Specifications

5
Hardware Management
68
Table 20summarizestheSOLserialportconnections.
CabledetectionisprovidedbyanIntersilISL4243ERS‐232transceiver.WhenvalidRS‐232
signallevelsatthefrontconnectoraredetected,thetransceiverassertsthe
COM1_CBLDETsignal(high)toCOMuxCPLDandtheIPMC.
InSOLmode,anyoutgoingcharactersfromtheICHareassembledintopacketsbythe
IPMCandsenttotheremoteconsoleoveroneoftheBaseLANinterfaces.Conversely,
inboundLANpacketscarryingcharactersforthe systemserialcontrollerhavetheir
characterdataextractedbytheIPMCanddeliveredtothebaseboardserialcontroller.
TheSOLcharacterdataiscontainedinSOLmessagescarriedinUDPdatagrams.The
packetformatis“IPMIv2.0RMCP+”withthepayloadtypesetto“SOL”.
Note:TheCPMsupportsoneSOLsessionatatime.Thesessionmustbeclosedbefore
anothersessioncanbeopened(throughtheotherBaseinterfacechannelorthefront/
rearEthernetinterfacechannel).
Table 20. Truth table for serial port connections
Control inputs Port connections
Front cable
detect
RTM cable
detect
COM1
GPIO
Super I/O COM1
connection
Super I/O COM2
connection
IPMC SOL port
connection
0 0 0 IPMC SOL N/C COM1
0 0 1 N/C IPMC SOL COM2
0 1 x N/C Rear SFP Snoop COM2
1 0 x Front RJ-45 N/C Snoop COM1
1 1 0 Front RJ-45 Rear SFP Snoop COM1
1 1 1 Front RJ-45 Rear SFP Snoop COM2