Transcript Chapter

Chapter
Making a DSL Connection: Case
Study
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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
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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/ind
ex.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
1. 128 Kbps
2. 384 Kbps
Home
Up Stream
Down Stream
Pacific Bell
Office
1. 384 Kbps up to 1.5 Mbps
2. 1.5 Mbps up to 6 Mbps
Two Fast Track DSL speed offerings are available.
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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
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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-toMonth 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
Wall
DSL
Modem
RJ11
Phone
Connection
NIC
RJ 45 Regular Cable
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Computer
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
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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
Double-Click
On Network
Icon
Settings
Control Panel
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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
Components
*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
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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
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Business Access
from Pacific Bell.
Business DSL Features (Continued)
Business Access from Pacific Bell.
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Business DSL Pricing
Business Access from Pacific Bell.
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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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Enhanced DSL LAN Connection
(Multiple IP Addresses)
POTS
Line
UTP (Cat 3 – 5)
Crossover Cable
DSL
Modem
Hub
UTP (Cat 3 – 5)
NIC
Computer
NIC
Computer
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NIC
Computer
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
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Configuring the Electronic Mail
Client
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Glossary of Terms
Source: PacBell Website
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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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POTS Splitter
POTS Voice/Data Splitter
Home
Carrier’s
Central Office
Also know as low pass/ high pass filter.
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