Connecting a Redundant Power Supply

37

Uninterruptable Power — the system allows easy connection and maintenance of batteries to the RPS shelf to further increase the availability of the system.

Additional Power to PoE Ports — the PoE switch’s internal AC Power Supply provides enough power for most network applications. You can use the RPS to supplement power (up to a maximum of 15.4W), including full backups of all PoE devices on the network.

Table 13 outlines the behavior of the switch when changes occur to the power system, such as removing the AC mains cable when the RPS is attached. The responses to the different power inputs are controlled by the switch’s internal power supply and not by the RPS.

Table 13 Switch Power Inputs

Power Input before

Power Input after

Correct Response

User Intervention

User Intervention

 

 

 

AC mains and RPS

RPS only

The unit remains powered by the RPS.

AC mains and RPS

AC mains only

The unit is powered by the AC mains.

 

 

PoE is dropped on all ports, however

 

 

the unit does not reset. PoE restarts

 

 

and is powered by the remaining

 

 

power from the AC mains. PoE ports

 

 

will be dropped depending on their

 

 

preset priority level.

 

 

The total power available to the

 

 

switch may be less than when

 

 

powered from the RPS. Some PoE

 

 

ports may be dropped because they

 

 

are unable to obtain the power they

 

 

require.

RPS only

AC mains and RPS

The unit remains powered by the RPS.

AC mains

AC mains and RPS

The unit is powered by the RPS. Full

 

 

PoE power can be enabled on all

 

 

ports.

 

 

 

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3Com 5500-EI, 5500G-EI manual Switch Power Inputs

5500G-EI, 5500-EI specifications

The 3Com 5500-EI and 5500G-EI series are advanced Ethernet switches designed for enterprise networks, catering to the growing demand for high-performance, secure, and scalable networking solutions. These switches are particularly suited for large organizations that require robust management capabilities and high-density connectivity.

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The Series offers advanced Layer 2 and Layer 3 switching capabilities. Layer 2 features include VLAN tagging, trunking, and Spanning Tree Protocol (STP) to ensure efficient traffic management and network segmentation. On the Layer 3 front, the switches support static routing, RIP, and OSPF, enabling dynamic routing protocols for better traffic flow and load balancing. These features together enhance the performance and reliability of enterprise applications.

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