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 1184560P1 Data Networking Overview
The 1-Port OC-48 Long Reach SFP Module plugs into ADTRAN OC-48 modules designed to accept Small Form-Factor pluggable. Installed into an appropriate host module, the 1-Port OC-48 Long Reach SFP Module provides an OC-48 interface to the supporting system.