Connecting a Redundant Power Supply

39

3Com’s RPS solution uses -48V DC power distribution. The RPS system provides bulk -48V DC power that is separately distributed to a number of network switches.

Each RPS consists of a shelf that can house from one to six rectifiers, a

Distribution Module, and a Management Module.

Connecting the When connecting the RPS to the switch, the circuit breaker and 2-core Switch to the cables need to be matched to the switch’s power rating. Table 15 shows

Redundant Power the recommended circuit breaker and cable rating for the Switch 5500. System The recommended cable length should not exceed three metres (9.84

feet).

Table 15 Switch 5500 Circuit Breaker and Cable Ratings

 

Circuit Breaker

Minimum 2-Core Cable Diameter

 

 

 

Non PoE

6A C type

18 AWG (solid or stranded cable)

PoE

25A C type

12 AWG (solid or stranded cable)

 

 

 

WARNING: Make sure to follow the RPS Manufacturers recommendations when connecting the cable to the RPS.

WARNING: Ensure that the circuit breaker in the RPS is in the open (off) position when connecting the cable to the RPS and the cable and connector to the switch.

WARNING: You must ensure that the positive terminal on the switch is connected to the positive (common) terminal of the RPS and that the negative terminal on the switch is connected to the negative (circuit breaker) terminal of the RPS.

Figure 17 shows how to connect the power supply to the RPS socket in the back of the switch. Use the cable tie supplied with your switch to support the cable in the back of the RPS connector as shown in Figure 17.

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3Com 5500-EI, 5500G-EI manual Feet, Switch 5500 Circuit Breaker and Cable Ratings

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.

One of the key features of the 5500-EI and 5500G-EI models is their modular architecture, which allows businesses to tailor the switch configuration to their specific needs. With options for various interface modules, including Gigabit Ethernet and PoE (Power over Ethernet), these switches can support diverse networking requirements and facilitate the gradual expansion of the network infrastructure.

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.

Security is another vital aspect of the 3Com 5500-EI and 5500G-EI series. The switches come equipped with robust security features to protect sensitive data and maintain compliance. These include MAC address filtering, access control lists (ACLs), and support for 802.1X authentication. Additionally, the devices support secure management protocols like SNMP v3, which enhances the security of management communications.

The 5500G-EI model stands out with its high-density port offerings, supporting up to 48 ports in a single switch, with an option for stacking to create a unified management platform across multiple switches. This flexibility allows organizations to leverage their existing infrastructure while scaling seamlessly in response to growing demands.

Another notable characteristic is the built-in IPv6 support, which positions the 3Com 5500-EI and 5500G-EI models favorably for future-proofing enterprise networks as the transition to IPv6 continues. This feature ensures that organizations can maintain connectivity as devices increasingly adopt the newer protocol.

In conclusion, the 3Com 5500-EI and 5500G-EI series offer a comprehensive suite of features and technologies designed for high-performance enterprise networking. With modularity, robust Layer 2 and Layer 3 capabilities, enhanced security measures, and a focus on scalability, these switches provide a solid foundation for modern corporate networks, accommodating future growth and technological advancements.