Alcatel 1660SM Technical Handbook page 526

TX side functions
•
Serializer: SERDES block de–serialize the signal coming from the two MATRIXE (H, L, X links
at 2.5 Gibit/s ) into 16x622 Mb/s signals forwarded to G.A.#1 – G.A.#9.
•
TTF function (64 x SA, MST Source, RST Source ). These functions are performed by GA #1
•
LVC (lower order path ) function: us above mentioned 8 G.A. ( G.A.#2 to G.A.#9 ) are present
in order to process the SDH signal at low order level.
•
Multiplexing from 32 x 311 Mbit/s to 16 x 622 Mbit/s by means of a 2:1 MUX device
•
Multiplexing from 16 x 622 Mbit/s to 9.95328 Gbit/s by means of a 16:1 MUX device;
•
Electrical to Optical conversion at 9.95328 Gbit/s bit rate; at the output side the command
LASER OFF , switch off the LASER
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:
– + 3.3 V
– 1.8 V
– 1.7 V
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