GE 202 MODEM

Ge 202 modems
Ge PRG modem is a product of general electric and is a modem module commonly used in industrial automation and telematics systems for remote monitoring, control and data communication. The functions of these modules include: telematics: the GE prg-modem module is used to establish and maintain communication links with remote equipment and control centers to monitor and control remote equipment. Data transmission: it can transmit various data types, including real-time process data, control commands, alarms and event records.

Bell 202 modem is a classic and representative low-speed data communication equipment, which originated from the FSK (frequency shift keying) modulation standard formulated by Bell Labs in the 1970s. Its core specification defines the full duplex asynchronous data transmission mechanism at 300 baud rate: the sender uses 1200 Hz frequency to represent logic "1" and 2200 Hz to represent logic "0"; The receiver demodulates through analog signal processing technologies such as band-pass filtering and zero crossing detection.

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Bell202调制解调器是一种经典且极具代表性的低速数据通信设备，起源于20世纪70年代由美国贝尔实验室（Bell Labs）制定的FSK（频移键控）调制标准，其核心规范定义了300波特率下的全双工异步数据传输机制：发送端使用1200Hz频率表示逻辑“1”，2200Hz表示逻辑“0”；接收端则通过带通滤波与过零检测等模拟信号处理技术完成解调。

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