A.PON technology data downlink uses broadcast

B.PON technology downlink adopted wavelength is 1310nm.

C.PON technology uplink adopted wavelength is 1490nm

D.PON technology data uplink uses broadcast

A.Do not allow jerk, emergency stop, flashing, etc.

B.Allowing jerk, emergency stop, flashing, etc.

C.Allowing jerk, emergency stop, flashing, etc. in the case of power assurance

A.It is forbidden to enter the lower part of working at height and hoisting.

B.You can enter the lower part of working at height and hoisting. You need to bring PPE.

C.In the case of safety reminder, on the basis of PPE, you can enter the lower part of working at height and hoisting.

A.True

B.False

A.Anti-skid shoes

B.Safety helmet

C.Whole body safety protection rope

D.Non-slip gloves