Protocol Standard:
 IEEE 802.3
 QoS:
 ToS, DiffServ DSCP, 802.1P, 802.1Q
 Codec Standard:
 ITU G.711, G.723.1/A, G.726, G.729A/AB, T.38.
 Call Control:
 SIP

• Voice Activity Detection/Adaptive Comfort Noise Generation
• Silence Suppression/Echo cancellation
• Jitter buffer parameters and adaptive jitter removal
• Remote upgrade
• Two simultaneous calls with active complex codec
• SNMP supported
• Flexible NAT with broad range of support for port sensitive Internet applications
• Wide range of security features such as firewall and DoS attack
• Supports BOOTP, DNS, TFTP, ICMP, SNTP

Call Features

• 3 Way Conference
• Call Transfer
• Call Forwarding on Ring-no-answer, Busy, and All
• Call Return/Waiting/Holding
• Caller ID/ID with Name
• Call Waiting Caller ID
• Caller ID Blocking
• Call screening
• Stutter Dial Tone
• Anonymous Call Rejection
• Selective Call Rejection
• Block specific outgoing call prefix and numbers
• Message Service (Voice Mail) supported
• Voice announcement of the IP address

Network Protocol and Standards Compatibility

• IEEE802.3 CSMA/CD
• IEEE802.3u 100BaseTx
• SIP Protocol
• RFC 3261 - Session Initiation Protocol (SIP)
• RFC 3265 - Session Initiation Protocol (SIP) -  Specific Event Notification
• RFC 3420 - Internet Media Type message/sipfrag
• RFC 3428 - SIP Extension for Instant Messaging
• RFC 3515 - The SIP Refer Method
• RFC 2327 - Session Description Protocol