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ETSI EN 300 166
- Transmission and Multiplexing (TM); Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2 048 kbit/s - based plesiochronous or synchronous digital hierarchies
- standard by European Telecommunications Standards Institute, 09/01/2001
- Publisher: ETSI
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Update of the specification of the physical & electrical characteristics of 64, 2048 8448, 34368, 139264, 155520 kbit/s traffic interfaces & 2048 kHz synchronisation interface.