Mount an Access Point on a 3.5-Inch or 4-Inch Round Junction Box
Note:
This topic is applicable to the following access points (APs): AP21, AP24, AP27, AP32, AP33, AP34, AP36, AP37, AP41, AP43, AP45, AP47, and BT11.
You will need the APBR-U universal mounting bracket.
To mount an AP on a 3.5-inch or 4-inch round junction
box:
This is a US 3 and 1/2 inch round and the BR-U attaches as shown here. And the AP would be installed normally. This is a US 4-inch round and the BR-U attaches as shown here. And the AP would be installed normally.

