56 VNX5700 Hardware Information Guide
I/O modules
Note: The Lucent Connector (LC) type interface was developed by Lucent Technologies 
(hence, Lucent Connector). It uses a push-pull mechanism. LC connectors are normally 
held together in a multimode duplex configuration with a plastic clip. These cables are 
usually colored orange with the duplex connectors encased in a gray plastic covering. To 
determine the send or transmit (TX) and receive (RX) ferrules (connector ends), these 
cables will show a letter and numeral (for example A1 and A2 for the TX and RX, 
respectively) or a white and yellow rubber gasket (jacket) for the send or transmit (TX) and 
receive (RX) ends.
Four-port 8-Gb/s FC I/O module LEDs
The four-port 8-Gb/s Fibre Channel (FC) I/O module has two different types of status LEDs. 
Figure 48 shows the LEDs and Table 29 describes them.
Figure 48  Four-port 8-Gb/s FC I/O module LEDs
18. Be careful when replacing or swapping out SFP+ modules, the Data Mover will lose access to the 
SP or tape drive to which it is connected.
Link/Activity
LED
Power/fault
LED
Link/Activity
LED
Link/Activity
LED
Link/Activity
LED
CNS-001670
Table 29  Four-port 8-Gb/s FC I/O module LEDs
LED Color State Description
Power/Fault Green On I/O module is powered up.
Amber On I/O module has faulted.
— Off I/O module is powered down.
Link/Activity 
(each port 
has one 
LED)
Green On 2- or 4-Gb link speed (suboptimal speed)
Blue On 8-Gb/s link speed (maximum speed)
Green or 
Blue
Blinking Small form-factor pluggable (SFP+
1
) transceiver module 
faulted, unsupported, or optical cable fault.
— Off No network connection