phone line

NOUN
10 LETTERS · STARTS WITH P

phone line is a valid 10-letter word worth 14 points in Scrabble and 17 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
P3H4O1N1E1L1I1N1E1
3 + 4 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 =14 PTS
DOUBLE WORD → 28TRIPLE WORD → 42
MEANING

What does phone line mean?