DPS Telecom D-PK-NGDLT, Руководство пользователя

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NetGuardian LT G2 will declare an alarm in the absence of the active-high signal, creating the practical
equivalent of an active-low alarm.
·
If the alarm input generates an active-low signal, switching to Reversed operation means the
NetGuardian LT G2 will declare an alarm in the absence of the active-low signal, creating the practical
equivalent of an active-high alarm.
· If the alarm input is normally open, switching to Reversed operation converts it to a normally closed
alarm point.
· If the alarm input is normally closed, switching to Reversed operation converts it to a normally open
alarm point.
SNMP FAQs 16.2
Q. Which version of SNMP is supported by the SNMP agent on the NetGuardian?
A.
SNMPv1, SNMPv2c and v3.
Q. How do I configure the NetGuardian LT G2 to send traps to an SNMP manager? Is there a
separate MIB for the NetGuardian LT G2? How many SNMP managers can the agent send traps
to? And how do I set the IP address of the SNMP manager and the community string to be used
when sending traps?
A. The NetGuardian begins sending traps as soon as the SNMP managers are defined. The NetGuardian MIB is
included on the NetGuardian Resource CD. The MIB should be compiled on your SNMP manager. (
Note:
MIB versions may change in the future.) The unit supports 2 SNMP managers, which are configured by
entering its IP address in the Trap Address field of Ethernet Port Setup. You can also configure up to eight
secondary SNMP managers, which is configured by selecting the secondary SNMP managers as pager
recipients. Community strings are configured globally for all SNMP managers. To configure the community
strings, choose System from the Edit menu, and enter appropriate values in the Get, Set, and Trap fields.
Q. Does the NetGuardian LT G2 support MIB-2 and/or any other standard MIBs?
A.
The NetGuardian LT G2 supports the bulk of MIB-2.
Q. Does the NetGuardian LT G2 SNMP agent support both NetGuardian LT G2 and T/MonXM
variables?
A. The NetGuardian LT G2 SNMP agent manages an embedded MIB that supports only the NetGuardian LT
G2's RTU variables. The T/MonXM variables are included in the distributed MIB only to provide SNMP
managers with a single MIB for all DPS Telecom products.
Q. How many traps are triggered when a single point is set or cleared? The MIB defines traps like
"major alarm set/cleared," "RTU point set," and a lot of granular traps, which could imply that
more than one trap is sent when a change of state occurs on one point.
A. Generally, a single change of state generates a single trap.
Q. What does "point map" mean?
A.
A point map is a single MIB leaf that presents the current status of a 64-alarm-point display in an ASCII-
readable form, where a "." represents a clear and an "x" represents an alarm.
Q. The NetGuardian LT G2 manual talks about control relay outputs. How do I control these from my
SNMP manager?
A. The control relays are operated by issuing the appropriate set commands, which are contained in the DPS
Telecom MIB.
Q. How can I associate descriptive information with a point for the RTU granular traps?
A.
The NetGuardian LT G2 alarm point descriptions are individually defined using the Web Browser.