[jauer]

Assuming it's PMP100 (PTP100 is essentially the same gear, except a pair of radios dedicated to each other instead of one AP and up to 254 clients).

PMP100 is capable of 14Mbps aggregate, often set to ~10Mbps download, 4 Mbps upload. It's roughly 10 years old at this point. The main benefit over WiFi, Ubiquiti, etc is it uses FSK modulation instead of OFDM so while it is slower it can go farther and tolerate more interference.

Cambium has a newer product, the PMP450, that is capable of quite a bit more throughput. Right now IIRC it does ~125Mbps per sector but using OFDM modulation so you need better signal to noise, usually achieved by limiting distance to clients.

The client radio on PMP100 costs ~$199. Client radios on PMP450 are license keyed by sustained capacity. A radio with 5Mbps sustained is ~$199, but unlocked ~$450 per.

Many Wireless ISPs operate on tight cashflow and have trouble self-funding that with normal residential pricing so they want customers to pay for gear up front and that tends to cost too much for consumers.