SFP module ALLNET ALL4797 2.5Gbit RJ45 copper Ethernet uplink

The ALLNET ALL4797 SFP module provides a 2.5 Gbit/s RJ45 copper Ethernet interface in a compact SFP form factor. It is intended for installation in network devices with SFP ports to enable 2.5 Gbit copper uplinks where fiber SFPs are otherwise used. The module supports auto-negotiation for link speed and duplex and offers a convenient way to connect standard copper patch cables for short to medium distance Ethernet connections.

Advantages

This SFP module combines the physical convenience of an SFP transceiver with the widespread compatibility of RJ45 copper cabling. It allows network administrators to use existing Cat5e/Cat6 cabling for 2.5 Gbit links without changing the device form factor. The compact SFP design conserves port space on switches and routers while enabling a cost-effective copper uplink option. The device is suitable for quick replacement or upgrade of uplink ports without rewiring fiber infrastructure.

Suitable for

• Upgrading switch or router uplinks to 2.5 Gbit over copper
• Connecting to patch panels and structured cabling using RJ45
• Temporary or permanent copper links in small and medium business networks
• Media converters or devices that require SFP copper modules

Key specifications

• Interface: SFP form factor with RJ45 copper port
• Data rate: 2.5 Gbit/s
• Medium: 100/1000/2500BASE-T over twisted-pair copper
• Connector type: 8P8C (RJ45)
• Distance: suitable for short to medium copper links (dependent on cable category and environment)
• Auto-negotiation: supported for speed and duplex
• Power and thermal characteristics: compatible with standard SFP port power budgets

How to use

Insert the SFP module into a compatible SFP slot on the switch, router or media converter until it clicks into place. Connect a Cat5e or Cat6 patch cable to the RJ45 port on the module and to the remote device or patch panel. Ensure the connected devices are powered on and configured for the desired link speed; the module supports auto-negotiation to establish 2.5 Gbit/s where both ends support it. Monitor link LEDs or device management interfaces to confirm link status.

Recommendations

For reliable 2.5 Gbit performance, use high-quality Cat5e or Cat6 cables in good condition and keep cable lengths within recommended limits for copper Ethernet. Verify compatibility of the host device’s SFP slot with copper SFP modules and check switch firmware or vendor notes if link negotiation issues occur. Avoid exposing the module or cabling to excessive heat, moisture, or electromagnetic interference to maintain stable operation.