Configuring Communication
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Modero VG Series Touch Panels - Instruction Manual
Wireless Settings Page - Wireless Access Overview
IP Routing
The behavior of the wireless routing is largely dependent on the wired network interface. Although the panel can be connected to
two networks simultaneously it may only have one gateway. If the wired network was successfully set up and a gateway was
obtained; then the default route for all network traffic will be via the wired network. In the event that the wired network was not
configured, then the default route for all network traffic will be via the wireless network. The wired network connection always
takes priority.
As an example: Imagine a panel connected to two networks A & B. A is the wired network and B is the wireless network. If the
Master controller is on either of these networks then it will be reached. However if the Master controller is on a different network, C,
then determining which network interface (wired or wireless) that will be used is dependent on the gateway.
Hot Swapping
Hot swapping is not an issue on these panels as the card is installed within the unit and cannot be removed without first removing
the housing.
In the case of DHCP, there must be a DHCP server accessible before the fields are populated.
NOTE: If the SSID (Network Name) and WEP fields have not previously been configured, the Wireless Settings page will not work until
the panel is rebooted.
Ethernet Communication from the panel can be direct (using an Ethernet cable) or indirect (through the optional NXA-PCI80211G
AMX Wireless Card (FG2255-04) communicating to a Wireless Access Point such as the NXA-WAP200G). In determining the
Ethernet method of communication, the panel will always default first to the direct Ethernet communication. If no direct connection
is detected, the panel will first check to see if there is an installed wireless interface card and then communicate to the WAP using
the Wireless Settings assigned within the Wireless Settings page. The WAP communication parameters must match those of the
pre-installed wireless interface card installed within the panel.
Wireless Access Points are the cornerstone of any wireless network. A Wireless Access Point acts as a bridge between a
wired and wireless network. It aggregates the traffic from all the wireless clients and forwards it down the network to the
switch or router. One Wireless Access Point may be all you need. However, you could need more Wireless Access Points
depending on either how large your installation is, how it is laid out, and how it is constructed.
Wireless Equivalent Privacy (WEP) Security is a method by which WLANs protect wireless data streams. A data stream
encrypted with WEP can still be intercepted or eavesdropped upon, but the encryption makes the data unintelligible to the
interloper. The strength of WEP is measured by the length of the key used to encrypt the data. The longer the key, the
harder it is to crack.
802.11b implementations provided 40-bit and 104-bit WEP keys. This is known respectively as 64-bit and 128-bit WEP
encryption. 64-bit is generally not regarded as adequate security protection. Both key lengths are supported by the
Modero product line. Whichever level of WEP you use, it's crucial to use identical settings (CASE SENSITIVE)--the key
length, and the key itself-- on all devices. Only devices with common WEP settings will be able to communicate. Similarly, if
one device has WEP enabled and another doesn't, they won't be able to talk to each other. Although the calculations
required to encrypt data with WEP can impact the performance of your wireless network, it's generally seen only when
running benchmarks, and not large enough to be noticeable in the course of normal network usage.
FIG. 75
Using USB for Virtual Master communication
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