Multi-mode Optical Module UACC-OM-MM-10G-D: Multi-mode, duplex, ber transceiver module. The 10 Gbps Multi-mode Optical Module is a duplex transceiver that delivers up to 10 Gbps speed over distances up to 300 meters. UACC-OM-MM-1G-D: Multi-mode, duplex, ber transceiver module. The 1 Gbps Multi-mode Optical Module is a duplex transceiver that delivers up to 1.25 Gbps speed over distances up to 550 meters.