No, you are not eligible to apply for the Jobs in BSNL after12th, to minimum requirements to apply for the BSNL in that applicant should have completed graduation.

Bharat Sanchar Nigam Ltd. conducts recruitment examination for the post of Junior Telecom Officer.

Eligibility:
The applicant should have completed B.E or B.Tech in IT/CSE/ECS/Mechanical with 50% marks, from a recognized university.

JTO Syllabus

1. Materials and components
Structure and properties of Electronic Engineering materials, Conductors, Semiconductors and
Insulators, Magnetic, Ferroelectric, Piezoelectric, Ceramic, Optical and Superconducting
materials. Passive components and characteristics, Resistors, Capacitors and Inductors; Ferrites,
Quartz crystal, Ceramic resonators, Electromagnetic and Electromechanical components.

2. Physical Electronics, Electron Devices and ICs
Electrons and holes in semiconductors, Carrier Statistics, Mechanics of current flow in a semiconductor,
Hall effect; Junction theory; Different types of diodes and their characteristics; Bipolar
Junction transistor; Field effect transistors; Power switching devices like SCRs, CTOs, power
MOSFETs; Basics of ICs-bipolar, MOS and CMOS types; Basics of Opto Electronics.

3. Network theory
Network analysis techniques: Network theorem, transcient and steady state sinusoidal response,
Transmission criteria: delay and rise time Elmore’s and other definition, effect of cascading.
Elements of network synthesis.

For detailed syllabus download the attachment given below

BSNL (JTO) TELECOM Syllabus