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    • 33. 发明授权
    • E1/T1 to asynchronous communications interface
    • E1 / T1到异步通信接口
    • US06751685B2
    • 2004-06-15
    • US09837520
    • 2001-04-18
    • William Smith
    • William Smith
    • G06F300
    • H04J3/1635H04J3/08
    • The present invention is primarily directed to rail car communication system and in particular communication system used to transfer data and voice communications from one car to another. The present invention has particular applicability for use in subway cars. A communication system using an E1 protocol is provided with an interface device which translates data received from a hardware device having, inter alia, a microprocessor and a universal asynchronous receiver transmitter (UART) used for serial communications such as COM 1-4. The asynchronous UART data is interfaced with the E1 channel. UART data transfers are usually done on a byte (8 bits) by byte basis but the present invention uses E1 timing and bit by bit communications. Additionally, data is normally sent at the data rate of the E1 channel not some other unrelated speed such as those used by a UART during serial communications. Also, the data is usually sent synchronously, like the E1 channel, not asynchronously, as with a UART.
    • 本发明主要涉及轨道车辆通信系统,特别是用于将数据和语音通信从一个车辆传送到另一个车辆的通信系统。 本发明特别适用于地铁车辆。 使用E1协议的通信系统提供有一个接口设备,该接口设备转换从具有微处理器的硬件设备接收的数据,以及用于诸如COM 1-4的串行通信的通用异步接收机发送器(UART)。 异步UART数据与E1通道接口。 UART数据传输通常以字节(8位)为单位进行,但是本发明使用E1定时和逐位通信。 另外,数据通常以E1通道的数据速率发送,而不是一些其他无关的速度,如串行通信期间由UART使用的速度。 而且,与UART一样,数据通常与E1通道同步发送,不是异步地发送。