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 1184507L2 Data Networking Overview
OPTI-6100 EFANM w/ Alarms, Provides cooling for the OPTI-6100 MX chassis (P/N 1184501L1) and all of its associated modules, Incorporates a filter, circuit board, and fans to provide forced air ventilation for the OPTI-6100 system