IP Multimedia Subsystem (IMS) – detailed part2

This is a folow up on my previous post on IMS which described what is IMS and why it came into existing. Also how IMA can benifits with its rich feature set and huge OPEX savings. To read the previous post click here . This post described IMS architecture and core concepts in detail. IMS … Continue reading IP Multimedia Subsystem (IMS) – detailed part2

VPN ( Virtual Public Network ) over SIP

VOIP across an SSL-based VPN is achieved in good quality by encapsulating the UDP VOIP packets ( SIP and RTP ) in TCP/IP . Data used for defining a VPN like its Groups, its Members and the associated profiles is organized hierarchically.It includes information like who is the operator, subscriber of VPN, group ID and member ID.