CMX866 V.22 Bis Modem With AT Commands

Description: The CMX867A is a multi-standard modem designed for telephone-based information and telemetry systems. Control of the device is managed through a high-speed serial bus that is compatible with various types of C serial interfaces. The data transmitted and received by the modem is also communicated over this same serial bus. The modem features on-chip programmable Tx and Rx USARTs that comply with V.14 standards, supporting asynchronous data while allowing the transmission and reception of unformatted synchronous data as 8-bit words. Additionally, it includes a high-quality DTMF decoder with robust immunity against false triggering during voice signals, along with a standard DTMF encoder. These components can alternatively be utilized to transmit and detect user-specific programmed single and dual-tone signals, call progress signals, or modem calling and answering tones, as provided by Consumer Microcircuits Limited.

The CMX867A modem serves as a versatile solution for integrating communication capabilities into various systems. Its architecture is designed to facilitate seamless interaction with telephone networks, making it suitable for applications ranging from telemetry to automated information retrieval. The high-speed serial bus not only simplifies control but also enhances data throughput, ensuring efficient communication between the modem and host systems.

The inclusion of programmable Tx and Rx USARTs allows for flexibility in data handling, accommodating both asynchronous and synchronous communication protocols. This adaptability is crucial for applications requiring diverse data formats, enabling the modem to interface effectively with different types of data sources and sinks.

The DTMF (Dual-Tone Multi-Frequency) capabilities of the CMX867A are particularly noteworthy. The high-quality DTMF decoder is engineered to minimize false detections, which is essential in voice-activated systems where accuracy is paramount. The standard DTMF encoder complements this functionality, enabling the generation of DTMF tones for various signaling purposes. Furthermore, the ability to program custom tones adds an additional layer of functionality, allowing developers to tailor the modem's responses to specific operational requirements.

Overall, the CMX867A modem is a robust component for telecommunications applications, offering advanced features that cater to the demands of modern information systems while maintaining compatibility with established communication standards.The CMX867A is a multi-standard modem for use in telephone based information and telemetry systems. Control of the device is via a simple high speed serial bus, compatible with most types of C serial Interface The data transmitted and received by the modem is also transferred over the same serial bus. On-chip programmable Tx and Rx USARTs meeting the requirements of V. 14 are provided for use with asynchronous data and allow unformatted synchronous data to be received or transmitted as 8-bit words. A high-quality DTMF decoder with excellent immunity to falsing on voice and a standard DTMF encoder are included.

Alternatively, these blocks CAN be used to transmit and detect user-specific, programmed single and dual-tone signals, call progress signals or modem calling and answering Tones By Consumer Microcircuits Limited