DPS Telecom NetGuardian 832A G5 User Manual page 127

alarm point) to the most general (an entire monitored device). An alarm point is a number
representing an actual contact closure that is activated when an alarm condition occurs. For
example, an alarm point might represent a low oil sensor in a generator or a open/closed sensor in a
door. A display is a logical group of 64 alarm points. A port is traditionally the actual physical serial
port through which the monitoring device collects data. The address is a number representing the
monitored device. The terms port and address have been extended to refer to logical, or virtual,
ports and addresses. For example, the NetGuardian reports internal alarms on Port 99, address 1.
Q. What characteristics of an alarm point can I configure through software? For instance, can I
configure Point 4 to sense an active-low (normally closed) signal, or Point 5 to sense a level
or edge?
A. The NetGuardian alarm points are level sensed and can be software-configured to generate an
alarm on either a high (normally open) or low (normally closed) level.
Q. When I connect to the NetGuardian through the craft port on the front panel it either
doesn't work right or it doesn't work at all. What's going on?
A. Make sure your using the right COM port settings. The standard settings for the craft port are 9600
baud, 8 bits, no parity, and 1 stop bit. Flow control must be set to none. Flow control normally
defaults to hardware in most terminal programs, and this will not work correctly with the
NetGuardian.
Q. I just changed the port settings for one of my data ports, but the changes did not seem to
take effect even after I wrote the NVRAM.
A. In order for data port and craft port changes (including changes to the baud rate and word format) to
take effect, the NetGuardian must be rebooted. Whenever you make changes, remember to write
them to the NetGuardian's NVRAM so they will be saved when the unit is rebooted.
Q. How do I get my NetGuardian on the network?
A. Before the NetGuardian will work on your LAN, the unit address (IP address), the subnet mask, and
the default gateway must be set. A sample configuration could look like this:
unit address: 192.168.1.100
subnet mask: 255.255.255.0
Default Gateway: 192.168.1.1
Always remember to save your changes by writing to the NVRAM. Any modifications of the
NetGuardian's IP configuration will also require a reboot.
Q. Does the PPP allow upload of new firmware over PPP?
A. The NetGuardian supports all PPP upload capabilities with the exception of firmware.
Q. I'm using HyperTerminal to connect to the NetGuardian through the craft port, but the unit
won't accept input when I get to the first level menu.
A. Make sure you turn off all handshaking in HyperTerminal.
Q. I can't change the craft port baud rate.
A. Once you select a higher baud rate, you must set your terminal emulation to that new baud rate and
enter the DPSCFG and press Enter escape sequence. The craft port interprets a break key as an
override to 9600 baud. At slower baud rates, normal keys can appear as a break.
Q. The LAN line LED is green on my NetGuardian, but I can't poll it from my T/MonXM master.
A. Some routers will not forward to an IP address until the MAC address has been registered with the
router. You need to enter the IP address of your T/MonXM system or your gateway in the ping table.
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