... can be used for building point-to-point, chain, star or ring networks, with SNCP features, serving departments of ... · TM, becoming transmission module of a large exchanger, multiplexing 231 E1, and providing 1+1 channel protection to each E1; · ... supply Modes-48V DCTechnical Specification IndexPerformance ParameterSDH InterfaceMax6 STM-1 optical interfaces Connector FC or SCPDH interfaceE1 Spec. ...