VoIP Spec ??

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VoIP Spec ??

• ???voip_taiwan_at_yahoo.com.tw

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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

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CLIP

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

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DTMF

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

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Jitter Buffer

• Static or Dynamic
• Optimal for delay
• Optimal for quality

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AEC

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

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CPT

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

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FAX

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

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Gain

• Mute
• In Gain
• Out Gain
• Auto Adjust

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Flash Key

• Duration300ms600ms

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Ptime

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

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Early Media

• Interactive Voice Response
• CRBT Color Ring Back Tone
• Distinctive Ringing
• 180 Ringing / 183 Call Progress

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SMS

• SMS over PSTN
• SMS over SIP

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DND and Forwarding

• Do Not Disturb
• Busy Forward
• No Answer Forward
• Unconditional Forward

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Transfer

• Unattended
• Attended
• Instant Messaging
• Blind Transfer

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Hold

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

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3-way Conference

• Local
• Third Party is Added
• Third Party Joins

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Call Waiting

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

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CLIR and COLR

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

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Other Call Functions

• Call Following Me
• Call Park
• Call Pickup
• Automatic Call Return

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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

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Dialing Plan

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

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

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QoS

• ToS
• Diff-Serv
• VLAN Tag

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Multi-Homming with SIP Server

• Master and Alterative SIP Server
• Dialing Plan

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Auto-Provision

• HTTP / FTP / TFTP
• Zero Configuration
• TR-069

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User Interface

• LCD / Button
• Web
• CLI Command Line Interface

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Management

• SNMP Simple Network Management Protocol
• CDR Call Detail Records
• Status Report1. Registrar Status2. Line Status

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Others

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