This protocol can be used between two low bit rate multimedia terminals, or between a low bit rate multimedia terminal and a multipoint controlunit or an interworking adapter.
The safety switch box is further provided with a contact terminal standardization mark for control and fixation, and an external winding displacement electrical-connection unit can be reserved.
该安全开关箱进一步设有控制、固定用的接点端子规格化标示，且可预留外接排线电连结单元。
3
As the fundamental controlunit of feeder automation, the feeder terminal unit (FTU) plays an important role in realizing the feeder automation and distribution automation.