抢线 meaning in English

ruthless pre-emption

18th , has is called to snatch the line function , when with the household number in nobody , some people infiltrates the telephone attempt from outside to occupy reports to the police the line to commit a theft , robs when the police occurs , the system can automatically snatch the line digit dialing to report to the police
18有被叫抢线功能，当用户家中无人，有人从外面打入电话企图占住报警线路行窃，盗警发生时，系统会自动抢线拨号报警。