3Com Baseline Switch 2920-SFP Plus - Cooling System; Ports; Console Port; 10;100;1000 Base-T Ethernet Port

1-8
Only the RPS recommended by 3Com can be used for the 3Com Baseline Switch 2928-HPWR Plus.
The –48 VDC power supply in the equipment room cannot be used directly. Otherwise, the device may
be damaged.
Cooling System
The 3Com Baseline Switch 2928-HPWR Plus is equipped with six fans for heat dissipation.
Ports
Console Port
Each 3Com Baseline Switch 2900 Family provides one console port on the front panel. Table 1-2
describes the console port specifications.
Table 1-2 Console port specifications
Item Specification
Connector type RJ-45
Compliant standard EIA/TIA-232
Transmission baud
rate
9600 bps to 115200 bps (defaulting to 38400 bps)
Service
z It can be connected to an ASCII terminal.
z It can be connected to a serial port of a local or remote (through a pair of
modems) PC running terminal emulation program.
10/100/1000Base-T Ethernet Port
Each 3Com Baseline Switch 2900 Family provides 10/100/1000Base-T Ethernet ports on its front panel.
Quantity of Ethernet ports varies with the device model, see
Table 1-1 for details.
Table 1-3 describes the specifications of the 10/100/1000Base-T Ethernet ports.
Table 1-3 3Com Baseline Switch 2900 Family 10/100/1000Base-T Ethernet port specifications
Item Specification
Connector type RJ-45
Interface speed and operating mode
z 10 Mbps, full duplex
z 100 Mbps, full duplex
z 1000 Mbps, full duplex
z MDI/MDI-X, auto-sensing
Max transmission distance 100 m (328.1 ft.)
Transmission medium Category-5 unshielded twisted pair cable
Standard IEEE 802.3i, IEEE 802.3u, IEEE 802.3ab