Freeware: Rtcp

ManageEngine VQManager 5.2ManageEngine VQManager is a powerful, web-based VoIP monitoring software that aids in troubleshooting VoIP calls for failures and quality deterioration. It monitors devices that support SIP (RFC 3261) and RTP/Rtcp (RFC 3550).

P2P VoIp 1.1The program is used for conversation in a local network. The voice packages are transmitted in a format GSM6.10. Voice packages and service information use one and the same UDP port. The program is distributed with the source code.