Ordering information specifications – 3Com Unified Gigabit Switch User Manual
Page 4
CONNECTORS
24 total available ports, comprised of:
20 auto-negotiating 10BASE-T/
100BASE-TX/1000BASE-T ports
configured as auto MDI/MDIX
4 dual-personality Gigabit port pairs,
configurable as 10BASE-T/100BASE-TX/
1000BASE-T or SFP
PERFORMANCE
48 Gbps, max.
Wirespeed performance across ports
LAYER 2 SWITCHING
8,196 MAC addresses in address table
256 port-based VLANs (IEEE 802.1Q);
max.
IEEE 802.3ad Link Aggregation, Link
Aggregation Control Protocol (LACP)
Auto-negotiation of port speed and
duplex
IEEE 802.3x full-duplex flow control
IEEE 802.1D Spanning Tree Protocol
(STP)
IEEE 802.1w Rapid Spanning Tree
Protocol (RSTP)
IEEE 802.1s Multiple Spanning Tree
Protocol (MSTP)
Internet Group Management Protocol
(IGMP) snooping on Layer 1 and 2
interfaces
CONVERGENCE
4 hardware queues per port
IEEE 802.1p Class of Service/Quality
of Service (CoS/QoS)
Auto-voice VLAN for automatic
vendor-independent segregation
and prioritization of VoIP traffic
Wi-Fi Multimedia (WMM)
256 Access Control Lists (ACLs)
4 BSSIDs per radio
Diffserv Codepoint (DSCP)
SECURITY
Rogue AP detection and mitigation
IEEE 802.1X network login user
authentication
EAP over LAN (EAPoL) transport with
PEAP and EAP-TLS authentication
RADIUS server authentication
(RFC 2618)
Local MAC authentication
Automatic VLAN assignment via
RADIUS server
IEEE 802.1X user authentication of
switch management on switch Telnet
and console sessions; multiple access
privilege levels
Hierarchical management and password
protection for management interface
WIRELESS ENCRYPTION
WPA Personal and Enterprise
WPA 2 Personal and Enterprise
AES (CCMP): 128-bit (FIPS-197)
WEP 40/64- and 104/128-bit
TKIP: RC4 40-bit
SSL and TLS: RC4 128-bit and RSA
1024- and 2048-bit
EAP-TLS, EAP-TTLS/MSCHAPv2,
PEAPv0/EAP-MSCHAPv2, EAP-SIM
POWER OVER ETHERNET
IEEE 802.3af
15.4W per port, max.
ACCESS POINT SUPPORT
Ships with support for up to 24 of the
below access points:
• 3Com Wireless 7760 11a/b/g PoE
Access Point (3CRWE776075)
• 3Com Wireless 8760 Dual-Radio
11a/b/g PoE Access Point
(3CRWE876075)
Max. 30 users per AP radio;
250 wireless clients max. per switch
ROAMING SUPPORT
Inter-AP roaming
Fast roaming
Dynamic load balancing
MANAGEMENT
Embedded GUI web management
interface
CLI via console or Telnet
System configuration with SNMP v1,
2c and 3 encryption
SSH v2 encryption
Configuration file for backup and
restore; dual configuration files
available
Dual firmware images
Remote Monitoring (RMON) groups:
statistics, history, alarm and events
Port mirroring/monitoring
System upgrade via HTTP and
TFTP (RFC1350)
Syslog
SNTP
RADIO RESOURCE MANAGEMENT
Automatic channel assignment
Dynamic load balancing
Bandwidth management (WMM)
DIMENSIONS
Height: 4.4 cm (1.7 in or 1 RU)
Width: 44.0 cm (17.3 in)
Depth: 41.5 cm (16.3 in)
Weight: 5.9 kg (13.0 lb)
POWER SUPPLY
Input voltage: 100-240 VAC, 50/60 Hz
Current rating: 8A, max.
Power consumption: 465W, max.
Power dissipation: 207 BTU/hr, max.
ENVIRONMENTAL REQUIREMENTS
Operating temperature: 0° to 40°C
(32° to 104°F)
Storage temperature: -40° to 70°C
(-40° to 158°F)
Humidity (operating and storage):
10% to 95% non-condensing
Standard: EN 60068 (IEC 68)
RELIABILITY
MTBF: 36 years (315,000 hours)
LED INDICATORS
Port speed or PoE status, SFP module
presence, fan, system
IEEE STANDARDS SUPPORTED
IEEE 802.1d Spanning Tree
IEEE 802.1p Priority Tags
IEEE 802.1Q VLANs
IEEE 802.1s Multiple Spanning Tree
IEEE 802.1X RADIUS
IEEE 802.1w Rapid Spanning Tree
IEEE 802.3 Ethernet
IEEE 802.3ab Gigabit Ethernet
IEEE 802.3ac VLAN tag
IEEE 802.3ad Link Aggregation
IEEE 802.3af Power over Ethernet
IEEE 802.3u Fast Ethernet
IEEE 802.3x Flow Control
IEEE 802.3z Gigabit Ethernet
IEEE 802.11a 54 Mbps, 5 GHz
IEEE 802.11b 5.5 and 11 Mbps, 2.4 GHz
IEEE 802.11d International roaming
extensions
IEEE 802.11g 54 Mbps, 2.4 GHz
IEEE 802.11h Spectrum managed 802.11a
IEEE 802.11i Enhanced security
EMISSIONS / AGENCY APPROVALS
EN 55022 Class A
FCC Part 15 Subpart B Class A
ICES-003 Class A
VCCI Class A
CISPR 22 Class A
EN 61000-3-2, 61000-3-3
IMMUNITY
EN 55024, 60601-1-2
SAFETY AGENCY CERTIFICATIONS
UL 60950-1
EN 60950-1
CSA 2.22 # 60950-1
IEC 60950-1
EU RoHS Compliant
PACKAGE CONTENTS
Switch unit, power cord, self-adhesive
rubber pads, rack-mount kit, Quick
Start Guide, warranty flyer
SYSTEM PREREQUISITES
Windows PC with Internet Explorer
version 6.0 or greater required for GUI
web management
DHCP server
WARRANTY AND OTHER SERVICES
Three-year Hardware Warranty,
including fans and power supply
Limited Software Warranty for 90 days
Advance Hardware Replacement
with Next Business Day shipment in
most regions
90 days of telephone technical support
Refer to
for details.
3COM
®
UNIFIED GIGABIT SWITCH
Visit 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 © 2008 3Com Corporation. All rights reserved. 3Com, the 3Com logo, IntelliJack, and NBX are registered trademarks, and Express is a service mark, of
3Com Corporation. Wi-Fi and WMM are registered trademarks of the Wi-Fi Alliance; Wi-Fi CERTIFIED, WPA, and WPA2 are trademarks of the Wi-Fi Alliance. 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.
401001-005 02/08
PRODUCT DESCRIPTION
3COM SKU
3Com Unified Gigabit Wired and Wireless PoE Switch 24-Port
3CRUS2475
Transceivers
3Com 1000BASE-SX SFP
3CSFP91
3Com 1000BASE-LX SFP
3CSFP92
Supported Access Points
3Com Wireless 7760 11a/b/g PoE Access Point
3CRWE776075
3Com Wireless 8760 Dual-Radio 11a/b/g PoE Access Point
3CRWE876075
3Com Global Services
3Com Wireless LAN Site Survey, Network Health Check,
Installation Services and Express
SM
Maintenance
3Com University Courses
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INFORMATION
SPECIFICATIONS