ERBIUM DOPED OPTICAL FIBRE AMPLIFIER USED IN LONG HAUL DIGITAL TELECOMMUNICATIONS SYSTEMS, DESIGNED TO EXTEND THE RANGE OF A TELECOMMUNICATION SIGNAL TRANSMITTED VIA OPTICAL FIBRE CABLE. IT IS IN THE FORM OF A PRINTED CIRCUIT BOARD ASSEMBLY THAT IS PLUGGED INTO EITHER A SINGLE 7 FOOT BAY OR AN 11 FOOT HIGH BY 23 INCH WIDE OC- 48 NETWORK BAY.THE MODULE COMPONENTS INCLUDE PUMP LASER AND AN ERBIUM DOPED FIBRE.

GIR 1 TERMS OF HEADING 8517 INCLUDES TELECOMUNICATION APPARATUS FOR CARRIER-CURRENT LINE SYSTEMS OR DIGITAL LINE SYSTEMS. GIR 6 TERMS OF ONE DASH SUBHEADING 851750, OTHER APPARATUS FOR CARRIER-CURRENT LINE SYSTEMS OR DIGITAL LINE SYSTEMS. CN CODE 85175010 FOR CARRIER-CURRENT LINE SYSTEMS.