System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Equipment Management
Page 3-28 Proprietary Information Aastra
This non-volatile memory is composed of two banks, i.e. an active and a
passive bank. The application software is downloaded to the passive bank
via the XMP1 Central Unit.
During the SCU startup process, the application software is loaded to the
RAM of the SCU processor.
With Central Unit redundancy and thus CU-E sub-module redundancy, the
application software of the CU-E is aligned between the active and passive
Central Unit via the internal bus (IB).
SDH database
The SDH database is stored in a RAM located on the CU-E sub-module.
From there it is saved to a battery-buffered flash bank of the Central Unit.
The SDH database can be uploaded and downloaded together with the
PDH database. The data are downloaded always to the passive bank.
An alignment process between the active and passive CU-E ensures data
consistency between the active and passive CU-E sub-module.
3.8.4 Equipment Management
The Equipment Management covers the modules and sub-modules of the
SDH expansion.
These include:
•SCU
•SIFU (2)
• SFP (2), only for SFP-based SIFU
Main functions:
• Module detection
• RID (remote inventory data)
• In-service configuration changes
• Nominal/actual equipment
• Module insertion/extraction detection
• Module insertion or alarm signalling on extraction
• LED management
3.8.4.1 Remote inventory data (RID)
The RID data provide information on modules and sub-modules used in the
SDH expansion. This information can be requested via the NMS.
RID data are available for:
• SCU module
• SIFU sub-module