SIP Messages and Response codes
Posted by on 09 December 2011 01:45 AM
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The Session Initiation Protocol (SIP) is a text based protocol used by ESI Hosted Services to manage call flows and provide telephony service over the internet. SIP is an RFC2833 text message standard; SIP messaging is structured in the format of messages from servers and responses from clients. There are several basic message types used for controlling calls: These messages are one-half of the client-server communication format of SIP messages. There are also response codes sent as replies to the messages; here is a general outline of SIP response codes:
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