Getting Started Guide
Page 20
...be connected easily. ■ Water or moisture cannot enter the case of the Switch. ■ Air flow is not restricted around the Switch or through the vents in the side of the Switch. 3Com recommends that you provide a minimum of 25 mm (1 in a standard 19-... ■ Power Cord ■ 2 x securing brackets ■ 4 x screws (Switch 3812 and Switch 3824) ■ 8 x screws (Switch 3848) ■ 4 x rubber feet ■ RJ45 to DB9 converter cable (Switch 3848 only) Choosing a Suitable Site The Switch is suited for use in an internal wiring closet, a network room, or telecommunications room...
...be connected easily. ■ Water or moisture cannot enter the case of the Switch. ■ Air flow is not restricted around the Switch or through the vents in the side of the Switch. 3Com recommends that you provide a minimum of 25 mm (1 in a standard 19-... ■ Power Cord ■ 2 x securing brackets ■ 4 x screws (Switch 3812 and Switch 3824) ■ 8 x screws (Switch 3848) ■ 4 x rubber feet ■ RJ45 to DB9 converter cable (Switch 3848 only) Choosing a Suitable Site The Switch is suited for use in an internal wiring closet, a network room, or telecommunications room...
Getting Started Guide
Page 21
... pads from sources of conductive (electrical) dust, for example laser printers. ■ The unit is installed in a clean, air conditioned environment. ■ The AC supply used by the Switch is separate to that used by units that it will fit in Figure 6. 3 Insert the screws and tighten with a suitable... ensure that generate high levels of AC noise, for example air conditioning units. ■ No more than room ambient temperature. ■ The air is 1U high and will not obstruct the air flow through the side panels of the Switch if they have been fitted. Remove all cables from dust ...
... pads from sources of conductive (electrical) dust, for example laser printers. ■ The unit is installed in a clean, air conditioned environment. ■ The AC supply used by the Switch is separate to that used by units that it will fit in Figure 6. 3 Insert the screws and tighten with a suitable... ensure that generate high levels of AC noise, for example air conditioning units. ■ No more than room ambient temperature. ■ The air is 1U high and will not obstruct the air flow through the side panels of the Switch if they have been fitted. Remove all cables from dust ...
Getting Started Guide
Page 46
...there is flashing Green/Yellow (fast). If a fan has stopped spinning, power off the unit and check the air vents for about ten seconds after which it will light red (Switch 3848 only). ■ The internal PSU has failed and power is flashing green/yellow The port has failed and...LED is being supplied by an external Redundant Power Supply (RPS). On Powering up , the Self Test LED lights red (Switch 3812 and Switch 3824) or Power/Self Test LED remains yellow (Switch 3848) This indicates one or more ports are disabled. Check the power cord by: ■ Testing it starts flashing ...
...there is flashing Green/Yellow (fast). If a fan has stopped spinning, power off the unit and check the air vents for about ten seconds after which it will light red (Switch 3848 only). ■ The internal PSU has failed and power is flashing green/yellow The port has failed and...LED is being supplied by an external Redundant Power Supply (RPS). On Powering up , the Self Test LED lights red (Switch 3812 and Switch 3824) or Power/Self Test LED remains yellow (Switch 3848) This indicates one or more ports are disabled. Check the power cord by: ■ Testing it starts flashing ...
Getting Started Guide
Page 48
...the unit. An SNMP thermal shutdown trap and email is received 1 Power off the unit. 2 Check that the air vents are not obstructed. 3 Power cycle the unit. If a further thermal shutdown occurs, and all environmental conditions ...48 CHAPTER 4: PROBLEM SOLVING If a fan failure warning message is generated: 1 Power off the unit. 2 Check that the air vents are not obstructed. 3 Check that the ambient temperatures and environmental conditions meet those specified in Appendix C. 4 Power cycle ... If no, return the unit: If yes, check that: ■ The air vents are satisfactory, return the unit to...
...the unit. An SNMP thermal shutdown trap and email is received 1 Power off the unit. 2 Check that the air vents are not obstructed. 3 Power cycle the unit. If a further thermal shutdown occurs, and all environmental conditions ...48 CHAPTER 4: PROBLEM SOLVING If a fan failure warning message is generated: 1 Power off the unit. 2 Check that the air vents are not obstructed. 3 Check that the ambient temperatures and environmental conditions meet those specified in Appendix C. 4 Power cycle ... If no, return the unit: If yes, check that: ■ The air vents are satisfactory, return the unit to...