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PCM and Time Division Multiplexing (TDM)
Video lessons on this topic
Communication Basics #06 PCM & Time Division Multiplexing
Communication Basics #18 SDH/SONET: STM-1 Frame, ADM & The End of the Mux Mountain
Communication Basics #17 PDH: Plesiochronous Digital Hierarchy & E-Carrier
Communication Basics #21 Worked Example: Nyquist Theorem & PCM
Communication Basics #31 Worked Example: E-Carrier Selection — Voice + Video on One Backbone Link
Related lessons
Solution Notebook · EN
#06 PCM for telephony voice, synchronous TDM framing, historical E1/T1/J1 PDH hierarchies, and bit-rate calculations
Solution Notebook · EN
#17 G.704 E1 timeslots, G.702/G.742 PDH rates and tributaries, plesiochronous clocks, justification, staged access, and capacity/provisioning choices
Solution Notebook · EN
#18 G.707 STM-1 framing, AU-4 pointer and VC-4 payload area, provisioned tributary access through ADMs, exact SDH/SONET line rates, continuous ATM cell mapping, and SDH/OTN migration validation
Solution Notebook · EN
#21 separate DC and 1/4-kHz components in a composite analog signal, distinguish the 8-kHz textbook Nyquist bound from a realizable sample rate, calculate 8 bits for 256 levels and a 64-kbit/s raw PCM rate, then evaluate 5/32-kHz sampling and voice/video scope
Solution Notebook · EN
#31 calculate 3.84-Mbit/s payload for 60 G.711 channels; obtain 96-Mbit/s video and 99.84-Mbit/s total only under an explicit real-low-pass 6-MHz, ideal 12-MS/s, 8-bit/sample model; select E4 as the first nominal raw-rate pass among the G.702 E1/E2/E3/E4 rates; do not treat the 39.424-Mbit/s difference or 71.69% ratio as usable headroom/utilization until mapping, framing, justification, signalling, protection, traffic/QoS, SLA, and lifecycle gates verify actual fit