Cisco Systems 71642 manual VoWLAN Deployments Ciscos Reccommendations

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and has these packets routed through normal multicast routing methods.

Figure 7￿Multiple Controller Layer 3 Deployment

VoWLAN Deployments: Cisco￿s Reccommendations

Wireless IP Telephony networks require careful RF planning. A thorough voice site survey is often required to determine the proper levels of wireless coverage and to identify sources of interference. Access point placement and antenna selection choices can be greatly eased with the help of the results of a valid voice site survey. The most important consideration is the transmit power of the wireless phone. Ideally the phone learns the transmit power of the access point and adjust its transmit power to that of the access point.

Although the majority of the wireless networks today are deployed after an extensive RF site survey, they are done with keeping data service in mind as well. VoWLAN phones are likely to have different roaming characteristics and different coverage requirements than those of a typical WLAN adapter for a mobile client such as a laptop. Therefore, an additional site survey for voice is often recommended to prepare for the performance requirements of multiple VoWLAN clients. This additional survey gives the opportunity to tune the access points to ensure that the VoWLAN phones have enough RF coverage and bandwidth to provide proper voice quality.

For additional information on RF design considerations, refer to the chapter on WLAN Radio Frequency (RF) Design Considerations in the Cisco Wireless LAN Design Guide, available at http://cisco.com/go/srnd.

Recommendations for Multi−Floor Buildings, Hospitals, and Warehouses

Consider the factors listed in this section when you survey multi−floor buildings, hospitals, and warehouses.

Construction Methods and Materials

Many aspects of the building construction are unknown or hidden from the site survey, so you might have to acquire that information from other sources (such as architectural drawings). Some examples of typical construction methods and materials that affect the range and coverage area of access points include metallic film on window glass, leaded glass, steel−studded walls, cement floors and walls with steel reinforcement, foil−backed insulation, stairwells and elevator shafts, plumbing pipes and fixtures, and many others.

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Contents Deployment Scenarios Document IDRequirements Components Used IntroductionPrerequisites Executive SummaryVocera Communications Server Capacity Vocera SolutionVocera Badge Overview Vocera Call Capacity ConsiderationsArchitecture Overview Voceras Infrastructure PlanningUnicast−Multicast Delivery Method Multicast in an Lwapp DeploymentLwapp Multicast−Multicast Multicast−Multicast Delivery MethodEnable PIM on an Interface Router and Switch Multicast ConfigurationEnable IP Multicast Routing Multicast Enhancements in Version 4.0.206.0 and Later Disable Switch Vlan Igmp SnoopingDeployment Scenarios Single Controller Deployment Single Controller in Multicast−Multicast ModeMultiple Controller Layer 3 Deployment Multiple Controller Layer 2 DeploymentConstruction Methods and Materials VoWLAN Deployments Ciscos ReccommendationsInventory Leap Considerations Security Mechanisms SupportedNetwork Sizing Wireless Network InfrastructureVoice, Data and Vocera VLANs Badge Configuration Switch RecommendationsDeployments and Configuration Tune AutoRF for Your Environment ∙ How do I know if the tranmit power is too hot or too cold? Create Interfaces Wireless Network Infrastructure ConfigurationCreate the Vocera Voice Interface Wireless−Specific ConfigurationWlan Configuration Wlan ConfigurationAP Detail Configure Access Point DetailConfigure the 802.11b/g Radio Wireless IP Telephony Verification Association, Authentication, and Registration Badge Loses Voice Quality while Roaming Common Roaming IssuesChoppy or Robotic Audio Audio ProblemsRegistration and Authentication Problems One−sided AudioAppendix a AP and Antenna PlacementSignal Reflection Caused by a Wall Cisco Aironet 5959 Antenna Mounted to a Ceiling Interference and Multipath Distortion Signal−to−Noise Ratio SNRSignal Attenuation NetPro Discussion Forums − Featured ConversationsRelated Information