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Engineering AT&T WorldNet Dial Access. By Dr. Eberhard Wunderlich October 19, 1998. Engineering AT&T WorldNet Dial Access. AT&T Enhanced Dial Platform Architecture The Time to Market Engineering Challenge Internet Dial Traffic Characteristics Current AT&T Enhanced Dial Engineering.

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Engineering at t worldnet dial access l.jpg

Engineering AT&T WorldNet Dial Access

By Dr. Eberhard Wunderlich

October 19, 1998


Engineering at t worldnet dial access2 l.jpg
Engineering AT&T WorldNet Dial Access

  • AT&T Enhanced Dial Platform Architecture

  • The Time to Market Engineering Challenge

  • Internet Dial Traffic Characteristics

  • Current AT&T Enhanced Dial Engineering


At t dial platform architecture l.jpg
AT&T Dial Platform Architecture

Local Dial Numbers

in 350 + cities


At t dial platform application interfaces l.jpg

Transport

Transport

Authentication

Authentication

Authorization

Authorization

Accounting

OA&M

AT&T Dial Platform Application Interfaces

NETWORK

CLIENT

  • Up to V.90, ISDN

  • PPP ( Async & Sync), MPPP

  • Acess via Foreign Networks

  • Async

  • IP

  • PPP over Telnet/TCP

  • Telnet Tunnel / TCP Tunnel

AT&T

D

I

A

L

P

L

A

T

F

O

R

M

  • Domain-Based Routing

  • RADIUS

  • Proxy to External/ Customer

  • RADIUS

  • Proxy for Incoming RADIUS

  • PAP

  • CHAP

  • Assigned AT&T Addresses

  • Source Address Assurance

  • Filters

  • Session Timeout

  • Idle Timeout

  • DNS / WINS Server

  • Domain-Based Routing

  • RADIUS

  • Proxy to External/ Customer

  • RADIUS

  • Proxy for Incoming RADIUS

  • RADIUS (real-time)

  • Call Record Journals

  • (Billing)

  • Network Care

  • Platform DMOQ’s

  • Call Record Journals (stats)


Engineering problem statement l.jpg
Engineering Problem Statement

Local Dial Areas

Deploy Modem Pools

M1… MN such that each

provides less than 1%

Blocking.

Initially D1 … DN will

increase rapidly, but are

unknown (Call Holding

Time, Call Arrival Rate)

Minimize incorrect excess

capacity Mi deployments

D1

M1

D2

M2

MN

DN


At t worldnet market launch offer l.jpg
AT&T WorldNet Market Launch Offer

Pricing Offer

A. $19.95

Unlimited

Personal Use

B. Hourly with

5 Hours/mo.

Free for 12

Months

Customers

Usage

Service

Performance

With 1% Blocking

Target

AT&T WorldNet Dial




Time to market solution vs time to volume solution l.jpg
Time to Market Solution vs. Time to Volume Solution Growth

  • Time to Market Solution

    • Rapidly deploy initial local dial modem pools to meet estimated base capacity requirements

    • Implement regional and national overflow mechanisms to handle peak demands

  • Time to Volume Solution

    • Use established customer traffic trends to engineer local modem pools and serve all traffic via local modems.

    • Use new AT&T Local (TCG) service for cost optimization.



Megacom 800 use l.jpg
MEGACOM Growth® 800 USE

1997 - Transition from TTM to TTV


At t dial platform key statistics l.jpg
AT&T Dial Platform Key Statistics Growth

  • Services and Domains Currently Supported

    Services Login Format/ Domains

    AT&T WorldNet user@att.net, user@worldnet.att.net

    AT&T WVPNS user@company.ics-cug.att.net, user@company.ics-ip.att.net

    user@company.tpt.att.net

    AIM user@inetmail.att.net

    AT&T /JENS Roaming user@…jp, user@…or.jp, user@…attnet.or.jp

    GMS user@attmail.com, user@mail.att.net

  • Scope of Deployment

    • 350+ Local Access Points in the US and Growing

    • Access Interconnection with UUNET

    • Global Roaming with Japan ENS

    • Global WVPN Gateway with Infonet with 34+ Countries

    • Supports 1.5 Million Users & Projected to Carry 15+ Billion Minutes of Total Usage in 1998


Time to volume engineering l.jpg
Time to Volume Engineering Growth

  • AT&T WorldNet defined Offer Pricing to deal with Continuous Machine to Machine applications vs. “Personal use”

  • Engineering moved to a per Local Calling Area Basis, vs. use of Overflow as a Time to Market Mechanism

  • AT&T Local Service (TCG) used where possible


At t worldnet current offer l.jpg
AT&T WorldNet Current Offer Growth

Pricing Offer

A. $19.95

For 150 Hrs.

Per Mo.

$0.99/Hr. Extra

B. Promotions

for Portal Users/

AT&T LD

Customers

$14.95 For

150 Hrs. Per Mo.

Customers

Usage

Service

Performance

With 1% Blocking

Target

AT&T WorldNet Dial


Current at t worldnet results l.jpg
Current AT&T WorldNet Results Growth

Below is a summary of AT&T and Industry scores for the September 1998 Inverse ISP

Benchmark Report. The test period was September 9 through September 23.

AT&T INDUSTRY AVERAGE

MEASURE RATINGS AND SCORES RATINGS AND SCORES

24-HOUR CSR* A+ = 98.4% A = 95.6%

EVENING-HOUR CSR* A+ = 98.1% A = 93.3%

BUSINESS-HOUR CSR* A+ = 98.0% B = 95.0%




Current engineering challenges l.jpg
Current Engineering Challenges Growth

  • Provide Enhanced Real-Time Network Management to Further Improve Performance

  • Provide Enhanced End-to-End Performance Monitoring

  • Introduce new Access Methods, including V.90 Modems, XDSL Access and Cable Access



Slide21 l.jpg

Joint Engineering Required Growth

With AT&T Local (TCG)

as well as the LECs. Trial

Program in place to enable

Optional Client Based

Data Collection Tool so that

Data can be obtained on a

Local LEC Switch Basis

End - to - End Measurements


At t worldnet dial access l.jpg
AT&T WorldNet Dial Access Growth

  • New Access Options

    • 56 KBPS Modem Technology

      • V.90 (Standard based Version of x2™ and K56flex™) implemented

      • 40-53 KBPS Typical Network to PC rates

      • V.34 speeds in PC to Network Direction

    • Access Options in Trial/Planning

      • XDSL Access

      • Cable Access


The v 90 56kbps modem standard l.jpg
The V.90 (56Kbps) Modem Standard Growth

D/A Conversion

(No Quantization Noise)

Direct D/D

Mapping

V.90 56Kbps

Digital

Switch

CB/

Modem

Pool

Digital 64Kbps

IP Net.

Modem

Analog

V.34 33.6Kbps

Internal DSP Modem

Function (Estimating

data from received

analog signal)

A/D Conversion

(Quantization Noise)


Additional sources of information l.jpg
Additional Sources of Information Growth

  • Internet Traffic / Performance Information

    • Inverse Network Technology http://www.inversenet.com/

    • IEEE Communications Magazine

  • 56 Kbps Modems and the V.90 Standard

    • Humblet, P.A., Troulis, M.G., The Information Driveway, IEEE Communications Magazine, Dec. 1966, pp64-68.

    • ITU Drafts and Standards http://www.itu.int

  • AT&T WorldNet Services

    • http://www.att.com or http://www.att.net/


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Engineering AT&T WorldNet Dial Access GrowthConclusion

  • Successful Engineering of AT&T WorldNet Dial Access required different approaches for Time to Market vs. Time to Volume.

  • Engineering is a continuous process requiring continuous improvement to provide Best in Class Performance.