VoIP Spec 彙整 李思銳

Codec G.711 G 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 CLIP: Caller ID Presentation Bellcore, ETSI FSK, DTMF Pre-Ringing, First Ringing Polarity Reverse

DTMF DTMF: Dual Tone Multi-Frequency 0, 1, …, 9, *, #, A, B, C, D Silence Gap Transfer Mode 1. inband 2. RFC SIP INFO

Jitter Buffer Static or Dynamic Optimal for delay Optimal for quality

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

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

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

Gain Mute In Gain Out Gain Auto Adjust

Flash Key Duration 300ms 600ms

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

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

SMS SMS over PSTN SMS over SIP

DND and Forwarding Do Not Disturb Busy Forward No Answer Forward Unconditional Forward

Transfer Unattended Attended Instant Messaging Blind Transfer

Hold Call Hold Consultation Hold Semi-Consultation Hold MOH: Music on Hold

3-way Conference Local Third Party is Added Third Party Joins

Call Waiting Call Waiting Tone Call Waiting with Caller ID Call Waiting Pickup

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

Other Call Functions Call Following Me Call Park Call Pickup Automatic Call Return

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

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

Prefix Remove, Prefix Add Trail Remove, Trail Add Speed Dial Phone Book Hot Line

QoS ToS Diff-Serv VLAN Tag

Multi-Homming with SIP Server Master and Alterative SIP Server Dialing Plan

Auto-Provision HTTP / FTP / TFTP Zero Configuration TR-069

User Interface LCD / Button Web CLI: Command Line Interface

Management SNMP: Simple Network Management Protocol CDR: Call Detail Records Status Report: 1. Registrar Status 2. Line Status

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