Telephone Answering Machine Control Microprocessor
Custom microcontroller programmed for managing call detection, message recording triggers, and playback in answering machines of heading 8521. Includes firmware tailored for answering functions. Classified in 8522.90.58 as a specialized part for these apparatus.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for memory-type integrated circuits used in storage
If the chip is primarily memory rather than control logic for answering functions.
If parts for other apparatus of heading 8521 like video recorders
Non-answering machine parts of 8521 apparatus go to broader 'other' categories.
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Import Tips & Compliance
• Submit firmware source code excerpts or functional descriptions proving answering machine control purpose
• Use HTS explanatory notes for 8522 to justify 'sole or principal use' with answering machines
Related Products under HTS 8522.90.58
Answering Machine Message Playback Circuit Board
A printed circuit board assembly with amplifier and DAC specifically for reproducing stored messages in automatic telephone answering systems. Engineered for integration into answering machines under heading 8521. Falls under 8522.90.58 as other parts of telephone answering machines.
Answering Machine Audio Transformer Module
Compact audio transformer designed for line impedance matching and signal isolation in telephone answering machine audio circuits. Optimized for the electrical characteristics of answering systems under heading 8521. Qualifies under 8522.90.58 for other answering machine parts.
DTMF Tone Decoder Chip for Answering Machines
Integrated circuit that decodes dual-tone multi-frequency signals to remotely activate message playback or recording in telephone answering machines. Specifically programmed for answering system remote access protocols. Covered by 8522.90.58 as other parts.
Answering Machine Power Supply Control Board
PCB with voltage regulators and switching circuitry tailored for low-power operation in standby mode of telephone answering machines. Includes circuits for message indicator LEDs. Fits 8522.90.58 as dedicated answering machine part.
Telephone Answering Machine Chassis Assembly
Metal/plastic enclosure specifically designed to house answering machine PCBs, tape mechanisms, and telephone line interfaces. Includes mounting points for heading 8521 apparatus components. Classified under 8522.90.58 for other parts.
Answering Machine Remote Control Receiver Module
Infrared receiver module for wireless remote operation of message playback and skip functions in telephone answering systems. Tuned to answering machine control codes. Part of 8522.90.58 other category.