Information for ruling 600012077
This section is Advance Tariff Ruling
- Start date
- 12 Jan 2025
- Expiry date
- 11 Jan 2028
- Commodity code
- 8543709099 (opens in new tab)
- Description
- Redundancy switching systems that are designed for maximum reliability in satellite communications systems by ensuring service continuity. The primary feature of a redundancy system is the automatic switchover mechanism. These systems are designed to recognise if a unit fails (for example power or signal failure) then a backup automatically takes over, preventing disruption. Redundant systems also allow for routine maintenance and repair work to be carried out without the normally associated down-time. Low noise amplifiers and frequency converters (block up and down) are essential components used for signal reception and transmission within a satellite telecommunications system. A redundant switch system is designed to safeguard these components by ensuring continuous operation in case of failure. The key element in a redundancy switching system is a rack mounted, remote controller with a user interface. The controller continually monitors the performance of the units, detecting faults and automatically sending a control signal to trigger the switching mechanism if required. The indoor controller is connected to an outside switchover unit which is responsible for physically redirecting the RF signal to the backup unit. In a 2 to 1 redundant LNA system, 3 low noise amplifiers and a redundancy switch are fitted together on an outdoor plate assembly that is fitted to the antenna hub. The plate is controlled by an indoor control panel through interconnecting control cable. In a redundant block down or block up converter system, a similar approach is taken. An indoor redundancy controller controls an outdoor switch box. In an N+1 configuration, there are several primary units (e.g., multiple LNAs, BDCs, or BUCs), and one backup unit. If any primary unit fails, the backup unit can replace the failed component.
- Keywords
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- CONVERTERS
- FOR TRANSMISSION OF SIGNALS
- AMPLIFIERS
- FOR TRANSMISSION VIA SATELLITE
- SWITCHING APPARATUS
- Justification
- Classification has been determined in accordance with the following: For the purposes of determining the commodity codes within which goods most appropriately fall, reg 3 (1) of The Customs Tariff (Establishment) (EU Exit) Regulations 2020 sets out that the rules of interpretation contained in the following have effect – a. Part Two (Goods Classification Table Rules of Interpretation) of the Tariff of the United Kingdom (Reg 3(1)(a)); and b. Notes to a section or chapter of the Goods Classification Table (Reg 3(1)(b)). General interpretative rules (GIR)s: GIR 1 - has been used to classify this product by the terms of heading 8543 - Electrical machines and apparatus, having individual functions, not specified or included elsewhere in this chapter GIR 6 has been used to classify this product to subheading level 854370 - Other machines and apparatus 8 Digit Code 85437090 - Other than elsewhere specified in this heading 10 Digit code 8543709099 - Other than elsewhere specified in this subheading Also classified in accordance with: Harmonized System Explanatory Notes (HSENs) to heading 8543