Labels:text | screenshot | font | line | diagram | parallel OCR: " .... > Voice cal established Voice call request and response Session Initiation Protocol (SIP} server Internet Calle- Recipient Figure 2. Session Initiation Protocol (SIP) speeds up call setup by bundling all of the configuration information in the initial request. The request is either sent directly or via the proxy server to the recipient, who accepts the call and immediately initiates the session.
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