Alcatel 1660SM Technical Handbook page 523

Other functions implemented are :
•
RIBUS I/F
This block is used to:
– read/write from/to the "RIBUS" stream
– control the LED on the unit
– control the SERDES SETTINGS device (sending configuration etc.)
– release the Management–bus in case of power failure
– read remote inventory data.
RIBUS I/F is powered by the + 3.3 Vdc supply by CONGI boards.
•
REMOTE INVENTORY
It is the memory containing the board information, for identification purposes (see para. 3.17
on page 370 for details)
•
M–BUS Driver
It drives the input–output gates of the Management–bus. These drivers can be disabled (by
the Bus–OFF signal) in case of power failure.
•
DC/DC CONVERTERS
This block converts the 48/60 V power supply to the following voltages:
– + 2.5 V
– + 3.3 V
– 1.8 V
– 1.2 V
The DC/DC converter is synchronized with a synchronization clock at 300 MHz (signal Power
Sync) , generated by G.A.#1) in order to avoid EMI problems.
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