understood

Session Initiation Protocol :SIP Application layer protocal

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The Session Initiation Protocol (SIP) is a signaling communications protocol, widely used for controlling multimedia communication sessions such as voice and video calls over Internet Protocol (IP) networks. The protocol defines the messages that are sent between endpoints which govern establishment, termination and other essential elements of a call. SIP can be used for creating, … Read more

SIP error code

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SIP error code Code Meaning 1xx Informational — request received, continuing to process the request 2xx Success — the action was successfully received, understood, and accepted 3xx Redirection — further action needs to be taken in order to complete the request 4xx Client Error — the request contains bad syntax or cannot be fulfilled at … Read more