Crossword Puzzle Tracks connection

Clue: Tracks connection

Makes a marketing connection (TIESIN with 6 letters)
Doorman connections (INS with 3 letters)
Plug connection (CORD with 4 letters)
Trailer's connection to a car (HITCH with 5 letters)
Connection between bump and log (ONA with 3 letters)
Computer-network connection (INTERFACE with 9 letters)
Change devices that divert trains to different tracks? (SWITCHSHUNTS with 12 letters)
Some broadband connections (DSLS with 4 letters)
Makes tracks (e.g. BEATSIT with 7 letters)
Ar-tee connection (ESS with 3 letters)