[Code] SIP Code

SIP Server : 192.168.50.100
A (88888) — call — B (99999)

#define FROM "From:<sip:88888@192.168.50.100:5060>"
#define TO   "To:<sip:99999@192.168.50.100:5060>"

#define REQUEST_URI "sip:99999@192.168.50.100:5060"
#define OUTGOING_CONTACT "Contact: <sip:88888@192.168.50.100:5060>"
#define INCOMING_CONTACT "Contact: <sip:99999@192.168.50.100:5060>"

Reference:

• PJSIP