LG-Ericsson iPECS ES-4526G, Руководство по установке

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C
HAPTER
1
| Introduction
Description of Hardware
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ES-4550G / ES-4526G
D
ESCRIPTION OF
H
ARDWARE
10/100/1000BASE-T P
ORTS
The switches contain 24/48 RJ-45 ports that operate at 10 Mbps or 100 Mbps,
half or full duplex, or at 1000 Mbps, full duplex. Because all ports on these
switches support automatic MDI/MDI-X operation, you can use straight-through
cables for all network connections to PCs or servers, or to other switches or
hubs. (See
"1000BASE-T Pin Assignments" on page 78 .)
Each of these ports support auto-negotiation, so the optimum transmission
mode (half or full duplex), and data rate (10, 100, or 1000 Mbps) can be
selected automatically. If a device connected to one of these ports does not
support auto-negotiation, the communication mode of that port can be
configured manually.
SFP T
RANSCEIVER
S
LOTS
The Small Form Factor Pluggable (SFP) transceiver slots are shared with four of
the RJ-45 ports (ports 21~24 for the ES-4526G and ports 45~48 for the ES-
4550G). In its default configuration, if an SFP transceiver (purchased separately)
is installed in a slot and has a valid link on its port, the associated RJ-45 port is
disabled and cannot be used. The switch can also be configured to force the use
of an RJ-45 port or SFP slot, as required.
The following table shows a list of transceiver types which have been tested with
the switches. For an updated list of vendors supplying these transceivers,
contact your local dealer. For information on the recommended standards for
fiber optic cabling, see
"Fiber Standards" on page 79 .