Signal fundamentals
Introductory telecom concepts, system goals, and the language used across the platform.
Courses
Choose a course and learn step by step, from telecommunications basics to advanced networking topics.
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Transmission
Signal paths, teletransmission fundamentals, and channel behavior across the full chain.
Network architecture
Network elements, devices, and structures that define how systems connect.
Models
Layered reference models and the abstractions used to describe network communication.
Digital Logic
Bit-level circuits, flip-flops, and the storage primitives behind digital systems.
Conversion
ADC and DAC methods, sampling, and digital conversion structures for analog telecom signals.
Coding
Line coding, synchronization, and timing recovery used to represent symbols on real links.
Error Control
Detection and correction basics that improve reliability of digital transmission.
Modulation
Carrier modulation concepts and signal representation methods used in modern telecom systems.
Advanced Topics
Deeper modulation tradeoffs, symbol timing, and transmission constraints in practical telecom systems.
Multiplexing
Channel-sharing methods from optical WDM to time and frequency multiplexing.
Techniques
Circuit, message, packet, and cell switching techniques across telecom systems.
Switching Fabrics
Internal switching-fabric architectures, node structure, and topological tradeoffs.
Technologies
Exchange technologies and classic telecom switching support functions such as BORSCHT.
ATM
Asynchronous Transfer Mode architecture, services, and cell-switching operation.
Basics
Foundational signaling concepts, call phases, and control-message roles in telecom networks.
SS7
SS7 architecture and protocol families used for robust out-of-band telecom signaling.
ISDN
ISDN architecture, channels, interfaces, protocols, and integrated digital services.
Subscriber Loop
Access-loop architectures, copper last-mile systems, and DSL deployment structure.
Copper Media
Copper transmission media, RF connectors, cabling, and PoE delivery in wired networks.
Infrastructure
Structured cabling, ducts, and outside-plant infrastructure used to build wired access networks.
Testing
Measurement and fault-localization techniques for wired communication media.
Hierarchies
PDH and SDH transport hierarchies, framing, synchronization, and legacy multiplexing structure.
PDH
Plesiochronous Digital Hierarchy framing, justification, synchronization, and E-carrier structure.
SDH
Synchronous Digital Hierarchy transport frames, overhead, management, and SONET alignment.
Transmission media
Optical components, switching nodes, and wavelength-routed transport in fiber networks.
EON
Elastic Optical Networking concepts, flexible grids, and spectrum assignment strategies.
Protection
Protection topologies and recovery mechanisms for resilient wired transport systems.
IP
Internet Protocol addressing, routing identity, and packet delivery structure.
Routing and switching
Routing models, path selection, and control-plane behavior in packet networks.
Ethernet
Ethernet standards, media, and the devices used in local packet network segments.
Data Link
Framing, link control, discovery, and reliability mechanisms between directly connected nodes.
MPLS
Label switching, VPN transport, and traffic-engineering concepts for packet backbones.
Security
Authentication, encryption, monitoring, and defensive controls across packet networks.
Transport
TCP, UDP, checksums, sockets, and host-to-host delivery behavior across packet networks.
Network protocols
Application-layer protocols and service behavior above the transport stack.
Web
Web protocols, browser transport behavior, and HTTP performance mechanisms.
QoS
Traffic prioritization, queue behavior, service metrics, and reservation models in packet networks.
Fundamentals
Wireless propagation, antennas, fading, and radio-spectrum basics.
Wi-Fi
Wi-Fi standards, design, security, and evolution from 802.11a/b to Wi-Fi 7.
Bluetooth
Bluetooth generations, profiles, low-energy modes, and mesh networking.
Short-Range
Matter, NFC, RFID, UWB, Zigbee, Z-Wave, and other short-range wireless systems.
1G
First-generation analog cellular systems such as AMPS and NMT/TACS.
2G
GSM foundations, channels, security, and circuit-switched mobile operation.
3G
UMTS architecture, WCDMA radio access, and early broadband mobile evolution.
4G
LTE architecture, EPC, radio interface design, and packet-first mobile broadband.
4G/5G mobile networks
5G architecture, usage models, and advanced radio techniques such as massive MIMO.
6G
Early 6G vision, terahertz spectrum, and future mobile-network directions.
Satellite
Satellite orbit classes, modern constellations, and architectural trade-offs for non-terrestrial networks.
Compression
Compression theory, algorithms, and practical tradeoffs for telecom and packet-network data.