Description

The HP 4500-24-PoE Switch (JE047A) was formerly sold as the 3Com (3CR17571-91) 4500 PWR 26-port

This is the same product: See Hp cross refernece look up
http://pro-networking-h17007.external.hp.com/us/en/support/converter/index.aspx

JE047A – HP 4500-24-PoE Switch (3CR17571-91)
Product name: HP 4500-25-PoE Switch
Product number: JE047A
Product type: Fixed Port L3 Managed Ethernet Switches
Product series: HP 4500 Switch Series
Warranty duration: Limited Lifetime† – Next Business Day with HP

4500 PWR Switch 26-Port stackable Ethernet switch features Power over Ethernet (PoE), rich Layer 2 switching and dynamic Layer 3 routing, cost-effective, high performance platform.
The robust security, extensive management, traffic prioritization and quality of service features, the Switch 4500 PWR 26-Port capably handles emerging business applications.
Interfaces/Ports
Total Number of Network Ports 24
Uplink Port Yes
Stack Port Yes
Number of Network (RJ-45) Ports 24
Port/Expansion Slot Details 2 x Gigabit Ethernet Expansion Slot
Port/Expansion Slot Details 2 x Gigabit Ethernet Uplink
Port/Expansion Slot Details 24 x Fast Ethernet Network
Media & Performance
Media Type Supported Twisted Pair
Ethernet Technology Fast Ethernet
Network Technology 10/100/1000Base-T
I/O Expansions
Number of Total Expansion Slots 2
Expansion Slot Type SFP
Number of SFP Slots 2
Network & Communication
Layer Supported 3
Management & Protocols
Manageable Yes
Management
802.1Q Port-based VLANs
CLI via the console port or Telnet, embedded web management interface
3Com management: 3Com Network Supervisor, 3Com Network Director, 3Com Enterprise Management Suite
Dynamic Voice over IP:
Unique Voice VLAN feature detects the presence of IP phones and dynamically assigns switch ports to the Voice VLAN, enabling automated configuration and prioritization of VoIP traffic. This powerful feature minimizes cost and complexity associated with adding or moving IP phones.
Prioritization and Bandwidth Management:
Eight priority queues per port enable 802.1p Class of Service / Quality of Service (CoS/QoS)
Power Description
Input Voltage 110 V AC
Input Voltage 220 V AC
Power Source Power Supply
Physical Characteristics
Form Factor Desktop
Form Factor Rack-mountable
Height 1.7″
Width 17.3″
Depth 10.6″
Weight (Approximate) 7.28 lb
Additional Information
Power over Ethernet (PoE):

Provide inline power to attached devices via industry-standard 802.3af Power over Ethernet (PoE).
The internal power supply provides a power budget of 300 Watts, which is dynamically allocated to PoE ports.
Security:
802.1X network access control
MD5 cipher-text authentication and clear-text authentication for RIP v2 packets and SNMP v3 traffic
RADIUS authentication ensures secure access to resources. Additionally, RADIUS Authenticated Device Access (RADA) enables authentication of attached devices via MAC address.
Port-based Access Control Lists (ACLs)
Secure Shell (SSHv2) and SNMPv3 support ensure secure management access to switches via authentication and encryption of management traffic.
Certifications & Standards
IEEE:
IEEE 802.af
IEEE 802.1D
IEEE 802.1p
IEEE 802.1Q
IEEE 802.1w
IEEE 802.1X
IEEE 802.3ad
IEEE 802.3i
IEEE 802.3u
IEEE 802.3x
Emissions:
CISPR 22 Class A
FCC Part 15 Class A
EN 55022 1998 Class A
ICES-003 Class A
VCCI Class A
EN 61000-3-2 2000, 61000-3-3
Safety agency certifications:
UL 60950
IEC 60950-1
EN 60950-1
CAN/CSA-C22.2, No. 60950-1-03