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    • 5. 发明授权
    • Telecommunication device operating under an enhanced TDD protocol
    • 在增强型TDD协议下运行的电信设备
    • US5517548A
    • 1996-05-14
    • US155061
    • 1993-11-19
    • Robert M. EngelkeKevin ColwellRonald W. SchultzJeffrey HilliardTroy Vitek
    • Robert M. EngelkeKevin ColwellRonald W. SchultzJeffrey HilliardTroy Vitek
    • H04M1/247H04M11/00
    • H04M11/00H04M1/2475
    • A telecommunication device for the deaf is designed to operate under an enhanced TDD communication protocol. The TDD is capable of communicating with conventional TDDs operating under normal Baudot/Weitbrecht communications, but is also capable of communicating with a similarly enhanced TDD utilizing an enhanced protocol with a faster data transfer rate. The enhanced TDD is capable of signaling to another remote TDD through the use of a synchronization character that it is capable of enhanced TDD communications. If a similar synchronization character is received from the remote station, both TDDs can then switch to enhanced TDD communication with its advantages of speed and enlarged character set. The synchronization character is especially designed so as not to interfere with the operation of a conventional TDD which might receive the character and also to be sufficiently distinctive so as to be capable of definite reception by enhanced TDD machines with minimum error.
    • 用于聋人的电信设备被设计为在增强的TDD通信协议下操作。 TDD能够与在正常的Baudot / Weitbrecht通信下操作的常规TDD进行通信,但是也能够利用具有更快的数据传输速率的增强协议与类似增强的TDD进行通信。 增强型TDD能够通过使用能够增强TDD通信的同步字符来向另一个远程TDD发信号。 如果从远程站接收到类似的同步字符,则TDD可以利用其速度和放大字符集的优点来切换到增强的TDD通信。 同步特性被设计成不干扰可能接收字符的传统TDD的操作,并且还具有足够的区别性,以便能够以最小误差的增强型TDD机进行确定的接收。