Specifications

RADring
Installation & Operation Manual Functional Description
3/11/98 12:33 Ethernet Modules Functional Description 2-43
2.11 Ethernet Modules Functional Description
Multiport
Repeater Module
EP-8T
The EP-8T is an eight 10BaseT ports repeater. It can only be used with a
RADring hub which contains an Ethernet bus. The repeater is either
connected to the hub’s Ethernet bus as a part of an Ethernet segment, or
works as an independent repeater in stand alone mode.
The module can be connected to an additional RADringII Ethernet module
via an Inter Repeater Link (IRL). Such a connection requires one crossover
cable.
The module performs an automatic partitioning and reconnection when a
port violates transmission protocols. LAN operation is not interrupted while
the module checks the affected port. Jabber lockup protection is used to
ensure that the LAN operation is not affected by the transmission of
excessively long packets. It also corrects reversed packet waveform polarity.
The EP-8T occupies two slots and has eight screened RJ-45 connectors. It is
connected via UTP and/or screened (???) UTP cables. Up to 10 modules can
be installed in a single hub allowing connection of up to 80 10BaseT links.
EP-4T/AUI
The EP-4T/AUI is a repeater that contains four 10BaseT ports and one AUI
port. It can only be connected to RADring hubs with an Ethernet bus. The
module is either connected to the hub’s Ethernet bus as part of an Ethernet
segment, or works as an independent repeater in stand alone mode.
The module can be connected to an additional RADringII Ethernet module
through a UTP port in an Inter Repeater Link (IRL). Such a connection
requires one crossover cable.
The AUI port (DTE side) can be connected to any standard AUI transceiver
interface, thus enabling the RADringII hub to be connected to coaxial
segments, to fiber optic cables, or to 10BaseT segments via the transceiver.
The module performs an automatic partitioning and reconnection when a
port violates transmission protocols. LAN operation is not interrupted while
the module checks the affected port. Jabber lockup protection is used to
ensure that the LAN operation is not affected by the transmission of
excessively long packets. It also corrects reversed packet waveform polarity.
The EP-4T/AUI occupies two slots and has four screened RJ-45 connectors
and one AUI DB-15 connector. The UTP ports are connected by UTP and/or
screened UTP cables and the AUI port is connected to an AUI cable or
directly to a transceiver. Up to 10 modules can be installed in a single hub.