busy signal

When was the last time you made a call and got a busy signal?  I remember growing up and my Mother or Father simply taking the phone “off the hook” so dinner time was uninterrupted.  The cord was wrapped around the door knob.  In this busy life, you might just want to try unplugging and spend some quality time.  Are you reachable 24/ 7 or do you have hours off the hook?