Configuration Guide
Known Limitations • Wi-Fi Multimedia (WMM) must be disabled in order for
SpectraLink Wireless Telephones to work properly.
• Heavy multicast, broadcast, or push-to-talk (PTT) traffic may
impair voice quality.
• The Cisco 1000 series APs are not VIEW Certified at this time.
• Voice and data must be separated onto separate service set
identifiers (SSIDs) to obtain the best voice performance.
• The Cisco 1252 (802.11n) series access points are not VIEW
Certified at this time.
This document does not cover the steps involved in converting
autonomous APs to Lightweight Access Point Protocol (LWAPP)
APs such that they can be controlled by the 4400 WLC. Please
contact Cisco's Customer Support at www.cisco.com for instructions
on this procedure. Once the APs are converted, this document can
be used to provision LWAPP APs.
Subnet roaming was successfully tested, although it is not
represented in the network configuration diagram, nor is it covered
in the subsequent configuration steps contained in this document. It
is important to note that the SpectraLink Wireless Telephones
cannot roam across subnets without the creation of a tunnel
between two Cisco WLCs. Please consult the Cisco documentation
in order to configure these tunneling mechanisms.
Access Point Capacity and Positioning Please refer to the Polycom Deploying Enterprise-Grade Wi-Fi Telephony
white paper. This document covers the security, coverage, capacity
and QoS considerations necessary for ensuring excellent voice quality
with enterprise Wi-Fi networks.
For more detailed information on wireless LAN layout, network
infrastructure, QoS, security and subnets, please see the Best Practices
Guide for Deploying SpectraLink 8020/8030 Wireless Telephones. This
document identifies issues and solutions based on Polycom’s
extensive experience in enterprise-class Wi-Fi telephony, and
provides recommendations for ensuring that a network environment
is adequately optimized for use with SpectraLink 8020/8030 Wireless
Telephones.
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