Course detail

Access and Transport Networks

FEKT-BPC-PTSAcad. year: 2020/2021

The subject deals with the evolution of telecommunication networks and their convergence with computer networks. The stress is placed on modern analysis of access and transport networks while considering their diversity and also concurrent features together with the application of analogue and digital modulations. Primary attention is given to the complex usage of an E1 frame by ITU G.703 recommendation. Students obtain a view of the private and public telephony exchanges, they understand the principles of digital switches, of the current signalling system SS7 and of the SIP internet exchange. Out of print will specificity of measuring in converged networks. Basic attention will devoted to higher order digital systems, to protection of transport networks and to quality evaluation.

Language of instruction


Number of ECTS credits


Mode of study

Not applicable.

Learning outcomes of the course unit

Upon course completion, students will be able to:
- differentiate between the relationship of access and transport networks and their facilities solution,
- apply analogue and digital modulations,
- explain the terms sampling, quantization and coding,
- discuss sampling theorem,
- explain the E1frame,
- express the spectrum of sampling signal,
- measure active network elements,
- set SIP exchange and digital transmission equipment,
- take one's bearings in higher order systems
- evaluate the development of converged networks


The course is obligatory, students should be able to:
- demonstrate the principles of circuit switching,
- interpret the principles of packet switching,
- enumerate the possibilities of separating communication channels,
- express the idea of A/D and D/A conversion,
- discuss elemental terms of the signal processing area,
- apply the basic principles and protocols of the Ethernet network.
Students should have the basic knowledge of communication systems, which they obtained in the obligatory courses in their previous study.


Not applicable.

Planned learning activities and teaching methods

Teaching methods include lectures and practical laboratories. The part of this course is a presentation of results in power point. Course is taking advantage of e-learning (Moodle) system.

Assesment methods and criteria linked to learning outcomes

10-30 points - obligatory written test from laboratories,
0-70 points - written exam with e-learning support, compulsory part for course completion.
Exam is focused on verifying the orientation of access and transport networks, detailed analysis of digital transmission on frame E1 base, convergence understanding.

The exam from the subject will take place in person and remotely.

Course curriculum

1. Basic concept, telecommunication technologies, parts of communication systems.
2. Standardization organizations, ISO, ITU, ETSI, Forums, RFC documents
3. Time division multiplexing and digital modulations, PCM, ADM, ADPCM and others
4. Encoders and decoders PCM, compandors, compression advantage, A and mí low characteristics
5. Structure of frame and multiframe E1, Recommendation ITU G 703.
6. Access and Transport Networks, definitions, new knowledge of convergence
7. Switching systems, exchanges, digital switching array, signalling, SIP telephone exchange, software equipment
8. Transmitted signal, link codes, synchronization of digital systems
9. Analysis of total distortion, quantizing and limiting distortion, spectrum of sampling signal
10. Measuring in converged systems, BER measuring, delay and jitter measuring, SW analysis
11. Higher order digital systems, SDH multiplexing structure, frame structure, integrating
12. Transport networks protection, quality evaluation
13. Advanced converged networks development

Work placements

Not applicable.


Giving a comprehensive overview of all most important parts of the converged network, which is here comprehended as a tool for transmitting information to a required recipient in required quality. Access network solutions, means of traffic concentration, integration of services, multiple utilization of transmission media. Principles of the computer network in relation to the classical telecommunication network.

Specification of controlled education, way of implementation and compensation for absences

Attendance at laboratories and individual project are compulsory, justified absence from laboratory exercises can be made up after prior arrangement with the instructor.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

ŠKORPIL, V.: Přístupové a transportní sítě. VUT, Brno 2013.
ŠKORPIL, V., POLÍVKA, M.: Přístupové a transportní sítě, laboratoře. VUT, Brno 2013.

Recommended reading

ODOM,W. and HEALY,R. and MEHRA,N. Směrování a přepínání sítí. Computer Press, Brno 2009.


Classification of course in study plans

  • Programme BPC-AUD Bachelor's

    specialization AUDB-ZVUK , any year of study, winter semester, elective
    specialization AUDB-TECH , any year of study, winter semester, elective

  • Programme BPC-AMT Bachelor's, any year of study, winter semester, elective
  • Programme BPC-EKT Bachelor's, any year of study, winter semester, elective
  • Programme BPC-MET Bachelor's, any year of study, winter semester, elective
  • Programme BPC-SEE Bachelor's, any year of study, winter semester, elective
  • Programme BPC-IBE Bachelor's, 3. year of study, winter semester, compulsory-optional
  • Programme BPC-TLI Bachelor's, 3. year of study, winter semester, compulsory

Type of course unit



26 hours, optionally

Teacher / Lecturer


1. Introduction to the course. Evolution of telecommunication networks. Analogue and digital modulations. Modulations PCM, DM, ADM, DPCM, ADPCM. Terrestrial non-mobile networks, mobile networks, Wireless networks, Satellite networks. Terminals.
2. Access networks. Definition and function of access network. Architecture of access network. Level of access network. Optical access networks. local networks LAN, topology of LAN, LAN standards, technology Token Ring.
3. Transport networks. Definition and function of transport network, architecture of transport network, data transmission in transport network, security of data transport on transport network. wide networks WAN, networks Frame Relay.
4. Telephony exchanges. Operating system, operational load. Main operational hour, losses. Digital switching area, multiplexing, one-part and multi-part switching areas.
5. Digital switches S and T. Controlling and signalization in digital exchanges. System SS7. Systems EWSD and S12. Internet SIP exchange.
6. Transmission systems. Encoders and decoders PCM, A/D, D/A converters. Compandors and non-linear encoders, mí-low characteristic, A-low characteristic. Link codes. Recommendation ITU-T G.703, frame and multi-frame of 1st order system - E1. Transmission equipment PCM 30U and PCM 30U- OCH.
7. Analysis of total distortion at access and transport networks. Distortion allocation. Simplified calculation of Attenuation of quantizing distortion. Peak limiting for harmonic and noise signal. Analysis of sampling signal spectrum, spectrum for PAM 1st order and 2nd order.
8. Measuring at digital transmission systems. Analyser and generator of PCM signal, generator of pseudo-random sequence. Modern analysators. Check of digital signal step by step - BER measuring. Measuring of quantizing distortion, jitter measuring, residual attenuation measuring. ¨
9. Higher order digital systems. Plesiochronous Digital Hierarchy - PDH, Synchronous Digital Hierarchy - SDH, termino

Laboratory exercise

26 hours, compulsory

Teacher / Lecturer


1. BER measuring CBT course
2. Active network elements measuring
3. PCM encoding (BT)
4. Modulation at access networks (ST)
5. Link code at TIMS system
6. SP telephone exchange configuration
7. Basic configuration of access router
8. Sampling and signal reconstruction (ST)
9. Measuring of E1 transmission equipment
10.PCM30U-CH equipment configuration