(1)Single voice port that supports legacy (analog) touch-tone telephones
(2)Connects legacy telephones to IP-based networks
(3)Advanced pre-processing to optimize full-duplex voice compression
(4)High performance line-echo cancellation eliminates noise and echo
(5)Dynamic network monitoring to reduce jitter artifacts such as packet loss
(6)Clear, natural-sounding voice quality VoIP Specifications
(7)Radvision Sip stack version 3.0.4.0
(8)Digest Authentication MD5
(9)Record-Route Headers
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