: Uses bit-by-bit interleaving . To account for slight timing differences, it employs "bit stuffing," where extra bits are added to align signals.
: Operates on two primary regional standards: the European E-carrier (30 channels) and the North American/Japanese T-carrier (24 channels). Limitations : : Uses bit-by-bit interleaving
Digital multiplexing systems are the backbone of telecommunications, used to combine multiple low-speed data streams into a single high-speed link. The transition from to Synchronous Digital Hierarchy (SDH) represented a major evolution in network efficiency and standardization. Plesiochronous Digital Hierarchy (PDH) it employs "bit stuffing
: Regional differences (E-carrier vs. T-carrier) make it difficult to interconnect systems from different countries or vendors. : Uses bit-by-bit interleaving