Your question about SiemensS30810-Q2248-X LTUCE

The LTUCE (Line Trunk Unit Control Extended) is the interface between central and peripheral parts of the system. It has an interface to the MTSCG /SICOE and the QDCL boards of both common controls. The transmission mode to and from the common control is balanced. On the peripheral part the LTUCE has an interface to all boards in the shelf with an unbalanced transmission mode. The LTUCE selects the signals from the active common control and distributes them in the LTU-Shelf (LTU-Shelf is a general expression for the peripheral-shelf. It can be one of the compact- or extended compact-shelf). The LTUCE also receives signals from the peripheral boards and transmits them to the common control.

The front panel of the module contains one red and one green LED.