Transition Networks 33022.B Installing Twisted-Pair 10BASE-T Cable, 10BASE-2 Requirements

Installing Twisted-Pair 10BASE-T Cable

To connect 10BASE-T Cable to LANMaster T8 RJ-45 connectors:

1.Locate or build 10BASE-T cables that are:

•802.3 compliant (See page 20.)

•with straight through connector/cable configuration (See page 7.)

•with male RJ-45 plug connectors at both ends.

2.Connect male RJ-45 plug connector at one end of 10BASE-T cable to LANMaster T8 RJ-45 jack connector.

3.Connect male RJ-45 plug connector at other end of 10BASE-T cable to DTE terminal RJ-45 jack connector or to RJ-45 jack connector on other hub.

NOTE: The IEEE 802.3 standard states that the shield of a coax trunk cable shall make electrical contact with an earth reference once and only once per segment. Failure to provide an earth ground to a 10BASE- 2 or 10BASE-5 segment may allow ambient RF energy to couple onto the cable shield, resulting in intermittent network failure. More than one ground per segment may allow a potential difference between the two grounds to cause current to flow, damaging components. And, since Ethernet senses collisions on 10BASE-2 and 10BASE-5 cable by monitoring the shield voltage level, more than one ground could cause false collisions that result in repeater ports partitioning and network traffic beyond the partition ceasing.

10BASE-2 Requirements

Thinnet 10BASE-2 cable “daisy-chains” network devices.

NOTE: Hub-to-hub LANMaster T8 connections MUST be from any port 1-8 on one LANMaster T8 hub to the X port on the other LANMaster T8 hub.

wall plate

X – 1 2 3 4 5 6 7 8

With a maximum segment length of 185 meters and a minimum segment length of 0.5 meters, the coaxial cable must have a 50 ohm characteristic impedance. Standard BNC connectors and "T's" provide access to the media, typically connected directly to the back of network interface cards, eliminating the need for an external transceiver.

Only 30 transceivers can be installed onto a 10BASE-2 Ethernet segment, spaced at least 0.5 meters apart. The first and last device in the daisy-chain must be terminated with a 50 ohm terminator, grounded to “earth ground” at one end.

10BASE-5 Requirements

Thicknet 10BASE-5 cable is the original Ethernet.

X – 1 2 3 4 5 6 7 8

X – 1 2 3 4 5 6 7 8 X – 1 2 3 4 5 6 7 8

With a maximum segment length of 500 meters and a minimum segment length of 1.5 meters,the coaxial cable must have a 50 ohm characteristic impedance.

As many as 100 transceiver can be installed onto a 10BASE-5 Ethernet segment, spaced at least 2.5 meters apart. There must be a type N 50 ohm terminator installed at each end of a thick coaxial cable segment.

11 LANMaster™ T8 8-Port Ethernet™ Repeater Hub 8