外線 (ngoi6 sin3) — exterior lines; outside (telephone) connections in Cantonese
ngoiˍ₆外sin˗₃線简 外线
Mandarin Pinyin: wai4 xian4
Meaning of 外線
nounexterior lines; outside (telephone) connections
nounnoun; external or exterior line; outside connections, normal for phone dialing out