Emerson Liebert ICOM-DO Service Manual download pdf (Page 167)

iCOM

Controls Training and Service Manual

166

Switches perform the same mechanical function, but they also include software

inside that allows communication to operate at faster speeds and allow for multiple

unit communication. Switches are the latest technology, but you are safe to use

either device.

Hubs are available in different

configuration, with 4, 8, 12, 15 or 24 RJ-

45 connections. You can plug in the

RJ45-connector into a hub while the

network is running on the other connected

systems, allowing you to move / add

systems without having to shutdown the network.

As network grow, you may need a second hub:

UNIT IDENTIFICATION OR ADDRESSING

The units are separated and identified through their TCP/IP address. TCP/IP

refers to the protocol or language being used to communicate between the

Environmental Units. The addresses are arranged in 32-bit numbers. To make it

easier to memorize such IP-addresses, they are usually expressed as 4 8-bit

numbers (example: 192.168.10.1), where each of the 4 numbers is within the

range of '0' to '255' (there are restriction on using '0' and '255', avoid using them.)

When setting up a small private network, you are free to use ANY IP-

address, however, when you are connected to a company network, you need

to ask the Network-administrator to assign you an IP-address. And if you are

connected to the Internet, your ISP (Internet Service Provider) will assign an

IP-address to you.

Even if a network is NOT connected to the Internet, it has become custom to use

on private networks a range of IP-addresses, which are reserved for private

networks (that makes it later possible to connect your private network to the

Internet without having to re-configure everything). The reserved IP-address is:

192.168.x.y, where x=same number on all systems and y=different/unique number

on all systems.

See the example above under HUBS AND SWITCHES for an example of this

configuration.

ital

192.168.168.1

192.168.168.3

Twisted pair - 10baseT - UTP Cable

192.168.168.2

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Emerson Liebert ICOM-DO Service Manual Page 167