DTMF 코덱/SK Combo 모뎀 모듈 -CMX865A

(DTMF CLICK)

   

개요

  • 본 제품은 DTMF 코덱/SK Combo 모뎀 모듈 -CMX865A입니다.
  • DTMF Codec/FSK Combo 모뎀 CMX865A 칩을 탑재하고 있는 제품입니다.
  • DTMF를 인코딩 디코딩하고 FSK 데이터 전송(V.23, V.21, Bell 103, and Bell 202 standards)을 지원하여 다양한 전화기 어플리케이션에 사용이 가능합니다.

특징

  • DTMF Click is a compact add-on board designed for projects that demand reliable telephony interactions. This board features the CMX865A, a DTMF Codec/FSK Combo multi-standard modem from CML Micro. The CMX865A excels in encoding and decoding DTMF signals, alongside supporting FSK data transmission compatible with V.23, V.21, Bell 103, and Bell 202 standards, making it versatile for various telephony applications. It's particularly adept at enabling dual-mode operations for transmitting and receiving data, ensuring high fidelity in signal processing and resistance to voice falsing. Ideal for security systems, automated response services, and IoT devices requiring telephonic interaction, DTMF Click provides a solution for developers looking to incorporate reliable telecommunication capabilities.
  • NOTE: To ensure the DTMF Click board™ meets global telecom isolation standards, it is essential to implement appropriate isolation measures. Using any SPI Isolator Click board™ is advisable to enhance the safety and reliability of your project and should be positioned between the line side of the DTMF Click and the system in use. These precautions help comply with international telecom standards, which may require isolation up to 6500V in some countries.
    Warning: Telecom isolation requirements vary significantly across different countries. Always consult the telecom regulations specific to your country before connecting to the line. The users are responsible for ensuring compliance with local telecom standards and regulations.

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  • HOW DOES IT WORK?

    DTMF Click is based on the CMX865A, a high-performance DTMF Codec/FSK Combo multi-standard modem from CML Micro. This Click board™ stands out for its integration of both an industrial standard DTMF encoder/decoder and a versatile FSK modem, catering to a variety of telephone connectivity and interconnect applications. The CMX865A's ability to handle basic call setups and progress functionalities, coupled with its capacity for data signaling, makes it suitable for remote control, status notification, and data acquisition across numerous fields.

    dtmf click inner img

    As mentioned, the CMX865A combines a high-quality DTMF decoder known for its resistance to voice falsing and a multifaceted FSK modem that supports standards like V.23, V.21, Bell 103, and Bell 202. Users benefit from its dual operational modes, which are programmable for transmission and reception, allowing for the transmission of programmed signals, simple melodies, or modem tones. Its applicability extends to security systems that rely on DTMF for access control, automated response services for customer interaction, and IoT devices requiring remote control over telephony networks. Additionally, its on-chip line driver, hybrid, and receiver circuits, complemented by external components and a P1200 transformer, offer a complete, fully isolated line interface solution.

    Data and control exchanges between the CMX865A and the host MCU are made through a C-BUS interface, compatible with a standard 4-wire SPI interface of the mikroBUS™ socket. The board also uses the mikroBUS™ socket's RDN pin and a red RING LED to indicate ringing signals and the IRQ pin for interrupt requests related to call states like busy, dialing, and connected statuses. The HSW pin, alongside a blue HOOK LED, also serves as a hookswitch to manage the line interface's connectivity status (0-OFF, 1-ON). An additional feature of the CMX865A is the Powersave mode, which conserves energy by deactivating all circuits except the essential C-BUS (SPI) interface.

    This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, it comes equipped with a library containing functions and an example code that can be used as a reference for further development.

    SPECIFICATIONS

    Type Signal Processing
    Applications Ideal for security systems, automated response services, and IoT devices requiring telephonic interaction
    On-board modules CMX865A - DTMF Codec/FSK Combo multi-standard modem from CML Micro
    Key Features High-quality telephony communication, DTMF encoding/decoding and FSK data transmission, multi-standard FSK compatibility, resistance to voice falsing and noise interference, dual-mode operation, low power consumption, and more
    Interface SPI
    ClickID Yes
    Compatibility mikroBUS™
    Click board size L (57.15 x 25.4 mm)
    Input Voltage 3.3V

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