Integrator's Manual

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5.2.2 Avoiding IP Address conflicts
When building a system that is comprised of a mixture of cards from different sources, there is a
possibility that some of the cards will have duplicate IP addresses, thereby making
communication with these cards unreliable.
There are two recommendations for addressing this problem. The first is to use a DHCP server
to ensure that each card gets a unique address. The second is to use the web interface on the
COM24 cards to change the IP address of one of the duplicate cards (refer to Section 6.8.1 for
more information).
It should also be noted that, depending upon your computer‟s network configuration, attempting
to access a property‟s wireless network at the same time you are accessing the COM24 cards
could also give the undesirable result of not being able to navigate to your COM24 cards with
the web browser. If you are suddenly unable to even see your COM24 cards in a system that was
not previously exhibiting any IP address conflicts, you may wish to disable the wireless interface
temporarily and see if that helps.
5.3 Using a TFTP Server
While you do have the option of using your choice of either FTP or TFTP to transfer data
between the management PC and the COM1000 system, it is recommended that you use a TFTP
program.
The reason is that TFTP is greatly simplified over FTP, the biggest difference being that it does
not require user/password authentication, which are not necessary to access the COM1000
system in the first place.
Note: This section will be describing procedures specific to the previously mentioned Tftpd32.
5.3.1 Determining Your IP Address
In order to configure your TFTP server properly, you first need to know the IP address that your
computer is using to communicate with the COM24 cards.
The following steps describe a fairly simple process that will be useful in determining where to
send file transfers containing software upgrades (see Section 7) and also where to direct
streaming video to test your system (see Section 6.8.1).
As seen in Figure 14, you will first need to access the Start Menu and select the “Run…” option.
Type “cmd” in the small window that comes up and press the OK button.