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 voice2. 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. inband2. RFC 28333. 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

Duration300ms600ms

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 Status2. Line Status

Others

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

Integration