Note：Replacing the TEU board will interrupt all the services that related to the TEU board.
The operation must be performed in accordance with standard antistatic procedures as the static electricity may damage the circuit board.
Wear an antistatic wrist strap and a pair of gloves; connect the grounding end of the antistatic wrist strap to the earth.
If the faulty TEU is out of service, go to step 2）.
The procedure for replacing a TEU board is as follows:
1) Obtain the site management right.
2) Change the management status of the TRX that will be interrupted while replacing the TEU board.
3) Remove the faulty TEU board from the slot.
4) Insert the new TEU board into the corresponding slot.
5) Turn on the power.
6) Change the operation and management status of the corresponding TRX.
7) Testing.
Test the BTS by performing the setup of a call.
8) Release the site management right.