Digital Signal 1 (DS1, sometimes DS-1) is a T-carrier signaling scheme devised by Bell Labs. DS1 is a widely used standard in telecommunications in North America and Japan to transmit voice and data between devices. E1 is used in place of T1 outside North America, Japan, and South Korea. DS1 is the logical bit pattern used over a physical T1 line; however, the terms "DS1" and "T1" are often used interchangeably.
Read more about Digital Signal 1: Bandwidth, DS1 Frame Synchronization, Connectivity and Alarms, Inband T1 Versus T1 PRI, Origin of Name, Alternative Technologies, Semiconductor
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