Can this switch be stacked and how many units?

Yes, it supports stacking up to 8 units via 3Com XRN technology, enabling up to 384 Fast Ethernet ports managed as one entity with 2 Gbps full-duplex bandwidth and wirespeed across the stack.

What Layer 3 features are supported?

Includes OSPF, RIP v1/v2, PIM-Dense Mode multicast routing, plus 16K MAC addresses, 4K dynamic ARP, and 32 IP interfaces. SNMP v1-3 and RMON provide comprehensive management.

What are the power and environmental specs?

Uses external 90-240 VAC 50/60 Hz power supply (1.0A max), operates 0° to 40°C (32-104°F), stores -10° to 70°C, humidity 10-95% non-condensing. Dimensions: 1RU height 43.6mm x 440mm width.

What compliance standards does it meet?

Certified to EN 60068, CISPR 22 Class A, FCC Part 15 Class A, EN 55022/55024, UL/IEC/EN 60950-1, CAN/CSA-C22.2 No. 60950-1-03, VCCI Class A, ensuring electromagnetic compatibility and safety.

What is the reliability rating?

MTBF for similar 26-port model is 47 years (411,000 hours); 26-port PWR is 25 years (221,000 hours). Designed for enterprise reliability with store-and-forward switching and robust components.

3CR17161-91 - 3Com 5500-EI 28-Port 24 x 10/100Base-TX; 4 x SFP (mini-GBIC) Switch

Name: 3CR17161-91 - 3Com 5500-EI 28-Port 24 x 10/100Base-TX; 4 x SFP (mini-GBIC) Switch
Brand: 3Com
SKU: 3CR17161-91

3CR17161-91 - 3Com 5500-EI 28-Port 24 x 10/100Base-TX; 4 x SFP (mini-GBIC) Switch | US IT Hardware

Product overview

The 3Com SuperStack 4 Switch 5500-EI 28-Port (SKU 3CR17161-91) is a stackable managed Layer 3 Ethernet switch designed for enterprise environments. It provides 24 x 10/100Base-TX ports and 4 x SFP ports for flexible connectivity, supporting stacking up to 8 units for a maximum of 384 Fast Ethernet ports. With 12.8 Gbps switching capacity and 9.5 Mpps forwarding rate, it delivers wirespeed performance across all ports in the stack. Advanced Layer 3 features include OSPF, RIP v1/v2, PIM-DM, and SNMP v1/v2/v3 management. Power via external 90-240 VAC supply, dimensions 43.6mm x 440mm (1RU), operating temperature 0-40°C. Compliance with EN 60950-1, FCC Class A ensures reliability. MTBF exceeds 25 years for similar models. Ideal for scalable LANs in offices, schools, and ISPs requiring high-density Fast Ethernet with Gigabit uplinks and robust routing.

24x10/100TX +4 SFP ports, 12.8Gbps capacity
Stack up to 8 units, 384 ports max single IP
OSPF/RIP L3 routing, SNMP v3 management
9.5 Mpps forwarding, <10µs latency wirespeed
90-240VAC external power, 0-40°C operation
MTBF 47 years similar model, FCC Class A

Expedited and overnight shipping options are available at checkout, priced by destination and service.
Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	3CR17161-91
Brand	3Com
Condition	New
MTBF	Similar models: 26-port 47 years (411,000 hours); 26-port PWR 25 years (221,000 hours)
Model	5500-EI 28-Port
Product Line	SuperStack 4 Switch 5500
Product Type	Stackable Managed Ethernet Switch
Supported Protocols	SNMP v1, v2, v3; RFC 2819 (RMON MIB); IEEE 802.3af Power over Ethernet; RIP v1/v2; OSPF; Protocol Independent Multicast-Dense Mode
Compliance Certifications	EN 60068 (IEC 68); CISPR 22 Class A; FCC Part 15 Class A; EN 55022 Class A; EN 61000-3-2; EN 61000-3-3; ICES-003 Class A; VCCI Class A; EN 55024; UL 60950; IEC 60950-1; EN 60950-1; CAN/CSA-C22.2 No. 60950-1-03

Compatible systems

No specific system or OS compatibility lists found in sources

Best for

Enterprise LAN
Supports stacking up to 8 units for 384 Fast Ethernet ports with 12.8 Gbps capacity, enabling scalable departmental networking with Layer 3 OSPF routing.
Office Networks
24x 10/100Base-TX ports connect workstations; 4x SFP for Gigabit uplinks, managed via SNMP v3 for secure VLAN segmentation.
School IT Labs
High MTBF (47 years similar model) and 0-40°C operation suit 24/7 use; supports RMON and port mirroring for monitoring student traffic.
ISP Edge
PIM-DM multicast and RIP/OSPF routing handle WAN aggregation; 8K MAC table manages high device density efficiently.

Voltage Input	90-240 VAC; 50/60 Hz; 1.0A maximum
Power Supplies	External AC; 90-240 VAC input

Width	440.0 mm (17.3 in)
Height	43.6 mm (1 RU)
Dimensions	Height: 43.6 mm (1.7 in or 1 RU); Width: 440.0 mm (17.3 in)

Humidity	10% to 95% non-condensing (operating and storage)
Storage Temperature	-10° to 70°C (14° to 158°F)
Operating Temperature	0° to 40°C (32° to 104°F)

Ethernet Ports	24 x 10/100Base-TX; 4 x SFP (mini-GBIC)
Stacking Capability	Up to 8 units; 384 Fast Ethernet ports maximum

3Com 5500-EI 28-Port 24 x 10/100Base-TX; 4 x SFP (mini-GBIC) Switch

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