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CHAPTER 3
INSTALLATION
Getting Ready to Install the EH-2400
Power Requirement
EH-2400 is designed with full range power supply. Make sure you power is in the range 90to
260VAC at 50 to 60 Hz. This device require 15 Watts for operation and 10 Watts for stand-
by.
Prepare to Install EH-2400
EH-2400 support 24-port 10Base-T, one port BNC, and one port AUI connection. Extra
UpLink port for hub cascade. Each port is printed with its port number on the location.
STP port and STP/UTP Cable
Connect port 1 to port 24 with non cross-over cable to any LAN cards. If connect to a hub through port 1
to port 24, a cross-over cable is required. Users can use a non cross-over cable to cascade to another hub
through “UpLink port”. Users should use
ONLY ONE
of these two port at the same time. Plug two
twisted-pair cable to these two ports will cause this hub malfunction.
The STP/UTP cable should be 22, 24, or 26 AWG with a minimum of one twist per foot. 24 AWG is
recommended. The cable should have a nominal impedance of 100 ohms at 10 MHz, a maximum segment
loss of 11.5 dB between 5 and 10 MHz, and a maximum end-to-end propagation delay of 1 microsecond.
You can use a STP/UTP cable that complies with AT&T's Premises Distribution System (PDS) wiring
standard.
BNC port and Coaxial Thin Cable
EH-2400’s thin coaxial port can be connected to either a computer or another hub. In order to user the
thin coaxial port, you will need one thin coaxial cable, two 50-ohm terminators and T-connectors.
Thin coaxial cable is a 50-ohm coaxial cable with a copper or tinned center conductor, solid inner
dielectric (insulating material), and braided wire (not foil) shielding. It can be an RG-58, RG-58/A, RG-
58/U, or RG-58A/U cable.
AUI port
The AUI port of EH-2400, beside the feature of BNC port, can be connected to external transceivers, like
AUI to BNC, AUI to TP, or AUI to fiber-optic transceiver, and then connected to a computer, a hub or
another repeater.
