73
Frequently Asked Questions
16
Here are answers to some common questions from NetGuardian LT G2 users. The latest FAQs can be found on
the NetGuardian LT G2 support web page,
http://www.dpstelecom.com.
If you have a question about the NetGuardian LT G2, please call us at
(559) 454-1600
or e-mail us at
General FAQs
16.1
Q. How do I telnet to the NetGuardian LT G2?
A.
You must use
Port 2002
to connect to the NetGuardian LT G2. Configure your Telnet client to connect using
TCP/IP (
not
"Telnet," or any other port options). For connection information, enter the IP address of the
NetGuardian LT G2 and Port 2002. For example, to connect to the NetGuardian LT G2 using the standard
Windows Telnet client, click Start, click Run, and type "telnet <NetGuardian LT G2 IP address> 2002."
Q. How do I connect my NetGuardian LT G2 to the LAN?
A.
To connect your NetGuardian LT G2 to your LAN, you need to configure the unit IP address, the subnet mask
and the default gateway. 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
Save your changes by writing to NVRAM and reboot. Any change to the unit's IP configuration requires a
reboot.
Q. When I connect to the NetGuardian LT G2 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. Your COM port settings should read:
Bits per second:
9600 (9600 baud)
Data bits:
8
Parity:
None
Stop bits:
1
Flow control:
None
Important!
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 LT G2.
Q. The LAN link LED is green on my NetGuardian LT G2, but I can't poll it from my T/Mon.
A.
Some routers will not forward packets to an IP address until the MAC address of the destination device has
been registered on the router's Address Resolution Protocol (ARP) table. Enter the IP address of your
gateway and your T/Mon system to the ARP table.
Q. What characteristics of an alarm point can be configured through software? For instance, can point
4 be used to sense an active-low signal, or point 5 to sense a level or an edge?
A.
The unit's standard configuration is for all alarm points to be level-sensed. You
cannot
use configuration
software to convert alarm points to TTL (edge-sensed) operation. TTL alarm points are a hardware option
that must be specified when you order your NetGuardian LT G2. Ordering TTL points for your NetGuardian
LT G2 does not add to the cost of the unit What you can do with the configuration software is change any
alarm point from "Normal" to "Reversed" operation. Switching to Reversed operation has different effects,
depending on the kind of input connected to the alarm point:
·
If the alarm input generates an active-high signal,
switching to Reversed operation means the
Summary of Contents for D-PK-NGDLT
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