Description

The HP (JF027A) was formerly sold as the 3Com (3CB9LF20MM)

The HP JF027A and the 3COM 3CB9LF20MM are the same product HP 20-port 100Base-FX 4007 Module
See Hp cross refernece look up:
http://pro-networking-h17007.external.hp.com/us/en/support/converter/index.aspx
3COM corporation was acquired by HP on November 11, 2005

Product name: HP 20-port 100Base-FX 4007 Module
Product number: JF027A
Product type: Connectivity Modules
Product series: HP Switch FX Modules

Model number: 3CB9LF20MM (CSS5-IOM-8FE)
Product Name: Switching Module
Switching Module – 20 x 100Base-FX
Marketing Information
High-Density Fast Ethernet Switching Module:
Enhance the flexibility and performance of the 3Com® Switch 4007 and Switch 4007R with this high-density Layer 2 fiber 100BASE-FX Fast Ethernet switch module.
Technical Information
Application/Usage: Switching Network
Interfaces/Ports
Interfaces/Ports: 20 x 100Base-FX
Interfaces/Ports Details: 20 x MT-RJ Port 100Base-FX
Media & Performance
Connectivity Media: Optical Fiber 100Base-FX
Data Transfer Rate: 100 Mbps Fast Ethernet
Management & Protocols
Protocols Fast Ethernet
Protocols SNMP
Protocols RMON
Protocols IGMP
Controls/Indicators
Status Indicators
Port status
Power
Environmental Conditions
Temperature 32°F (0°C) to 122°F (50°C) Operating
Humidity 10% to 90% Operating
Physical Characteristics
Dimensions 1.0″ Height x 15.3″ Width x 13.4″ Depth
Weight (Approximate) 2.90 lb
Additional Information
Layer 2 module offers 20-port fiber switching 100BASE-FX configuration
Supports port-based Virtual LANs, Internet Group Management Protocol (IGMP) snooping
Support for four groups of RMON and link aggregation
Compatibility
Switch 4007R Layer 2 Gigabit Ethernet Starter Kit
Switch 4007R Layer 3 Gigabit Ethernet Starter Kit
Switch 4007R Eight-Slot Chassis
Switch 4007 Layer 2 Gigabit Ethernet Starter Kit
Switch 4007 Seven-Slot Chassis
Switch 4007 Layer 3 Copper Fast Ethernet Starter Kit
Switch 4007 Layer 3 Gigabit Ethernet Starter Kit
Switch 4007 Layer 3 Fiber Fast Ethernet Starter Kit
Certifications & Standards
IEEE 802.3U-LAN