Hi Ally,
I'll try and answer all the questions. If I miss something, please come back to us.
The PTP 650 series of Ethernet bridges for unlicensed bands was created and continues to be supported by Cambium Networks. PTP 650 was introduced after we became an independent company, and PTP 650 was never a Motorola product.
PTP 650 has been superseded by PTP 670. It you are purchasing additional links you should look at PTP 670.
A PTP 650 link operates as a transparent Ethernet bridge, meaning that Ethernet frames received at the wired port at one ODU are transmitted unchanged at the wired port on the remote ODU. PTP 650 does not provide any Layer 3 (IP or MPLS) routing capabilities. PTP 650 does not support IGP. I'm not familiar with BEP1 or BEP2; can you provide a reference? Of course, when we say that PTP 650 does not support routing, this does not prevent a wireless link from being used to provide Layer 2 transmission between routers in your network.
PTP 650 provides flexible QoS with eight transmission queues at the wireless port. Frames are classified into queues based on Layer 2 (Ethernet) priority, Layer 3 (IP/MPLS) priority, with spcial treatment for specific Layer 2 Control Protocols. Many more details are provided in the User Guide.
PTP 650 provides a comprehensive set of security features, including AES stream encryption on the wireless interface, HTTPS for web-based management, and SNMPv3. The same set of features are provided in PTP 700, which is approved under FIPS 140-2. Again, more details are in the User Guide, and in the Cambium Community. PTP 670 has some enhanced security features not provided in PTP 650.
PTP 650 supports time synchronization using SNTP.
Operators sometimes use PTP 650 links in a 2+0 arrangement where the two links are on separate frequencies and data traffic is distributed between the two links using an external switch. It would also be possible to operate two links in a 1+1 arrangement, but the time taken to acquire the backup link means that you should expect a downtime of about a minute on a protection switch. In some networks, that downtime would be considered excessive. Also, the logic for protection switching is not provided within the PTP 650 units.
The capacity depends on range, bandwidth, link optimization mode and modulation mode. You can calculate capacity using information in the User Guide, but a more straightforward approach is to model your link using Cambium's free LINKPlanner software.
I hope this helps!
Mark