1. Guided By:-
Department of Electronics & Telecommunication Engineering
Smt. Kashibai Navale College of Engineering, Pune - 41.
Sponsored By: -
Group No: -
2. To install synchronous digital hierarchy (SDH)-
STM4 equipment setup at source and destined
location. Provide end to end connectivity using
optical fibers. Configuration of network and routing
data to reach destined location.
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3. Synchronous Digital Hierarchy (SDH) is digital
transmission system protocol, standardized by ETSI that
transfer multiple digital bit streams synchronously over
optical fiber using lasers.
SDH is ideal for network providers, because it delivers an
efficient, reliable network management system that easily
adapts to accommodate bandwidth–consuming application
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4. Jan 8, 2017 SKNCOE BE (E & TC) – 2014 15 4
Survey Transmission rates of up to 10G can be achieved in
modern SDH system. SDH has got extensive OAM & P
capabilities that is operation, administration, maintenance and
This technology is applied all round the globe with different
governing regulation. This is purely transmission technology
and it is latest. Hence it is deployed by many telecom service
5. 1. Abstract
3. Block Diagram and description
6. Results and Conclusion
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6. Popularity of SDH systems among telecom service
providers became prime motivation behind this project.
SDH is a multiplexing protocol in which two or more
signals are transmitted at nominally the same digital rate and
their significant time instances occur at nominally same time.
This project deals with the installation and commissioning
of SDH equipment in the field.
The equipment used in this project is SDH-STM-4 which is
make of Fibcom Corp.
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7. SDH-STM-4 equipment has transmission capability of four
times that of STM-1 that is approx. =4 x 155 =622 Mbps.
Prime achievement of SDH is, it is optical signal
transmission standard and can interconnect multi-vendor
After installation, the network is configured and data
transfer from one end to other is verified by various
application layer protocols such as HTTP, FTP, ping
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9. From block diagram, prime components of the system are
optical fiber media, SDH-STM 4 equipment, routers,
network management software and computers to provide
Considering OSI model for network establishment, optical
fiber media belongs to physical layer, SDH-STM 4 is in data
link layer, routers are part of network layer and application
layer protocols such as HTTP,FTP are experimented using
SDH uses Time division multiplexing (TDM) to transmit
constant stream of information.
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12. DC distribution box :Acquired -48V dc line from the power plant.
Used three BENTEC 6Amp MCB to distribute power supply among
three equipment. Common the negative terminal and make the Positive
Affix the equipment frame to firm ground:
By keeping the standards of ETSI, assembled
two STM-4 equipment frames and bolted them to firm ground.
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15-16.ADM card(+21 PCMs)
17.TEX1 card(21 PCMs)
4.TEX1 card(21 PCMs)
7.Power supply card
13.Standby Power supply card
3,5,9,11,17- Five TEX1 cards
14. Mounting of modules to STM rack and interconnecting motherboards
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16. In this project, E1(2.048 Mbps) links are connected to STM-4
equipment which has capability to multiplex at 622 Mbps and
transmit on optical fiber media which has very high bandwidth.
Data to be transferred is mapped to SDH frames.
During the process, header and extraneous bits are added for
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18. Following diagram shows real time network multiplexing
strategy on NM2100 software.
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19. Jan 8, 2017 SKNCOE BE (E & TC) - 2014 15 19
1ST ROW 2ND ROW 3RD ROW
I I I
20. Each STM frame lasts for 125 µsec.
BIT RATE : STM-N
Number of rows = 9
Number of columns = 9+261=270
Number of bytes = 9×270
Number of bits = 9 × 270 × 8
Number of bits / second = 9 × 270 × 8 × 8000
=155.520 Mbps (STM-1)
Bit rate of STM-N = (N × 155.520) mbps
=4 × 155.520=622.08 Mbps(STM-4)
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24. Simplified multiplexing and de-multiplexing techniques.
Direct access to lower order tributaries.
Accommodates existing PDH signals.
Capable of transporting broadband signals.
Multi-vendor, multi operator environment.
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25. Thus this project is implementation of SDH transmission
system which is modern and latest technology used
across the globe.
Commissioning the system builds up solid network of
exchanges and hence certainly improve quality of
This technology is applied all around the globe with
different governing regulation. This is purely
transmission technology and is latest. Hence it is
deployed by many telecom service vendors.
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26.  EETP-BSNL silver certificate courseware-Digital Transmission system (DTS).
Bharat Sanchar Nigam Limited (A Govt. of India Enterprise) JTO Phase-I (Revised)
“Fundamental of Transmission “curriculum.
 User’s Manual Fibcom Focus AC1 ADM and TM for STM-4 and STM-1 Levels.
 “Lecture 9-SDH / SONET system”, by Prof. Ghosh on NPTEL.
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