Explore the complete BSNL JTO Syllabus 2026 with detailed subject-wise topics, exam pattern, marking scheme, and section-wise qualifying marks. Everything you need to prepare smart for the Junior Telecom Officer CBT.

Overview :

The BSNL JTO Syllabus 2026 covers three broad sections Engineering Stream I, Engineering Stream II, and a General Ability Test tested through a Computer-Based Test (CBT) of 120 questions worth 480 marks in 3 hours. Knowing the complete syllabus and exam pattern before you begin preparing is the single most important step toward cracking the BSNL Junior Telecom Officer recruitment. 

Parameter	Details
Conducting Body	Bharat Sanchar Nigam Limited (BSNL)
Post Name	Junior Telecom Officer (JTO)
Total Vacancies	100
Mode of Exam	Online (Computer-Based Test)
Exam Duration	3 Hours
Total Questions	120
Total Marks	480
Negative Marking	Yes (−1 per wrong answer)
Selection Stage	Computer-Based Test (CBT)

BSNL JTO Syllabus 2026 PDF :

Click Here: BSNL JTO Syllabus and Exam Pattern 2026

Interested candidates can explore all latest govt jobs here.

BSNL JTO Exam Pattern 2026 :

Section	Subject	No. of Questions	Marks
Section I	Engineering Stream – I	50	200
Section II	Engineering Stream – II	50	200
Section III	General Ability Test	20	80
Total		120	480

Marking Scheme

• Correct answer: +4 marks
• Wrong answer: −1 mark
• Unattempted question: 0 marks

Section-wise and Overall Qualifying Marks

Candidates must clear both the sectional cut-off and the aggregate cut-off to be considered for the final merit list. Meeting only one of the two conditions is not sufficient.

Category	Minimum Marks per Section	Minimum Overall Marks
Unreserved & OBC (Creamy Layer)	40%	50%
SC / ST / OBC (Non-Creamy Layer) / PwBD / EWS	35%	45%

Selection Process :

Computer-Based Test (CBT)

Subject Wise Syllabus :

Section I – Engineering Stream I

Section I focuses on the foundational and applied areas of electronics engineering. It tests candidates on core concepts that form the building blocks of telecom and electrical systems.

1. Materials and Components This topic covers the properties and behaviour of various engineering materials used in electronic systems.

• Electrical and thermal conductivity of metals
• Semiconductors: intrinsic and extrinsic types
• Magnetic materials and their applications
• Dielectric materials and insulators
• Passive components: resistors, capacitors, inductors

2. Physical Electronics, Electron Devices and Integrated Circuits Candidates must be familiar with the working principles of a wide range of electron devices used in modern electronics.

• P-N junction diodes, Zener diodes, tunnel diodes
• Bipolar Junction Transistors (BJTs) and Field-Effect Transistors (FETs)
• Silicon-Controlled Rectifiers (SCRs) and CMOS technology
• Opto-electronic devices: LEDs, photodiodes, LCDs

3. Network Theory This section requires a strong grasp of circuit analysis techniques and the behaviour of electrical networks.

• Network theorems: Thevenin’s, Norton’s, Superposition, Maximum Power Transfer
• Transient and steady-state analysis of circuits
• Two-port network parameters
• Transmission line theory and applications

4. Electromagnetic Theory Covers the principles governing electromagnetic wave propagation and the design of transmission systems.

• Maxwell’s equations and boundary conditions
• Wave propagation in free space and guided media
• Waveguides: rectangular and circular types
• Antenna theory and radiation patterns

5. Electronic Measurements and Instrumentation Tests the candidate’s knowledge of measurement techniques and the instruments used in electronics labs and field deployments.

• Types of errors in measurement and their sources
• CRO, signal generators, frequency meters, Q-meters
• Transducers: thermocouple, strain gauge, LVDT
• Data acquisition, telemetry, and remote sensing systems

6. Power Electronics Covers the design and operation of power conversion circuits and control systems used in modern electrical and telecom infrastructure.

• Thyristors, TRIACs, GTOs and their triggering methods
• AC-to-DC converters and rectifiers
• DC-to-AC inverters
• Switched-Mode Power Supplies (SMPS) and Pulse Width Modulation (PWM)

Section II – Engineering Stream II

Section II goes deeper into advanced electronics, communication systems, computing, and microprocessor-based systems all directly relevant to telecom engineering roles.

1. Analog Electronic Circuits Focuses on the design and analysis of analog signal processing circuits.

• Small signal and large signal amplifiers
• Feedback amplifiers and oscillators (RC, LC, crystal)
• Operational amplifiers (Op-Amp) and their applications
• Regulated and unregulated power supply circuits

2. Digital Electronic Circuits Tests candidates on logic design and the digital systems used extensively in communication and computing hardware.

• Boolean algebra, logic simplification, Karnaugh maps
• Combinational logic: adders, multiplexers, decoders
• Sequential circuits: flip-flops, registers, counters
• Memory devices: RAM, ROM, EEPROM
• Analog-to-Digital (A/D) and Digital-to-Analog (D/A) converters

3. Control Systems Covers the theory and practical aspects of automatic control systems, which are fundamental to telecom network management.

• Open-loop and closed-loop (feedback) control systems
• Time-domain and frequency-domain analysis
• Stability: Routh-Hurwitz criterion, Nyquist criterion
• Root locus and Bode plot techniques
• PID controllers and their tuning

4. Communication Systems One of the most important sections for a telecom officer, covering all major modulation and transmission techniques.

• Analog modulation: AM, FM, PM
• Digital modulation: ASK, FSK, PSK, QAM
• Multiplexing techniques: TDM, FDM, WDM
• Noise analysis and signal-to-noise ratio
• Optical fibre communication systems
• Satellite communication: VSAT, GPS

5. Microwave Engineering Tests understanding of high-frequency devices and systems critical to wireless and satellite-based telecom.

• Microwave transmission lines and waveguides
• Microwave devices: klystron, magnetron, travelling-wave tube
• Microwave antennas: horn, parabolic dish, patch antennas
• MASER, LASER, and their telecom applications
• Propagation of radio waves: ground wave, sky wave, space wave

6. Computer Engineering Covers digital computing principles that underpin modern telecommunication network infrastructure.

• Number systems and data representation
• Computer organisation and architecture
• Memory hierarchy: cache, RAM, virtual memory
• Input/Output systems and interfacing
• Basics of programming and algorithm design
• Operating system concepts

7. Microprocessors Tests the candidate’s practical understanding of microprocessor systems and their role in telecom equipment.

• Architecture of 8085 and 8086 microprocessors
• Instruction set and addressing modes
• Interrupts and interfacing with peripheral devices
• Microcontroller applications in telecom systems

Section III – General Ability Test

The General Ability Test assesses candidates on non-technical parameters including language skills, current awareness, and general knowledge. Though it carries fewer marks (80 out of 480), performing well here can improve your overall rank and you cannot afford to fail the sectional qualifying threshold.

Topics covered in this section include:

• English Language: Reading comprehension, grammar, vocabulary, sentence correction, and basic written communication
• Current Affairs: National and international events, government schemes, science and technology developments
• General Knowledge: Indian history, geography, polity, economy, and Constitution
• Everyday Science: Basic scientific principles, everyday observations, and environmental science
• Telecom Awareness: Awareness of India’s telecom sector, key policies, and developments in BSNL

Important Topics for Exam :

• Prioritise Sections I and II. Together they account for 400 out of 480 marks. Build conceptual clarity in core topics like Communication Systems, Network Theory, and Digital Electronics first.
• Do not neglect the General Ability Test. It carries 80 marks and has a separate sectional qualifying threshold. Consistent reading of current affairs and basic English practice will keep this section manageable.
• Practise negative marking management. With a −1 deduction for each wrong answer, avoid guessing on topics you haven’t studied. A disciplined attempt strategy matters as much as preparation depth.
• Use previous year question papers. BSNL JTO previous year papers help you understand the question type, difficulty level, and most frequently tested topics.
• Revise formulas and theorems regularly. Topics like Control Systems, Network Theory, and Electromagnetic Theory are formula-heavy. Maintain a revision sheet and revisit it weekly.

Check Full Syllabus: Latest Syllabus

FAQ: