800 MHZ INTERNATIONAL DUPLEXER USED IN TELECOMMUNICATIONS WHERE COMMUNICATION TAKES PLACE SIMULTANEOUSLY BETWEEN THE SENDER AND THE RECEIVER. THE SYSTEM INCLUDES TRANSMIT AND RECEIVE DUPLEXER AND TRANSMIT POWER MONITOR.

GIR 1 TERMS OF HEADING 8517 INCLUDES TELECOMMUNICATIONS APPARATUS FOR CARRIER CURRENT LINE SYSTEMS OR FOR DIGITAL LINE SYSTEMS. GIR 6 TERMS OF ONE DASH SUBHEADING 8517.50 OTHER APPARATUS, FOR CARRIER CURRENT LINE SYSTEMS OR FOR DIGITAL LINE SYSTEMS: CN CODE 851750.10 FOR CARRIER CURRENT LINE SYSTEMS.