Boca NET-8, Installation Manual

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BOCA NET BOCA NET BOCA NET BOCA NET BOCA NET-8 Ethernet Kit -8 Ethernet Kit -8 Ethernet Kit -8 Ethernet Kit -8 Ethernet Kit
Functional Descr Functional Descr
Functional Descr Functional Descr
Functional Description f iption f
iption f iption f
iption for the BOC or the BOC
or the BOC or the BOC
or the BOCA NET A NET
A NET A NET
A NET-8 -8
-8 -8
-8
The BOCA NET-8 is an implementation of an IEEE 802.3/
Ethernet repeater or hub. It provides eight 10Base-T ports in a
compact package. The BOCA NET-8 complies with the full set
of repeater basic functions as defined in section 9 of ISO 8802.3
(ANSI/IEEE 802.3c). These functions are defined below:
Repea Repea
Repea Repea Repeater Function
ter Function
ter Function ter Function ter Function
If any single network port senses the start of a valid packet on
its receive lines, then the BOCA NET-8 will re-transmit the
received data to all other enabled network ports.
Signal Regenera Signal Regenera
Signal Regenera Signal Regenera
Signal Regeneration tion
tion tion
tion
When re-transmitting a packet, the BOCA NET-8 ensures that
the outgoing packet complies with the 802.3 specification in
terms of preamble structure, voltage amplitude, and timing
characteristics.
J JJ
J Ja
a
a a abber Loc
bber Loc
bber Loc bber Loc bber Lockup Pr
kup Pr
kup Pr kup Pr kup Protection
otection
otection otection otection
The BOCA NET-8 implements a built-in jabber protection
scheme to ensure that the network is not disabled due to the
transmission of excessively long data packets.
Collision Handling Collision Handling
Collision Handling Collision Handling Collision Handling
The BOCA NET-8 will detect and respond to collision
conditions as specified in 802.3. It will also protect the network
from an excessive duration of, or frequent collisions by
“partitioning” the offending port from the rest of the network.
Once a port is partitioned, the data received from that port will
not be repeated. However, any other data on the network will
be re-transmitted on that port.
9370.p65 1/28/99, 2:57 PM 10