Can 3rd party SFP modules be used for fiber connections?

Answer: No.  The PTP 650 has only been tested and validated to work with the Cambium Networks supplied SFP modules.  Each Cambium SFP module is delivered with the SFP module, a waterproof gland, a software license key to activate the port, and a set of instructions.  3rd party SFP modules will not operate in a PTP 650.