Black Box DESKTOP TELCO Especificaciones descargar pdf (Pagina 7)

Ring Topology

Bus.

A bus topology consists

of one continuous cable,

commonly called the backbone

cable. Devices are connected

along that cable, and informa-

tion travels in a linear fashion

along the entire length of the

bus. Devices can be removed

from the bus without disrupting

the entire network. The original

Ethernet topology was a bus.

There are three basic network topologies: star, ring, and bus.

Star.

The star network features individual point-to-point cable runs

radiating from a central equipment room, which can house a PBX

in voice networks or switches in data networks. The advantage of

a star network is that you can connect and disconnect equipment

without disrupting the rest of the network. The star network

facilitates smooth moves, adds, and changes. 10BASE-T and

later versions of Ethernet use a star topology.

The TIA/EIA makes a few design recommendations for

star topologies.

• There shall be no more than two hierarchical levels

of backbone cross-connects.

• Bridged taps and splices shall not be installed.

• Proximity to sources of EMI shall be taken into account.

• Grounding should meet J-STD-607-A requirements.

NOTE: The TIA/EIA has two basic categories of recommendations:

mandatory and advisory. Mandatory criteria are designated by the

word “shall.“ So if you see the word shall, pay attention. Advisory

criteria are recommended, but not absolutely necessary.

Ring.

A ring topology links a series of devices in a continuous loop.

A ring is a simple network, but it has a few disadvantages. All the

signals are passed from one device to the next until they reach the

intended station.

724-746-5500 • blackbox.com

Networking

Bus Topology

Star Topology

Network topologies

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