Zrg800 is like a PON (zrg700) with the addition of video set-top boards like those on the zrg3xx. It has a PON uplink, a local 10/100 network, 2 built-in video decoders, and a 2-port Circuit Emulation board.
Sources for this description
Multiple manufacturers; see the original MIB MIB copies (LibreNMS/Observium Community)