3com 4050 Manuale Utente

Pagina di 86
3Com Switch 4050 and 4060 — Front View Detail
15
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.
10BASE-T/
100BASE-TX/
1000BASE-T Ports
The 10BASE-T/100BASE-TX/1000BASE-T ports have RJ-45 connectors and 
are configured as Auto MDIX (cross-over).
The default state for these ports is auto-negotiation enabled, where the 
speed, duplex and flow control modes of a link are automatically 
detected to provide the highest available bandwidth with the link partner. 
Alternatively, auto-negotiation can be disabled. These ports can be 
manually configured to 10 Mbps half duplex, 100 Mbps half duplex, 
10 Mbps full duplex or 100 Mbps full duplex. It is not possible to 
manually configure a 1000 Mbps link as auto-negotiation is mandatory in 
the 1000 Mbps standard. If auto-negotiation is disabled, Auto MDIX 
cannot function and the ports are fixed as MDIX (cross-over) mode.
If auto-negotiation is disabled on a 1000 Mbps port, the speed will drop 
to the highest available speed. By default this is 100 Mbps. 
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. 
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.
Console Port
The console port allows you to connect a terminal and perform remote or 
local out-of-band management. The console port uses a standard null 
modem cable and is set to autobaud (up to a maximum of 19,200 baud), 
8 data bits, no parity and 1 stop bit.