User's Manual

Planning the Installation

Part No. 430-4G-200-00-000

2-11

Figure 2-3: Network Topologies - Star and Daisy Chain Configurations

Star Daisy Chain

2.6.3. E

THERNET

If your system is to be configured for use over Ethernet, the wiring will be slightly

different. Communication cables for Ethernet logically form a straight line bus but the

more devices on that bus, the less efficient the network becomes due to increased

collisions, and the weaker the signal will get over distance. Repeaters can be used to

boost the signal strength; however, a better solution is to place switches at intermediate

positions along the bus. The most common Ethernet topology in use today is the star

configuration with a hub or switch in the center.

The device on the end of the network should be terminated with a 120 ohm

resistor.

NOTICE

2.6.4. WIRELESSNETWORK DESIGN CONSIDERATIONS

A wireless network of V-Station 4G and V-Flex 4G devices offers several advantages

over wired networks, such as convenience, speed of installation, and less wiring. If you

are planning to design a wireless network, consider these points:

Wireless signal interference - Metal masses such as HVAC ducts, fire doors, vents,

stairs, etc. disrupt wireless signals. Building and stairwell structures, as well as internal

building walls, also impede wireless signals. Some electrical equipment, such as

microwaves, large-screen TVs, cordless telephones are also known to affect wireless

signals. Consider the proximity of devices to these objects.

Distance from access points - How far a device is from the closest access point plays a

major factor in determining the stability and strength of the wireless signal.

Multiple Access Points - "Repeaters" or multiple access points can solve signal strength

problems that may be caused by either distance or loss due to interference.