Magnum DS80F & DS80C Dual-speed Stackable Hubs Installation and User Guide (12/01)
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2.2
Product Description - General
The DS80F Dual-Speed Personal Hubs with a Fiber Port, and the DS80C model with
all copper ports, offer the flexibility of 100Mbps switched fiber link upstream with the
convenience of dual-speed 10/100 copper ports for workplace LAN connections.
Magnum D80F “Fiber” models have been designed with one full-duplex 100Mbps
switched fiber port, one “N-way” switched RJ-45 and six half-duplex 10/100 auto-negotiating
RJ-45 ports. The DS80C “Copper” model has been designed with all eight RJ45 ports, two
switched ports with “N-way” capability and six half duplex 10/100 auto-negotiating ports. For
half- or full duplex selection on the two switched ports, see sections 4.3 and 4.4.
Ports #3 to 8 can independently identify (via IEEE 802.3u auto-sensing) and accept
either 100Mbps or 10Mbps Ethernet signals, adapting to match the highest speed of the
connected device. While the switched fiber port is typically for a backbone connection (note –
no media converter is required), the switched RJ-45 port can be used at 100Mb. FDX for
F
igure 2.2.1: DS80F & DS80C is functionally both a 10Mbps and a 100Mbps hub in one
high-performance workplace servers or to cascade to another DS80-series for expansion. There
are separate internal traffic domains in Magnum DS80F & DS80C hubs, one for the 100Mbps
traffic and one for the 10Mbps traffic.
DS80F & DS80C ports #3 to 8 can connect into either the 100 or the 10Mbps traffic
domain, and can also change from one traffic domain to the other at any time without affecting
the speed of other ports. The automatic per-port speed-sensing is always ready (it takes place at
LINK enable, see Section 4.2 for details), allowing the connected devices to change speed at any
time without impairing the operation of the other ports and connected devices.
Tx Rx
UPLINK
F
H
= X
2SW
UPLINK
3 4 5 6 7 8
1SW
Magnum DS80 Dual Speed
Personal Hub
PORTS 1SW 2SW 3 4 5 6 7 8
Speed
Link/Act
F/H
Power
Error
GARRETT
12V, 1.5Amps
Magnum 500-series
DS80F or DS80C
GARR ETT
PWR
1 2 3 4
5 6 7 8
Magnum
8000E
9 10 11 12
Stacka ble
Hub
GARR ETT
PWR
1 2 3 4
5 6 7 8
9 1 0 11 12
10Mbps Hub
100Mbps Hub
