IP20

• Mute, Flash, Speaker, Hold and Redial function.
• Supports message waiting lamp key with retrieval function.
• The volume can be adjusted in 5 levels.
• Supports DHCP (dynamic host configuration protocol) and static IP address protocol for getting IP address.
• Supports PCMU, G.723.1,G.729a/b, PCMA speech decoding algorithms.
• Supports RFC2833, SIP INF, and other DTMF transmission mode.
• Supports IEEE802.1 Q standard, IEEE802.3 as standard.
• Supports SIP protocol’s standards.
• Supports updating the program by HTTP.
• Dynamic voice detection; Voice polishing; Voice buffering
• Integrated Poe power supply and easy for installation.