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- Receiving datagram: This is an inbound packet received by the router.
- The Request-Line consists of the INVITE sip followed by the target number (in this case ++492405123412). The target number is primarily derived from the Request-Line.
- To: <sip:+492405123412: The Phone number in the To field is the target number.
- From: <sip:+49240598765: The phone number in the From field is the source number.
- Call-ID: p65552t1576681302m345261c335799785s2: The Call-ID is a unique identifier that you can search for in the trace to output the SIP flow.
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