| Author: Vidhya 06 Sep 2008 | Member Level: Gold | Rating: Points: -20 |
hi,
Traditional Ethernet networks (10BASE-T) operate at 10 Mb/s Ethernet
protocol, as described by IEEE Standard 802.3; the majority of Ethernet
interfaces currently operate at this data rate. However, a newer Ethernet
standard, under IEEE standard 802.3u, accomplishes the faster operation of
100 BASE-T systems, at a 100 Mb/s data rate (i.e., a 125 Mb/s encoded bit
rate) using unshielded twisted pair (UTP) physical media. The 100 BASE-T
standard defines operation over two pairs of category 5 UTP (100 BASE-TX)
or category 3 UTP. The 100 BASE-FX network medium, covered by the 100
BASE-T standard, allows operation over dual fiber optic cabling.
Ethernet protocol provides for a Media Access Control (MAC), enabling
network interface devices at each network node to share accesses to the
network medium. One type of connection, termed a Media Independent
Interface, or MII, connects the MAC to a physical layer (PHY) transceiver
configured for a particular network medium, e.g., 10 BASE-T, 100 BASE-FX,
or 100 BASE-TX. The physical layer transceiver is configured for
converting the MII protocol signals output by the MAC into analog network
signals, such as Multiple Layer Transition-3 (MLT-3) signals for 100 Mb/s
Ethernet networks, or Manchester-encoded signals for 10Mb/s Ethernet
networks.
Happy programming!
|
| Author: Shanthi M 06 Sep 2008 | Member Level: Gold | Rating:  Points: 4 |
Transceiver in Ethernet offers the lowest power, smallest footprint, proven interoperability and advanced features, making it easier and less expensive to build Fast Ethernet network interface cards (NIC), LAN on motherboards, switches, routers and hubs.
|