Homming with SIP Server • Master and Alterative SIP Server • Dialing Plan

  28. Auto-Provision • HTTP / FTP / TFTP • Zero Configuration • TR-069

  29. User Interface • LCD / Button • Web • CLI: Command Line Interface

  30. Management • SNMP: Simple Network Management Protocol • CDR: Call Detail Records • Status Report:1. Registrar Status2. Line Status

  31. Others • Session Modification: SIP re-invite • (Remote) syslog • Debug / Trace Message • SIP with TLS support • SRTP • SIP / H.323 / MGCP / Megaco Integration

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