114 Planning the Nortel WLAN 2300 SystemNN47250-102 (320666-G Version 02.01)• The Total number of objects that will be corrected line indicates the number of measurementsthat did experience attenuation. For existing RF objects, WLAN Management Softwarecorrects the attenuation to match the results. If the floor plan does not have an RF obstaclewhere the attenuation library indicates one exists, WLAN Management Software creates anRF obstacle.For RF obstacles created by WLAN Management Software, the description is auto-generated andthe obstacle type is Other. You can edit these values by selecting the obstacle, clicking the Editproperties icon to open the Modify RF Obstacle wizard, and modifying the values. Click OK toclose the wizard and save the changes. (See “To use the Create RF Obstacle Dialog box” (page 102).The wizard is the same whether it is labeled Create or Modify.)2 Click Finish.Defining Wireless Coverage AreasYou must define which areas of your enterprise require wireless network coverage. In WLAN Management Software,you plan for both coverage and capacity requirements in a particular area on the floor. Capacity requirements are deter-mined by the number of users in the area and the amount of wireless network bandwidth desired for every user.The floor of a building can contain multiple coverage areas if several groups of users on the floor require different band-width. For example, an engineering department might have its own coverage area to accommodate a need for higherbandwidth, but the rest of the floor might be planned for general use with lower bandwidth requirements.You must also identify the wireless technology required (802.11a or 802.11b/g) for coverage areas. For areas requiringmultiple wireless technologies, two completely overlapping coverage areas are created—one for 802.11a and one for802.11b/g.You define coverage by creating the following items:• Wiring closets (at least one is required if you plan to install directly connected APs). See “Creating a WiringCloset” (page 114).• Coverage areas (required). See “Defining a Coverage Area” (page 116).• RF measurement points (optional). See “Showing RF Coverage” (page 149).• Third-party access points (optional). See “Placing Third-Party Access Points” (page 131).Creating a Wiring ClosetA wiring closet is a room that contains networking devices, such as switches. If you have an existing wiring closet, youcan draw it on the floor layout.If you have previously installed WSSs and defined them in WMS, you can place them in the wiring closet and specifythem as switches to be used when WMS calculates how many APs are required. If you do not have any WSSs placed inthe wiring closet, WMS automatically creates and configures the switches that are needed.Each floor plan must have at least one wiring closet, if the floor will use APs that are directly connected to their WSSs.However, a floor is not required to have a wiring closet if APs will be indirectly attached through the network. In thiscase, if you do not create a wiring closet, WLAN Management Software assumes the switch that will manage theDistributed APs will be located in a wiring closet on another floor in the building.
