US Customs Ruling (CROSS)
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Issuing Country : UNITED STATES
Date Of Issue : 2019-02-06T00:00:00
telecommunication networking equipments
Twin 850MHz In-Band Combiner, Twin Diplexer, Interference Mitigation Filter
low-loss (or same band) combiner, or LLC; multi-band combiner, or MBC; Interference Mitigation Filter (IMF)
The tariff classification of telecommunication networking equipment from China.
There are three items concerned. The first item is referred to as a Twin 850MHz In-Band Combiner- Model TD-850B-LTE78-43. This item is a low-loss (or same band) combiner, or LLC. An LLC allows for the sharing of telecommuication tower space and/or upgrading of the network to increase coverage and capacity while reducing the number of antennas and associated components on the tower. An LLC connects base stations working in the same frequency bands onto a shared feeder. This in turn reduces the tower load and helps to avoid difficult installations. This allows for an easier path for technology migration.
The second item is referred to as a Twin Diplexer PCS/AWS+WCS, Model CBC1923T-43. This item is considered a multi-band combiner, or MBC. This is an optional part in a wireless network, and helps to optimize physical deployment, with fewer long cables and less loading on the tower. The diplexer connects base stations working in different frequency bands onto a shared feeder. Shared feeders reduce tower load and avoid difficult installations. In telecommunications, multiplexing (sometimes contracted to muxing) is a method by which multiple analog or digital signals are combined into one signal over a shared medium. The aim is to share a scarce resource.
The third item is referred to as an AWS Interference Mitigation Filter, Model IMFT-AWSBAS-43. The Interference Mitigation Filter (IMF) is an optional part in a wireless network to help improve the quality of the received or transmitted signal by blocking unwanted (noisy) portions of the frequency spectrum. The IMF can address performance issues caused by interference of co-located systems. The IMF can also be tailored for specific filtering applications and requirements. An IMF can reject out-of-band interference from co-located or adjacent transmitters, and be used to address interference from other type of services, i.e. TV transmitters, public safety systems, etc.
Description : telecommunication networking equipment
Please importantly note that only the relevant portion of the related US Ruling (Cross) is displayed above. You may refer to the said customs ruling for the entire ruling explanation.
Source : US Customs Ruling (CROSS)
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