Alcatel 1660SM Technical Handbook page 517

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
– 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.
•
TONE MODULATOR MANAGEMENT
This block is used by the STM–16 optical port with "192.3 to 195.7" indication. In this block
is present a"WDM tone generator", which starting from the data written in the remote inventory,
fix the appropriate wavelength transmitted to the WDM equipment.
•
REMOTE INVENTORY
It is the memory containing the board information, for identification purposes (see para. 3.17
on page 370 for details) and additional data for operation of the board in WDM application.
•
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
– – 5 V
– + 5 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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