Flow-status AVP

The Flow-status AVP (511) is based on SDP direction. Tests for SDP are performed in the following order:

SDP State	Flow-Status AVP (511) Set to
port in the SDP m-line is 0	REMOVED (4)
Transport in m-line is "TCP" or " TCP/MSRP"	ENABLED (2)
a=recvonly and <SDP direction> = UE originated	ENABLED-DOWNLINK (1)
a=recvonly and <SDP direction> = UE terminated	ENABLED-UPLINK (0)
a=sendonly and <SDP direction> = UE originated	ENABLED-UPLINK (0)
a=sendonly and <SDP direction> = UE terminated	ENABLED-DOWNLINK (1)
a=inactive	DISABLED (3)
a=sendrecv or no direction attribute	ENABLED (2)

UE originated - Call originator creates the SDP being considered.

UE terminated - Call terminator creates the SDP being considered.

Flow-status AVP is always created according and requires no configuration.