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SPECIFICATIONS
Information in this section is relevant
to all members of the 3Com Baseline
Switch 2900 Plus family, unless
otherwise stated.
CONNECTORS
Switch 2916-SFP Plus
16 10BASE-T/100BASE-X/1000BASE-T
Switch 2924-SFP Plus
24 10BASE-T/100BASE-X/1000BASE-T
Switch 2924-PWR Plus
24 10BASE-T/100BASE-X/1000BASE-T,
PoE-enabled
Switch 2948-SFP Plus
48 10BASE-T/100BASE-X/1000BASE-T
All switches
4 Gigabit SFP ports, dual-purposed
with 4 of the above 10/100/1000 ports
(configurable as 10/100/1000 or SFP)
All copper ports are auto MDI/MDIX,
auto-negotiating RJ-45
Front-mounted console port
PERFORMANCE
Switch 2916-SFP Plus
32 Gbps switching capacity, max.
23.7 Mpps forwarding rate, max.
Switch 2924-SFP Plus
48 Gbps switching capacity, max.
35.5 Mpps forwarding rate, max.
Switch 2924-PWR Plus
48 Gbps switching capacity, max.
35.5 Mpps forwarding rate, max.
Switch 2948-SFP Plus
96 Gbps switching capacity, max.
71.4 Mpps forwarding rate, max.
All models
Wirespeed performance
Store-and-forward switching
ORDERING
INFORMATION
LAYER 2 SWITCHING
8,192 MAC addresses in address table
256 port-based VLANs (IEEE 802.1Q)
IEEE 802.3ad Link Aggregation,
automated (LACP) and manual
aggregation: 8 trunks, max.; 8 ports
per trunk, max.
Auto-negotiation of port speed and
duplex
Auto-voice VLAN for automatic
vendor-independent segregation
and prioritization of VoIP traffic
IEEE 802.3x flow control
(half- and full-duplex)
IEEE 802.1D Spanning Tree Protocol
(STP)
IEEE 802.1w Rapid Spanning Tree
Protocol (RSTP)
Internet Group Management Protocol
(IGMP) v1 and 2 on Layer 2 interfaces
Jumbo frames (up to 9K bytes)
Multicast filtering
CONVERGENCE
4 hardware queues per port, with
IEEE 802.1p Class of Service/Quality
of Service (CoS/QoS) on egress
Weighted Round Robin queuing
Traffic prioritization at Layer 2 using
802.1p QoS, and at Layer 3 using Type
of Service (TOS) with Differentiated
Services Code Point (DSCP)
Ingress/egress rate shaping
Auto VLAN assignment for voice
traffic determined by vendor OUI
CoS remarking for prioritization
of VoIP traffic
SECURITY
IEEE 802.1X Network login
Access Control Lists (ACLs)
MAC-based Layer 2 filtering rules:
• source/destination address
• Ethertype
• CoS
• VLAN
IP-based Layer 3 filtering rules:
• protocol
• source/destination address
• TCP/UDP port
• DSCP value
• IP precedence
Management communications are
encrypted via HTTPS
PRODUCT DESCRIPTION
3Com Baseline Switch 2916-SFP Plus
3Com Baseline Switch 2924-SFP Plus
3Com Baseline Switch 2924-PWR Plus
3Com Baseline Switch 2948-SFP Plus
Transceivers
3Com 1000BASE-SX SFP
3Com 1000BASE-LX SFP
Visit www.3com.com for more information about 3Com secure converged network solutions.
3Com Corporation, Corporate Headquarters, 350 Campus Drive, Marlborough, MA 01752-3064
3Com is publicly traded on NASDAQ under the symbol COMS.
Copyright © 2007 3Com Corporation. All rights reserved. 3Com and the 3Com logo are registered trademarks of 3Com Corporation. All other company and product
names may be trademarks of their respective companies. While every effort is made to ensure the information given is accurate, 3Com does not accept liability for
any errors or mistakes which may arise. All specifications are subject to change without notice.
POWER OVER ETHERNET
(Switch 2924-PWR Plus, only)
IEEE 802.3af
180W per switch, max.
MANAGEMENT
Web-based configuration and
management
System configuration with SNMP
v1 and 2
Compatible with SNMP management
tools like 3Com Network Supervisor
and 3Com Network Director
*
CLI via console
Management communications are
encrypted via HTTPS
LED INDICATORS
Module active, power, network
traffic/duplex mode, link status/speed
AT-A-GLANCE TRAFFIC
MONITORING
Ports: active, enabled, disabled
Modules: present, active
POWER SUPPLY
Switch 2916-SFP Plus
Current rating: 1A, max.
Power dissipation: 198.0 BTU/hr, max.
Switch 2924-SFP Plus
Current rating: 1.5A, max.
Power dissipation: 286.7 BTU/hr, max.
Switch 2924-PWR Plus
Current rating: 5.1A, max.
Power dissipation: 1,194.6 BTU/hr, max.
Switch 2948-SFP Plus
Current rating: 1.5A, max.
Power dissipation: 238.9 BTU/hr, max.
All switches
Input voltage: 100-240 VAC, 50/60 Hz
Power inlet: IEC 320
DIMENSIONS
Height: 4.4 cm (1.7 in or 1 RU)
Width: 44.0 cm (17.3 in)
Depth–
2916-SFP, 2924-SFP, 2924-PWR:
17.1 cm (6.7 in)
2948-SFP: 23.8 cm (9.4 in)
Weight–
2916-SFP: 1.8 kg (4.0 lb)
2924-SFP: 1.6 kg (3.5 lb)
2924-PWR: 1.9 kg (4.2 lb)
2948-SFP: 2.5 kg (5.5 lb)
3COM
BASELINE SWITCH 2900 PLUS FAMILY
®
ENVIRONMENTAL REQUIREMENTS
Operating temperature: 0° to 40°C
(32° to 104°F)
Operating humidity: 10 to 95%
(non-condensing)
Standard: EN 60068 (IEC 68)
REGULATORY AND AGENCY
APPROVALS
Safety: UL 60950-1, EN 60950-1,
CSA 22.2 60950-1, IEC 60950-1
Emissions: EN 55022 Class A,
EN 61000-3-2, EN 61000-3-3,
FCC Part 15 Subpart B Class A,
CISPR22 Class A, ICES-003 Class A,
VCCI Class A
Immunity: EN 55024
IEEE STANDARDS SUPPORTED
IEEE 802.1ad Provider Bridges
IEEE 802.1d Spanning Tree
IEEE 802.1p Priority Tags
IEEE 802.1Q VLANs
IEEE 802.1X Port Security
IEEE 802.1w Rapid Spanning Tree
IEEE 802.3 Ethernet
IEEE 802.3ab Gigabit Ethernet
IEEE 802.3ad Link Aggregation
IEEE 802.3af Power over Ethernet
(Switch 2924-PWR only)
IEEE 802.3u Fast Ethernet
IEEE 802.3x Flow Control
IEEE 802.3z Gigabit Ethernet
ISO 8802-3
PACKAGE CONTENTS
Switch unit, power cord, self-adhesive
rubber pads, console cable, rack-mount
kit, product CD, warranty and safety
information flyer
WARRANTY AND OTHER SERVICES
Three Year Limited Hardware Warranty
Limited Software Warranty for 90 days
Advance Hardware Replacement with
Next Business Day shipment in most
regions
90 days of telephone technical support
www.3com.com/warranty
Refer to
for details.
* Switch 2948-SFP Plus will be supported in
future release of 3Com Network Supervisor
and Network Director, planned for 3rd quarter
calendar year 2007
3COM SKU
3CBLSG16
3CBLSG24
3CBLSG24PWR
3CBLSG48
3CSFP91
3CSFP92
401044-001 05/07