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Configuring Communication
101
VG-Series Modero Touch Panels
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.
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.
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.