893-743-A
A-1
Appendix A Technical Specifications
This appendix provides technical specifications for the Model 281xSA Ethernet
Hub.
Network Protocol
10 Mb/s Manchester encoded (IEEE 802.3 CSMA/CD)
Standards Support
IEEE 802.3i Type 10BASE-T
IEEE 802.3 10BASE-FL draft standard
Electrical Specifications
Input power:
40 W
Thermal rating:
136 BTU/hr maximum
AC line frequency:
50–60 Hz
Input voltage:
100–240 VAC
Volt amperes rating:
1.0 A at 100 V AC
0.5 A at 240 V AC
Fuses:
Internal
Fuse rating:
2 A at 240 V AC
Optical Specifications (Model 2814SA Ethernet Hub)
Optical transmit range:
-12 dBm to -18 dBm
Optical receive average power range:
-12 dBm to -32.3 dBm
Physical Specifications
Weight:
8.2 lb (3.7 kg)
Dimensions: (W) 17.3 by (D) 7.2 by (H) 2.5 in
(W) 43.9 by (D) 18.2 by (H) 6.3 cm
Rack space:
1.5 rack-mount spaces
Environmental Specifications
Operating temperature: 5
°
to 40
°
C
Storage temperature:
-25
°
to +70
°
C
Operating humidity:
85% maximum relative humidity, noncondensing
Storage humidity:
95% maximum relative humidity, noncondensing
Operating altitude:
10,000 ft (3,000 m) maximum