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Black Box Modular Switches Installation and User Guide (8/99)
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Example 3 : 16-port LE1416A
In another situation similar to Example 2 above, a larger central Switch is needed to
provide for a 6-
segment 100Mb fiber Fast Ethernet backbone, and switched copper support for
4 high speed local servers. In addition, the router and two dual-
speed hubs need switched copper
ports. The total is 14 ports, 6 fiber and 8 copper.
The mixed-media flexibility of the Black-Box 4-
Port Switches provides the user with
more than one configuration in this case. The two ports not immediately used may be either fiber
or copper. If the probable growth of the central Switch is towards more fiber backbone
segments, then two 4-
port fiber 4PMs are selected to provide 6 required fiber ports and two for
spares and/or future backbone expansion. The 8 switched copper ports are handled with two RJ
45 4-Port Modules configured into the LE1416A. Should the number of servers expand, more
than one server can be serviced by a switched LE1416A port by using a small 4-
port 100Mbps
hub.
If the probable growth of the central Switch is towards more local high speed servers
and users, then one 4-
port fiber 4PM is selected to provide 4 of the required fiber ports, and two
“combo 3 RJ-
45 + 1 fiber” 4PMs are configured for the other 2 fiber ports plus 6 of the switched
copper ports. Finally, an RJ-45 QPM is configured to provide for the rema
ining 2 copper ports
plus two for spares and/or future expansion. Should the need arise to add a built-in-fiber
backbone port in the future, the RJ-
45 4PM could be removed and another “3+1 combo” 4PM
installed in the field. Alternatively, a 100MB Media Converter (such as the LH1500A-ST-R2)
may be used on a copper port, with internal jumpers (See Section 3.4) set to support fixed
100MB FDX on the RJ-45 port.
Fig 2.4c: LE1416A provides a 100Mb mixed-media backbone Switch.
10Mb Workgroup
100Mb fiber segment
100Mb Servers
and Workstations
100Mb Workgroup
Internet
Router
Magnum QS5116
Fiber Switch
GARRETT
Magnum QS5116
PWR
ACT
100/10
2
3
1
FDX/HDX
4
LK
ACT
ACT
Modular Switch
100/10
2
3
1
FDX/HDX
4
LK
Black-Box le1416a
100/10 FDX/HDX
ACTLK
10/100
100/10 FDX/HDX
ACTLK
10/100
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16
X
UPLINK
LK/RX
PORT
100
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
PWRBR
COL 10
COL 100
Magnum DS8016 Stackable Hub
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16
X
UPLINK
LK/RX
PORT
100
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
PWRBR
COL 10
COL 100
Magnum DS8016 Stackable Hub
Magnum 800E
Workgroup Hub
100 Mb/s
GARRETT
LINKRX LINKRXPWR COL
1 2 3
4
5 6 7
8