DGP306 VoIP Phone series is SIP 2.0 ( RFC3261 )  compliant.It is
feature-rich, toll-quality, cost-effective and standard-compliantVoIP
Phone that can be  easily  plugged  to  networkCat.5 cable directly
from ADSL router or switch at your home or office. DGP306  series
are compatible with most VoIP service providers and it operateslike
a regular telephone. With a VoIP Phone service or connect toVoIP
Gateway Router in office,  this VoIP Phone enables significantcost
savings when making international or long distance phone calls.