IP Phone C56
SIP 2.0 (RFC3261) and Correlative RFCs
2x SIP Support
SRTP Support
Two interfaces 10/100 BaseT with support for bridge
4 One Touch Key , 4 Soft Menu Button
Segment LCD Display
Voice Codecs: G.711a / u, G.723.1 high / low, G.729a / b, G.722, G.726