Cisco ONS-SE-GE-ZX-RF Hoja De Datos
Data Sheet
© 2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
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Figure 2. SFP Module Block Diagram
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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 a nonreturn to zero (NRZ) optical
signal and converts it to an electrical equivalent. The receive portion of the module will use some kind of
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 support monitoring of received optical
power, laser bias current, laser optical output power, etc.
XFP Module
The XFP transceiver module (Figure 3) is a bidirectional device with a transmitter and receiver in the same physical
package. The XFP module contains a 30-pin surface mount connector on the electrical interface and a duplex LC
connector on the optical interface.