DBC Network Bridge

Communications between networks is allowed, but requires the use of a special piece of equipment called an IP Router. The router acts as a Gateway to allow this communication to exist. Any data traffic that is to go to the other network is routed through the IP Router. The CobraNet data is held behind but IP data goes through.

Each IQ Component has three identifiers that are used in the TCP/IQ system:

•Media Access Control (MAC) Address

•Internet Protocol (IP) Address

•IQ Address

Let’s explain each identifier.

Media Access Control (MAC) Address: This is a physical address that specifies a specific physical network component. This address is predefined during manufacture and cannot be modified. No two network components have the same MAC address and each component is uniquely identified by its MAC address. This 48 bit address is located on the outside of every IQ component and is shown in hexadecimal for- mat as 6 two-byte octets such as: 00-0A-40-00-DC-2F

Internet Protocol (IP) Address: The IP address of a component is assigned during the setup of the network and identifies the IQ compo- nent to a larger audience. Because the MAC address is limited to a sin- gle physical LAN, communications between LANs is impossible solely through the use of the MAC address. The IP address allows compo- nents and controllers on other networks to communicate with each other through the use of an IP Router as shown in Figure 8.2.

This allows the network designer to isolate network traffic from each other. For example, when using wireless devices to control IQ compo- nents, the bandwidth limitation of wireless devices will not allow them to reside on the same network with CobraNet. As a result, the use of an IP router and a separate network allows the wireless controllers to access the IQ components through the router using IP addressing. The IP address appears as four numbers (0-255) separated by periods, such as: 126.126.0.1

IQ Address: TCP/IQ components will be addressed with a unique number from 1 to 65,535 and are assigned within the IQ software. A separate utility is then run which queries the network and establishes what IQ components and their associated MAC addresses are present. An IP Address and IQ Address can then be assigned to each IQ compo- nent.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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100Mb Switch

IP Router

100Mb Switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Wireless

Access Point

Wireless

PDA

Devices

 

Figure 8.2 Multiple Network Communication Via an IP Router

Operation Manual

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Image 77
Crown 137769-3 operation manual Multiple Network Communication Via an IP Router
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137769-3 specifications

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