Transition Networks C4120 Converter

10GBaseT to 10GBaseX Media Converter

  • Media converter module that provides an interface between 10GBase-T ports and 10GBase-X ports via an open SFP+ port,allowing users to convert their 10Gig Ethernet ports to the preferred type of cabling used in their networks.
  • The open SFP+ port supports a wide variety of Transition Networks 10GE SFP+ fiber modules.
  • Operating at Layer 1, the physical layer, data is passed through the converter at linespeed, making the C4120 ideal for applications where low latency isessential.
  • ION C4120 is a manageable device when installed in a managed ION chassis.


Spec Text

IEEE 802.3 IEEE 802.3an EEE 802.3ae EEE 802.3az

Data Rate

10 Gbps

Dip Switches

SW1: Copper Loopback 

SW2: Fibre Loopback

SW3: not used

SW4: Transparent Link Pass Through

Status LEDs

PWR (Power): On = power is on

L/A SFP+ (Fibre port link and activity statue): On = Link OK

Flashing = Link and Activity OK

Copper Link (Copper Link Status) On = Link OK

Copper Act (Copper Link Activity):  On = Activity OK


Width: 0.86” [21.85 mm] Depth: 6.5” [165 mm] Height: 3.4” [86.36 mm

Power Consumption

10.5 Watts - See product manual for chassis power guidelines


Operating: 0°C to 50°C

Humidity: 5% to 95% (non-condensing)

Altitude: 0 – 10,000 ft.


1 lb. [0.45 kg]


Greater than 250,000 hours (MIL-HDBK-217F

Greater than 687,000 hours (Bellcore)


FCC Class A, EN55022 Class A, EN55024, CE Mark



Ordering Information

Order Code Description
TN-C4120-1048 10GBase-T RJ-45 100m to 10GBase-X SFP+ Slot

More Information