3com 4070 Guida All'Installazione Rapida
3Com Switch 40x0 Family — Front View Detail
15
Figure 3 3Com Switch 4070 — front view
A fiber port can only be connected to an identical type of port. For
example, a 1000BASE-SX port connected to another 1000BASE-SX port
will work, whereas a 1000BASE-SX port connected to a 1000BASE-LX
port will not work.
example, a 1000BASE-SX port connected to another 1000BASE-SX port
will work, whereas a 1000BASE-SX port connected to a 1000BASE-LX
port will not work.
1000BASE-SX Ports
The auto-negotiating 1000BASE-SX ports have MT-RJ connectors.
The default state for these ports is auto-negotiation enabled, where the
speed, duplex and flow control modes are negotiated. As the speed and
duplex modes are fixed by the media type, only the flow control is
negotiated with the link partner. Alternatively, auto-negotiation can be
disabled and the flow control setting can be manually configured.
speed, duplex and flow control modes are negotiated. As the speed and
duplex modes are fixed by the media type, only the flow control is
negotiated with the link partner. Alternatively, auto-negotiation can be
disabled and the flow control setting can be manually configured.
GBIC Ports
The 6 GBIC ports support fiber Gigabit Ethernet short-wave (SX),
long-wave (LX) and long-haul (LH70) GBIC transceivers in any
combination. This offers you the flexibility of using GBIC transceivers to
provide connectivity between the Switch and remote 1000 Mbps
workgroups or to create a high capacity aggregated link backbone
connection.
long-wave (LX) and long-haul (LH70) GBIC transceivers in any
combination. This offers you the flexibility of using GBIC transceivers to
provide connectivity between the Switch and remote 1000 Mbps
workgroups or to create a high capacity aggregated link backbone
connection.
The default state for these ports is auto-negotiation enabled, where the
speed, duplex and flow control modes are negotiated. As the speed and
duplex modes are fixed by the media type, only the flow control is
negotiated with the link partner. Alternatively, auto-negotiation can be
disabled and the flow control setting can be manually configured.
speed, duplex and flow control modes are negotiated. As the speed and
duplex modes are fixed by the media type, only the flow control is
negotiated with the link partner. Alternatively, auto-negotiation can be
disabled and the flow control setting can be manually configured.
13
1
3Com Switch 4070
Unit Status
Layer 3
2
PSU Status
1
Fan Fault
R
F
1
2
Unit
3
4
S
P
Module
Temperature
Unit Status LED
and Layer 3 LED
PSU LEDs
Fan LEDs
Unit LEDs
Module
Status LEDs
Temperature
LED
On = enabled, link OK Flashing = disabled
P = Packet
S = Status
Console Port
Front Fan Tray (behind door)
SFP Ports
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
P
S
P
S
14
2
P
S
P
S
15
3
P
S
P
S
16
4
P
S
P
S
17
5
P
S
P
S
18
6
P
S
P
S
19
7
P
S
P
S
20
8
P
S
P
S
21
9
P
S
P
S
22
10
P
S
P
S
23
11
P
S
P
S
24
12
P
S
P
S
Console
(max) 19200,8,1,N
3C 17707
DUA1770-9AAA04.book Page 15 Monday, April 14, 2003 11:33 AM