© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID 1

A Perspective on VoIP: Where we are Today and the Challenges for Tomorrow

Jonathan Rosenberg

Cisco Fellow

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A Long Road

70’s and 80’s

Early to Mid90s

Late 90s to Early 00

Mid 00 to Now

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Today: Enterprise

4.3M IP phones shipped 1Q07

63.8% of the PBX market in 1Q07 was IP

Vast majority of phones on peoples desk still TDM

4.3M1Q07

IP vs. TDM 1Q07

TDM32%

IP68%

IP TDM

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Today: Service Provider

Huge growth in Cable voice – millions of lines in U.S.

Millions of customers in the ASP market – Vonage, Broadvoice, etc.

Essentially zero VoIP endpoints for wireless

Vast majority of Endpoints still TDM 0

0.51

1.52

2.53

3.54

4.55

U.S.Cable

AppProviders

Wireless

Millions

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What Challenges Lie Ahead?

Federation

Interoperability

Emergency Services

SPAM

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Federation Today

PSTN

Enterprise A

Branch 1 Branch 2

CableProvider

Region1

Region2

ASP

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What are the Barriers to IP Federation?

Routing

QoS

Troubleshooting

Presence and IM Scale

Security

SPIT

Firewall and NAT Traversal

Protocol Interop

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Interoperability

The Confusion of Tongues

– DTMF

– Codecs

– Security

– IM

– Advanced Features

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Example: CPL

Here is my CPLScript for

Call Forwarding

I provide CF, set upVia XCAP. Whatis this CPL thing?

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Emergency Services

Individual to Authority:911

Authority to Individual:Warnings

Authority to Authority:Communications

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Individual to Authority

Location

Determination

Location to

Emergency Call

Center Mapping

Location

Conveyance

Emergency

Call

Determination

Mid-Call

Services

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The Real Problem: Separation of Roles

KnowsLocation

NeedsLocation

?

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Spam

Email VoIP

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SPAM: Two Step Approach

People You Know:Whitelists +

Strong Identity

+

People you Don’t:The Introduction Problem

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Candidates for the Introduction Problem

Content Filtering Consent Reputation Address Obfuscation Captchas Computational Puzzles Payments At Risk Limited Use Addresses

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Conclusion

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