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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
333© 2004 Cisco Systems, Inc. All rights reserved.
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
555© 2004 Cisco Systems, Inc. All rights reserved.
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)
666© 2004 Cisco Systems, Inc. All rights reserved.
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
131313© 2004 Cisco Systems, Inc. All rights reserved.
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
141414© 2004 Cisco Systems, Inc. All rights reserved.
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)
151515© 2004 Cisco Systems, Inc. All rights reserved.
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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