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Deploying WiFi Telephony in the Enterprise

Deploying WiFi Telephony in the Enterprise






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Deploying WiFi Telephony in the Enterprise Deploying WiFi Telephony in the Enterprise Presentation Transcript

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