System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Design of the SDH Expansion
Page 3-4 Proprietary Information Aastra
The SCU-B board includes the SCP ASIC (SDH Core Processor ASIC), the
2 Mbit/s Tributary ASIC (P12LPU), the interface to the XMP1 PDH system
as well as a processor (PUC) for controlling the module. Furthermore, it
provides a line interface as well as external and internal 2 Mbit/s interfaces.
A second SCU-E board provides an additional line interface as well as
internal and external 2 Mbit/s interfaces. This board also includes the 60 V
voltage converters required to generate the necessary operating voltages.
Module protection can be configured by means of a second SCU module.
This second module is mounted in an adjacent card slot of the
XMP1 subrack. The two SCU modules are interconnected by a common
SCU-FP front panel.
CU-E (Central Unit Expansion)
The CU-E (Central Unit Expansion) sub-board is an expansion module for
the Central Unit of the node. It provides the control functions and
management interfaces to the SCUs (SDH Core Units).
CU-E
Central Unit