Microsens MS453490M Installation - Manual (Page 23)

C HAPTER 1
| Introduction
Description of Hardware
– 23 –
D
ESCRIPTION OF
H
ARDWARE
RJ-45 P
ORTS
The switch contains 8 100BASE-TX RJ-45 ports and 2 shared
1000BASE-T RJ-45/SFP ports. All RJ-45 ports support automatic MDI/MDI-X
operation, so 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 54 .)
Each of these ports support auto-negotiation, so the optimum transmission
mode (half or full duplex), and data rate (10, or 100 Mbps - ports 1~8, and 10,
100, or 1000 - ports 9~10) can be selected automatically
2 .
Each port also supports IEEE 802.3x auto-negotiation of flow control, so the
switch can automatically prevent port buffers from becoming saturated.
SFP T RANSCEIVER S LOTS
The Small Form Factor Pluggable (SFP) transceiver slots are shared with the two
1000BASE-T RJ-45 ports (ports 9~10). In the default configuration, if an SFP
transceiver (purchased separately) is installed in a slot and has a valid link on
the port, the associated RJ-45 port is disabled. 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 switch. For an updated list of vendors supplying these transceivers, contact
your local dealer. For information on the recommended standards for fiber optic
cabling, see
“1000 Mbps Gigabit Ethernet Collision Domain” on page 45 .
2. The 1000BASE-T standard does not support forced mode. Auto-negotiation must
always be used to establish a connection over any 1000BASE-T port or trunk.
Table 1: Supported SFP Transceivers
Media Standard Cable Diameter
(microns)
Wavelength (nm) Maximum Distance *
1000BASE-SX 50/125 850 550 m
62.5/125 850 400 m