1© 2004 Cisco Systems, Inc. All rights reserved.

In-Building Wireless Conference – Feb.’04

“DUAL-MODE” WIRELESS TELEPHONY:THE CONVERGENCE OF VoIP + WI-FI + CELLULAR

ERIC BLAUFARB

Marketing Manager

Wireless Networking Business Unit

Cisco Systems

EDUCAUSE

October 19th, 2004

222© 2004 Cisco Systems, Inc. All rights reserved.

In-Building Wireless Conference – Feb.’04

Agenda

• What is Driving VoIP & Cellular convergence

• What is “Dual-Mode” Wireless Telephony?

• Cisco influence on “Dual-Mode”

• Technical Challenges

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In-Building Wireless Conference – Feb.’04

Market Growth:IP Telephony & Wireless LAN

Wireless LAN Growth

IP Telephony Growth

IP PBX Lines – U.S.

0

10M

20M

30M

1999 2000 2001 2002

11%2003

20%2004

30%2005

43%2006

58%Source: Phillips Infotech, 2002

% IP Phones

Source: Forward Concepts, 2003

$B

illi

on

s

444© 2004 Cisco Systems, Inc. All rights reserved.

In-Building Wireless Conference – Feb.’04

Dual-Mode in Different Environments

• Home – As reliability for VoIP increase through providers such as Vonage the expectation is WLAN is a logical extension – Linksys to leverage technology

• Enterprise Campus – As wired VoIP infrastructures become pervasive and dual mode cellular becomes a “non-purchase decision” organizations will logically begin to support VoIP over WLAN as an inexpensive mobility enhancement

• Small Business / Branch Office – Branch office provides the greatest benefit for VoIP convergence and WLAN/VoIP integration. Decrease the complexities of wired networks , drives down OPEX & CAPEX costs provides increased facility flexibility & provides greater freedom for employees

• Hotspots – Least likely to have immediate benefits from VoIP/WLAN convergence

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In-Building Wireless Conference – Feb.’04

Dual-Mode Wireless Telephony:Value Proposition – Education

– Dual-mode cellular phones expected to be upgraded more often than desktop PBX phones

– Extra expense for enterprise calls received while off-campus (these calls will be automatically routed over the cellular network instead of going to your PBX voicemail)

+ Mobility (a cordless phone for the office)+ Fewer devices to carry around+ Enhanced in-building wireless coverage+ Lowered OPEX costs+ Increased Productivity, Increased Responsiveness+ Largest Deployments are University Medical Centers (cellular

restrictions)+ Increase University Public Safety+ Access to voice supplementary services and integrated data applications

Corporate DirectoryCalendarInstant Messaging

+ Single wired/wireless network for voice & data (reduced IT costs)

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In-Building Wireless Conference – Feb.’04

Single-Mode vs. Dual-Mode Phones

• Available today• Provides

mobility within campus environmnets

• Future• Can be used both

inside and outside the enterprise

Where will these products fit within your organization?• Single mode = Vertical applications• Dual Mode = Standard Horizontal

•Dual mode devices drive infrastructure deployments•User driven adoption less demanding as alternative technology is in place•CAPEX justification and applications will drive adoption

Single-Mode (Wi-Fi only) Dual-Mode (Wi-Fi + Cellular)

777© 2004 Cisco Systems, Inc. All rights reserved.

In-Building Wireless Conference – Feb.’04

“Dual-Mode” Wireless Telephony Evolution

Dual-Mode Wireless

Telephony

WLAN

+IP

TelephonyWLAN VoIPTelephony

Traditional Cellular

888© 2004 Cisco Systems, Inc. All rights reserved.

In-Building Wireless Conference – Feb.’04

Breakthrough Form FactorsDual Mode Wi-Fi & Cellular Integration

• http://www.cisco.com/go/ciscocompatible/wireless

Q4/04

Q4/04

Nokia 9500 Communicator

802.11b CCX for Data

999© 2004 Cisco Systems, Inc. All rights reserved.

In-Building Wireless Conference – Feb.’04

Cisco Compatible Extensions VoWLAN Features

Available Today (CCX v2/v3):• Fast Secure Layer 2 Roaming (LEAP, EAP-FAST)

• Fast Secure Layer 3 Roaming (LEAP, EAP-FAST)

• Transmit Power SyncReduces interference, Improves talktime

• Proxy ARP Information ElementImproves standby battery life

• Pre-standard QoS

Roadmap(CCX v4):• WMM Standards-based QoS

• Call Admission Control

• Troubleshooting Tools

• UPSDImproves talktime battery life

• Fast Secure Roaming with additional EAP types

These features are included in

CCX

These features are included in

CCX

101010© 2004 Cisco Systems, Inc. All rights reserved.

In-Building Wireless Conference – Feb.’04

CCX v2.0 v3.0 CCX v4 Features

Voice Enhancements

• UPSD

• TSPEC

• CAC

• Voice Matrix

Security

• PEAP with EAP-GTC

• Standard TKIP with LEAP and PEAP/GTC

• EAP-FAST

• CCKM with EAP-FAST

• AES

• CCKM with TLS, PEAP-GTC, PEAP-MS-CHAP

• Network Admission Control

• EAP-FAST Enhancements

VLANs and QoS

• Multiple SSIDs/VLANs on AP

• Pre-standard eDCF

• WiFi QoS WME

• SSIDL/MBSSID

Performance and Management

• AP-assisted roaming

• Fast 802.1X reauthentication

• Radio environment reporting

• Transmit power control

• CCX version control

• Single Signon

• Proxy ARP

• L2 Roaming Enhancements

• Client Enhancement

111111© 2004 Cisco Systems, Inc. All rights reserved.

In-Building Wireless Conference – Feb.’04

In the Future, There Will Be Many VoWLAN Devices

Desktop IP Phone with 802.11

Ethernet Client

802.11 Phone

PDA/Phone

Laptop with Softphone

802.11 Voice Client

Data Collection Device with Softphone

Dual-Mode 802.11Cellular Phone

Multiple ProductsMultiple Form Factors

Multiple Vendors

All Made“Cisco-Compatible”

through CCX

Multiple ProductsMultiple Form Factors

Multiple Vendors

All Made“Cisco-Compatible”

through CCX

121212© 2004 Cisco Systems, Inc. All rights reserved.

In-Building Wireless Conference – Feb.’04

Technical Challenges

Security

Call Quality

Mobility

Battery Life

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In-Building Wireless Conference – Feb.’04

What are the requirements to support VoIP convergence?

• Good Voice Quality• Security• Fast Roaming• Ubiquitous Coverage• Scalability• Long Battery Life• Troubleshooting Tools• Minimal RF Interference

Centralized Servers

CiscoWorks WLSEACS

Switches

Edge Switches Cat 6500 Series WLSM

WirelessAccessPoints

AP1200 AP1100BR1300

Cisco SWAN

• Voice + Data• Wired + Wireless• Enterprise Features

ONE NETWORK

Cisco-brand & Cisco-CompatibleClients

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In-Building Wireless Conference – Feb.’04

Fast Secure Layer 2 Roaming

CentralAuthentication

Server

SiSi

Security

+

Mobility

+

Call Quality

WAN Link

*WDS

*WDS = Wireless Domain Server (Local Authentication Server + Access Point)

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In-Building Wireless Conference – Feb.’04

Fast, Secure L3 RoamingRequired service for reliable VoIP

1. APs and clients authenticate via central WLSM ModuleCiscoWorks WLSE

CiscoSecure ACS

3. Support >300 AP’s

2. Clients securely Fast Layer 3 roam (<50 ms handoff times)

10.1.1.1

4. Support >2000 VoIP clients

RM

RM

RM

161616© 2004 Cisco Systems, Inc. All rights reserved.

In-Building Wireless Conference – Feb.’04

Deploying VoWLAN:Recommendations & Best Practices

• VLANs – Voice should be on a separate VLAN from data

• AP Coverage – VoWLAN phones, which are used while the user is in motion, can expose coverage “holes”

• Interference – Voice apps won’t perform well if there is a lot of AP-to-AP interference, so a good site survey is important

• Capacity – To ensure sufficient voice call capacity, plus support data traffic, you may need more AP’s, and will want to use 56 Mbps protocols like 802.11a & 802.11g

• 802.11a Upgradability – Many future VoWLAN devices will use .11a or .11a/b/g radios (more capacity, more channels), so be sure your network can be upgraded to 802.11a/b/g

To run voice over your WLAN, now or in the future, here are some things to consider as you design/deploy your WLAN network:

Cisco White Paper: “Cisco Wireless IP Phone 7920 Deployment Recommendations”http://wwwin.cisco.com/eag/wnbu/tech_resources/white_papers.shtml

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