Avaya 3641 Administration Manual page 15

Avaya 3641/3645 IP Wireless Handset Overview
networks, it is possible for the quality of service (QoS) features of the SVP Server to be
compromised, and consequently voice quality may suffer. Any network that consists of
more than a single Ethernet switch should be thoroughly tested to ensure any quality
issues are addressed. See
Best Practices Guide for Deploying SpectraLink 8020/8030
for additional guidance.
Wireless Telephones
Avaya 3641/3645/6120/6140 IP Wireless Handsets cannot roam with uninterrupted
service between subnets unless specific LAN components are present. Certain
AP/Ethernet switch combinations establish a Layer-2 tunnel across subnets that enable
the handsets to roam. Without this capability, the telephone drops any call in progress
when the user moves out of range. The handset must be power cycled in order to
resume functionality in the new subnet area.
Ensure that you have attached all your APs to the same subnet for proper operation.
The handset can change subnets if you have enabled DHCP and switch on the handset
within range of APs on a new subnet. Note that the wireless telephones cannot "roam"
across subnets, since their IP addresses do not change while operational.
® ®
Avaya Aura Session Manager and Avaya Aura Communications Manager
® ®
The Avaya Aura Session Manager and Avaya Aura Communications Manager
provides access to telephony services and connects to another device such as a PBX or
gateway and from there, other wired phones and the PSTN.
HTTP server
An HTTP server is required to distribute software to the handsets. In a system with no
HTTP server, you may use a TFTP server for this purpose.
TFTP (Trivial File Transfer Protocol) server
You may use a TFTP server to distribute software to the handsets if there is no HTTP
server. It may be on a different subnet than the APs and the handsets.
NTP (Network Time Protocol) Server
If you use WPA2 Enterprise security, the handset confirms if the PEAP certificate has a
valid date and time with the NTP server on the network, if the server is available. If an
NTP Server is not available, the certificate will be assumed valid and operate
accordingly. When you use an NTP server, the server provides date and time
information to the handset.
Authentication Server (if using WPA2 Enterprise)
You must use a RADIUS authentication server to provide username/password based
authentication using RSA certificates for PEAPv0/MSCHAPv2 or PAC files for EAP-
FAST.
You can use the following authentication servers with R3.0:

Juniper Networks Steel-belted Radius Enterprise Edition (formerly Funk), v6.1
Avaya 3641/3645/6120/6140 IP Wireless Handset SIP Administration Guide June 2012 15