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.DTRHIGH and
.DTRLOW
or
.DTRHIGH.n and .DTRLOW.n
internal events
where n = host port number
The .DTRLOW event occurs automatically on the high to low transition
of the DTR signal on a Host port. The .n indicates the port number. This
may be caused by a cable being removed from a port or by the attached
equipment being switched off.
The .DTRHIGH event occurs automatically on the low to high transition
of this same signal. This can be caused by attaching a cable to a port.
These events can be used to detect if the HP server or host has lost
power, or if the Terminal server has been disconnected from the
maintenance port.
Alarm/Event Action Routine Parameters Comments
.DTRLOW SCHEDULE 2 PHONHOME
.DTRHIGH CANCEL .DTRLOW
This example schedules a PHONHOME to report the alarm two minutes
after DTR is lost (transitions from high to low). If DTR is re-established
(DTR goes high), the .DTRHIGH alarm occurs and cancels the action
PHONHOME Action Routine. Since no port number is specified, this
event will occur when DTR is lost on any port.