Deploying WiFi Telephony in the Enterprise

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  • 3
  • Deploying WiFi Telephony in the Enterprise

    1. 2. Deploying Wi-Fi Telephony in the Enterprise Ben Guderian SpectraLink Corporation
    2. 3. Enterprise Wi-Fi Telephony <ul><li>Cordless and cellular technologies are not suited for enterprise environments </li></ul><ul><ul><li>Coverage </li></ul></ul><ul><ul><li>Reliability </li></ul></ul><ul><ul><li>Telephone system integration </li></ul></ul><ul><ul><li>Cost </li></ul></ul><ul><li>Wi-Fi and VoIP technologies are lowering cost of deployment </li></ul><ul><li>Return on investment </li></ul><ul><ul><li>Soft dollars: productivity, responsiveness, customer service </li></ul></ul><ul><ul><li>Hard dollars: wiring costs, MAC </li></ul></ul>
    3. 4. Target Markets <ul><li>Vertical markets </li></ul><ul><ul><li>Compelling need for telephone communication among a mobile workforce </li></ul></ul><ul><ul><li>Return on investment based on productivity, responsiveness, and customer satisfaction </li></ul></ul><ul><li>General enterprise markets </li></ul><ul><ul><li>Opportunity to leverage economies of Wi-Fi and VoIP technologies </li></ul></ul>
    4. 5. Enterprise vs. Consumer Priorities <ul><li>Enterprise: </li></ul><ul><li>Business features </li></ul><ul><li>Investment protection </li></ul><ul><li>Security </li></ul><ul><li>Voice quality </li></ul><ul><li>Consumer: </li></ul><ul><li>Personalization </li></ul><ul><li>Obsolescence </li></ul><ul><li>Ease of use </li></ul><ul><li>Network ubiquity </li></ul>
    5. 6. Strategic Impact <ul><li>Mobility requirements </li></ul><ul><ul><li>Telephone support for mobile data device users </li></ul></ul><ul><ul><li>Enable true “mobile workplace” </li></ul></ul><ul><li>Infrastructure implementation </li></ul><ul><ul><li>Leverage investment in wireless network </li></ul></ul><ul><ul><li>Interoperability allows “best of breed” solutions </li></ul></ul><ul><li>Return on investment </li></ul><ul><ul><li>Productivity gains </li></ul></ul><ul><ul><li>Reduced downtime or lost time </li></ul></ul><ul><ul><li>Reduced wiring costs </li></ul></ul><ul><ul><li>Competitive advantages </li></ul></ul>
    6. 7. Device Decisions <ul><li>PDAs as phones </li></ul><ul><ul><li>Audio capabilities – many don’t support full-duplex audio </li></ul></ul><ul><ul><li>Acoustics – limited by form factor </li></ul></ul><ul><ul><li>Wi-Fi functionality – minimal security, no QoS, poor roaming, poor power management </li></ul></ul><ul><ul><li>Cellular functionality – not bad </li></ul></ul><ul><li>Phones as data devices </li></ul><ul><ul><li>Limited user interface, display size </li></ul></ul><ul><ul><li>OS, processor and memory limitations </li></ul></ul><ul><ul><li>Good for messaging applications </li></ul></ul><ul><li>General issues </li></ul><ul><ul><li>PBX functionality </li></ul></ul><ul><ul><li>Security </li></ul></ul><ul><ul><li>Administration and management </li></ul></ul>
    7. 8. Management and Administration Perspectives <ul><li>Enterprise Wi-Fi telephony overlaps the traditional telecom and datacom worlds </li></ul>Dumb terminal Class of service Extensions Feature assignments Application platform Security & access User assignment Frequent updates
    8. 9. Workplace Wireless Requirements <ul><li>End user </li></ul><ul><ul><li>Access to critical information </li></ul></ul><ul><ul><li>Corded voice quality throughout </li></ul></ul><ul><ul><li>Telephone switch features </li></ul></ul><ul><ul><li>Ease of use, minimal training </li></ul></ul><ul><ul><li>Workplace-sensitive ergonomics, durability </li></ul></ul><ul><li>Information Systems / Telecom </li></ul><ul><ul><li>Scalability for various applications and future expansion </li></ul></ul><ul><ul><li>Leverage existing infrastructure </li></ul></ul><ul><ul><li>Easy to maintain </li></ul></ul><ul><ul><li>Privacy and security </li></ul></ul>
    9. 10. Enterprise Wi-Fi Telephony Implementation Issues Voice quality Security Roaming Functionality Capacity
    10. 11. Wi-Fi Telephony Implementation Issues <ul><li>QoS is a must-have for Wi-Fi telephony </li></ul><ul><ul><li>Voice applications have little tolerance for delay and jitter </li></ul></ul><ul><ul><li>Availability, reliability, and quality must be nearly equivalent to wired telephones for enterprise use </li></ul></ul><ul><ul><li>QoS implementation impacts voice quality, capacity, and battery life </li></ul></ul><ul><li>QoS solutions </li></ul><ul><ul><li>SpectraLink SVP “stopgap” has broad industry support </li></ul></ul><ul><ul><li>IEEE 802.11e defines reservation and polling based mechanisms </li></ul></ul><ul><ul><li>Wi-Fi Alliance WMM is based on 802.11e drafts </li></ul></ul>Voice quality Security Roaming Functionality Capacity
    11. 12. Wi-Fi Telephony Implementation Issues <ul><li>“ All or nothing” security approach poor for voice </li></ul><ul><ul><li>Significant interruptions for authentication process during handoff </li></ul></ul><ul><ul><li>User interface and usability issues </li></ul></ul><ul><li>Good interim solutions are available </li></ul><ul><ul><li>Policy-based access control using MAC address </li></ul></ul><ul><ul><li>Separate VLAN for voice devices </li></ul></ul><ul><ul><li>Voice-friendly proprietary schemes </li></ul></ul><ul><li>Standards </li></ul><ul><ul><li>WFA’s WPA/WPA2 with pre-shared key is acceptable </li></ul></ul><ul><ul><li>Secure roaming techniques still necessary (802.11r) </li></ul></ul>Voice quality Security Roaming Functionality Capacity
    12. 13. Wi-Fi Telephony Implementation Issues <ul><li>Comprehensive coverage is critical for voice applications </li></ul><ul><ul><li>Voice devices are used everywhere – stairways, smoking areas, bathrooms, etc. </li></ul></ul><ul><ul><li>Voice users are highly-mobile </li></ul></ul><ul><li>Within the Wi-Fi network </li></ul><ul><ul><li>Roaming between wireless LAN access points must be transparent </li></ul></ul><ul><ul><li>Subnet roaming requires solution to maintain VoIP call </li></ul></ul><ul><li>To/from cellular network </li></ul><ul><ul><li>Possible with dual-radio devices </li></ul></ul><ul><ul><li>Various enterprise and carrier-based solutions available </li></ul></ul>Voice quality Security Roaming Functionality Capacity
    13. 14. Wi-Fi Telephony Implementation Issues <ul><li>Enterprise users expect business telephone functionality </li></ul><ul><ul><li>Multiple lines or extensions, display features, voicemail integration </li></ul></ul><ul><li>Enterprise telephone integration </li></ul><ul><ul><li>VoIP standards offer minimal functionality, inconsistent levels of support </li></ul></ul><ul><ul><ul><li>SIP, MGCP, H.323 </li></ul></ul></ul><ul><ul><li>Proprietary VoIP protocols offer richest functionality, but unique implementation for every switch platform </li></ul></ul><ul><ul><ul><li>Cisco SCCP, Nortel Unistim, Avaya CCMS, Mitel MiNet, etc. </li></ul></ul></ul>Voice quality Security Roaming Functionality Capacity
    14. 15. Wi-Fi Telephony Implementation Issues <ul><li>Network factors: </li></ul><ul><ul><li>Access point bandwidth </li></ul></ul><ul><ul><li>Density of access points </li></ul></ul><ul><ul><li>Reservation for data applications </li></ul></ul><ul><li>VoIP factors: </li></ul><ul><ul><li>Sampling rate </li></ul></ul><ul><ul><li>Codec </li></ul></ul><ul><ul><li>Protocol overhead </li></ul></ul><ul><li>Real-world implementation </li></ul><ul><ul><li>802.11b supports up to 12 simultaneous calls; sufficient for 30+ users in typical enterprise applications </li></ul></ul><ul><ul><li>802.11a can meet high density applications </li></ul></ul>Voice quality Security Roaming Functionality Capacity
    15. 16. Wired vs. Wireless Office Costs $50 $0 PC Wireless NIC $625 $650 TOTAL $15 ($150 per AP for 10 users) $300 ($150 each for data and phone line) Cable Installation $60 ($600 AP for 10 users) $0 Wireless Network $500 (enterprise-grade IP handset w/ accessories) $350 (enterprise-grade IP deskset) Telephone set Wireless Office Traditional Wired Office
    16. 17. Summary <ul><li>Different users need different devices </li></ul><ul><ul><li>Opportunities to innovate, exploit niches </li></ul></ul><ul><ul><li>Enterprise management issues must be considered </li></ul></ul><ul><li>Today’s Wi-Fi technology addresses enterprise challenges </li></ul><ul><ul><li>QoS, security, capacity </li></ul></ul><ul><li>Enterprise Wi-Fi and VoIP adoption will drive costs down </li></ul><ul><ul><li>Meanwhile vertical market opportunities will continue to dominate </li></ul></ul><ul><li>Standards will lower costs, drive innovation </li></ul><ul><ul><li>Network TCO will continue to drop with lower equipment cost, better management and administration </li></ul></ul><ul><ul><li>Resistance to truly open VoIP protocol will maintain current enterprise market paradigm </li></ul></ul>
    17. 18. <ul><li>Thank you </li></ul><ul><li>www.spectralink.com </li></ul>

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