Dr.Pandian Institute of Telecommunications Ltd

2 week Short Term Course on

OPTICAL COMMUNICATION, SDH and DWDM

Faculty Profile

Dr.G.Soundra Pandian will be your course co-ordinator. He has trained several 1000's of Engineers on SDH since 1996. He has a vast teaching experience as a Faculty in the Dept. of EE of IIT Delhi and aa a trainer of corporate Telecom Engineers. He has trainined thousands of Engineers on GSM and other Telecom subjects since 1996 to many companies including the GSM operators like Hutch, CDMA operators like Tata and Shyam Telelink (Hellorainbow), Multinational companies like Alcatel, Ericsson and software companies like Skyworks (US based), Bharti Telesoft, Sasken, NPI and international PTTs like IRAN and OMAN as well as Govt. Departments like Railways, BEL etc.

COURSE CONTENT:

OPTICAL COMMUNICATION, SDH and DWDM

Duration: 1 week

Module 1

Optical Fibre Communication

SESSION 1:- Light propagation in the optical fibre Propagation of Light in a glass fibre, Multimode fibre, single mode fibre, V number, Solution for Waxwell’s equation and field pattern in the fibre, Modal Dispersion, Mode Field Diameter

SESSION 2:-Attenuation and Dispersion Attenuation phenomenon, properties of fibre, G652, G.653, G 654, G655, Dispersion characteristics, Bandwidth of fibre and maximum repeaterless length of a fibre.

SESSION 3:- Optical Communication Light Sources Principle and construction LED and Laser Diodes and sources for fibre optics, Fabry-Perot Lasers, Line width, DFB lasers, Optical power versus bias current curves, v-I characteristics of Laser diodes, Temperature dependence of Laser Power, Automatic Laser Shut Down

SESSION 4:-Optical Communication detectors Principle and construction Photo detectors, Pin, APDs, Optical Receivers, Noise, Sensitivity, Link Design Issues.

 SESSION 5:-Transmitter and Receiver circuits Analog and Digital Modulation of Laser Diodes, Extinction ratio, Temperature control of Lasers, Mean Power Control of Laser, Clock Recovery.

SESSION 6:- SDH Link Engineering and Testing OTDR Measurements, detection of fiber cut and fiber splicing loss, Optical Power meter, Optical attenuator, Receiver sensitivity, BER calculation, Transmitter power and receiver sensitivity required as per CCITT standards, Margins and penalties in the link design, Eye Diagram, pulse mask for STM-N systems.

Session 7. PDH Fundamentals PCM CODEC, G703 standards, 64 kbps Interface, co-directional and contra- directional Interface, structure of E1 and T1 signals, Multiplexing of 2 Mbps into 8 Mbps (E2) multiplexing of 8 Mbs into 34 mbps (E3) and multiplexing struc- ture of E4 (140 Mbps), Line coding fundamentals.

Module 2

 SDH MAPPING FUNDAMENTALS

1. Introduction to SDH.

2. STM-1, Frame Structure, RSOH, MSOH and payload Multiplexing structure of SDH, VC12, TU12, TUG2, TUG3, VC4, AU4, STM-N, Frame structure of SDH for microwave Radio communication, SONET (Synchronous Optical Network)

3. AU4 Concatenation Fundamentals.

4. SDH mapping Fundamentals Multiplexing of 63 E1’s to for STM-1 showing the different signal formats of VC12,TU12,TUG2, TUG3,VC4,AU4, and STM-N, Multiplexing of 34 Mbps (E3) into VC3, Multiplexing of 140 Mbps (E4) into VC4.

5. Frequency Justification in SDH

6. Virtual containers VC12, VC3, VC4, path overhead (POH) bytes, Address of a VC.

7. Origin of Jitter in SDH and design of the elastic buffer for an SDH

8. Jitter Masks.

9. Wander Fundamentals

10. Tutorial

Module 3

 SDH SYSTEM ARCHITECTURE

1. CCITT spec of the system Architecture of SDH network Elements, G-783 specifications, Synchronous physical Interface (SPI) section Adaptation HPT, HPC, HPA, LPC, LPT, LPA, PPI, SEMF, MCF, Multiplex Timing, S-reference points, alarms defined by the specifications

2. Protection switching fundamentals, Algorithm for K1 K2 bytes.

3. Synchronous Physical Interface (SPI).

4. Timing and Network Synchronization.

5. ADM (Add Drop Multiplexers), Type of Multiplexers specified by ITU-T.

6. ATM Fundamentals

7. Need for Network Management,

8. 7-layer OSI,

Module 4

NMS and PROTECTION RING

1. G. 784 specifications for management and configuration of SDH, Protocol stack for Management Network, Data communication channels D1D2D3 bytes based 192 kbps, and D4-D12 based 576 kbps streams,

2. SNMP and CMIP Protocols for NMS

3. Concept of TMN, F-interface, Q3 interface, NMS for SDH.

4. SDH Rings, GSHR-1 specifications, MS Dedicated Rings, MS Shared protection Rings, 2 Fibre and 4 Fibre rings,

5. SDH Ring Network and Backbone network design for Basic service providers

6. APS protocol for Span switching and Ring switching.

7. Recovery from Timing Loop faults in Rings.

8. SNC/I and SNC/N protections.

Module 5

 DWDM Fundamentals

Coherent Optical Communication

Fundamentals Optical Heterodyning, FSK, PSK, ASK optical modulation and demodulation, Polarization Controllers, External Optical modulators, optical Amplifiers, non-linearity and power limit in fiber.

DWDM INTRODUCTION

 Wavelength Division multiplexing in the initial days, Dense Wavelength Division multiplexing DWDM and 100 GHz wavelength separation, Competing Technology of Course Wavelength Division multiplexing (CWDM) with 20 nm spacing.

DWDM SPECIFICATIONS BY ITU-T

Spec G.692E Application codes for multi channel systems without line amplifiers, Representation of optical line system interfaces, Optical supervisory channel implementations, Central frequency deviation, Attenuation (22 dB, 33 dB, 44 dB), Dispersion, Nominal central frequencies, Selection of the minimum channel spacing and grid reference frequency for the WDM plan, channel-allocation methodology for applications on G.653 fibre based on unequal channel spacing, Use of pre-equalisation at MPI-S, Extension of G.692 to include bi directional WDM transmission.

DWDM system components

Components used in DWDM systems, Grating Theory, Gratings component, Arrayed Waveguide Grating, Thin film filter, Multiplexing using couplers, Optical add/drop multiplexers (OADM), Optical Cross connects and Switching, Optical Transponder, Need for external optical modulator in DWDM, Optical Attenuators, Optical connectors.

 EDFA

Optical Bands defined by ITU-T, Optical amplifiers (EDFA’s) from manufacturers and typical specifications of the parameters, Optical pumps used for EDFA’s, 3 wavelengths used for pumps.

DWDM Link Engineering

Dispersion in the fiber, Use of optical amplifier and its gain, dispersion compensation, understanding of NOISE FIGURE and OSNR, relationship between Q and BER, Formula for OSNR for cascaded optical amplifiers, Polarization dependent Loss (PDL), Link calculations on OSNR for DWDM link engineering, PMD, Location of DSF, Link calculation of PMD, losses in DWDM components, Link design flow chart, penalties and margins in DWDM, Problem for DWDM link design and solution. Performance evaluation Equipment Required for Optical and DWDM Testing, Measurement of Q factor from eye diagram, measurement of OSNR, Testing of Insertion Loss, Testing of the Optical Spectrum, measurement of Gain tilt in EDFAs, End-to-End BER Testing, Mid-Span BER Testing, Tips for DWDM measurements, Chromatic dispersion at STM-16, PMD measurement.

Fees:Please contact Dr.Pandian to know the Fee structure

Duration of the course: 60 hours 

Location of the Training: GREATER NOIDA.

Car pick-up will be arranged for Delhi candidates from Atta Market, Sector-27, Noida to the training location in Surajpur.

If you are staying in cities other than NCR, you may still register for the course and in that case you may stay in Delhi/Noida during the course. If sufficient registrations are there we may float the course in other cities also.

For outstation candidates, we can arrange accommodation in Delhi/NOIDA/Greater Noida but with additional cost.

Minimum Qualifications:

The minimum qualifications: B.E./B.Tech/Diploma in ECE/EEE/CS/IT or equivalent.

A cerificate will be given at the end of the course.

Dr.Pandian Technologies