Cisco ONS-XC-10G-51.7= Manual De Usuario
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Figure 2 provides a schematic of the SFP transceiver module functional block diagram. The diagram shows the
transmitter, receiver, and electrically erasable programmable read-only memory (EEPROM) storage chip. This block
diagram is intended for informational purposes only and does not illustrate design requirements.
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Transmitter: In the transmit direction, the SFP transceiver module receives the electrical signal and transmits
this data in an optical signal by using a laser driver that controls the laser diode. The optical output power is
held constant by an automatic power control circuit.
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Receiver: In the receive direction, the SFP transceiver module receives an NRZ optical signal and converts it
to an electrical equivalent. The receive portion of the module uses an amplifier to control the converted
electrical signal.
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EEPROM: This type of SFP transceiver is identified by the standard two-wire serial interface used in
EEPROM with an I2C interface (with serial ID functions) that is part of the GBIC specifications and the SFF-
8472 MSA. In addition, EEPROM offers an enhanced monitoring interface for optical transceivers as
described in SFF-8472, which allows real-time access to the device to allow monitoring of the physical
parameter such as received optical power, laser bias current, and laser optical output power.
Figure 2. SFP Module Block Diagram