3Com SuperStack 3 3C17204, Руководство по началу работы

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16 C
HAPTER
1: I
NTRODUCING THE
S
UPER
S
TACK
3 S
WITCH
4400
Figure 4 Switch 4400 (48-port) — front view
WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot
be used as standard traditional telephone sockets, or to connect the unit to a
traditional PBX or public telephone network. Only connect RJ-45 data
connectors, network telephony systems, or network telephones to these
sockets.
Either shielded or unshielded data cables with shielded or unshielded
jacks can be connected to these data sockets.
10BASE-T/
100BASE-TX Ports
The Switch 4400, 4400 SE and 4400 PWR have 24 or 48
auto-negotiating 10BASE-T/100BASE-TX ports configured as Auto MDIX
(cross-over). These ports automatically provide the appropriate
connection. Alternatively, you can manually set these ports to 10BASE-T
half duplex, 10BASE-T full duplex, 100BASE-TX half duplex or
100BASE-TX full duplex. The maximum segment length is 100 m (328 ft)
over Category 5 twisted pair cable.
The 4400 PWR will supply up to 15.4W of power through any of the 24
front panel ports in conformance to the 802.3af specification. The Switch
4400 PWR incorporates a LED Mode Button on the front panel, which
when pressed changes the mode of the front panel port LEDs
functionality between Switch and Power mode.
100BASE-FX Ports The Switch 4400 FX has 24 100BASE-FX MT-RJ ports. These are
100 Mbps fiber-optic ports that can use standard multi-mode fiber-optic
cable of up to 2 kilometers (1.2 miles). They use the standard MT-RJ
DUA1720-3AAA09.book Page 16 Wednesday, July 6, 2005 4:33 PM