Avaya WLAN IP Telephony Configuration Guide
WLAN IP Telephony Installation and
Configuration Guide
Avaya Business Communications Manager
Document Status: Standard
Document Number: NN40010-303
Document Version: 02.0
Date: May 2010
2
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Contents
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 1
Getting started with WLAN IP telephony . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
About this guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Symbols and text conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Related publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Getting technical documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Getting product training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Getting help from a distributor or reseller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Getting technical support from the Avaya Web site . . . . . . . . . . . . . . . . . . . . . . . 13
Contents 3
Chapter 2
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Wireless telephone network description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Call Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
DHCP Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Firewall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
WLAN Handset 2210, WLAN Handset 2211, and
WLAN Handset 2212 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Wi-Fi Multimedia (WMM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Wired Equivalent Privacy (WEP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Wi-Fi Protected Access (WPA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Wi-Fi Protected Access2 (WPA2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Virtual Private Network (VPN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Push-to-talk feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Loud noise environments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
WLAN IP Telephony Manager 2245 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
WLAN Application Gateway 2246 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Access Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Handset switchover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Loss of signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
WLAN IP Telephony Installation and Configuration Guide
4 Contents
Chapter 3
Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DHCP server planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
TFTP Server planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Syslog Server planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
AP planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Site survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Conducting an effective site survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Example of AP placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Solving coverage issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Solving overlap issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Network planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
WLAN IP Telephony Manager 2245 planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Installation requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
WLAN IP Telephony Manager 2245 groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Gateway and timing function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Multicast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
WLAN Application Gateway 2246 planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Installation requirements for the WLAN IP Telephony Manager 2245
and the WLAN Application Gateway 2246 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
IP address planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
IP addressing with DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Planning worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Chapter 4
System information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Bandwidth management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Zones for wireless handsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Call blocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Codecs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
RLR and SLR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
RTCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Gain adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Programmable rings and tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
In/Out of Service tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Local mode display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Survivable Remote Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
External Applications Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
End-to-end QoS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
NAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
NN40010-303NN40010-303
Contents 5
NAT Traversal feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Network configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
WLAN IP Telephony Manager 2245 in a NAT environment . . . . . . . . . . . . . . . . . 44
Wireless Access Point 2230/2270 in a NAT Environment . . . . . . . . . . . . . . . . . . 45
DHCP Server location in a NAT environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
TFTP Server location in a NAT environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
CS 1000 and Meridian 1 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
IP Phone 2004 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Chapter 5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Required materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Supplied equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Pre-installation checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Installing the WLAN IP Telephony Manager 2245 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
About the front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Wall mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Rack-mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Connecting to the LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Connecting to the power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Installing the WLAN Application Gateway 2246 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Chapter 6
WLAN IP Telephony Manager 2245 configuration . . . . . . . . . . . . . . . . . . . 53
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Configuration tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Connecting to the WLAN IP Telephony Manager 2245 . . . . . . . . . . . . . . . . . . . . . . . . 55
Through a serial port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Through Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Configuring the network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Saving the configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Changing the master IP address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Configuring the WLAN IP Telephony Manager 2245 . . . . . . . . . . . . . . . . . . . . . . . . . 60
Changing the password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Chapter 7
WLAN Handset configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
System provisioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Configuring the handset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Configuring the handset using the configuration cradle . . . . . . . . . . . . . . . . . . . . 65
Opening and using the Admin menu on the handset . . . . . . . . . . . . . . . . . . . . . . 66
Admin menu options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
License Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
WLAN IP Telephony Installation and Configuration Guide
6 Contents
Terminal Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
OAI On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Push-to-talk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Admin Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
IP Addresses menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
ESSID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Reg. (Regulatory) Domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Transmit Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Run Site Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Diagnostics Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Syslog Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Restore Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Downloading the wireless handset software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Pre-download checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Downloading the software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
IP Phone 2004 mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Voice Messaging Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Codecs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
TFTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Feature programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Feature and key assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Program keys on the wireless handset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Configuration cradle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Using the configuration cradle and software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Planning the configuration files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Configuration cradle software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Reading and saving a handset configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Testing the wireless handsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Diagnostic Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Run Site Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Diagnostics Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Syslog Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Site certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Testing signal strength with the handset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Push-to-talk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
PTT operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
User-defined preferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Configuration cradle worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
NN40010-303NN40010-303
Contents 7
Chapter 8
Administration and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Adding a WLAN IP Telephony Manager 2245 to the system . . . . . . . . . . . . . . . . . . 111
Checking in to the Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Replacing a WLAN IP Telephony Manager 2245 . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Failed master WLAN IP Telephony Manager 2245 . . . . . . . . . . . . . . . . . . . . . . . 111
Replacing the failed WLAN IP Telephony Manager 2245 . . . . . . . . . . . . . . . . . . 111
Removing a WLAN IP Telephony Manager 2245 from the system . . . . . . . . . . . . . . 112
Wireless handset scenarios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Changing the master WLAN IP Telephony Manager 2245 . . . . . . . . . . . . . . . . . . . . 113
Viewing software version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
For the WLAN IP Telephony Manager 2245 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
For the WLAN Application Gateway 2246 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
For a wireless handset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Updating software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Updating software on the WLAN IP Telephony Manager 2245 . . . . . . . . . . . . . 115
Updating software on the WLAN Application Gateway 2246 . . . . . . . . . . . . . . . 116
Updating software on a wireless handset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Wireless handset download messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Normal download messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Download failure or recovery messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Chapter 9
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Troubleshooting the WLAN IP Telephony Manager 2245 . . . . . . . . . . . . . . . . . . . . . 119
Error Status screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Network Status screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Software Version Numbers screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Speed or duplex mismatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Troubleshooting the WLAN Application Gateway 2246 . . . . . . . . . . . . . . . . . . . . . . . 123
Troubleshooting the handset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Context . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Access Point problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Configuration problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Duplex mismatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
No ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Far-end echo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Dropped calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Wireless handset status messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Using Call Server overlay commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
LD 32 IDU command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
WLAN IP Telephony Installation and Configuration Guide
8 Contents
LD 32 STAT command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
LD 117 Inventory command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
LD 117 STIP command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
TPS CLI commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Determining alias IP addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Troubleshooting coverage issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Before calling Avaya Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
WLAN Application Gateway 2246 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
System overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Third-party applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Nurse-call systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Installing with a new system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Installing in an existing system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Configuring the WLAN Application Gateway 2246 IP address . . . . . . . . . . . . . . 148
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Navigating the Administration console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Task summary list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Connecting to the Application Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Continuing configuration through Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Connecting through Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Configuring the Telephone Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Deleting a handset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Searching for a handset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Programming a feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Setting or changing a password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Viewing system status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Viewing network status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Viewing Telephone Line Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Viewing software versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
WLAN Application Gateway 2246 certification . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Wireless handset certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Updating software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Software updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
TFTP software updates Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Planning Worksheet for Handsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Freeing the serial port for administrative purposes . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Compatible Access Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
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Chapter 1
Getting started with WLAN IP telephony
This document is a global document. Contact your system supplier or your Avaya representative to
verify that the hardware and software described are supported in your area.
This section contains information on the following topics:
• “About this guide” on page 9
• “Related publications” on page 12
• “Customer Service” on page 13
About this guide
This document describes the planning, installation, configuration, maintenance, and
troubleshooting for the WLAN system, including the following elements:
• WLAN IP Telephony Manager 2245
• WLAN Application Gateway 2246 (optional)
• WLAN Handset 2210
• WLAN Handset 2211
• WLAN Handset 2212
9
Audience
This guide is intended for planners and installers of WLAN systems, as well as for individuals
responsible for configuring, maintaining, and troubleshoooting the WLAN system.
Acronyms
The following is a list of acronyms used in this guide.
Table 1
Acronym Description
AP Access point
AES Advanced Encryption Standard
BB Best bandwidth
Avaya BCM Avaya Business Communications Manager
BQ Best quality
CFNA Call Forward No Answer
WLAN IP Telephony Installation and Configuration Guide
10 Chapter 1 Getting started with WLAN IP telephony
Table 1
Acronym Description
CRC Cyclic redundancy check
DHCP Dynamic Host Configuration Protocol
DNS Domain name services
DS Direct sequence
DSSS Direct sequence spread spectrum
ESSID Extended service set identifier
FH Frequency hopping
FSR Fast secure roaming
LAN Local area network
LTPS Line telephone proxy server
NAT Network address translation
OAI Open application interface
PSK Pre-shared key
PTT Push-to-Talk
QoS Quality of Service
RLR Radio frequency
RLR Receive loudness rating
RTCP Real-time Transport Control Protocol
SLR Send loudness rating
SNMP Simple Network Management Protocol
SRG Survivable Remote Gateway
SSC Small system controller
SVP SpectraLink voice prioritization
TFTP Trivial File Transfer Protocol
VPN Virtual private network
WEP Wired equivalent privacy
WLAN Wireless local area network
WMM Wi-Fi multimedia
WNS Window name services
WPA2 Wi-Fi protected access2
WPA Wi-Fi protected access
WSS Wireless security switch
NN40010-303NN40010-303
Chapter 1 Getting started with WLAN IP telephony 11
Symbols and text conventions
These symbols are used to highlight critical information for the BCM50 system:
Caution: Alerts you to conditions where you can damage the equipment.
Danger: Alerts you to conditions where you can get an electrical shock.
Warning: Alerts you to conditions where you can cause the system to fail or work
improperly.
Note: A Note alerts you to important information.
Tip: Alerts you to additional information that can help you perform a task.
Security note: Indicates a point of system security where a default should be changed,
or where the administrator needs to make a decision about the level of security required
!
for the system.
Warning: Alerts you to ground yourself with an antistatic grounding
strap before performing the maintenance procedure.
Warning: Alerts you to remove the BCM50 main unit and expansion
unit power cords from the ac outlet before performing any maintenance
procedure.
WLAN IP Telephony Installation and Configuration Guide
12 Chapter 1 Getting started with WLAN IP telephony
These conventions and symbols are used to represent the Business Series Terminal display and
dialpad.
Convention Example Used for
Word in a special font (shown in
the top line of the display)
Underlined word in capital letters
(shown in the bottom line of a two
line display telephone)
ïïïï ï
ïïïï
Command line prompts on display telephones.
Display option. Available on two line display
telephones
option on the display to proceed.
you press on the to select a particular option.
. Press the button directly below the
These text conventions are used in this guide to indicate the information described:
Convention Description
bold Courier
text
Indicates command names and options and text that you need to enter.
Example: Use the
Example: Enter
info command.
show ip {alerts|routes}.
italic text Indicates book titles
plain Courier
text
FEATURE
HOLD
Indicates command syntax and system output (for example, prompts
and system messages).
Example:
Set Trap Monitor Filters
Indicates that you press the button with the coordinating icon on
whichever set you are using.
RELEASE
separator ( > ) Shows menu paths.
Related publications
Related publications are listed below. To locate specific information, you can refer to the
Master Index for your product documentation suite.
WLAN Handset 2210/2211/2212 User Guide
IP Line: Description, Installation, and Operation (553-3001-365)
NN40010-303NN40010-303
Example: Protocols > IP identifies the IP option on the Protocols
menu.
Customer Service
Visit the Avaya Web site to access the complete range of services and support that Avaya
provides. Go to www.avaya.com or go to one of the pages listed in the following sections.
Navigation
• “Getting technical documentation” on page 13
• “Getting product training” on page 13
• “Getting help from a distributor or reseller” on page 13
• “Getting technical support from the Avaya Web site” on page 13
Getting technical documentation
To download and print selected technical publications and release notes directly from the Internet,
go to www.avaya.com/support.
Getting product training
Chapter 1 Getting started with WLAN IP telephony 13
Ongoing product training is available. For more information or to register, you can access the Web
site at www.avaya.com/support. From this Web site, you can locate the Training contacts link on
the left-hand navigation pane.
Getting help from a distributor or reseller
If you purchased a service contract for your Avaya product from a distributor or authorized
reseller, contact the technical support staff for that distributor or reseller for assistanceGetting
product training
Getting technical support from the Avaya Web site
The easiest and most effective way to get technical support for Avaya products is from the Avaya
Technical Support Web site at www.avaya.com/support.
WLAN IP Telephony Installation and Configuration Guide
14 Chapter 1 Getting started with WLAN IP telephony
NN40010-303NN40010-303
Chapter 2
Overview
Wireless telephone network description
The WLAN wireless telephone network consists of the following components:
• Call Server
• DHCP server
• Trivial File Transfer Protocol (TFTP) server
•Firewall
• WLAN Handset 2210, WLAN Handset 2211 and WLAN Handset 2212
• WLAN IP Telephony Manager 2245
• WLAN Application Gateway 2246 (optional)
• Access Point (AP) — one or more as required by the site
15
Call Server
The Call Server can be the Call Server of a Business Communications Manager system running
Avaya BCM software.
DHCP Server
The existing DHCP Server can be on either side of the firewall, according to the site
administrator’s preference. The DHCP server is optional if the wireless handsets and WLAN IP
Telephony Manager 2245 are statically configured.
TFTP Server
A TFTP Server is required in an IP Telephony system to distribute software to the wireless
handsets and WLAN IP Telephony Manager 2245. It can reside on a different subnet than the Call
Server and APs. The TFTP Server can be located on either side of the firewall.
Firewall
The firewall is an optional element that is often used to separate the wireless and wired domains.
WLAN IP Telephony Installation and Configuration Guide
16 Chapter 2 Overview
WLAN Handset 2210, WLAN Handset 2211, and WLAN Handset 2212
The WLAN Handset 2210, WLAN Handset 2211 and WLAN Handset 2212 use Voice over IP
(VoIP) technology on IEEE 802.11-compliant Wireless Local Area Networks (WLAN). APs use
radio frequencies to transmit signals to and from the wireless handsets.
Note: In this document, handsets means the WLAN Handset 2210, WLAN
Handset 2211, and WLAN Handset 2212. Where the feature refers only to a
specific handset, the full handset name is used.
Employees carry wireless handsets to make and receive calls as they move throughout the
building. The handsets are used only on the premises; they are not cellular phones. The handsets
communicate with the Avaya CS 1000 or Meridian 1 system and with the WLAN IP Telephony
Manager 2245. Just like wired telephones, the wireless handsets receive calls directly, receive
transferred calls, transfer calls to other extensions, and make outside and long-distance calls
(subject to corporate restrictions).
The handsets interoperates with other IP Line and IP Trunk features and devices, such as IP Peer,
and the Avaya IP Phone 20xx and Avaya IP Softphone 2050 series of IP Phones, with the
exception of some media-related constraints described in “Codecs” on page 39.
The radio frequencies use spread spectrum radio technology, that comes in two variations:
• direct sequence (DS)
• frequency hopping (FH)
The handsets use DS spread spectrum radio technology to optimize bandwidth and minimize jitter
on the WLAN. The wireless handsets are not compatible with FH.
The handsets on an 802.11a/b/g network operate at a transmission rate of up to 11 Mb/s in a direct
sequence spread spectrum (DSSS) system.
Language
The handset menus and screens that originate from the Call Server are displayed in the languages
supported on the Call Server. The administration and configuration menus, and all other local
handset prompts are English-only.
Licenses
The handset appears to the Call Server as a standard IP Phone 2004. Therefore, each wireless
handset requires one IP User License and is subject to the same feature packaging requirements as
the existing IP Phone 2004.
NN40010-303NN40010-303
Wi-Fi Multimedia (WMM)
The handsets support basic Wi-Fi Multimedia (WMM) to improve Quality of Service (QoS), as
defined in the 802.11e specification. WMM provides prioritized QoS capability when concurrent
applications, each with unique latency requirements, are competing for network resources.
When WMM is used, all voice traffic originating from the wireless handset is assigned the WMM
Voice Access Category, making it the highest priority application. If the wireless network supports
WMM, the handsets enable WMM support automatically; otherwise, SpectraLink voice
prioritization (SVP) is used.
Wired Equivalent Privacy (WEP)
The handsets support Wired Equivalent Privacy (WEP) as defined by the 802.11a/b/g
specification. Avaya offers the product with both 40-bit and 128-bit encryption. WEP increases the
security of the wireless LAN to a level similar to a wired Ethernet LAN.
Wi-Fi Protected Access (WPA)
Chapter 2 Overview 17
The handsets support Wi-Fi Protected Access (WPA) using Pre-Shared Key (PSK), as defined by
the 802.11i specification. WPA increases the security of the wireless LAN, using key encryption,
key rotation, authentication and message integrity checking.
Wi-Fi Protected Access2 (WPA2)
The handsets support Wi-Fi Protected Access2 (WPA2) using PSK and Advanced Encryption
Standard (AES), as defined by the 802.11i specification. WPA2 increases the security of the
wireless LAN, using key encryption, key rotation, data encryption, authentication and message
integrity checking.
Virtual Private Network (VPN)
The WLAN Handset 2212 supports Virtual Private Network (VPN) security. VPN security
provides a secure tunnel for the transfer of unencrypted information. A two-phase approach is used
to negotiate the tunnel, with Phase 1 protecting Phase 2. Phase 1 uses pre-shared keys,
Diffie-Hellman group, hashing, and encryption. Phase 2 uses hashing and encryption. Both phases
have limited, configurable lifetimes.
Push-to-talk feature
The Push-to-talk (PTT) feature allows the WLAN Handset 2211 to operate in a PTT
group-broadcast mode like a two-way radio, in addition to the standard telephone operation.
For more information, see “Push-to-talk” on page 107.
WLAN IP Telephony Installation and Configuration Guide
18 Chapter 2 Overview
Loud noise environments
The handsets are designed to provide optimal voice quality. However, when used in extremely
loud noise environments, (for example, close to working heavy machinery), degradation in call
quality may be experienced due to echo. Avoid using the handsets in loud noise environments
WLAN IP Telephony Manager 2245
The WLAN IP Telephony Manager 2245 is a device that manages IP telephony network traffic on
the WLAN system. It is required to utilize the 11 Mb/s maximum transmission speed available in
the handsets. The WLAN IP Telephony Manager 2245 acts as a proxy for the wireless handsets. It
provides a number of services including a QoS mechanism, AP bandwidth management, and
efficient RF link utilization.
The WLAN IP Telephony Manager 2245 works with the APs to provide QoS on the WLAN. All
voice packets are encapsulated by the wireless handsets. The encapsulated voice packets to and
from the wireless handsets are handled by the WLAN IP Telephony Manager 2245 and routed to
and from a Call Server.
SpectraLink Voice Priority is the QoS mechanism implemented on the wireless handsets and APs
to enhance voice quality over the wireless network. SVP gives preference to voice packets over
data packets on the wireless medium, increasing the probability that all voice packets are
transmitted and with minimum delay. SVP is fully compliant with the IEEE 802.11 and 802.11a/b/
g standards.
Each subnet where the wireless handsets will operate requires at least one WLAN IP Telephony
Manager 2245. One unit can process 80 simultaneous calls. If greater capacity is required, multiple
units can be used in a master-slave arrangement.
WLAN Application Gateway 2246
The WLAN Application Gateway 2246 is an optional device that enables third-party applications
to communicate directly with up to 10,000 wireless handsets. The WLAN Application Gateway
2246 is connected to the LAN Ethernet switch through an RJ-45/CAT5 cable.
For more information on the WLAN Application Gateway 2246, see Appendix A, “WLAN
Application Gateway 2246.
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A WLAN Application Gateway 2246 supports 64 to 10,000 wireless handsets, depending on the
model of Gateway, as listed in Table 1.
Table 1 WLAN Application Gateway 2246 models and capacities
Model number Maximum number of users
NTTQ65AA 64
NTTQ65BA 128
NTTQ65CA 256
NTTQ65DA 512
NTTQ65EA 1024
NTTQ65FA 10000
Access Points
802.11a/b/g APs provide the connection between the wired Ethernet LAN and the wireless
(802.11) LAN. APs must be positioned in all areas where the wireless handsets will be used. The
number and placement of APs affects the coverage area and capacity of the wireless system.
Typically, the requirements for use of handsets are similar to that of other wireless data devices.
Chapter 2 Overview 19
The APs must be either SVP-compliant or WMM-compliant to support QoS. For a list of
supported APs, see Appendix B, “Compatible Access Points.
Handset switchover
When a user on an active call is moving about, the call switches from AP to AP in the subnet. This
changeover is transparent to the user.
Loss of signal
If a wireless handset is out of range of all APs, it waits 20 seconds for a signal to return. If a signal
is not re-acquired within 20 seconds, the wireless handset loses connection to the Call Server and
any calls are dropped. When the wireless handset comes back into range of an AP, it re-establishes
a connection to the Call Server and goes through the system registration process.
If a wireless handset is out of contact with the system for four seconds (worst case scenario) when
the UNIStim messaging is occurring, then a UNIStim failure could result, causing the wireless
handset to lose the UNIStim association with the Line Telephony Proxy Server (LTPS).
WLAN IP Telephony Installation and Configuration Guide
20 Chapter 2 Overview
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Chapter 3
Planning
DHCP server planning
The handset IP-related parameters can be configured manually or through a DHCP server (RFC
1541 and RFC 1533). Any DHCP server can be used, but it must support the following
capabilities.
Note: There is no partial DHCP mode, as there is with an IP Phone 2004.
Therefore, the DHCP server must support the options marked with a “*”.
• * Provide Client IP address
• * DHCP Option 1 – Subnet Mask
• * DHCP Option 3 – Default Gateway
• * DHCP Option 60 – Class Identifier. The wireless handsets use the Class Identifier of “
221x-A”. The DHCP server can use the string in the Class Identifier to uniquely identify a
wireless handset.
• * DHCP Option 66. This can be used to specify the address of the TFTP Server. If this
option is not configured, the wireless handset looks at the Next server/ Boot server (siaddr)
Option for the address of the TFTP Server* Vendor Specific Option 43, 128, 144, 157,
191, or 251. Only one of these options is required. The DHCP server encodes the Server 1
information using the same format as the IP Phone 2004. If the Server 2 information is
also present in the option, it is ignored.
• * DHCP Option 151. This option contains the IP address of the WLAN IP Telephony
Manager 2245. If Option 151 is not configured, the wireless handset performs a DNS
lookup of the name “SLNKSVP2”, if Options 6 (DNS Server) and 15 (Domain Name) are
configured.
• DHCP Option 152. If an optional WLAN Application Gateway 2246 is used in the system,
its IP address can be specified with this option.
21
Each wireless handset effectively uses two IP addresses in the wireless subnet: one for the physical
wireless handset and a second alias IP address that is used on the WLAN IP Telephony Manager
2245. When allocating addresses in a subnet scope on the DHCP server, a contiguous block of IP
addresses as large as the number of wireless handsets supported must be marked as unavailable for
distribution for other uses by the DHCP server.
When multiple WLANs are connected to a single wireless security switch (WSS), the DHCP
server can require specific configuration modifications. Please refer to the documentation for the
specific WSS being used for any special DHCP configuration requirements.
WLAN IP Telephony Installation and Configuration Guide
22 Chapter 3 Planning
TFTP Server planning
A TFTP Server (RFC1350) holds the software images for updating the handsets and the WLAN IP
Telephony Manager 2245. When the IP address of the TFTP server has been configured on the
wireless handset, each time a wireless handset is powered on, the wireless handset checks its
version of firmware against the firmware on the TFTP Server, and if the version is different, the
wireless handset downloads the new firmware from the TFTP Server. Similarly, when a WLAN IP
Telephony Manager 2245 reboots, or is manually reset by the operator, it checks its version of
software against the version on the TFTP Server. If the versions are different, the WLAN IP
Telephony Manager 2245 downloads the new software.
The following information must be considered when planning for a TFTP Server:
• The process for the wireless handset to check its version of firmware against what is
available on the TFTP Server takes less than two seconds on a quiet network.
• If the TFTP Server is offline or unreachable, the wireless handset tries for about 10
seconds before giving up and using its existing version of firmware.
• The wireless handset firmware downloading process takes about 30 seconds.
• The TFTP Server must be capable of supporting multiple TFTP sessions.
• When a wireless handset makes a TFTP request, it uses file names without a full path
name. Therefore, software updates for the WLAN IP Telephony Manager 2245 and
handsets must be installed into the root directory of the TFTP Server.
When the software files are uploaded to the TFTP server. they must be unzipped. Allow time for
the TFTP server to refresh and be aware of the files before attempting to download software to the
wireless handsets and WLAN IP Telephony Manager 2245. Monitor the TFTP Server for any
errors.
The TFTP Server can be located anywhere on the network if the wireless handsets have the subnet
mask and default IP gateway configured correctly. However, the wireless handset expects a
response within two seconds to any TFTP request. Therefore, the TFTP Server should not be
located, for example, at the other end of a slow WAN link.
If too many wireless handsets are attempting to download new software simultaneously, the
downloads can slow down or return error messages. To reduce the number of retries and error
messages, manage the download process by staggering the times the wireless handsets download
the software.
Avaya has tested the following TFTP servers. They are listed in order of preference.
• TFTP server (ONMS application)
• 3COM TFTP
• PumpkinTFTP
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Syslog Server planning
A Syslog Server listens for incoming syslog messages on UDP port 514 and then processes the
messages according to local administrative procedures. Usually the syslog messages are logged for
subsequent review by the system operator. A number of devices used within a handset wireless
configuration are capable of sending messages to a Syslog Server.
The Syslog Server can be any RFC 3164-compliant log server. The WLAN IP Telephony Manager
2245, Wireless Security Switches 2250/2270, WLAN Application Gateway 2246, and WLAN
APs 2220/2221/2230/2231 can be configured to generate syslog messages. Refer to the
documentation for the Wireless Security Switches and WLAN APs for information on configuring
syslog messages. For information on configuring syslog messages on the WLAN IP Telephony
Manager 2245, see “Configuring the network” on page 57.
There are numerous third-party Syslog Servers available. Any RFC 3164-compliant Syslog Server
can be used.
AP planning
APs utilize radio frequencies to transmit signals to and from the wireless handsets.
Chapter 3 Planning 23
It is essential to know where to install the APs to provide effective coverage for wireless handset
use. It is necessary to verify that coverage is available where it is needed. The first step is to define
exactly where the coverage is needed, which requires a site survey.
Recommendation
A site survey must be performed before installing a wireless LAN. A site
survey is also recommended when an existing network structure is
modified or when physical changes are made to a site.
Avaya recommends the use of the Site Survey Tool to perform the site
survey.
A site survey is critical to designing and implementing a wireless LAN. The site survey is used to
determine the number of APs needed to support the wireless handset users and to determine the
best placement of the APs. Different AP vendors provide different tools to do this.
Site survey
To conduct a site survey, set up an AP at a particular location. Use a computer equipped with a
wireless LAN device and site survey software or a handset operating in Site Survey mode to
measure the strength of the signal from the AP. Move the wireless device around and repeat the
measurements to determine the optimum number and best locations for the APs. This method
helps identify dead zones and areas where building materials or other factors affect the
performance of the network.
WLAN IP Telephony Installation and Configuration Guide
24 Chapter 3 Planning
Site Survey mode
The handset Site Survey mode displays negative dBm levels. These levels represent the strength of
the received signal (Received Signal Strength Indication or RSSI) from an AP. The RSSI
information aids in determining if WLAN coverage is adequate.
For information on using the Site Survey mode, see “To test signal strength using the wireless
handset” on page 105.
Note: The handsets do not require connectivity to a 2245 IP Telephony Manager
or the Call Server to enable the Site Survey mode to be used. The minimum
configuration required is the Extended Service Set Identifier (ESSID) of the
WLAN or test AP and the WEP keys, if applicable.
AP requirement considerations
Each site is unique in its AP requirements. Consider the following points when determining how
many APs are needed and where they should be placed:
• Minimum Radio Signal Strength – All APs in the coverage area must receive a signal
strength better than -70 dbm. Measurement is made in negative dbm, which measure the
amount of signal loss due to distance. Therefore, stronger signals are those with smaller
values. For example, -50 and -60 indicate stronger signals than -70; -80 is a weaker, poorer
signal than -70.
• Adjacent APs and channel interference – In order to avoid undesirable interference from
adjacent APs, ensure that adjacent APs do not use channels that overlap on the same
frequencies.
Figure 1 shows the frequencies used by each channel. In the figure, channels on the same
horizontal line do not overlap. In the coverage area of any given AP, signals from other APs using
overlapping channels should be at least -15 to -20 dbm weaker. Because the Site Survey mode
displays signals only from APs on the same Extended Service Set ID (ESSID), check for signals
from APs using all ESSIDs to avoid channel overlap.
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Figure 1 Frequencies used by each channel
• Wireless handset range – Wireless LAN coverage must be available wherever wireless
handsets will be used. Although the typical range for a wireless handset is comparable to
that of a laptop computer utilizing a wireless LAN PC card, the range may not be exactly
the same. Therefore, it is preferable to use a handset to carry out the site survey, if
possible. Remember that wireless handsets might be used in areas where data devices are
not typically used, such as stairwells, washrooms, hallways, and outdoor areas.
• Number of wireless handsets per AP – Estimate the number of wireless handsets and the
anticipated call volume per AP area to ensure that the maximum number of calls per AP
will not be exceeded. See Appendix B, “Compatible Access Points for the maximum
number of calls per AP for each supported manufacturer.
• The data rates at which the wireless handsets will operate – Higher data rates (such as
11Mb/s) can only be sustained while well within the range of the AP. If the wireless
handsets are operating near the limits of the radio frequency (RF) coverage from the AP,
they automatically drop to 1 Mb/s operation. Handsets require approximately:
— 7% of available bandwidth per call at 11 Mb/s operation
— 10% of the available bandwidth per call for 2 Mb/s operation
— 15% of the available bandwidth per call for 1 Mb/s operation
Chapter 3 Planning 25
Note: These requirements mean that areas with a high-use density must receive
RF coverage at the highest data rate of operation.
• LAN bandwidth – Estimate anticipated peak call volume to ensure that enough bandwidth
is available to handle the network traffic generated by all the wireless handsets. Handsets
require approximately 150 kbps of bandwidth per call. Network traffic can be monitored/
analyzed using a network sniffer or an SNMP workstation.
• Number of other wireless devices per AP – The wireless handsets can share bandwidth
with other wireless devices. To ensure adequate RF bandwidth availability, consider the
number of wireless data devices in use per AP.
Note: In a very large or complex site, it may be advisable to contract a
professional site survey.
WLAN IP Telephony Installation and Configuration Guide
26 Chapter 3 Planning
Conducting an effective site survey
Consider the following points for an effective site survey.
Network usage
Examine the network usage:
• How many people will be using a wireless handset?
• What areas of the site require wireless handset access?
• How many hours each day will wireless handsets be in use?
• Which locations are likely to generate the largest amount of traffic?
• Where is future network expansion most likely?
Mobility requirements
Assess the mobility requirements:
• How many wireless handset users are in motion continually, such as in a warehouse or
hospital?
• How many users work from different fixed locations throughout the site?
Physical site study
Perform a study of the physical site:
• Study blueprints of the proposed site. A site blueprint provides a map of the site, including
the location of objects such as walls, partitions, and anything else that could affect the
performance of a wireless handset. This helps identify areas where wireless handsets are
less likely to perform well. Many obstructions are not readily visible and, in some cases, a
room originally built for a specific purpose, such as a radiology lab, might have been
converted into something completely different, such as a conference room. The blueprint
may also show areas proposed for future building expansion.
• Mark possible wireless handset usage locations on the blueprint and refer to the marked
blueprint during the physical walk-through and inventory.
Walk-through and survey
Conduct a physical walk-through and survey:
• Document any items or materials near a proposed AP location that might interfere with
reception or transmission and affect wireless handset performance, such as metal shelving.
• Document stock and inventory levels, current environmental conditions, and any materials
that may interfere with wireless handset transmissions.
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Chapter 3 Planning 27
RF transmission testing
Once the APs have been installed and configured, it is necessary to measure the strength of the RF
transmissions. Signal strength testing ensures that all usage areas have adequate coverage. This can
be performed in two ways.
1 Use the handsets to determine AP signal strength using the Site Survey mode.
2 Use two portable computers with wireless hardware operating on a point-to-point basis. Using
diagnostic software provided by the AP vendor, a coverage area for a potential AP can be
determined by keeping one portable computer in one place and moving around with the other
computer. Check with the vendor as to what tools are provided and what approach is
recommended for deploying their APs.
Example of AP placement
Figure 2 on page 28 is an example of an AP placement diagram.
WLAN IP Telephony Installation and Configuration Guide
28 Chapter 3 Planning
Figure 2 Sample AP placement diagram
Cell “D” = Channel 1 w/11 Clients Cell “B” = Channel 6 w/15 Clients Cell “A” = Channel 1 w/9 Clients
Meeting Room
Reception
10'-0"
Training Room
18'-0"
Cell “E” = Channel 6 w/19 Clients
Men
Women
Cell “C” = Channel 11 w/6 Clients
Computer Room
Break Room
Microwave
802.11b Preliminary Wireless
Site Plan
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553-AAA1447
Solving coverage issues
Resolve coverage issues by adding and/or relocating APs.
Solving overlap issues
Resolve overlap issues by reassigning channels to the APs or by relocating the APs. Like channels
require 15–20 dBm separation. See Figure 3.
Figure 3 jChannel assignment
Chapter 3 Planning 29
Refer to the AP vendor documentation for more information on overlap.
Network planning
It is necessary to ensure that all connections and interfaces for the IP Telephony network be
configured as full-duplex. Duplex mismatches anywhere on the WLAN can cause the wireless IP
Telephony system not to function normally.
Zones
Avaya recommends that the handsets be assigned to dedicated zones. The zones can be used to
manage the bandwidth of the WLAN IP Telephony Manager 2245 groups. As well, zone
designations can be used to list the wireless handsets that are currently registered or have been
registered using LD 117 commands.
For more information, see “Bandwidth management” on page 37.
WLAN IP Telephony Installation and Configuration Guide
30 Chapter 3 Planning
WLAN IP Telephony Manager 2245 planning
Both the WLAN IP Telephony Manager 2245 and the WLAN Application Telephony Gateway
2246 are connected to the Ethernet switch.
Installation requirements
The WLAN IP Telephony Manager 2245 requires a CAT5 cable connection between its network
port and the Ethernet switch. The WLAN IP Telephony Manager 2245 auto-negotiates to the type
of port on the Ethernet switch. It supports 10BaseT, 100BaseT, full-duplex and half-duplex port
types.
Avaya recommends 100BaseT full-duplex.
Note: When multiple WLAN IP Telephony Managers 2245 are used, all the
WLAN IP Telephony Managers 2245 must use a uniform media type. Do not use
full-duplex on some and half-duplex on others, or 10BaseT on some and
100BaseT on others.
Capacities
Table 2 lists the number of wireless handsets supported for the different physical media used in the
network.
Table 2 Supported number of calls and wireless handsets
Media type Number of supported calls
10BaseT 10 500
100BaseT 80 500
In any subnet where wireless handsets will be used, each subnet must have one or more WLAN IP
Telephony Managers 2245. A WLAN IP Telephony Manager 2245 group on a subnet consists of
one or more WLAN IP Telephony Managers 2245 and their associated wireless handsets. Only
one master WLAN IP Telephony Manager 2245 can be on a subnet.
WLAN IP Telephony Manager 2245 groups
WLAN IP Telephony Manager 2245 groups are those that have more than one WLAN IP
Telephony Manager 2245 in order to accommodate larger systems and a higher volume of wireless
telephony traffic.
Number of supported
wireless handsets
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