suppose in config file there is a entry like 
localuser name=me
ip=36.212.176.90
port=5060
remote name=you
ip=36.212.176.92
port=5060
transport=udp

[download]
Then it will create the INVITE line as 
INVITE sip:you@36.212.176.90 SIP/2.0
Via:SIP/2.0/UDP me@36.212.176.92:5060
From: sam<sip:me@36.212.176.92>
To: you<sip:you@36.212.176.90>

[download]

Code tags added by GrandFather

Edit: added code tags (again!) - davorg

In reply to Read the config file and create the INVITE line as per config file by samirpatry

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