We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Compact metal network media converter with SFP+ slot

Transition Networks

Transition Networks C4120-1048 10GBase-T Copper to Fiber Media Converter

SKU CH-8D8T-B99Y3 MPN C4120-1048

Converts 10 Gigabit copper links to fiber using an SFP+ slot for flexible uplinks

  • Device TypeTransceiver
  • Converts 10GBase-T copper to 10GBase-X fiber for extended reach
  • SFP+ expansion slot accepts compatible transceiver modules for flexible deployment
  • 10 Gigabit Ethernet throughput supports high-bandwidth network applications
  • Internal form factor integrates directly into compatible chassis or enclosures
  • Part of the C4120 series with model designation 1048 for clear identification

10GBase-T to Fiber Media Converter

The Transition Networks C4120-1048 converts 10 Gigabit Ethernet signals between 10GBase-T copper and 10GBase-X fiber. It is built for network engineers extending links beyond copper distance limits in enterprise or data-centre environments.

SFP+ slot for plug-and-play deployment

The unit accepts a single SFP+ transceiver, so installation is a matter of inserting the module and connecting the cables. The main difficulty is matching the transceiver wavelength and fiber type to the link budget; a mismatch will prevent the link from coming up.

Verify copper run length

Confirm that the existing copper segment does not exceed the 10GBase-T reach and that the fiber route supports the chosen transceiver distance. The converter requires a compatible SFP+ module, which is not included, and an available power source for the chassis.

Highlights

  • Converts 10GBase-T copper to 10GBase-X fiber for extended reach
  • SFP+ expansion slot accepts compatible transceiver modules for flexible deployment
  • 10 Gigabit Ethernet throughput supports high-bandwidth network applications
  • Internal form factor integrates directly into compatible chassis or enclosures
  • Part of the C4120 series with model designation 1048 for clear identification

Specifications

Device TypeTransceiver

Questions about this item

How do I verify the C4120-1048 is converting 10GBase-T to fiber correctly after installation?

Confirm the SFP+ module is seated, then check that the port status LEDs on both the copper and fiber sides show an active 10 Gigabit Ethernet link.

What comes with the C4120-1048 and what must I purchase separately?

The converter includes one SFP+ expansion slot; you must supply a compatible 10GBase-X SFP+ transceiver and fiber patch cable.

Which C4120 model should I choose for a 10GBase-T to fiber link?

Select the C4120-1048 when you need a single-slot internal media converter that bridges 10GBase-T copper to 10GBase-X fiber via an SFP+ slot.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.