Features
Enterasys B5 Gigabit Ethernet Switch Hardware Installation Guide 1-5
Features
High-Speed Stack Connections
Theswitcheshaverear‐panelconnectorsforhigh‐speedconnectionsinastackconfiguration.The
high‐speedstackingcablesusedfortheconnectionsareoptionalitemsandmustbeordered
separately.Stackingcablesareavailableinfourlengths:30centimeters,1 meter,2meters,and5
meters.
See“ConnectingHigh‐Speed
StackingCables”onpage 2‐6fordetailsonthesecables.
Redundant Power Supply Capability
TheB5haspowersupplyredundancycapabilitywhenconnectedtoanoptionalexternal
redundantpowersupply:
•STK‐RPS‐150PS,a102–156wattDCpowersupplyforredundantpowerfornon‐PoEB5
switches.
•STK‐RPS‐500PS,a500wattDCpowersupplyforredundantpowerforPoEB5switches.
Iftheinternal
powersupplyfails,theRPSassumestheentireloadoftheswitchwithout
interruptingnetworktraffic.TheinternalpowersupplyandRPSeachhavetheirownACpower
connection,whichenablestheconnectionofeachpowersupplytoadifferentACpowercircuitfor
additionalACpowersourceredundancy.
Rotary Switch
Currently,therotaryswitchisforfutureuseonly.
PoE (Power over Ethernet) Support
TheB5PoE‐capablemodels(B5G124‐24P2,B5G124‐48P2,B5K125‐24P2,andB5K125‐48P2)are
IEEE802.3afand802.3atcompliant,whichmeanstheycanprovidepoweroverEthernet(PoE)
cableconnectionsfromtheirRJ45connectorstoPDsinthenetwork.
PoE,definedinIEEEstandards802.3afand802.3at,referstothe
abilitytoprovide54Vdc(for
802.3at)or48Vdc(for802.3af)operationalpowerthroughanEthernetcablefromaswitchorother
devicethatcanprovideaPoE‐compliantportconnectiontoapowereddevice(PD).Examplesof
PDsinclude:
•VoiceoverIPdevicessuchasPoE‐compliantdigitaltelephones
• Devices
thatsupportWirelessApplicationProtocol(WAP)suchaswirelessaccesspoints
•Securitycameras
•Virtualdesktops
TheB5PoE‐capablemodelssupportthestandardresistor‐baseddetectionmethod,aswellasAC
disconnectcapability.
Note: Use only the black high-speed stacking cables with B5 switches. Do not use the stacking
cables that were designed for use with other B-Series devices.
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