Polycom H340 - Manual (Page 2)

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Deploying SpectraLink e340, h340 and i640 Wireless Telephones BEST PRACTICES GUIDE
October 2010
Table of Contents
1 Introduction ........................................................................................................................ 3
1.1 SpectraLink e340/h340/i640 Wireless Telephones......................................................................3
1.2 SpectraLink Infrastructure ............................................................................................................3
1.3 VIEW Certification Program .........................................................................................................4
2 Wireless LAN Layout Considerations .............................................................................. 5
2.1 Coverage ......................................................................................................................................5
2.1.1 Overlapping Coverage .............................................................................................................5
2.1.2 Signal Strength ........................................................................................................................7
2.2 Access Point Configuration Considerations .................................................................................8
2.2.1 Channel Selection ....................................................................................................................8
2.2.2 AP Transmission Power and Capacity ....................................................................................9
2.2.3 Interference ..............................................................................................................................9
2.2.4 Multipath and Signal Distortion ............................................................................................. 10
2.2.5 Site Surveys .......................................................................................................................... 10
2.3 Wireless Telephone Capacity ................................................................................................... 11
2.3.1 Access Point Bandwidth Considerations .............................................................................. 11
2.3.2 Push-to-Talk Multicasting Considerations ............................................................................ 12
2.3.3 Telephone Usage .................................................................................................................. 12
2.3.4 Telephony Gateway Capacity ............................................................................................... 13
3 Network Infrastructure Considerations ...........................................................................15
3.1 Physical Connections ................................................................................................................. 15
3.2 Assigning IP Addresses ............................................................................................................. 16
3.3 Software Updates Using TFTP ................................................................................................. 16
4 SpectraLink Voice Priority (SVP) .....................................................................................17
4.1.1 SVP Infrastructure ................................................................................................................. 17
4.1.2 SVP Server Capacity ............................................................................................................ 17
4.1.3 Multiple SVP Servers ............................................................................................................ 17
4.1.3.1 Scenario One ............................................................................................................... 20
4.1.3.2 Scenario Two ............................................................................................................... 20
4.1.4 DSCP for SVP Deployments ................................................................................................ 21
5 Security .............................................................................................................................23
5.1 Wired Equivalent Privacy (WEP) ............................................................................................... 23
5.2 Wi-Fi Protected Access (WPA) Personal, WPA2 Personal ...................................................... 23
5.2.1 Cisco Fast Secure Roaming (FSR) ...................................................................................... 23
5.3 Using Virtual LANs .................................................................................................................... 23
5.4 MAC Filtering and Authentication .............................................................................................. 23
5.5 Firewalls and Traffic Filtering .................................................................................................... 24
5.6 Virtual Private Networks (VPNs) ............................................................................................... 24
5.7 Diagnostic Tools ........................................................................................................................ 25
6 Subnets, Network Performance and DHCP .....................................................................26
6.1 Subnets and Telephony Gateway Interfaces ............................................................................ 26
6.2 Subnets and IP Telephony Server Interfaces ........................................................................... 26
6.3 Network Performance Requirements ........................................................................................ 27
6.4 DHCP Requirements ................................................................................................................. 28
7 Conclusion ........................................................................................................................30