Hi
I have good experience in VOIP based apps Development . I have developed 3 VOIP based apps please check my work sample at [login to view URL]://www.freelancer.in/u/NZTSolution.html.
I know very well VOIP (SIP/RTP) .I show you VOIP apps as a demo .
The VoIP for service offers a huge range of benefits including
Click to call
Home working
Flexible call routing
Colleagues on-line
Active Directory
Hosted service with full resilience and 24-hour system management
Cost reductions through a minimal capex investment and low cost of ownership
Make calls over the internet at dramatically reduced rates.
Wide range of PBX features including caller display, call waiting, call transfer, voicemail, last number redial and three-way calling
PC Client software providing on-screen multimedia phone capability, including desktop video-conferencing, presence, instant file transfer and web push.
Variety of call management options including call routing, call screening and call logging
A VoIP telephone number that travels with you wherever you go, with your account accessible via any web browser worldwide.
Thanks
Shashikant