Thanks. That clarifies some aspects of the original post.
You're looking to use multimode cable at 1310 nm wavelength. Cambium doesn't supply a suitable SFP transceiver for this combination. As far as I know, this hasn't been a problem in the past.
As we pointed out before, the upgrade includes the extended gland and the entitlement to enable the SFP port on the PTP 650. The license simply enables the port; it doesn't lock the ODU to any particular optical SFP module.
Of course, Cambium does not manufacture SFP modules. We simply selected some suitable parts and tested them to ensure compatibility. Figure 23 in the PTP 650 User Guide shows a JDSU part. You can see details of the SFP modules installed by looking at the SFP Configuration page in the web-based interface.
Fiber SFP modules are actually quite simple, essentially consisting of an optical transmitter and receiver, a basic controller, and not much else. We checked out the datasheets for the GLC-FE-100FX-RGD and GLC-GE-100FX. These parts work at 125 Mbit/s over fiber. We believe that the 100BASE-FX parts will not work in PTP 650, because of a data rate mismatch, since the PTP 650 Ethernet physical layer for the fiber SFP only transmits and receives serial data at 1.25 Gbit/s. Nevertheless, we have ordered some of these parts in case there is more to this than meets the eye. We'll post the results when the parts arrive.
Please keep us up to date with results of your tests.