the 450 is a 4 years old pointless product like nearly everything from Cambium..it is too expensive and soo low Bandwith for the customers.We have thrown it out of the Network..The epmp serie has only bugs( we have found last week a new with heavy traffic and more than 35 CPE´s on a AP) and Cambium told me that they can not fix it before Christmas.
2015-11-08 4:21 GMT+01:00 Eric Kuhnke <eric.kuh...@gmail.com>: > Same on any half duplex TDD platform with PtMP and low modulation (QPSK) > subscribers. If you have a ubnt 5 GHz AP with a bunch of clients in 64QAM > 3/4 to 64QAM 5/6 and a few are on the air using QPSK 1/2, it's going to drag > down the performance of that whole radio and sector significantly. It can be > as much as from 80 Mbps aggregate to 20 Mbps. Looking at the RSL thresholds > needed to operate at 1X in 450 terms, it sounds like a few of those client > radios are "just barely hanging on"... > > On Fri, Nov 6, 2015 at 10:37 AM, George Skorup <geo...@cbcast.com> wrote: >> >> If those 1X and 2X downlink SMs are even moderately active, that really >> throws a wrench into the sector performance. This is true on any PMP >> platform. We've seen our fair share of it. We've moved a couple back to FSK >> which is something I never, ever want to do, but it was unfortunately >> necessary. >> >> >> On 11/6/2015 11:50 AM, Eric Muehleisen wrote: >>> >>> We have a few 450 AP's with 30-40 subscribers and have been getting >>> several slow speed complaints lately. I just chaulked it up to issues >>> with the SM since the AP rarely got over 20mb/s downlink. We upgraded >>> to 13.4 recently so we could watch our frame utilization. We started >>> graphing it over night and as you can see, we are hitting 100% for >>> sustained periods of time. During that time the AP is only doing >>> approx. 23mb/s. This particular AP has 34 registered SM and the >>> majority show 6x and 4x with 4 or 5 SM's at 2x and 1x. The performance >>> is a major disappointment. Anyone else have similar experiences? >>> >>> AP configuration: 20mhz channels, 2.5ms frame, 10 miles, 75% downlink, >>> 3 contention slots. >>> >>> Attached is a screenshot of the utilization and sector throughput >>> calculator from the Capacity Planner R13. >> >> >
