Ethernet Switches - NorthStar 972 Installation Manual

Number of devices
The initial survey should also determine whether or not an Ethernet switch will be needed. A switch
is only necessary if the installation includes more than two devices. For example, networking two
972s and radar requires a switch.
Connecting a network of two devices
The simplest way to interconnect a network consisting of just two devices is to use an Ethernet
"crossover" cable. A crossover cable eliminates the need for an Ethernet switch.
Connecting a network of more than two devices
When more that two devices are being connected, or if you wish to leave room for future expansion,
use an Ethernet switch that serves as a common connection point for all devices. Never use crossover
cables with a switch.

Ethernet Switches

Ethernet switches allow for the interconnection of more than two devices. Each device can exchange
data with any other device connected to the switch.
Any standard 10/100 Mbit Ethernet switch can be used. These devices generally come with a "Wall
Wart" type of a power adapter which is plugged into a 110V AC power outlet.
The Northstar 972 has been tested with the following Ethernet switches using standard Category 5
cables:
Manufacturer
Netgear
ADAM
972 Installation Manual, Rev. B
Model Northstar P/N
FS108
6520 SW103
Speed(Mbits) Ports
10/100 Auto 8
5
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