Table Of Contents - Polycom SpectraLink 8020 Deployment Manual

Deploying SpectraLink 8020/8030
Wireless Telephones
July 2009
1 Introduction ........................................................................................................................ 3
1.1 SpectraLink Wi-Fi Release 3.0 ......................................................................................................4
1.2 SpectraLink 8020/8030 Wireless Telephones ...............................................................................4
1.3 SpectraLink Infrastructure .............................................................................................................4
1.4 VIEW Certification Program ...........................................................................................................4
2 Wireless LAN Layout Considerations .............................................................................. 6
2.1 Coverage .......................................................................................................................................6
2.1.1 Overlapping Coverage ...............................................................................................................6
2.1.2 Signal Strength ..........................................................................................................................8
2.2 802.11b/g Deployment Considerations .........................................................................................9
2.3 802.11a Deployment Considerations ......................................................................................... 10
2.4 Access Point Configuration Considerations ............................................................................... 10
2.4.1 Channel Selection ................................................................................................................... 10
2.4.2 AP Transmission Power and Capacity ................................................................................... 13
2.4.3 Interference ............................................................................................................................. 14
2.4.4 Multipath and Signal Distortion ............................................................................................... 14
2.4.5 Site Surveys ............................................................................................................................ 15
2.5 Wireless Telephone Capacity ..................................................................................................... 16
2.5.1 Access Point Bandwidth Considerations ................................................................................ 16
2.5.2 Push-to-Talk Multicasting Considerations .............................................................................. 17
2.5.3 Telephone Usage ................................................................................................................... 18
2.5.4 Telephony Gateway Capacity ................................................................................................. 19
3 Network Infrastructure Considerations .......................................................................... 20
3.1 Physical Connections .................................................................................................................. 20
3.2 Assigning IP Addresses .............................................................................................................. 21
3.3 Software Updates Using TFTP ................................................................................................... 22
RADIUS AAA Servers - Authentication, Authorization, and Accounting ................................... 22
3.4
3.5 NTP Server ................................................................................................................................. 23
4 Quality Of Service (QoS) ................................................................................................. 24
4.1 SpectraLink Voice Priority (SVP) ................................................................................................ 24
4.1.1 SVP Infrastructure .................................................................................................................. 24
4.1.2 SVP Server Capacity .............................................................................................................. 24
4.1.3 Multiple SVP Servers .............................................................................................................. 25
4.1.3.1 Scenario One .................................................................................................................. 27
4.1.3.2 Scenario Two .................................................................................................................. 28
4.1.4 DSCP for SVP Deployments .................................................................................................. 29
4.2 Wi-Fi Standard QoS.................................................................................................................... 29
4.2.1 WMM....................................................................................................................................... 30
4.2.2 WMM Power Save .................................................................................................................. 31
4.2.3 WMM Admission Control ........................................................................................................ 32
4.2.4 DSCP for Wi-Fi Standard QoS Deployments ......................................................................... 33
4.3 Cisco Client Extensions, Version 4 (CCXv4) .............................................................................. 34
5 Security ............................................................................................................................ 35
5.1 VoWLAN and Security ................................................................................................................ 35
5.2 Wired Equivalent Privacy (WEP) ................................................................................................ 35
5.3 Wi-Fi Protected Access (WPA) ................................................................................................... 35
©2009 Polycom, Inc. All rights reserved.
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