Voice IP-phone systems
One of the most exciting communication technology developments is currently Voice over IP (VoIP). By providing much less expensive calls to just any point in the world, it gives consumers one of the best and most cost effective methods of communication. Very often consumers who have used these systems once will stay with them indefinitely. For one of our projects we developed VoIP software that was completely integrated with Microsoft Live Communications Server and provided IM and VoIP services for users.

Calls can be to anywhere and are not inhibited by either party’s firewall or network translator. This solution is completely customizable and will fit all needs of end users. For control of calls and IM message delivery the system works using SIP (Session Initiation Protocol), and is the most reliable protocol ever used for VoIP. VoIP System developed by us allows making calls with any architecture type. Main features of our systems are:
- Works through any firewall and NAT’s
- Fully integrated with Microsoft Life Communication Server
- Uses SIP protocol (Session Initiation Protocol)
- Advanced sound processing features
- Highly productive server side
- Sound stream re-sampling and stream mixing
- Application of 3D effects
- Sound buffering for permanent and stable playback
- Sound packet size calculation depending on network speed and load
- General sound stream transformation: channel count changing, transformation between 8, 16, 32 bits per sample streams, u-law and a-law stream transformations
- Tunnel mechanism of data transmission to solve problems with address translations and firewalls which “close” necessary ports.