Will you guys please post back to the forum on what you find out from Cisco on this?
Thank you very much. Mike Hanson Network Security Manager The College of St. Scholastica Duluth, MN 55811 (218)-723-7097 [email protected] >>> Lee H Badman <[email protected]> 5/13/2009 3:21 PM >>> Much of this is recent- and disturbing in that Cisco seems to have "snuck it in" at some point in the recent past. The "avoid vertical surfaces" for mounting is 100% contrary to original 1130 documentation where they went so far as to show the different patterns to leverage between wall and ceiling mount in the data sheet, playing up the options and flexibility provided by having your choice of either orientation. We did site surveys- but still have many, many 1130s that are vertically mounted for lack of any other option, or for aesthetics. I will be asking our SE to get an explanation from the WBU on why it was OK to mount 1130s vertically, and now there is some unexplained taboo to it. -Lee Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ________________________________ From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Kellogg, Brian D. Sent: Wednesday, May 13, 2009 4:02 PM To: [email protected] Subject: Re: [WIRELESS-LAN] Cisco 1131ABG AP The below was taken from Cisco's installation instructions for the 1130AG APs. Note the last bullet point. I don't remember ever reading that in 2007 when we purchased and installed them. It seems to be a late addition as evidenced by the discussion thread sent in the first email on this subject. My institution declined paying for a site survey before installation so I can't completely or even primarily blame Cisco. A site survey is always wise, but this would still have been nice to know then. http://www.cisco.com/en/US/docs/wireless/access_point/1130/installation/guide/113h_c2.html#wp1082741 Basic Installation Guidelines Because the access point is a radio device, it is susceptible to interference that can reduce throughput and range. Follow these basic guidelines to ensure the best possible performance: * Ensure a site survey has been performed to determine the optimum placement of access points. * For lightweight access points, check the latest release notes to ensure that your controller software version supports the access points to be installed. You can find the controller release notes by selecting your controller under Wireless LAN Controllers at this URL: http://www.cisco.com/en/US/products/hw/wireless/tsd_products_support_category_home.html * Ensure that access points are not mounted closer than 20 cm (7.9 in) from the body of all persons. * Do not mount the access point within 3 feet of metal obstructions. * Install the access point away from microwave ovens. Microwave ovens operate on the same frequency as the access point and can cause signal interference. * Do not mount the access point outside of buildings. * Do not mount the access points on walls or other vertical surfaces. Thank you, Brian Kellogg Network Services Manager St. Bonaventure University 716-375-4092 From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Lee H Badman Sent: Wednesday, May 13, 2009 10:21 AM To: [email protected] Subject: Re: Cisco 1131ABG AP Weird. Here is this statement from document C78-401677-01 07/07: Applications In offices and similarly open environments, Cisco Aironet 1130G Series Access Points can be installed on the ceiling to provide users with continuous coverage as they roam throughout a facility. In school buildings and similar facilities, the access points can be installed on the ceiling of each room and hallway to provide users with full coverage and high network availability. In areas where a ceiling installation may not be practical, such as retail hotspots or similar small facilities, the access points can be mounted simply and securely on walls for complete coverage with minimal installation cost. Also- I was very surprised to see that the current data sheet does not show the ceiling-mount versus wall-mount antenna patterns anymore. It certainly used to, and basically the change between wall/ceiling isn't that drastic- just a change in vertical/horizontal beamwidths and subsequent influence on antenna pattern- but when close to the AP, there should be no performance difference noted (we have plenty of both). See if this picture comes through- screenshot from original 13-page 1130 data sheet. If you need the whole doc, email me directly. [cid:[email protected]] Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ________________________________ From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Kellogg, Brian D. Sent: Wednesday, May 13, 2009 9:39 AM To: [email protected] Subject: [WIRELESS-LAN] Cisco 1131ABG AP It seems the 1131 AP from Cisco performs best when mounted on a horizontal surface; see below. We've been trying to discover why some areas have weak signal strength despite close AP placement. We'll be investigating this this summer by reorienting some APs to the horizontal and see if that helps. Unfortunately due to building construction here it is very difficult to get some APs in a horizontal orientation when taking aesthetics into consideration. Anyone else run into this issue? http://www.cwnp.com/phpBB2/viewtopic.php?p=16189 Thank you, Brian Kellogg Network Services Manager St. Bonaventure University 716-375-4092 ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
