Total Control MP/16, Operator'S Manual

Page: 51 / 182

The NMC MIB 3-15
The NMC's Real-Time Clock
Before setting the NMC's real time clock, it is important to tell the
NMC what time zone it is in to aid in converting times between
local time and Greenwich Mean Time (GMT). This is done by
setting nmcTimezone to the appropriate value. Similarly, the NMC
must be configured as to whether or not to honor daylight savings
time by setting nmcDaySavingTime. With these having been set,
values for nmcCfgSystemTime and nmcCfgSystemDate can be
configured. Both the time and date objects should be set according
to the local time of the NMC's physical location.
The format for the time string is HH:MM:SS where . . .
HH=Hours (0-23)
MM=Minutes (0-59)
and SS=Seconds (0-59)
The format for the date string is MM/DD/YY where . . .
MM=Month (1-12)
DD=Day(1-31)
and YY=Year
An accurate setting of the NMC's real time clock is important if the
Network Manager wants good timestamps in the SNMP Trap
messages sent by the proxy agent. Traps contain a timestamp in
Greenwich Mean Time as an integer indicating the number of
seconds since midnight on January 1, 1970.
Configuring the Console Port for Dial Access
If the Console port is directly connected to the serial port of the
management station, configuration of these objects is probably of
no consequence. However, if the Console port is physically
connected to a modem for dial up access, the following paragraphs
are important.
Whenever the NMC has a SLIP packet that it wishes to transmit
out the Console port, the NMC checks for the presence of Carrier
Detect (CD) on the Console port serial interface. If CD is present, it
is assumed that a connection to the desired destination exists and
the packet is then transmitted. Using a null modem adapter and
directly connecting the WAN port to the DTE port of a
management station results in the management station's Data
Terminal Ready (DTR) signal driving CD, so typically the NMC
sees CD present if directly connected.