The AP650 supports mimo, 1x1-mimo, mimo-diversity and Primary antenna mode only. So in this case it should rather be mimo-diversity

Hi Henrich, this is somehow true. But if you disable all the N datarates, mimo-diversity will not really do anything different. mimo-diversity will use MIMO for N clients and diversity for legacy devices. Please find attached a nice document describing the antenna options ... Best regards, Angelo

Angelo, This is the document that I had and that's where I got the information from:
Supported Antenna Mode for Models AP650 and AP650H/L

 

             1x1-mimo        MIMO 1x1 uses only antenna A to transmit and receive

             mimo            MIMO

             mimo-diversity    MIMO Diversity for non-11n transmit rates

             primary          Primary Antenna only

 

 

 

Supported Antenna Mode for Models AP300H/L

 

            diversity       Full Diversity (both antennas)

            primary         Primary Antenna only

            secondary       Secondary Antenna only
You see that diversity is not an option for the AP650. In this case mimo-diversity is "normal" diversity for 802.11n APs and does the same thing as "diversity" on legacy APs

Angelo, Nope its a single RFS4000 per site, with 3 - 4 AP650s physically connected, i.e. no other network switch or PoE in between. We seem to get problems when roaming from 1 AP to another. IJ

Ian, ok, in that case, please configure the AP650 as follows: 802.11bg mode, no 802.11n 15 dBm output max. 1 and 2 MBit/s as basic, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, 54 as supported. Enable the dynamic chain select and choose as the antenna option "diversity" in the CLI. This will help the "old" b/g radios in the MU to "talk" to the n radio in the AP much better. Best regards, Angelo

Hi Ian, I assume the customer is running more than one RFS4000. In that case, disabling the firewall in the CLI is always very helpful: enable configure terminal no firewall enable write memory Best regards, Angelo