The Bell 101 Data Set was the first commercial modem for computers, released by AT&T Corporation in 1958 for use by SAGE, and made commercially available in 1959, shortly after AT&T's Bell Labs announced their 110 baud modulation frequencies.

2023年5月19日 · 波特率（Baud Rate）指的是单位时间内传输的信号单元的个数，每个信号单元可以携带一个或多个比特（bit）信息。 波特率 通常用来描述调制解调器或其他类型的数字信号的传输速率，比如1200 波特率 意味着每秒钟传输1200个信号单元。

Early modems were devices that used audible sounds suitable for transmission over traditional telephone systems and leased lines. These generally operated at 110 or 300 bits per second (bit/s), and the connection between devices was normally manual, …

2024年7月9日 · The following table shows the most used baud rates. The left side part of the table shows speed and bit duration. The right part shows real transmission speed assuming there is no parity, 8 data bits and one stop bit.

110 baud was used by 8-level Teletypes like the ASR-33. I'm not aware where 150 Baud was used, but it is a doubling of 75 baud, commonly used (along with 60 baud) for 5-level TTYs. 300 bps was the standard for the first widely-used telephone modems in the 1960's.

2024年7月2日 · 波特率（Baud Rate）是通信领域中一个非常重要的参数，它表示每秒传输的二进制代码位数，单位是bps（位/秒）。 在串行通信系统中，如UART、SPI和I2C等，波特率通常由发送和接收设备的时钟频率以及所需的数据传输速度决定。

2024年11月2日 · 波特率（baud rate）指的是每秒钟传输的比特数。 以波特率115200为例，它表示每秒可以传输115200个bit。 在串行通信中，每个字节（byte）由8个比特组成，因此一个字节的传输时间为8个比特的传输时间之和。

2023年9月23日 · 波特率的计算公式为：波特率（Baud Rate）= 传输的比特数/秒数。 比如，一秒钟内可以传输100比特，那么波特率就是100 bps（比特每秒）。 最常用的波特率是多少？

2023年9月22日 · The first modems I ever worked with were 110 baud, but the Bell 103 modem set the mainstream speed ball rolling with a 300 baud FSK setup. This was the best which could reliably be achieved at the time over the phone lines of the day, given the state of the art analog tone generators and detectors.

2010年7月12日 · The 110 baud comes from the old acoustic coupler modem But there are not common baudrates like MIDI with a baud rate of 31250. The max baud rate of the most serial ports and usb to serial ports is 115200.