Visara SCON-20L Reference Manual - Manual (Page 17)

707043-005 2-9
Chapter 2. Installation
10BASE-T Operation
10BASE-T is the Institute of Electrical and Electronics Engineers (IEEE) 802.3 standard
for Ethernet signaling over unshielded twisted-pair wire at 10 Mbps.
10BASE-T Ethernet’s characteristics include:
• A data rate of 10 Mbps.
• A broadcast architecture.
• A specific media-access control (MAC) scheme.
The 10BASE-T name indicates a signaling speed of 10 Mbps and twisted-pair wiring.
Base stands for baseband, which denotes a technique for transmitting signals as direct-
current pulses rather than modulating them onto separate carrier frequencies.
A wiring topology using 10BASE-T specifies a wiring hub, cable arranged in a star
configuration, and unshielded twisted-pair cable. Each node has a separate cable run
that must not exceed 100 meters (328 ft) from the node to the hub.
100BASE-TX Operation
100BASE-TX is the IEEE 802.3u standard for Fast Ethernet signaling over Category 5
UTP or STP wire at 100 Mbps.
Based on an extension to the IEEE 802.3 Ethernet specification, Fast Ethernet’s
characteristics include:
• A data rate of 100 Mbps.
• A broadcast architecture.
• A specific media-access control (MAC) scheme.
A wiring topology using 100BASE-TX specifies a wiring hub, cable arranged in a star
configuration, and Category 5 UTP or STP wiring. Each node has a separate cable run
that must not exceed 100 meters (328 ft) from the node to the hub.
Figure 2-3 shows the RJ-45 connector pin assignments for the 10/100 Mbps
Ethernet NIC.