d s ls t r a t e g i e s

Addressing the network

needs of carriers deploying

DSL technology.

Total Access Systems ◆ Internet ◆ Video◆ CSA ◆ Integrated DLC ◆ Truck Roll HDTV ◆ Existing DLC ◆ DSLAM ◆ TotaAccess Systems ◆ Internet ◆ Video ◆ CSA◆ Integrated DLC ◆ Truck Roll ◆ HDTV Existing DLC ◆ DSLAM ◆ Total Access

Expand Your DSLOpportunities.

DSL is key to business success,

from sustaining and growing

market share to additional

revenue opportunities such as

video. Choosing the right

solution for your network

can be overwhelming. ADTRAN

has the expertise and the

solutions you need to grow your

DSL opportunities.

Answers for Difficult Network Questions.Integrated DLC or DSLAM? Pre-provisioned or truck roll per subscriber

addition? ADSL2, ADSL2+, ADSL2++, or VDSL? Can video be deployed

from the existing network? What about HDTV? How much bandwidth is

enough? ADTRAN can help. With our years of experience in loop plant,

combined with our expertise in leading edge technologies, we can assist

you in making decisions that are right for your network.

d s l s t r a t e g i e s

Integrated DLC or DSLAM –Which is more cost-effective?DSL equipment costs have continued

to fall, creating wider opportunities

for DSL service offerings. The cost to

provision the DSL service, including

the truck dispatch to connect the

service, has become a more signifi-

cant cost factor in overall service

delivery. ADTRAN has examined DSL

implementation alternatives that

consider both hardware and provi-

sioning costs with the goal of

developing effective network strate-

gies with our customers.

In existing networks, consider an

adjunct DSLAM. In networks where

POTS service already exists, DSL can

be added with the placement of an

adjunct DSLAM. The adjunct

DSLAM is an attractive alternative in

existing applications since the DLC has

already been purchased and paid for.

In greenfield applications where both

POTS and DSL must be purchased, the

costs of an integrated or pre-provisioned

solution may be more compelling and

is worth consideration.

If POTS already exists, use a DSLAM

and roll the truck. An integrated DLC

can be significantly more costly than a

DSLAM, even with a truck dispatch to

activate DSL subscribers. DSL take rates

must exceed 40% to 50% before any

cost advantage is gained with an

integrated DLC approach. An adjunct

DSLAM provisioned for every POTS

port will eliminate the dispatch and still

may offer cost advantages over an

integrated DLC solution.

Total Access 3010 DSLAM◆ 176 DSL ports, expands to 1056◆ CO and RT applications◆ ADSL, SHDSL, IMA Aggregation◆ DS3, STM-1 network interfaces

Total Access 1200 Series Mini-DSLAMs◆ 24 ports ADSL, expands to 96◆ ATM and IP/Ethernet models◆ E1 IMA, DS3, STM-1 network interfaces◆ Integrated splitters (ANSI or ETSI)

Total Access 1100 SeriesOSP DSLAMs◆ Self-contained, pole or

pedestal mounted◆ Environmentally

hardened◆ Express or locally

powered◆ 24 ports ADSL with

expandable architecture

In new developments or rehab, use

the DLC or DSLAM. For facility rehab

or new construction that requires

new POTS services anyway, the cost

advantages of the truck roll approach

diminish. A pre-provisioned DLC or

DSLAM gains cost advantages at DSL

take rates of 20% to 30%.

Whether you roll a truck or

pre-provision DSL in your network,

the adjunct DSLAM represents one

of the most cost-effective solutions

to providing DSL across the network

for today’s Internet and tomorrow’s

video applications.

Overall Cost Analysis for DSL in Existing NetworkIncremental DSLAM lines represent adjunct DSLAM and truck dispatch.

Pre-provisioned curves represent DSL on every POTS port with no truck

dispatch. Graph results based on conservative industry estimates.

To calculate the cost points for your network, visit our website at

www.adtran.com/dslcalculator

Total Access1000 OSP DSLAM◆ Span or locally-powered

DSLAM◆ 12 ADSL ports, integrated

splitters◆ Small, weatherproof

enclosure◆ Pole, wall, pedestal,

crossbox mountings

ADSL2+. A sustainable video offering

requires DSL bandwidths approaching

20 Mbps. ADSL2+, combined with

2-pair subscriber loop bonding and

advanced video compression, can

deliver three channel HDTV-based

programming across most of a

network designed within CSA guide-

lines. While VDSL offers single pair

access at video bandwidths, it is

constrained to short loops, requiring

re-engineering to place loop electron-

ics within 3 kft of the subscriber.

ADSL2+ extends the downstream

frequency spectrum used in ADSL

from 1.1 to 2.2 MHz and has become

an ITU standard, with commercially

available products in the near term.

2-Pair Subscriber Loop Bonding.

With the introduction of DSL and

cellular phones, access line growth has

been negative, freeing copper pairs.

The addition of a pair to the house-

hold from the DSLAM can reduce the

need to re-engineer the network for

video applications by extending the

effective range of a competitive video

service. While 2-pair bonding can be

accomplished using proprietary

techniques, it limits the service

provider to a single vendor and elimi-

nates the "best of breed" attributes

that standards afford through compe-

tition. Standards efforts are underway

and will be applicable to existing and

future DSL technologies.

Video is key to driving higher

DSL take rates, and HDTV

must be offered to be

competitive in today’s market.

ADTRAN develops solutions that

meet your network needs for

services today and tomorrow.

d

Video Over DSLCan you cost-effectively meet the rising demand for Internet access while

building an infrastructure that supports video? Up to now it has been

difficult and expensive, but three enabling standards may significantly

reduce the costs associated with the "triple play". By implementing these

standards in their broadband networks, service providers will have a

significant advantage over current solutions that do not offer the cost and

competitive benefits of industry standards.

ADSL◆ G.992.1 standard June 1999◆ Frequency range: 138 kHz to 1.1 MHz downstream

25 kHz to 138 kHz upstream◆ Operates over POTS

ADSL2◆ G.992.3 standard May 2003◆ Incremental improvement over ADSL◆ Single-ended test support

ADSL2+◆ Latest ADSL standard G.992.5◆ Higher downstream mode

- Extended downstream frequency rangeto 2.2 MHz

- Operates over POTS◆ Extended reach mode (READSL)

- Objective of 192/128 kbps on 1500 ohm loops◆ Higher upstream mode

- Over POTS -frequency range 25 to276 kHz upstream

- No POTS -25 to 138 kHz or 25 to276 kHz upstream

ADSL2++◆ Standard under consideration◆ Bridges ADSL2+ and VDSL technologies

VDSL◆ DMT VDSL adopted by T1E1.4 for

North America◆ Frequency Plan 998: 22/3 Mbps @ 5 kft

10/10 Mbps @ 3.5 kft◆ Currently short reach, eventually combined

with ADSL technologies for extended reach

s l o p p o r t u n i t i e s

Compression Algorithms. Although

small-scale, standard definition video

service can be deployed using MPEG2

compression, the advent of MPEG4

AVC/H.264 and other advanced

compression techniques provides the

increased quality and the reduced data

rates that dramatically change the

economics of providing a competitive

video service. Industry experts expect

commercially available implementa-

tion of these coding techniques by the

end of 2004. The introduction of

newer compression algorithms will

impact equipment decisions such

as the set top box, for example, in

whether to offer a current solution

that cannot be upgraded or to deliver

video service with the latest compres-

sion technology.

Today’s DSL technologies offer similar performance at CSA limits, but

techniques such as 2-pair bonding can dramatically increase the effective range

of a video service. ADTRAN is committed to establishing industry standards that

improve overall system cost and performance. Total Access systems are designed

with the flexibility to offer the benefits of emerging technologies while remain-

ing the industry’s most cost-effective solutions for DSL access.

*Graph does not reflect implementation loss. Performance can vary as a function of noiseand PSD assumptions.

*

ADTRAN Total AccessDSLAM SystemsThe Total Access 3010 has become the

DSLAM standard for large and small

LECs throughout the industry. Cost-

effective and compact, the high-

density Total Access 3010 has created

DSL expansion opportunities in areas

that were previously considered

uneconomical. With the realization of

its power and flexibility, the Total

Access 3010 is increasingly becoming

the standard for high-density applica-

tions as well, providing the low initial

deployment costs and growth poten-

tial lacking in traditional DSLAM

platforms. The Total Access 1200

Series of Mini-DSLAMs expands DSL

coverage effectively as the ideal

solution for DLCs constrained by

space and lower line counts. The Total

Access 1000 offers span and local-

powered remote access even beyond

the remote terminal.

Central Office Exhaust and

Expansion. With the heightened

interest in DSL promotion and deliv-

ery, many offices have exceeded the

capacity of initially deployed

DSLAMs. The Total Access 3010 HDX

(High Density eXpansion) architecture

brings new advantages to Central

Office capacity concerns. ADTRAN’s

High Density eXpansion architecture

keeps expansion costs in check by

allowing shelf-by-shelf growth,

coupling low initial costs with per

port costs that actually decrease as

systems are added. A single HDX

architecture can support up to 1056

DSL ports with a common network

interface and IP address.

Small Offices and Remote Terminals.

Line counts, cost, available space, and

DSL take rates influence the proper

choice of DSLAM solutions. ADTRAN

offers the right DSL solution for any

combination of factors with the Total

Access 3010 and 1200 series of DSLAMs.

The Total Access 3010 provides up to

176 DSL interfaces and is available in

integrated and external splitter shelf

configurations using the Total Access

3060. For lower density areas, the Total

Access 1200 offers 24 DSL ports in a

single rack unit of space, with expan-

sion capabilities to 96 ports. The

modularity of both systems offers

numerous alternatives for network,

subscriber, and switching interfaces.

Outside Plant SolutionsTotal Access 1000 and 1100 Series

◆ Entire coverage of network◆ DSLAM coverage beyond CO and RT

◆ Fit-anywhere functionality

d s l e x p a n s i o n

ADTRAN’s cost-engineered

products and standards-based

technology delivers reliable,

flexible, and scalable equipment

solutions for network access.

IMA/ATM Aggregation. Many

DSLAMs utilize multiple E1s to trans-

port user data toward the centralized

switch or router to interface the

Internet. Multiple E1 interfaces can

exhaust the port capacity of the router

long before any router processing

limitations are reached, causing

expensive, inefficient usage of

network resources. The Total Access

3010 is commonly used throughout

the industry to aggregate up to 88 E1s

into a single DS3 or STM-1

interface, minimizing router port

requirements and increasing system

efficiency. The Total Access 3010 can

provide subscriber access through

ADSL, SHDSL, and E1 interfaces while

simultaneously providing IMA aggre-

gation services.

IP/Ethernet. Combining core IP

network access with the cost and

transmission advantages of DSL

creates additional coverage and

revenue opportunities. Interfacing the

Total Access 1250 with the Internet

through LAN access is a simple, effec-

tive solution for campus and

multi-dwelling environments.

Outside Plant. To ensure entire

network coverage, ADTRAN created

DSL solutions that extend DSLAM

functionality beyond the CO and RT.

The Total Access 1100 Series of OSP

DSLAMs and Total Access 1000 are

self-contained, environmentally

hardened DSLAMs that can be moun-

ted on a pedestal or pole. Express,

span or locally powered, these DSLAMs

are also a low-cost enclosure solution

for cross-box and DLC retrofits.

CO Exhaust and Expansion SolutionsTotal Access 3010 HDX◆ Shelf-by-shelf growth to 1056 ports◆ Per port cost reductions with port

eXpansion◆ Single IP address and network interface

Small Office and RT SolutionsTotal Access 1200 Series◆ Low start-up costs with future

application scalability◆ 1U size for space constrained locations◆ Modular eXpansion with a single

network connection

DSL Solutions Fit Your NetworkFrom low line count, existing network applications to high density

Central Office, and greenfield opportunities, ADTRAN has a Total Access

DSLAM solution that is right for your network.

V i s i t w w w. a d t r a n . c o m / d s l a m s f o r m o r e i n f o r m a t i o n o n A D T R A N ' s D S L d e l i v e r y s o l u t i o n st h a t a r e r i g h t f o r y o u r n e t w o r k a n d m a x i m i z e y o u r c u r r e n t i n f r a s t r u c t u r e .

© 2004 ADTRAN, Inc. All r ights reserved. ADTRAN is a registered trademark of ADTRAN,Inc. and/or its affiliates in the U.S. and certain other countries. Total Access is a registeredtrademark of ADTRAN, Inc. in the U.S. All other trademarks mentioned in this document are theproperty of the their respective owners.

IT11BRDSLAM-0401

d s l s t r a t e g i e s

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