Technical Specifications - Dell PowerConnect 3048 User Manual

Check the following:
The cable to connect the switch. Ensure that you are using an RJ-45 (network) cable and not an RJ-11 (telephone) cable.
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Ensure that the power cord is firmly connected to the relevant switch unit and to the supply outlet. If the connection is secure and there is still no
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power, you may have a faulty power cord.
Verify that there is sufficient space for adequate airflow on both sides of the switch.
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NOTE: Operating temperature for the switch must not exceed 40ºC.
The switch should not be placed in the direct sunlight or near warm air exhausts or heaters.
On powering-up, the self-test LED lights orange.
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The relevant switch unit has failed its power on self-test because of an internal problem. See
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Ports
The following section discusses troubleshooting associated with ports:
Port does not work.
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Check the following:
The cable connections are secure and the cables are connected to the correct ports at both ends of the link.
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The port status is configured at "Enable" and the autonegotiation feature is enabled at the switch. See
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Interfaces
The following section discusses troubleshooting related to the switch interfaces:
The terminal cannot access the switch.
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Check the following:
Your terminal is correctly configured to operate as a VT100 terminal.
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You are using a proper null modem cable.
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The settings on your terminal are correct. See "Installation" for more information.
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The Web browser cannot access the switch
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Check the following:
The IP information for the switch is correctly configured.
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The switch is powered-up.
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Technical Specifications

Standards
Ethernet types supported
Other standards supported
Interfaces
10/100BASE-T ports
10/100/1000BASE-T ports
SFP GBIC slots
Gigabit stacking ports
RS-232 connector
Indicators
Power LED
Diagnostic LED
Per-Port Mode LEDs:
Per-Port LED
Power
Input
Physical
Dimensions
IEEE 802.3 Type 10Base-T, IEEE 802.3u Type 100
Base-TX, IEEE 802.3z, IEEE 802.3ab
IEEE 802.3x, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p,
IEEE 802.3ad
48
2
2
2
1
1
1
3
1
100–240 VAC, 50-60 Hz
440 mm x 260 mm x 45 mm
"Technical Assistance" for more information.
"Port Manager" for more information.