5588 INVITE sip:<To> SIP/2.0
Via: SIP/2.0/UDP <From-Address>:<Local-Port>;branch=z9hG4bK00003609
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To: Receiver <sip:<To>>
Call-ID: <Call-ID>@<From-Address>
CSeq: <CSeq> INVITE
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To: Receiver <sip:<To>>
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CSeq: <CSeq> <Teardown-Method>
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