All 19 subjects across both phases. Click any live topic to open its knowledge page — each card shows Theory and Field progress separately.
Railway structure, S&T org, rules, HOER, pass rules, conduct rules, welfare.
Safe working, RE area, fire types, AFDAS, CPR, first aid procedures.
Multimeter, Megger, Earth Tester, TMS Kit, E1 Tester, dB Meter, Psophometer, Clamp Meter, soldering.
Batteries, VRLA, UPS types, SMPS, TIPSS, inverters, DG sets, solar, earthing, surge protection.
EMF, Ohm's law, inductance, capacitance, transformers, rectifiers, power factor, AC/DC, fuses.
S&T MR disconnections, block working, detonators, site protection, accident management.
Hardware, Windows 10 OS, MS Office, servers, modems, peripheral connections.
Quad cables, laying, jointing, testing, fault localisation, cable route plans.
Resistors, capacitors, diodes, Zener, LEDs, transistors (BJT/FET/UJT), SCR, Triacs, ICs.
Control communication, DTMF, HQ control, OFC-based control, VoIP train control, emergency comms.
Number systems, Boolean algebra, logic gates, flip-flops, counters, multiplexers, RAM/ROM.
Wave propagation, simplex/duplex, modulation, VSWR, antenna types, VHF transceiver maintenance.
Push button, DTMF, magneto, IP, DKT, satellite phones. Defect diagnosis, testing, maintenance.
PA system, paging, talkback, IP-based IPIS, GPS digital clocks, video conferencing.
ISDN exchanges, Hipath 4000, Coral Flexicom, VoIP protocols, Asterisk PBX, NGN.
TETRA overview, GSM-R, LTE network architecture in IR, SACFA/WPC clearance, tunnel communication.
Railnet applications, Wi-Fi at stations/trains, PRS, UTS, Freight Operations Information System, COA.
OFC principles, splicing, OTDR, power budget, PCM, PDH/SDH, STM frames, WEBFIL, TEJAS.
Satellite basics, VSAT, disaster management, Accident Relief Trains equipment.
CCTV types, analog vs digital, IP surveillance, VSS components, CCTV networking, fault rectification.
OSI/TCP-IP, routing & switching, IPv4/IPv6, firewalls, LAN/WAN, Block Circuit, SSDAC, EI, Kavach connectivity.
MPLS components, operations, VPN, TAN guidelines, traffic engineering, converged comms.
Kavach overview, UHF communication, link budget, RF planning, KMS, authentication, NMS.