Eci Telecom XDM-100, General Description Manual

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XDM® -100 System Design
417006-2005-013-A02 ECI Telecom Ltd. Proprietary 4-3
4.1.3 NE Software and Configuration Backup
Each MXC unit contains a Non-Volatile Memory (NVM) backup unit that stores a
complete backup of both the system’s software and node configuration. This ensures
that the XDM-100 benefits from superior management and control availability.
Double redundancy for system software and configuration in every shelf is provided
using a redundant NVM unit in the second MXC card.
The MXC enables easy software upgrade using a remote software procedure
operated from the EMS-XDM management station. The card can store several
different software versions at the same time and enables a quick switchover between
the different versions when required.
The XDM-100's control subsystem is separate from the traffic subsystem. In case of
a failure or extraction of the active MXC card, traffic is not impaired if an MXC
protection card exists. In this case, however, the communication capability with the
management station (see Figure 4-1) is switched over to the protecting MXC.
Figure 4-1: Control system block diagram
4.1.4 Built-in Test (BIT)
The BIT hardware and its related software assist in the identification of any faulty
card or module. The BIT outputs provide:
♦
Management reports
♦
Redundancy switching
♦
System reset
♦ Maintenance alarms
♦
Bypass (when applicable)
♦
Fault detection
Dedicated test circuits implement the BIT procedure under the control of an
integrated software package. The MXC card performs BITs on all signal paths and
buses.