10 
Coiling up fibers in the fiber management tray 
c 
Coiling method for fibers without attenuators (the optical 
interface board and the cross-connect and clock board are 
installed on the same side) 
Coiling method for fibers without attenuators (the optical 
interface board and the cross-connect and clock board are 
installed on different sides) 
Coiling method for fibers with attenuators (the optical 
interface board and the cross-connect and clock board 
are installed on the same side) 
Coiling method for fibers with attenuators (the optical 
interface board and the cross-connect and clock board 
are installed on different sides) 
Variable attenuator Variable attenuator 
3 
Installing Fiber Management Trays 
Mounting ear 
Fiber hole 
Fiber 
management 
tray 
Exterior 
a 
Mounting holes 
b 
a 
a 
Mounting holes to attach mounting 
ears on the N63E cabinet