Blog Archives for category SIP

Difference between SIP REFER and (RE)INVITE

What is this and when it is used? When I started working in SIP environment, it was confusing to me,… Continue reading »

SIP Tutorial Part 3 – Commands

INVITE :Invites a user to a call ACK : Acknowledgement of the request. BYE :Terminates a connection between users CANCEL… Continue reading »

SIP Tutorial Part 2– Components

SIP elements are as below User Agent: The user agent resides in every SIP end station. It acts in two… Continue reading »

SIP Tutorial for beginners – Part I

SIP (Session Initiation Protocol) is a signalling protocol used to create, manage and terminate sessions in an IP based network. … Continue reading »