·     Customizable Elevated Angle

·     Support SIPv2 - Industry Standard

·     Excellent Voice Quality - Support G.711a/u, G.723, G.726, G.729A/B

·     Speakerphone with Volume Adjustment Keys

·     Additional Headset Port Available

·     Three-Way Conference support

·     Power-Over-Ethernet (POE) Support (Optional)

·     Using same phone for both VoIP and Landline (DGP306-O)

 Function Specification

 Network Protocol
 * SIP v1(RFC2543), v2(RFC3261)
 * IP/TCP/UDP/RTP/RTCP 　* IP/ICMP/ARP/RARP/SNTP
 * TFTP Client/DHCP Client/PPPoE Client
 * NAT/DHCP Server 　　　* Telnet/HTTP Server
 * DNS Client/DDNS/VLAN
 Voice Quality
 * VAD/CNG//LEC 　　* Packet Loss Compensation 　
 * Adaptive Jitter Buffer
 Codec
 * G.711/G.723.1/G.726/G.729A/G.729B
 DTMF Function
 * In-Band DTMF 　* RFC 2833 DTMF 　　* SIP Info
 Phone Function
 * Volume Adjustment　　* Speed dial key
 * Phone book 　　　　　* Flash
 IP Assignment
 * Static IP/ DHCP/PPPoE
 NAT Traversal 　　　
 * Web Browser　　　　
 QoS
 * ToS field
 Firmware Upgrade
 * TFTP/Console/HTTP
 Auto-Provisioning
 * FTP/TFTP/HTTP
 Dial Plan
 Other Features
 * Hotline support
 * Alarm support
 * Embedded  Open Source IP PBX Support
 * IP PBX Support