针对系统规模大、现场设备多、运行方式变化复杂的特点，将部分功能下移到远动终端装置（RTU）、馈线终端装置（FTU），从而减轻主站的负担。

For large system with more devices and operation patterns, part of the functions is implemented in RTU(Remote Terminal Unit) and FTU(Feeder Terminal Unit) to mitigate the load of main station.

youdao

为什么要尝试挤压像楼梯道一般的比较阴暗的角落，而这只是为了解决上下移动这个功能却遗留了像是移动大规格家具而产生的那些问题？

Why trying squeeze a stair to some death corner just for the function of moving up and down only while leaving all other issues such as moving up an oversize furniture ?

youdao

老的功能“下移”，甚至成了操作系统的一部分。

Old functionality moves "down" and may even become part of the operating system.

youdao