TLJ

 Definition of SIP 1. SIP (Session initiation Protocol) is a signaling protocol at the application layer that functions to build, modify, and terminate a multimedia session that involves one or several users 2.SIP function A.Call initiation 1.Build a communication session 2. Media transfer protocol negotiations 3 Invite another user agent to join the communication session B.Callmodification C.Call Termination 3. SIP address Each SIP Component has a SIP address.  The SIP address format is [sip:]<username@ host> example: a.sip:susan@voiprakyat.or.id b.901@voiprakyat.or.id 4.Server softswitch A softswitch is a device capable of connecting a circuit network with a packet network, including the fixed telephone network {PST} 5.Communication with SIP This is done by sending HTTP-based messages.  each user has an address expressed with a SIP-URI. a.request [sent from client to server] contains the operation requested by the client b.response [sent from server to client] con...