Transition Networks LAN MASTER 33022.B - Manual (Page 11)

LANMaster™ T8 8-Port Ethernet™ Repeater Hub
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.
8 11
wall plate
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 X – 1 2 3 4 5 6 7 8
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.
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.
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.
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.