Key Specifications/Special Features:

• Digital support
• Store incoming call number with phone book
• Supports speaker mode
• Stand-by time extends to 120 hours
• Can receive the call from common telephone
• Can freely receive/make a call within 30 to 100 meters
• Supports SIP (RFC3261, RFC2543)
• Voice codec: G711A/u, G729, G723
• G.168 echo cancellation standard, compliant 96ms echo cancellation with speaker mode
• Supports gain setting, jitter buffer, VAD, CNG call displace and point-to point call
• Supports using RTP and RTCP
• Supports DTMF transmission mode: SIP info, DTMF relay, RFC2833
• Many countries' standard ring
• NAT transversal: supports STUN, CITRON, AVS mode
• Supports SIP domain, SIP authentication (none, basic, MD5), domain name parse
• Supports two SIP server synchronously, including pubic server/private server, can make a call by either proxy

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