60
•
•
Table 29 SFP28 transceiver modules available for the SFP28 ports
Product
Code
Description
Central
wavelength
(nm)
Fiber
diameter (µm)
Modal
bandwidth
(MHz*km)
Maximum
transmission
distance
JL293A
HPE X190 25G
SFP28 LC SR
100m MM XCVR
850
Multi-mode,
50/125
2000
•
FEC
negotiation
disabled: 30 m
(98.43 ft)
•
FEC
negotiation
enabled: 70
(229.66 ft)
4700
•
FEC
negotiation
disabled: 40 m
(131.23 ft)
•
FEC
negotiation
enabled: 100 m
(328.08 ft)
NOTE:
For more information about FEC negotiation, see Ethernet interfaces in
HPE FlexFabric 5950
Switch Series Layer 2 –LAN Switching Configuration Guide
.
Table 30 SFP28 copper cables available for the SFP28 ports
Product Code
Description
Cable length
JL294A
HPE X240 25G SFP28 to SFP28 1m DAC 1 m (3.28 ft)
JL295A
HPE X240 25G SFP28 to SFP28 3m DAC 3 m (9.84 ft)
LEDs
System status LED
The system status LED shows the operating status of the switch.
Table 31 System status LED description
LED mark
Status
Description
SYS
Steady green
The switch is operating correctly.
Flashing green
The switch is performing power-on self test (POST).
Steady red
The system has failed to pass POST or has problems such as fan
failure.
Flashing blue (3 Hz)
Helps you to locate the switch.
To locate the switch in the rack, execute the
locator blink
blink-time