Correct
外线
/ wàixiàn /
Strokes
Definition
(military) line of troops encircling an enemy position/(telephony) outside line/(basketball) outside the three-point line
Example
As a Noun
exterior lines
1
Wàixiàn
外线
zuòzhàn
作战
fight on exterior lines
As a Noun
outside (telephone) connections; outside line
2
Ràng
让
jiēxiànyuán
接线员
jiē
接
wàixiàn
外线
ask the switcthboard operator for an outside line