if we look at some of your other dreams, in relation to this one, it appears
that rescuing others is something you have an interest in. whatever unknown
actions you might take may serve the purpose of providing a lifeline to
endangered people/animals.
in that dream with the phone call, where there was no one on the line, you'd
heard various sirens of emergency vehicles passing nearby... indicating that
this is the time when people are endangered. i'd suggested that the
message of that dream was for you to stay safely away from the danger.
however, it seems against your nature to hide away indoors -- your dreams
are usually involving traveling, and usually in 'communal' conveyances
(with ordinary folk), so you may feel drawn to enter into the 'danger zone'
and render some assistance (for which you've received no worldly marching
orders, meaning you'll want to recall what "mission" you've given yourself
before incarnating).
Kenny Loggins - Danger Zone
https://www.youtube.com/watch?v=yK0P1Bk8Cx4