Lecture 12

Networks II: Data Networks
The Synchronous Digital Hierarchy (SDH)

May 5, 2004



Introduction: reference (local copy)

Review of Switching and Access Modalities: reference 

Circuit Switched Networks Revisited:

In the beginning there was a monolithic hierarchy based on analog signals and FDMA…
Simple hierarchy
Typical network
Then came PCM, TDMA and the digital hierarchy

Packet Switched Networks:

Simple packet switching network
Packet switching schematic
Packet switching: datagram approach
Packet switching: virtual-circuit approach
Virtual-circuit configuration

The Need for Network Protocols:

A brief introduction to network propocols

SDH and SONET: reference

Schematic Multiloop Network 

DWDM channels - 100 GHz separation

An extended discussion of SONET

References:

Internetworking Technology Overview: extensive and uthoritative information on internet issues from Cisco Systems.

Data Communication Networks and Distributed Systems: a quite extensive set of lecture notes by Saleem N. Bhatti, University College London.

Nortel Tutorials

Telephony 101: (pdf) A basic introduction to how public network telephone services are provided in North America.
SONET 101: (pdf) An introduction to synchronous optical networks.
Introduction to SONET Networking: A tutorial handbook of advanced SONET networking concepts.
Long Distance 101: An introduction to how long distance service is delivered in North America, and opportunities for network providers in the long distance arena.
Frame Relay: a vitual textbook by John H. Petrangelo at Worcester Polytechnical Institute
on the subject of Frame Relay

Tutorials and Technical Notes from Sangoma Technologies

Tutorials fron Scan Technologies


This page was prepared and is maintained by R. Victor Jones
Comments to: jones@deas.harvard.edu.

Last updated January 8, 2000