19.3.1
SNMP System Information
The SNMP System Information section shows the network/device data specifically made
available to the SNMP manager for making the device, its location and service manager(s)
traceable.
19.3.2
SNMP Communities
The community strings (names which can be regarded as passwords) in the SNMP
Communities section must conform to those configured in the SNMP manager. Often, these
are 'public', mainly used for the read and trap communities, and 'private' or 'netman', for
read-write operations. The manager program may offer additional choices.
19.3.3
SNMP Agent
The module has an SNMP Agent running which listens for information requests from the SNMP
manager on port 161 by default.
19.3.4
SNMP Traps
A BC840-MC alarm status change generates a trap which can be caught by any SNMP
manager. The BC840-MC can, for example, send traps on the occurrence of Image Quality
and Camera Tampering events. Variables, which can be read from the BC840-MC's MIB
through an SNMP manager, indicate why the alarm occurred. The OPTC-VCA-MIB required for
this can be downloaded, together with the other BC840-MC MIBs, at www.tkhsecurity.com/
support-files.
Note that Version and Destination IP : port are required fields.
Item
Description
Version
The SNMP version used.
Destination IP : port
The IP address associated with the manager program, and the
destination port (162 is the default port).
Alternative
destination IP : port
If desired, an alternative destination IP address and port can be
added.
Enable authentication
trap
It is possible to add an authentication trap to be able to catch
attempts at access using the wrong community string.
19.3.5
Polling
Depending on facilities offered by the SNMP manager, a number of variables can be read out
and in a few cases be edited and set. The Ethernet port variables are contained in the 'system'
and 'interfaces' sections of RFC 1213-MIB.
Device Management
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