+E1 is a widely used digital transmission format, a fundamental building block in [telecommunication networks](/wiki/Telecommunication_Network). It structures the flow of [voice](/wiki/Voice) and data, enabling high-speed communication across vast distances.
+## See also
+- [T1](/wiki/T1)
+- [Multiplexing](/wiki/Multiplexing)
+- [PCM](/wiki/PCM)
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