Configuring Ethernet Parameters; Auto-Negotiation; Full-Duplex/Half-Duplex; Speed - Avaya c360 Installation And Configuration Manual

Figure 20: maximum Ethernet Cable Lengths
1000 BASE-ELX
1550 nm
1000 BASE-LX
1300 nm
1000 BASE-SX
850 nm
10/100BASE-FX
1000 BASE-T
10/100BASE-T

Configuring Ethernet Parameters

Auto-Negotiation

Auto-Negotiation is a protocol that runs between two stations, two switches or a station and a
switch. When enabled, Auto-Negotiation negotiates port speed and duplex mode by detecting
the highest common denominator port connection for the endstations. For example, if one
workstation supports both 10 Mbps and 100 Mbps speed ports, while the other workstation only
supports 10 Mbps, then Auto-Negotiation sets the port speed to 10 Mbps.
For Gigabit ports, Auto-Negotiation determines the Flow Control configuration of the port.

Full-Duplex/Half-Duplex

Devices that support Full-Duplex can transmit and receive data simultaneously, as opposed to
half-duplex transmission where each device can only communicate in turn.
Full-Duplex provides higher throughput than half-duplex.

Speed

The IEEE defines three standard speeds for Ethernet: 10, 100 and 1000 Mbps (also known as
Ethernet, Fast Ethernet and Gigabit Ethernet respectively).
{
50µ Multi-mode
62.5µ Multi-mode
{
50µ Multi-mode
62.5µ Multi-mode
9µ Single-mode
100 m 275 m
LANs Building Backbones
9µ Single-mode
9µ Single-mode
550 m
Ethernet
2 km 5 km 10 km 70 km
Campus Backbone
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