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DUV1000 User’s Guide
4
¾ Intelligent selection of codec (G.723 or G.729A) based on Internet connection speed.
¾ Excellent voice quality and low end-to-end delay using low latency adaptive jitter buffer,
silence suppression, and comfort noise generation techniques.
¾ User-friendly hands-free dialing method.
¾ Make multiple calls without connecting to the Internet each time.
¾ Call transfer, last number redial, and adjustable speaker volume control.
¾ Password protection to your valuable configuration information.
¾ Remote software update support.
1.1 Acronyms
LED Light Emitting Diode
IP Internet Protocol
ISP Internet Service Provider
PPP Point-to-Point Protocol
PSTN Public Switched Telephone Network
RTP Real Time Protocol
SIP Session Initiation Protocol
TFTP Trivial File Transfer Protocol
VOIP Voice Over Internet Protocol, same as Internet Telephony
1.2 Definitions
Idle State: DUV1000 is said to be in idle state when the speaker is off, LEDs are off and handset
is on Hook.
Configuration state: DUV1000 goes to configuration state to edit and verify the configuration
information.
Receive state: DUV1000 goes to this state to receive calls from other phones. In this state,
phone is always connected to Internet.
Speaker Mode: You can dial a phone number in hands free mode and listen to call progress
messages.
Handset Mode: You can lift the handset any time to listen. If the speaker is on while lifting, it is
turned off automatically.