User guide

Managing serial console switches 126
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The remaining columns contain strings that represent a portion of the EIA signals of the port:
• TD = Transmit Data DSR = Data Set Ready
• RD = Receive Data DCD = Data Carrier Detect
• RTS = Request to Send RI = Ring Indicator
• CTS = Clear to Send SIG3 = SIG3
• DTR = Data Terminal Ready SIG4 = SIG4
The possible values in each of these columns are:
• On = Power on *On = Power on and value toggled since last poll
• Off = Power off *Off = Power off and value toggled since last poll
Configuring SNMP parameters for serial console switches
SNMP is a protocol used to communicate management information between network management
applications and serial console switches. Other SNMP managers can communicate with your serial
console switch by accessing MIB-II and the public portion of the enterprise MIB. MIB-II is a standard MIB
that many SNMP servers support.