Polycom 4400 manual Known Limitations

Page 4

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-GradeWi-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.

4

PN: 1725-36070-001_P.doc

Page 3 Page 5
Image 4
Page 3 Page 5
Contents Cisco Trademark Information Introduction Certified Product SummaryKnown Limitations Network Topology Configuring a New Controller Starting from Factory Defaults Connecting to the Controller via a Browser Installing Software Controller Setup Initial setup of the controller is shown belowConnecting APs Under Interface Name click managementServer AP Configuration Set Admin Status to Enable 802.11b 70 dBm Mb/s 60 dBm 11 Mb/s 802.11a 45 dBm 54 Mb/s Use the default Fragmentation Threshold 2346 bytes Configuration Guide Set Admin Status to Enable Use the default Fragmentation Threshold 2346 bytes For 802.11a Network Status, click the Enabled check box Setting Up the SSIDs Setting up the voice SsidPN 1725-36070-001P.doc Configuration Guide Further Assistance
Top Page Image Contents