CCNP Wireless CUWSS 642-732 Summary Notes 5 : Regulatory Issues

Regulatory Domains: Several countries use the same regulatory rules, forming regulatory domains. They define such things as power of transmission, antenna gain and frequency used. A domain - US, Taiwan, Puerto Rico etc - Follow Federal Communication Commision rules E domain - Europe, Israel, Mexico, Singapore etc - follow Europe Telecommunication Standard Institute Rules Japan - follow Ministry … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 5 : Regulatory Issues →

CCNP Wireless CUWSS 642-732 Summary Notes 4 : 802.11n hardware

When performing a survey for 802.11n, signal strength is not an accurate predictor of 802.11n performance. Multipath can actually enhance performance with 802.11n clients. 802.11n hardware Disadvantage of non-802.11 hardware is that they may have 2 antennas per band but they both are connected to the same radio circuit so when they receive a signal, the … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 4 : 802.11n hardware →

CCNP Wireless CUWSS 642-732 Summary Notes 3 : RF Applications and Client Devices

RF Applications Data rate is just the link speed and not the throughput (download speed). 802.11b at an 11-Mbps data rate offers on average a 5.5-Mbps throughput. 11b usually degrades performance for other devices in the other bands. Avoid using this band, unless you have old devices. 802.11g at54Mbpsoffersonaveragea20-Mbps throughput butdegradesto6-Mbps throughput as soon as a 802.11b device … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 3 : RF Applications and Client Devices →

CCNP Wireless CUWSS 642-732 Summary Notes 2 : Site Survey Preassessment

Site Survey Pre-assessment can be done using a questionnaire that should have most of this information to enable proper design planning for the WLAN. Customer contact information Total number of sites Is it a New vs existing deployment Band requirements Existing devices Data coverage type (VoWLAN, Data, Location services) Facility information - get maps for … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 2 : Site Survey Preassessment →

CCNP Wireless CUWSS 642-732 Summary Notes 1 : Site Survey Requirements for Different Vertical Industries

A site survey is a task-by-task process in which the surveyor studies the facility to understand the RF behavior, discovers RF coverage areas, checks for RF interference, and determines the appropriate placement of wireless devices. Top considerations: Identify Customer Requirements and his expectations. What type of environment? Consider the regulatory issues for that particular site Asses the … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 1 : Site Survey Requirements for Different Vertical Industries →

CWNA Summary Notes: Coverage Analysis Methods

Manual Site Survey Passive manual survey - The radio card collects RF measurements but the client adapter is not associated to the access point during the survey, and all information is received from radio signals that exist at layer 1. Active manual survey - the radio card is associated to the access point and has layer 2 connectively, allowing … Continue reading CWNA Summary Notes: Coverage Analysis Methods →

CWNA Summary Notes: Capacity and Coverage Requirements

Capacity and Coverage Requirements Factors that should be considered when planning for Capacity: Data applications. For 802.11b/g network, 12 to 15 data users per AP ForVoWiFi SpectraLink recommends max of 12 calls per 11 Mbps cell (with 1 call needing 4.5 % of AP bandwidth), 7 calls per 2 Mbps (with 1 call needing 12% … Continue reading CWNA Summary Notes: Capacity and Coverage Requirements →

CWNA Summary Notes: Procedures for Performing a Site Survey

Gather background data for the site survey Examine business requirements Why do they need a WLAN is mobility required What devices will be connecting What apps will be used What is the amount of bandwidth required by the user Conduct interviews with personnel One-on-one interviews Group interviews Facilitated sessions - a much larger group consisting of … Continue reading CWNA Summary Notes: Procedures for Performing a Site Survey →

CWNA Summary Notes: Specialized Site Survey Tools

These tools include: dedicated site survey applications spectrum analyzers protocol analyzers documentation tools Voice over WiFi (VoWiFi) Tools and Surveys Dedicated Applications eg. Site Survey Analyzer These applications can send packets and then analyze both transmitting and receiving data. Settings included in dedicated applications include: Destination MAC Address of the AP that will be tested Continuous Link Test … Continue reading CWNA Summary Notes: Specialized Site Survey Tools →