outside line

connection by telephone to a place that is outside the building or organization （电话）外线.

outpouring, output, output device, outrage, outrageous, outrageously, outrank, outre, outrider, outrigger, outright, outrival, outrun, outsell, outset, outshine, outside, outside broadcast, outside lane, outside left, outside right player, outsider, outsize, outskirt, outskirts, outsmart, outspoken, outspokenly, outspokenness, outspread, outstanding, outstandingly, outstation, outstay, outstretched, outstrip, outturn, outvote, outward, outward(s), outwardly,