Action URI to hangup call on T3x V70

[CWR]

Here is what I have working on 38.70.0.143:

key=X is used to END THE CALL

Here are some others in case someone needs them...
key=OK / answer
key=SPEAKER / speakerphone
key=F_TRANSFER
key=VOLUME_UP
key=VOLUME_DOWN
key=MUTE
key=F_HOLD
key=MSG / message button
key=RD / redial
key=DNDOn
key=DNDOff

There are several more dealing with the dedicated and soft keys.