sip phone

sip phone

sip phone is a voip phone that supports SIP protocol, which is one of the voip protocol.
sip is the most popular voip protocol in the world, comparing with h.323 , iax,mgcp , sip is more and more popular.
there are many sip phone manufacturer in the world, however, welcome to consider ChinaRoby ,which is a professional sip phone manufacturer.

SIP has the following characteristics:
Transport-independent, because SIP can be used with UDP, TCP, ATM & so on. Text-based, allowing for humans to read SIP messages

you may also see more informations from the website of chinaroby about sip protocol and sip phone.