General Information

• Good Book:"Designing Wide Area Networks and Internetworks: A Practical Guide" by J. Scott Marcus (amazon.com)
• Good Book:"Telecommunications Protocols" by Travis Russell (amazon.com)
• Good Book:"Broadband Telecommunications Handbook" by Regis J. Bates (amazon.com)
• Good Book:"Newton's Telecom Dictionary" by Harry Newton (amazon.com)

Telephony/Telecommunications

• Telecommunications Information
• Telecom Information Resources
• Telecommunication Tidbits
• Telecom Acronym Definitions (CSR)

Modems

• TechFest Modem Page

T1 (DS1), T3 (DS3), E1, J1, etc.

• T Carrier Technical Summary (TechFest)
• T1 Tutorial by Bob Wachtel
• T1 Tutorial (Larus)
• EverythingT1.com
• A discussion on T1
• T1 Basics (Acterna - PDF File)
• The Fundamentals of DS3 (Acterna - PDF File)
• T1 and Fractional T1
• T1 Overview
• Good Book:"T1: A Survival Guide" by Matthew S. Gast (amazon.com)
• Good Book:"The Guide to T-1 Networking" by William A. Flangan (amazon.com)

SDH/SONET

• SONET/SDH Technical Summary (TechFest)
• SONET (very detailed)
• SONET/SDH Notes
• SONET Interoperability Forum (SIF)
• Packet over SONET/SDH (POS) (Cisco)
• SDH Tutorial
• The SONET Home Page
• Synchronous Network Reference (Motorola)
• SDH Tutorial (Marconi)
• SONET Tutorial (Tektronix)
• techguide.com: SONET
• SONET 101 Tutorial from Nortel Networks (PDF file)
• PPP over SONET/SDH (RFC-2615)
• What is SONET?
• The Fundamentals of SONET (Acterna - PDF File)
• The Fundamentals of SDH (Acterna - PDF File)
• SONET Pocket Guide (Acterna)
• SDH Pocket Guide (Acterna)
• Packet over SONET/SDH Pocket Guide (Acterna)
• SONET Primer (Tektornix)
• Good Book:"SONET: A Guide to Synchronous Optical Networks" by Walter J. Goralski (amazon.com)

Frame Relay

• Frame Relay Forum
• Frame Relay (Cisco)
• Frame Relay Networks - A Survey (Ohio State)
• Alliance Datacom's Frame Relay Resource Center
• Frame Relay, An Overview
• An Introduction to Frame Relay (Alcatel)
• Frame Relay Overview
• Books: Search for books about Frame Relay (amazon.com)

WDM (Wavelength Division Multiplexing)

• DWDM Tutorial (iec.org)
• DWDM Testing Tutorial (iec.org)
• Multiwavelength Optical Networking Consortium (MONET)
• optics.org - the online photonics resource
• The International Society for Optical Engineering
• All Optical Networking Consortium
• Optical Internetworking Forum (OIF) Home Page
• Books: Search for books about WDM

SMDS (Switched Multimegabit Data Service)

• SMDS (Cisco)
• SMDS Overview

ISDN (Integrated Services Digital Network)

• Dan Kegel's ISDN Page
• ISDN FAQ (comp.dcom.isdn)
• ISDN (Cisco)
• ISDN Overview
• ISDN (Ohio State)
• National ISDN Council Page
• Books: Search for books about ISDN

DSL (Digital Subscriber Line) (also ADSL,VSDL,VADSL,HDSL,DSL,SDSL,BDSL,xDSL)

• How DSL Works (howstuffworks.com)
• DSL Center (dslcenter.com)
• DSL Forum (dslforum.org)
• DSL ISP Shopper's Guide (dsl-isp-guide.com)
• DSL Life (dsllife.com)
• DSL Prime (dslprime.com)
• DSL Region (dslregion.com)
• DSL Reports (dslreports.com)
• DSL Services (dsl-services.info)
• DSL Service/DSL Providers (dsl-service-dsl-providers.info)
• DSL speed test and tweaks guide (dslspeed.org)
• TeleChoice xDSL Page (xdsl.com)
• comp.dcom.xdsl FAQ by John Kristoff
• NetSpeed's DSL Technology Tutorial
• ADSL Tutorial (iec.org)
• DSL Testing Tutorial (iec.org)
• Primer: DSL Technology (Alcatel)
• Digital Subscriber Line (xDSL) FAQ
• Digital Subscriber Line (DSL) (Cisco)
• Everything DSL
• AnythingDSL.com
• Digital Subscriber Loop (DSL) Chips & Modems & Links
• xDSL Technology
• Dan Kegel's ADSL Page
• Good Book:"Design and Implementation of DSL-Based Access Solutions" by Sanjeev Mervana (amazon.com)
• Good Book:"DSL for Dummies" by David Angell (amazon.com)
• Good Book:"ADSL & DSL Technologies" by Walter J. Goralski (amazon.com)
• Good Book:"XDSL Architecture" by Balaji Kumar, Padmanand Warrier (amazon.com)

Cable Modems

• How Cable Modems Work (howstuffworks.com)
• CableModemInfo.com
• CableModemHelp.com
• Cable-Modems.org
• Cable Modem Resources on the Web
• catv.org
• Cable Modems Tutorial (iec.org)
• Cable Datacom News
• CableTelephony.com
• cable-modem.net
• Cable Modem/DSL Tuning Guide
• Cable Labs
• Digital Audio Visual Council (DAVIC)
• UNH IOL DOCSIS Consortium
• Good Book: Search for books about Cable Modems (amazon.com)

Cellular, Wireless

• Point.com (consumer info)
• CellMania.com (consumer info)
• cellular-news.com
• About cell phones (about.com)
• Cellular Communications Tutorial (iec.org)
• Personal Communications Services (PCS) Tutorial (iec.org)
• Time Division Multiple Access (TDMA) Tutorial) (iec.org)
• Wireless Communications Association International
• 3GPP: A Global Initiative
• CTIA - Cellular Telecommunications and Internet Association
• 3G Americas
• GSM World (GSM Association)
• CDMA Development Group (cdg.org)
• The Cell Site - Digital Cellular, GSM, TDMA
• Tutorial: CDMA and 3G Cellular Networks (Network Magazine)
• Cell Phone Facts (fda.gov)

Satellites

• Satellite Data Networks (Ohio State)
• Satellite Communications (Ohio State)
• Satellite Industry Association

SS7 (Signalling System 7)

• SS7 Tutorial (Performance Technologies)
• Signaling System 7 (SS7) Tutorial (Illuminet)
• SS7 Tutorials (ss7.com)
• SS7 Overview
• Good Book:"Signaling System 7" by Travis Russell (amazon.com)
• Good Book:"Signaling System 7 Basics" by Richard Dreher (amazon.com)

X.25, SDLC, HDLC, BISYNC, etc.

• X.25 (Cisco)
• X.25 Tutorial (Sangoma)
• X.25/HDLC Protocol
• X.25 Tutorial (Tel-Aviv Univ)
• An Introduction to X.25 (Alcatel)
• SDLC (Cisco)
• SDLC Tutorial (Sangoma)
• HDLC Tutorial (Sangoma)
• Asynchronous HDLC FAQ
• Asynchronous Transmission Protocol
• X.21 Protocol
• RS-232, RS-422, & V.35 Tutorial (Sangoma)
• Yost Serial Device Wiring Standard
• RS-232 Connectors and Cabling
• HDLC - A Technical Overview
• HDLC: High Level Data Link Control (RAD Data Communications)
• SDLC Overview