Alcatel-Lucent 9500 MPR User Manual page 160

2.8.8.4 Core-E protection
The logic of this protection is distributed in each access and radio peripheral unit. All the switching criteria
coming from both the Core units, are available (via backpanel) to each peripheral in order to allow to each
logic to take the same decision.
Both the Cores (main and spare) send their signals to all the traffic peripherals.
Core protection supports two different types of protection:
– Traffic/services protection (protection of all the transport functions with the exception of the control
platform)
– Control Platform protection
In order to provide this protection the Flash Cards on the two Core boards are kept aligned (in terms of
SW and configuration data) both in case of new operations done by the management systems and in case
of Flash Card replacement.
User Ethernet interfaces protection
In order to support User Ethernet interfaces protection using an external device, the User Ethernet ports
of the Core in standby status are switched off.
The switch on of the User Ethernet interfaces when the Core in standby status becomes active, due to
operator commands or automatic switch, is done within few seconds. In case of Optical Ethernet interface,
the Lambda, Link Length, Connector and Gigabit Ethernet Compliance Code information are read from
the active Core.
TMN Local Ethernet interface protection
In order to support TMN Local Ethernet interface protection using an external device, the relevant Ethernet
port of the Core in standby status is switched off.
The switch on of the TMN Local Ethernet interface when the Core in standby status becomes active, due
to operator commands or automatic switch, is done within 5 seconds.
In order to avoid impact on the Core, the external device used for the TMN Local Ethernet interface pro-
tection is kept separate from the one used for protection of User Ethernet interface.
External synchronization interface protection
The Protection of the external synchronization interface is supported. The output port on the stand-by
Core is muted.
Node-Timed PDH interface protection
In case of node-timed PDH interface the protection of the NE Clock provided by Core is supported.
Core protection restoration mode
The restoration mode is always non revertive: the Core main becomes active as soon as it has recovered
from failure or when a switch command is released.
9500 MPR Rel. 3.1
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