Nokia MetroSite Maintenance Manual page 36

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Note
If the cables have not been labelled, make a note of which cable is TX and which
cable is RX before disconnecting them.
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Block the BCF locally from Nokia BTS Manager or request a BCF lock
from the BSC.
Switch the BTS power supply unit to the stand-by position.
Disconnect the transmission unit cabling.
Open the upper and lower retaining screws of the unit with a T10 Torx
driver. Loosen the screw enough to remove the unit, but leave them
engaged in the threads to allow easy refitting.
Remove the transmission unit. Pull the unit out from the front until the unit
comes to a stop, then pull the unit out from the side. See Figure 7.
Unpack the new transmission unit.
Insert the new transmission unit to the unit slot from the side of the cabinet.
Push the unit towards the backplane. Do not use excessive force!
Tighten the upper and lower retaining screws to 1.5 Nm (1.11 lb ft) with a
T10 Torx driver.
Reconnect the unit's cabling.
Switch the BTS power supply unit to the ON position.
If the transmission unit is an FXC E1 or FXC E1/T1, refer to the procedure
below for importing the saved cross-connection information.
With Nokia BTS Manager, right-click the BCF object in the Equipment
View window and carry out a BCF Object Reset, or, if locked from the
BSC/NMS, request an unlock from the BSC/NMS (the BCF reset is
automatic in this case).
Request the BSC/NMS to run the Abis loop test.
Draft
Maintenance
DN9913495
Issue 3-0 en