Parameter Specifications
Reliability MTBF 355,178 hours
NOTE: The table below represents the DC PSU’s capabilities and does not represent S4820T
operation.
The power supply operates within all specified limits over the following input voltage range.
Table 9. DC Input Specification
Parameter Specifications
Min/max input voltage range −40.5V /−48V/ −60V
Maximum power consumption
Typical power consumption
800 Watts
338 Watts
Input power at full load
−40.5V/970W −48V/930W −60V/950W (without
fans)
−40.5V/980W −48V/940W −60V/960W (with fans)
Input current at full load
−40.5V/23.8A −48V/19.0A −60V/15.6A (without
fans)
−40.5V/24A −48V/19.2A −60V/16.0A (with fans)
Start up VDC 39.0 +/− 1.5V
Start off VDC 37.5 37.5 +/− 1.5V
IEEE Standards
The S4820T switch complies with the following IEEE standards:
• 802.1AB LLDP
• 802.1ag Connectivity fault Management
• 802.1D Bridging, STP
• 802.1p L2 Prioritization
• 802.1Q VLAN Tagging, Double VLAN Tagging, GVRP
• 802.1s MSTP
• 802.1w RSTP
• 802.3ab Gigabit Ethernet (1000BASE-T)
• 802.3ac Frame Extensions for VLAN Tagging
• 802.3ad Link Aggregation with LACP
• 802.3ae 10 Gigabit Ethernet (10GBASE-X)
• 802.3ba 40 Gigabit Ethernet (40GBase-SR4, 40GBase-CR4) on optical ports
• 802.3u Fast Ethernet (100BASE-TX)
• 802.3x Flow Control
• 802.3z Gigabit Ethernet (1000BASE-X)
• ANSI/TIA-1057 (LLDP-MED)
48
Technical Specifications
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