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D-Link DIV-140 User Guide 4
Following features are supported.
Protocols
• SIP RFC 3261 Compliance
• STUN and IP sharing support for NAT
• RTP and RTCP
• DTMF Tx/Rx support using SIP INFO or Out of Band as per
RFC 2833.
• Fax Support using T.38 Fax Relay and Fax Passthrough
• NTP to keep device time in synchronization
• DNS/SRV RFC 3263 compliance
Features
• DTMF generation and detection
• Fax-tone detection
• Caller ID Detection and Generation
• Custom Caller ID Configuration
• Detection and generation of user-specified tones
• Polarity Reversal Generation
Call Features
• Consultation Call Hold
• Attended and Unattended Call Transfer
• Call Forward (Always, on Busy, on No Answer)
• Call Waiting
• Hot line and Warm line
• ACR
• Hunt Group
• Speed Dial (System wide and per port)
• Phone Book (System wide and per port)
Features
Audio Features
• G.729ab — G.729a with VAD and CNG support
• G.711 µ-law and A-law codec
• G.711 Annex 2. Support for VAD and CNG
• G.723.1 with 5.3 and 6.3 Kbps rates
Voice Quality
• IP layer TOS
• Dynamic/Adaptive Jitter Buffer algorithm
• Packet loss concealment (PLC)
• Echo Cancellation (G.168)
• Gain/Attenuation settings
Miscellaneous
• Forced Call disconnection from WEB/CLI/by dialing in key
sequence
• Upgrade History, Call History, Port Statistics Display
• HTTP/TFTP software upgrade
• Configuration Backup and Restore.
• Syslog Support
• Restore to Factory Default