[Freeswitch-users] How to add INVITE arguments?

[Srdjan Cvikic]

Hi all,

How can I add INVITE line or header arguments as mentioned in RFC4715?

INVITE tel:+17005554141;isub=12345;isub-encoding=nsap-ia5 SIP/2.0
To: <tel:+17005554141;isub=12345;isub-encoding=nsap-ia5>
From: "Bob"<sip:bob at biloxi.example.com>;tag=1928301774

TIA!