Equipment protection
...................................................................................................................................................................................................................................
Supported protection mechanisms
Metropolis
®
AMU provides the following equipment protection mechanisms (main
board based)
•
1+1 revertive equipment protection of the cross-connection function
•
Equipment protection of the power supply filter function
•
Equipment protection of the timing function
Equipment protection of cross-connection and timing function
If two units are present in the system an automatic protection switch relation can be set
up by the user. The switching is revertive. This means that the service returns to the
Main board 2 when both boards are working. Manual operation of the protection is
supported and the unprotected operation is possible as well. The traffic interruption
time is less than 50 ms with manual switch commands and less than 50 ms plus the
detection time for automatic protection switches triggered by a failure. The unit that is
not active can be pulled or replaced without causing bit errors in the traffic.
Important! Please note that the CIT, EOW, Q-LAN and MDI/MDO interfaces on
the Main board 2 are not operational.
Equipment protection of the power filter function
If two units are present in the system, both power filter parts are active.
Features
...................................................................................................................................................................................................................................
3-18
Lucent Technologies - Proprietary
See notice on first page
365-312-847R4.0
Issue 4, November 2006