3com 2900 User Manual

Page of 62
 
1-1 
1  
Product Overview 
Introduction 
The 3Com Baseline Switch 2900 Family are Layer 2 Gigabit Ethernet switches developed by 3Com. 
They are intelligent manageable switches designed for network environments where high performance, 
high-density port distribution, and easy installation are required.  
With 10/100/1000 Mbps Ethernet interfaces, the 3Com Baseline Switch 2900 Family are mainly 
deployed at the access layer in enterprise networks requiring Gigabit to the Desktop (GTTD) application 
and at the distribution layer in metropolitan-area networks (MANs). In the latter deployment, the 3Com 
Baseline Switch 2900 Family provide GE electrical interfaces for user access or low-end switch 
convergence in the downlink direction. Whereas, in the uplink direction, they are aggregated to 
large-capacity Layer 3 switches or switches at the exchange office through their GE interfaces.  
 shows the models and system specifications of the 3Com Baseline Switch 2900 Family.  
Table 1-1 
The 3Com Baseline Switch 2900 Family system specifications 
Description 
Item 
3Com 
Baseline 
Switch 
2920-SFP 
Plus 
3Com 
Baseline 
Switch 
2928-SFP 
Plus 
3Com 
Baseline 
Switch 
2952-SFP 
Plus 
3Com 
Baseline 
Switch 
2928-PWR 
Plus 
3Com 
Baseline 
Switch 
2928-HPWR 
Plus 
Physical 
dimension
s (H × W × 
D) 
43.6 × 440 × 
160 mm (1.72 
× 17.32 × 6.30 
in.) 
43.6 × 440 × 
160 mm (1.72 
× 17.32 × 6.30 
in.) 
43.6 × 440 × 
260 mm (1.72 
× 17.32 × 
10.24 in.)  
43.6 × 440 × 
420 mm (1.72 
× 17.32 × 
16.54 in.)  
43.6 × 440 × 
420 mm (1.72 
× 17.32 × 
16.54 in.)  
Weight 
ñ 3 kg (6.61 lb)  ñ 3 kg (6.61 lb)
ñ 5 kg (11.02 
lb) 
ñ  7 kg (15.43 
lb) 
ñ 7 kg (15.43 
lb) 
Console 
port 
1 1 1 1 1 
Service 
ports 
16 × 
10/100/1000B
ase-T 
autosensing 
Ethernet ports 
+ 4 GE SFP 
interfaces  
24 × 
10/100/1000B
ase-T 
autosensing 
Ethernet ports 
+ 4 GE SFP 
interfaces  
48 × 
10/100/1000B
ase-T 
autosensing 
Ethernet ports 
+ 4 GE SFP 
interfaces  
24 × 
10/100/1000Ba
se-T 
autosensing 
Ethernet ports 
+ 4 GE SFP 
interfaces  
24 × 
10/100/1000B
ase-T 
autosensing 
Ethernet ports 
+ 4 GE SFP 
interfaces