Analog Repeater Voice Frequency Filter Module
Module containing band-pass filters and microphone interface circuits for analog line repeaters (8518.40.10). Ensures voice signals stay within 300-3400 Hz telephony band. HTS 8518.90.41.00 as repeater part.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If general-purpose electrical filters
Filters not specifically for telephone repeaters classified as general electrical parts.
If for loudspeaker enclosures rather than repeaters
Audio filters for consumer speakers fall under different parts subheadings.
If used for oscilloscope/telecom testing
Test/measurement filters classified under instruments rather than equipment parts.
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Import Tips & Compliance
• Include filter response curves matching ITU-T telephony standards for classification support
• Declare as 'factory replacement part' with specific repeater model cross-references
• Provide proof of use in carrier long-haul analog systems vs. local audio applications
Related Products under HTS 8518.90.41.00
Line Telephone Handset Microphone Assembly
This is the microphone component assembly specifically designed for integration into line telephone handsets classified under subheading 8518.30.10. It captures voice signals for transmission over analog telephone lines and meets the technical specifications for parts of those handsets. Classified under 8518.90.41.00 as 'other' parts of line telephone handsets.
Telephone Repeater Audio Input Module
Audio input module serving as the microphone interface for analog telephone line repeaters under subheading 8518.40.10. This part amplifies and conditions weak voice signals in long-distance analog repeater stations. Falls under 8518.90.41.00 as 'other' parts specifically for those repeaters.
Analog Handset Carbon Microphone Cartridge
Replaceable carbon microphone cartridge for classic line telephone handsets (8518.30.10), containing carbon granules for voice-to-electrical signal conversion. Designed for easy insertion into handset microphone housings. Classified in 8518.90.41.00 as a part of line telephone handsets.
Line Repeater Signal Conditioning Board
Printed circuit board assembly with microphone preamplifiers for analog telephone line repeaters (8518.40.10). Conditions low-level audio pickup signals for transmission over copper lines. HTS 8518.90.41.00 as 'other' repeater parts.
Telephone Handset Acoustic Coupler Assembly
Acoustic interface assembly that mounts inside line telephone handsets (8518.30.10) to optimize microphone pickup patterns. Includes damping materials and porting for clear voice transmission. Classified under 8518.90.41.00 for handset parts.
Handset Microphone Wiring Harness
Custom wiring harness connecting microphone elements to telephone handset base in 8518.30.10 line telephones. Includes shielding for noise rejection and strain relief. Classified 8518.90.41.00 as handset part.