Alcatel 1660SM Technical Handbook page 398

In the transmit path, De–serialise data from Backplane and send it to the STM–1 MAPPER/DEMAPPER"
block.
Control and Status signal processing:
RIBUS I/F provides for power up status/configuration. Also, generation and monitoring of various status
and control signals are done through the ports of RIBUS I/F like read remote inventory data from the
EEPROM
Timing Circuitry
Provides a 19.44 MHz crystal oscillator and a 1:13 clock buffer for providing Reference clocks for the 12
"Clock & Data Recovery" block.
Provides timing circuitry, which includes 622 MHz VCXO and associated circuits for external clock
generation and PLL function
LEDs
Provides one board STATUS LED (refer to Figure 66. on page 156)
Power Supply
The access card receive the following voltage:
– +3.3 Vdc from CONGI to supply the RIBUS I/F block
– 48/60 Vdc from CONGI and generates throught on board DC/DC converters the following voltage:
•
3.3 Vdc
•
2.5 Vdc
•
1.8 Vdc
•
1.5 Vdc
ED
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