Allied Telesis AT-RH505BE Manuale di installazione rapida - Pagina 6
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Troubleshooting
1.
Verify power for the hub and all attached devices by checking the
PWR LED on the hub to make sure it lights green.
2.
Make sure that all devices are securely attached to the network and
that the adapter card(s) are operating.
3.
Follow the recommended cable distances and repeater limitations.
4.
A specific port may have been partitioned from the network.
Check for a defective network adapter or cable connection and
make sure that all devices are connected to the network by a single
path.
5.
If thin coaxial cable is used, make sure that the cable run is termi-
nated at both ends using a BNC terminator. If no cables or termi-
nators are connected to the BNC port, ignore the status LED for
this port.
Table 3 Technical Specifications
Dimensions
W x D x H
99 mm x 54 mm x 21 mm (AT-RH505BE)
158 mm x 54 mm x 21 mm (AT-RH509BE)
Weight
180 g (AT-RH505BE)
270 g (AT-RH509BE)
Operating temperature
0
0
C to 40
Storage temperature
0
-20
C to 80
Operating altitude
up to 10,000 ft
Humidity limits
5% to 80% (non-condensing)
Power Consumption
4 W (AT-RH505BE)
6 W (AT-RH509BE)
Input Voltage
5.0 VDC
Input Current
1.2 A
Network
IEEE 802.3 10Base-T and 10Base2
Safety
UL1950, CSA22.2 No. 950, TUV (EN60950, EN41003)
EMI Emissions
FCC Class A, VCCI Class A, EN55022 Class A
EN50082-1 (ESD immunity IEC 801-2 1984 Level 2, RF immunity IEC-801-3
1984 Level 2, and EFT/Burst Immunity IEC 801-4 1988 Level 2)
CE Compliant
MTBF
153,000 hrs at 25
102,000 hrs at 25
Physical
Environmental
0
C
0
C
Electrical
Standards
EMI Immunity
Reliability
o
C or above (AT-RH505BE)
o
C or above (AT-RH509BE)
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