Is this for voice or data? Presumably voice is your using -65. I find that an AP every 40ft (12m) in an average office environment results in far too much co-channel interference, in particular at 2.4 GHz and more so when you throw in multiple floors. I haven't used Planner in AM but I receive predictive surveys performed in WCS and they usually have been performed with Voice set to a safety margin of 'Very Safe' or '7920 enabled'. This results in APs around the 40ft mark. This provides you with AP redundancy but imo AP redundancy is a poor design in most cases due to the crazy amount of resulting CCI resulting, particularly if doing voice at 5 GHz.
I received a WCS survey as above specifying ~160 APs and I put in 90 and I even think this may have been too high - this survey also included a few dozen APs in monitor mode for location. When surveying I try to place my second AP around ~78 dBm which results in the overlap for voice I am looking for. This results in my rule-of-thumb of 20m (65 ft) spacing of APs, which of course varies up and down depending on environment. What options are available in AM Planner when it comes to specifying overlap? From: [email protected] [mailto:[email protected]] On Behalf Of Jason Aarons (AM) Sent: Wednesday, 9 May 2012 10:37 PM To: [email protected] Subject: [OSL | CCIE_Wireless] 3502I coverage 802.11a in walled office AriMagnet Planner (Predictive Survey) shows to provide -65 RSSI (at 25mW) or better in 5GHz using 3500 Integrated Omni 3.0dBi A (AIR-CAP3502I-x-K9) that Every 40 -50 feet you need 1 3500 AP in a walled small/office environment This equals roughly 1 3502I-A-K9 per 1600 Sq. Ft. Approx. 20-25 ft. from 3502I you start to exceed/go higher than -65. Is this what you are seeing in other 802.11a 5Ghz deployments/predictive surveys for the above coverage requirements? Any sq ft rule of thumb you are using for 802.11a 5Ghz walled office?
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
