C6120 Series
C6120 SeriesThis image is a family photo and is not representative of every SKU

ION DS1 – T1/E1/J1 Network Interface Device Module
4 x DS1 – T1/E1/J1 + 10/100 Ethernet over Fiber

C6120 Series



The ION C6120 is a managed T1/E1/J1 mux media converter module that provides a solution for those users that need to extend multiple T1/E1/J1 connections, along with a 10/100 Ethernet connection, all over fiber. The C6120 includes (4) RJ-48 ports, (1) 10/100 Ethernet port, and (1) fiber port. The device is available in versions that support fixed fiber connectors as well as SFP fiber modules offering support for a variety of fiber types, distances, and wavelengths to provide maximum flexibility across a variety of network topologies. CWDM SFPs can also be utilized to further increase the bandwidth capacity of the fiber infrastructure.

The C6120 converter must be used in pairs. A typical installation will include a modular card installed in a managed ION chassis linked over fiber to a stand-alone S6120 in a remote location.


  • (4) RJ-48 copper interfaces
  • (1) fiber interface (fixed or SFP)
  • (1) RJ-45 10/100Mbps Ethernet port
  • Auto-MDI/MDIX
  • Pause (Flow Control on Ethernet port)
  • Loopback via test set
  • Local and remote loopbacks
  • LEDs for device status and troubleshooting
  • Settings for line code, line build out, loopbacks and Alarm Indication Signal (AIS)
  • Access to complete status and configuration on local and remote device
  • Remote firmware upgrade
  • Remote management
  • Must be used in pairs


Standards ANSI T1.102
ITU I.431
ETSI 300-166
ETSI 300-233
TBR 12/13
AT&T Pub 62411
IEEE 802.3™-2008
Data Rate Copper ports (RJ-48): T1(J1) = 1.544Mb/s,
E1 = 2.048Mb/s
Ethernet port (RJ-45): 10/100Mbps
SFP port(s) (empty): 100Base-X/OC-3
Switch Numerous switch settings for line coding, line
build out, loopback and AIS
Status LEDs Power, Port Status, Loopback and AIS
Dimensions Width: 1.72” [44 mm]
Depth: 6.5” [165 mm]
Height: 3.4” [86 mm]
Power Consumption 6 Watts (max: dual fiber model)
5.5 Watts (max: single fiber model)
Environment Environment specs are dependent on the chassis chosen
Operating: 0°C to 50°C
Humidity: 5% to 95% (non-condensing)
Altitude: 0 – 10,000 ft.
Weight 1 lb. [0.45 kg]
MTBF 687,500 hours (Bellcore)
Certifications EN55022 Class A, EN55024, CE mark
Warranty Lifetime

Ordering Information

SKU Description  
Managed T1/E1/J1 mux Media Converter Module/ NID – C6120 C6120-1014

1310nm single mode (SC) [20 km/12.4 mi.]
Link Budget: 16.0 dB
to (4) RJ-48 [1.5 km/0.9 mi.]
plus 10/100Base-TX (RJ-45) [100m]

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C6120-1040 C6120-1040

*1 SFP port (Empty)
to (4) RJ-48 [1.5 km/0.9 mi.]
plus 10/100Base-TX (RJ-45) [100m]

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*SFP port uses standard 100Base-x/oc-3 SFP