Is the Tellabs 5210-0148 Rev 2 ONT GPON or BPON
A quick Web search tells me that the ONT is GPON. Another way to tell is if the ONT features a gigabit Ethernet port. Most BPON ONTS do not have more than 100Mbps out.
**bleep**, your googlefu beat mine. I could only find resellers and they didn't specify B or G. http://www.dslreports.com/faq/16637 didn't have it listed. Did you have a specific link?
You have a Tellabs 612A ONT which is B-PON.