DSL Connection Case Study.ppt

© N. Ganesan, All rights reserved.

Chapter

Making a DSL Connection: Case Study

© N. Ganesan, Ph.D., All Rights

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Chapter Objective

• Describe and demonstrate the following:– Obtaining a DSL service from a

provider– Establish a DSL connection to a single

computer– Connect a LAN to a DSL line


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Chapter Modules

• Basic DSL Information• DSL Services• DSL Network Installation and

Configuration• Enhanced and Business DSL

Configuration• Glossary of Terms


Module

Basic DSL Information


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Case Scenario

• Two different case scenarios will be explored– Connect a single computer to a DSL

line– Connect a LAN to a DSL line

• Case study will focus on making a connection with PacBell's DSL service


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DSL Service Partners at SBC Global Network

• Member of the SBC Global Network– Pacific Bell– Nevada Bell– Southwestern Bell– Ameritech– SNET


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Pacific Bell’s DSL Website• www.pacbell.com/dsl

– For Basic DSL connection details

• http://public.pacbell.net/dedicated/dsl/index.html– For coverage of a number of DSL services

• There are many similarities in establishing the DSL service by other members of SBC Global Network

• Information on DSL availability, cost of different types of DSL services etc. can be found in this website


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Preview of Establishing a DSL Connection

• Check for availability of DSL connection in the area– Checking for availability

• Obtain a DSL Connection• Connect the computer at home to

a DSL line


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Pacific Bell’s Upstream and Downstream Speeds

HomePacific Bell

Office

Two Fast Track DSL speed offerings are available.

1. 128 Kbps2. 384 Kbps

1. 384 Kbps up to 1.5 Mbps2. 1.5 Mbps up to 6 Mbps

Up Stream

Down Stream


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DSL Line Characteristics

• Tagged on to a regular phone line• Phone line and DSL can be used at

the same time• Always-on Internet connection• Higher bandwidth and speed• Point-to-point connection

– Bandwidth is not shared with others


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Bandwidth Comparisons with Other Services

Source: Pacific Bell DSL Website


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Line Connection to the Home

Source: Pacific Bell DSL Website


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Glossary

• PSTN – Public Switched Telephone Network

• POTS – Plain Old Telephone Service

• DSLAM– DSL Access Multiplexor

• ATM– Asynchronous Transfer Mode (ATM)


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Equipment Required for DSL Connection

• NIC (Network Interface Card)• DSL modem• Splitter• Inside wire


Module

DSL Services


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Sample Services and Pricing

Click on the table for source.


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Sample Services and Month-to-Month Pricing

Source: Pacific Bell


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Major DSL Services Example

• Basic DSL• Enhanced DSL

– For LAN access

• Business DSL


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Basic DSL

Features

Single User Access from Pacific Bell.


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Basic DSL Connection

DSLModem

Computer

NIC

RJ 45 Regular CableRJ11PhoneConnection

Wall


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Hardware Installation for External DSL Modem

• Connect one end of the DSL modem to the phone jack (RJ11)

• Connect the other end of the DSL modem to a NIC installed in the computer– RJ45 type of connection is often required– Connect the power supply to the DSL

modem


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Provider Supplied TCP/IP Properties (Static IP Case)

• One static IP address• Subnet mask• Gateway IP address• Primary DNS server IP address• Secondary DNS server IP address


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Email Configuration Details Provided by

PacBell

• Outgoing SMTP Mail Server– mail.pacbell.net

• Incoming POP3 Mail Server– postoffice.pacbell.net

• Email address– [email protected]


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Other Configuration Details

• News NNTP Server– news.pacbell.net

• Default home page address– http://pacbell.snap.com

• Personal home page upload location– home.pacbell.net/UserID


Module

DSL Network Installation and Configuration


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DSL Network Installation Overview

• First install the Network Interface Card (NIC)– Client for Microsoft– Adapter– Protocol (TCP/IP)– Services (If required)

• Configure the protocol with the settings provided by the ISP


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Installing on a Computer Already Connected to a

LAN

• If the computer already is connected to a LAN, an additional NIC need to be installed

• The second NIC is connected to the DSL modem

• The TCP/IP protocol will be installed on the additional NIC and configured based on the values provided by the ISP


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Opening the Network ICON

Start Settings

Control PanelDouble-ClickOn Network

Icon


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Network Property

Sheet


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Adding the Network


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Adding the Adapter


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Installed Compone

nts*Double-click on TCP/IP for configuring TCP/IP properties.


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Configure IP Address

and Subnet

Mask


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Dynamic IP Addresses

• The IP addresses need not be configured if they are dynamically assigned by the ISP


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Dynamic IP Address

Assignment


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Gateway

Enter the gateway address

and click Add.


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DNS and Domain

Specification

•Enter host name and domain.•Enter primary and secondary DNS server addresses.


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Summary of Installation Steps

• Open the network icon• Install network adapter• Ensure or install TCP/IP• Configure TCP/IP properties• Restart the computer• DSL connection will now become active• Check the connection by accessing a

website


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Accessing a Website

After Connection


Module

Enhanced and Business DSL Configuration


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Enhanced DSL

Features

LAN Access from Pacific Bell.


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Enhanced DSL

Features

(Continued)

LAN Access from Pacific Bell.


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Enhanced DSL Pricing

Source: Pacific Bell


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Business DSL

Features

Business Access from Pacific Bell.


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Business DSL Features (Continued)



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Business DSL Pricing



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Enhanced and Business DSL

• The major difference from basic DSL is that the advanced services offer more IP addresses

• Multiple computers can therefore be connected to a single DSL line


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Computer

Enhanced DSL LAN Connection (Multiple IP

Addresses)

DSLModem Hub

POTSLine

NICComputer

NICComputer

NIC

UTP (Cat 3 – 5)Crossover Cable

UTP (Cat 3 – 5)


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Enhanced and Business DSL Configuration

• A hub is needed to connect the various computers to the DSL modem

• A crossover cable is required to connect the hub to the DSL modem

• Software configuration is almost similar to the single DSL connection

• The difference is that each computer will have its own IP address and host name

• Gateway address, DNS addresses etc. will remain the same


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Computer 1: IP

Address


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Computer 2: IP

Address


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Computer 1: Host Name


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Computer 2: Host Name


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Summary of Steps for Enhanced DSL Connection

• Connect all the computers to a hub using regular RJ 45 cable

• Connect the DSL modem to the hub using a crossover RJ 45 cable

• Install the network adapter in each computer and configure the TCP/IP addresses

• Each computer will have its own TCP/IP address and host name


Configuring the Electronic Mail Client


Glossary of Terms

Source: PacBell Website


Module

Glossary of Terms


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Generic DSL

• DSL– Digital Subscriber Line (DSL) that

provides a dedicated digital circuit between a residence and a telephone

• XDSL– A generic terms used for representing

digital subscriber line technologies, such as ADSL, HDSL, RADSL etc.


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Popular Analog and DSL Home Services

• 56K Standards– ITU V.90 (New)– X2 and KFlex56 (Old)

• ADSL– Asymmetric Digital Subscriber Line

(ADSL) – Widely implemented DSL service– ADSL Lite is a low speed

implementation of ADSL


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Other DSL Services

• HDSL– High Bit-rate Digital Subscriber Line (HDSL) – Increasingly being used in place of T1/E1

• IDSL– A DSL service based on ISDN– Initially developed Ascend Communications

• SDSL– Downstream and upstream speeds are the same– Symmetric Digital Subscriber Line (SDSL) – It is a 2-wire implementation of HDSL


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Proprietary DSL Services

• RADSL– Rate Adaptive Digital Subscriber Line

(RADSL)– Often refers to proprietary modulation

standard developed by Globespan Semiconductor

• CDSL– Consumer Digital Subscriber Line (CDSL) is

a proprietary technology trademarked by Rockwell International.


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Emerging DSL Service

• VDSL– Very High Bit-rate Digital Subscriber

Line (VDSL)– This high-speed DSL will operate on

shorter local loops not exceeding 3000 ft


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DSL Modulation Techniques

• CAP– Carrier-less Amplitude/Phase (CAP) modulation– The name is derived from the fact that the carrier itself is

suppressed in transmission– One of two modulation techniques used in ADSL

• DMT– Discrete Multi-Tone (DMT) multi-carrier modulation used

in ADSL– Uses 256 QAM modulation tones simultaneously to create

the ADSL signal– ANSI T1.413 is based on this standard– Recognized by a number of standard bodies


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Service Provider Related Terms

• MSO– Multiple service operator – Another name for cable service

provider.

• NAP– Network Access Point (NAP) – A high-speed connection to the new

Internet infrastructure given to ISPs


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HomeCarrier’s

Central Office

POTS SplitterPOTS Voice/Data Splitter

Also know as low pass/ high pass filter.

DSL Connection Case Study.ppt

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