The Adtran OPTI-MX module provides a DS3 or EC1 tributary payload from the OPTI-MX system. The signal is made available through one of the in and out BNC pairs on the OPTI-MX chassis.
Adtran 1184530G2 Data Networking Overview
OPTI-6100 Eight-Port 100/1000 Advanced Ethernet SFP Module, Maps/demaps up to 1.2 Gbps bandwidth (STS1-24v rate) between the backplane and eight front-access Ethernet ports