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 1184544L1 Data Networking Overview
The OC-12 Tributary Module provides an OC-12 tributary interface to the chassis. The OC-12 Tributary Module can map and retime one STS-12C, or up to four STS-3Cs, twelve STS-1s, or 336 VT1.5s from the OC-12 interface to the Optical Multiplexer (OMM) Modules.