Wireless_Internet_telephony:
INTRODUCTION
Internet Telephony can be defined as real time voice or mult-imedia communication over the internet or more generally over packet switched network. two telecommunication standardizations bodies are now used IP (session initiation protocol ) as basis to make wireless Internet telephony a reality in the context of third generation wireless telecom- munication network.Millions of highly mobile end-user who are frequently change their location will access Internet telephony services using wide.
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