Paper Code: ETEC-310	L          T          C
Paper: Telecommunication Networks	3           1           4

UNIT - I

Introduction to Telecommunication networks:

Overview of network structure and services, Overview of regulatory bodies and standers.
Evolution of Basic Switching System: Brief Overview of manual system; Brief overview of strowger step-by step system; Brief overview of Cross system; Brief Introduction to Electromagnetic Exchanges

Control of switching system:

Stored Programme Control; Centralized SPC, Distributed SPC; Software Architecture, Application Software; Enhanced Services.

UNIT - II

Vocodors:

Channel Vocoder; Forment Vocoder; Linear Predictive coding (LPC) based Vocoder; Pulse Transmission on Transmission line concepts.

Error detection and correction codes:

Error detection codes(parity ,Linear block codes, cyclic redundancy check(CRC codes); Brust error detecting and correcting codes; Convolution codes.

Frequency division Multiplexing (FDM):

FDM frames and hierarchy

Time Division Multiplexing (TDM):

TDM frames and hierarchy; Bit interleaving; Word interleaving
Space division switching: Two stage network; Multistage network; Blocking probabilities , Lee graphs

Time Division Switching:

Time Division space switching; Time Division Time Switching; Time multiplexed space switching; Time multiplexed Time Switching; Combination Switching.(two stage- TS,ST switch); Multistage Switching networks (TST, STS ,n-stage switches); Blocking probabilities, Lee graphs of multistage switching networks.

UNIT - III

Network traffic load and parameters
Grade of Service and Blocking Probability

Telecommunication transmission and Subscriber loops:

Cable hierarchy for subscriber loops; Reference equivalents (RE); Two wire to four wire interface; Echoes and singing; Echo suppressors and echo cancellers; Subscriber loop interface (SLIC) and BORSCHT functions; Switching Hierchy and Routing; Transmission Plans; Signaling Techniques; In channel, Voice frequency signaling; PCM signaling; Common channel signaling; Overview of SS6 and SS7 signaling systems

Radio System:

Overview of Ionospheric and Tropospheric scatter communication; Line of sight (LOS) microwave communication; Link behavior, Antenna gain; Link budget analysis; Fading and Diversity techniques.

UNIT - IV

Satellite communication; Overview of Geosynchronous and geostationary satellites; VSAT system, SCPC; Overview of FDMA , TDMA and CDMA; Satellite link budget analysis; Overview of Coaxial cable system and optical Network (SONET); Circuit switching and packet switching; Overview of Moderns; Overview of ATM (transport mechanism ,cell structure , switching); Overview of ISDN(Architecture,P-ISDN,B-ISDN); Overview of WLL (Wireless loop); Overview of high data Digital Subscriber loops (ADSL(Asymmetrical Digital Subscriber loop), VDSL); Overview of Local Microwave Distribution Services (LMDS); Overview of AIN(Advanced Intelligent Network)

TEXT BOOKS:

1. Thiagarajan Viswanathan, “Telecommunication  switching systems and networks” PHI – 2001.
2. J.C. Ballamy, “Digital Telephony” Wiely, 3rd Edition.

REFERENCE BOOKS:

1. J. E. Flood, “Telecommunication  switching  and traffic networks” Pearson education, 2002.
2. Freeman, “Telecommunication  systems  engineering” Wiely, New York – 3rd Edition.
3. W Tomasi, “Electronics Communication systems” Pearson – 5th Edition.
4. B.P Lathi, “Modern analog and digital communication systems” Oxford, 3rd Edition.