Hello,

We have installed Mikrotik OS 2.9.24 on RB500 + Atheros 400mW card within.

The Access Point has 10 associated wireless customers (SU) and what is experienced as a problem is a slow speed (when they start using speed drops from 4Mb to 30k). We did test from SU to AP or SU to main network, we got the same results.
Max usage on AP what we can see is only 5Mb. I like to know we are doing something wrong or RB500 cann't handle more than 5 SU's ?

Bellow is a print screen of the configuration :

[admin@MikroTik] interface wireless> print
Flags: X - disabled, R - running
0 R name="wlan1" mtu=1500 mac-address=00:01:B4:02:0C:03 arp=enabled
disable-running-check=no interface-type=Atheros AR5213
radio-name="AP north" mode=ap-bridge ssid="accesstest" area=""
frequency-mode=regulatory-domain country=canada antenna-gain=0
frequency=5300 band=5ghz scan-list=default rate-set=configured
supported-rates-a/g=6Mbps,9Mbps,12Mbps,18Mbps,24Mbps
basic-rates-a/g=6Mbps max-station-count=2007 ack-timeout=dynamic
tx-power-mode=default noise-floor-threshold=default
periodic-calibration=default periodic-calibration-interval=60
burst-time=disabled dfs-mode=none antenna-mode=ant-b wds-mode=dynamic
wds-default-bridge=bridge1 wds-default-cost=100 wds-cost-range=50-150
wds-ignore-ssid=no update-stats-interval=disabled
default-authentication=no default-forwarding=no default-ap-tx-limit=0
default-client-tx-limit=0 hide-ssid=yes security-profile=default
disconnect-timeout=3s on-fail-retry-time=100ms preamble-mode=both
compression=no allow-sharedkey=no

Is the path mtu 1500 or greater?
Who produced that 400 milliwatt Atheros card?
What is the SU's signal strengths?
What type of antenna and how is it situated?

antenna-mode=ant-b <--- is this default settings??? I don't think so

antenna-mode=ant-b <--- is this default settings??? I don't think so

Even the MAC address shows different, I suppose this is SR2 with MMCX pigtail. I had the same configuration, but had lot of problems with it. Users had very weak signal levels, and therefore, slow speeds. The card was not faulty, becouse changing to another shows no improvement. After changing the pigtail from MMCX to U.FL everything went to normal!
If this card is SR2, I suggest pigtail change. And, ofcourse, let us know did it helped at all.