What is the switching capacity and MAC table size?

The switch uses store-and-forward method with a 16K MAC address table, including 1,024 secure MAC addresses. It handles 9K jumbo frames and has 4MB packet buffer memory, ensuring efficient handling of large enterprise traffic loads without bottlenecks.

Does it support VLANs and QoS?

Yes, supports 255 IEEE 802.1Q VLANs for segmentation. QoS provides eight hardware queues per port with weighted round robin, strict priority, and auto-classification based on MAC, IP, DSCP, 802.1p CoS, or TCP/UDP ports, optimizing VoIP and critical traffic.

What security features are available?

Includes IEEE 802.1X user authentication, RADIUS for passwords, secure MAC locking, and port-based ACLs up to 100 rules filtering by DSCP, TCP/UDP, and IP addresses. Wirespeed hardware filtering and trusted IP management enhance enterprise security.

What are the power and environmental specs?

Operates on 90-240 VAC autoranging at 47-63 Hz, max 1.2A and 148W (717 BTU heat). Functions in 0°C to 40°C (32°F-104°F) and 10-90% non-condensing humidity, suitable for standard enterprise rack environments.

Is it rack-mountable and what are dimensions?

Yes, 1U rack-mount form factor. Dimensions: 17.3" W x 16.4" D x 1.7" H, weight 11.0 lbs. Designed as a fixed Gigabit workgroup and wiring closet switch for efficient space use in data centers.

3CR17402-91 - 3Com 3848 Switch

Name: 3CR17402-91 - 3Com 3848 Switch
Brand: 3Com
SKU: 3CR17402-91

3CR17402-91 - 3Com 3848 Switch | US IT Hardware

Product overview

The 3Com SuperStack 3 Switch 3848 (SKU: 3CR17402-91) is an enterprise-grade Layer 2 managed Gigabit Ethernet switch from the SuperStack 3 Switch 3800 Family. It features 48 x 10/100/1000BASE-T RJ45 ports and 4 x SFP Gigabit uplink ports (LC connectors, supporting 1000BASE-SX/LX transceivers sold separately). Key capabilities include a 16K MAC address table (1,024 secure), support for 255 IEEE 802.1Q VLANs, store-and-forward switching, 9K jumbo frames, and 4MB packet buffer. Advanced management supports IEEE 802.1X authentication, RADIUS, SSH/SSL, and QoS with eight hardware queues per port, weighted round robin, and strict priority queuing based on MAC, IP, DSCP, CoS, or TCP/UDP ports. Link aggregation follows IEEE 802.3ad LACP, with IEEE 802.3x flow control and auto-MDI/MDIX. Security includes secure MAC locking, ACLs (up to 100 rules), and port-based filtering. Power: 90-240 VAC, 148W max. Dimensions: 17.3" W x 16.4" D x 1.7" H, 11 lbs, 1U rack-mount. Ideal for enterprise wiring closets, workgroups needing high-density Gigabit connectivity with robust traffic management.

48x 10/100/1000 RJ45 + 4 SFP Gigabit ports
16K MAC addresses, 255 VLANs (IEEE 802.1Q)
9K jumbo frames, 4MB packet buffer memory
8 QoS queues/port, IEEE 802.3ad LACP aggregation
IEEE 802.1X, ACLs up to 100 rules, secure MAC
Store-and-forward switching, IEEE 802.3x flow control

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 #	3CR17402-91
Brand	3Com
Condition	New
Model	3848
Product Line	SuperStack 3 Switch 3800 Family
Product Type	Managed Layer 2 Ethernet Switch
Supported Standards	IEEE 802.1D (STP); IEEE 802.1p (CoS); IEEE 802.1Q (VLANs); IEEE 802.1w (RSTP); IEEE 802.1X (Security); IEEE 802.3ab (Copper Gigabit); IEEE 802.3ad (Link Aggregation); IEEE 802.3i (10BASE-T); IEEE 802.3u (Fast Ethernet); IEEE 802.3x (Flow Control); IEEE 802.3z (Fiber Gigabit)

Storage

MAC Address Table
Buffer Memory	4MB Packet buffer memory

Compatible systems

No specific system or OS compatibility data found in search results; switch is Layer 2 managed device compatible with standard enterprise network infrastructure.

Best for

Wiring Closet
Provides 48 Gigabit RJ45 ports and 4 SFP uplinks for high-density connections in central closets, supporting 255 VLANs and 16K MAC addresses for segmented enterprise networks.
Workgroup Switching
Delivers store-and-forward switching with 9K jumbo frames and 4MB buffer for reliable performance in departmental workgroups handling large data transfers.
Enterprise Backbone
Supports IEEE 802.3ad LACP link aggregation and QoS with 8 queues per port, ensuring prioritized traffic for VoIP and critical applications across campus networks.
Secure Access Layer
Features IEEE 802.1X authentication, secure MAC locking, and ACLs up to 100 rules for controlled access in secure enterprise environments.

Frequently asked questions

What ports does the 3Com SuperStack 3 Switch 3848 support?

Details

Shipping, warranty & returns

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Network & Communication

Flow Control	IEEE 802.3x full-duplex flow control; Backpressure flow control for half-duplex
Jumbo Frames	9K packets
VLAN Support	255 VLANs (IEEE 802.1Q)
Auto-Negotiation	Auto-negotiation of port speed, duplex, and connection (MDI/MDIX)
Link Aggregation	Manual and Automatic (LACP) per IEEE 802.3ad
Switching Method	Store and Forward
Multicast Support	Multicast snooping filtering; 256 multicast groups; IGMP v1 and v2; IGMP Query
Primary Port Speed	10/100/1000 Mbps
Quality of Service	Eight hardware queues per port; Weighted Round Robin queuing; Strict priority queuing; Priority based on MAC address range, IP address, DSCP, IEEE 802.1p CoS, TCP/UDP port; Auto classification of 3Com IP telephony traffic
Bandwidth Management	Ingress and egress rate limiting, port-based; 1 Mbps increments from 1M to line rate

Security

Authentication	IEEE 802.1X user authentication; RADIUS authentication; RADIUS management of switch passwords; Trusted IP management addresses
Security Features	Secure mode (locks MAC address); Wirespeed packet filtering in hardware; Port-based Access Control Lists (ACLs); Maximum 100 ACL rules per system (DSCP and TCP/UDP port-based CoS); ACLs filter on source/destination IP address
Management Interface	Telnet; SSH v1, v2 (56 bit DES); SSL (HTTPS) 40 bit, 56 bit DES

Max Current	1.2A
Max Wattage	148 W
Voltage Input	90-240 VAC autoranging
Operating Frequency	47-63 Hz

Humidity	10% - 90%, Non-condensing
Heat Dissipation	717 BTU
Operating Temperature	0°C to 40°C (32°F to 104°F)

Primary Ports	48 × 10BASE-T/100BASETX/1000BASE-T RJ45 ports; 4 × SFP Gigabit ports (LC connectors)
SFP Port Type	1000BASE-SX/LX (multimode/singlemode, sold separately)

3Com 3848 Switch