专用集成电路: a lication ecific integrated circuit （asic）application specific integrated circuit asicapplication-specific integrated circuitasic application specific icasic application specific integrat
The number of telephone lines connecting the subscriber ' s terminal equipment to the public switched network and which have a dedicated port in the telephone exchange equipment 连接用户终端设备和公用交换网并具有一个电话交换设备专用端口的电话线数。
