3com DUA1770-0AAA04 用户手册

The technical specifications for the Switches in the Switch 4900 Series are 
the same unless otherwise stated.

Switch 4900: Switch Height: 65.8 mm (2.59 in.) x Width: 440 mm (17.3 in.) x 
Depth: 363.4 mm (14.30 in.) (not including bulge). Weight: 6.3 Kg (13.88 lbs)

Switch 4900 SX: Height: 65.8 mm (2.59 in.) x Width: 440 mm (17.3 in.) x 
Depth: 363.4 mm (14.30 in.) (not including bulge). Weight: 6.0 Kg (13.22 lbs)

Switch 4924: Height: 65.8 mm (2.59 in.) x Width: 440 mm (17.3 in.) x Depth: 
413 mm (16.27 in.) (not including bulge). Weight: 6.4 Kg (14.10 lbs)

Switch 4950: Height: 65.8 mm (2.59 in.) x Width: 440 mm (17.3 in.) x Depth: 
413 mm (16.27 in.) (not including bulge). Weight: 6.91 Kg (15.23 lbs)

Operating Temperature

0 ° to 40 °C (32 ° to 104 °F)

Storage Temperature

–10 ° to +70 °C (14 ° to 158 °F)

Operating Humidity

10–95% relative humidity, non-condensing

Standards

EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32. 
Operational testing: paras 2.1, 2.2, 2.30 and 2.13).

Agency Certifications

UL 1950 / UL60950, EN60950, CSA 22.2 No. 950 / CSA 22.2 No. 60950, 
IEC 60950, IEC 825-1 (4900 SX and 4950 only), EN 60825-1 (4900 SX and 4950 
only)

Emissions

CISPRR 22 Class A, EN55022 Class A, FCC Part 15 Subpart B Class A, 

ICES-003 Class A, VCCI Class A, AS/NZS 3548 Class A, CNS 13438 Class A, 
EN61000-3-2

Immunity

EN 55024

Switch 4900: 308 

watts maximum 

Switch 4900 SX: 

162 watts maximum

254 watts maximum

Switch 4950: 200 

watts maximum