C6310-3340 New

ION POTS Media Converter

  • C6310-web
  • C6310-front-web

The ION C6310-3340 is a chassis-based media converter module that provides an interface between a twisted pair RJ-11 port and a fiber port, allowing users to connect central-office
voice grade signals to distant Plain Old Telephone equipment (POTS) utilizing standard telephone signaling. Two units are required to implement an end to end system. The first
unit connects to a telephone line or PBX and is configured to act as a telephone (FXO Mode) and has the ability to detect ringing voltages. The second unit is the reciprocal unit and is
configured to have the ability to act as a Central Office and connects to a telephone device (FXS Mode).

Together, the modules allow legacy analog phone lines to be extended over fiber for both permanent installations as well as temporary job-site installations.

C6310-3340 New

C6310-3340 Overview


  • Audio transmission of voice grade signals
  • Supports ringing at distant end
  • Supports Caller ID
  • Configurable worldwide country formats
  • Must be deployed in pairs
    – ION chassis card and stand-alone unit
    – ION chassis card and ION chassis card
    – Stand-alone unit and stand-alone unit
  • Single product configurable to either FXO mode or FXS mode
  • Automatic Ring Down supported when both converters are configured to FXS Mode
  • SFP based product
    – Uses Gigabit Ethernet SFP Modules
    – Lantronix offers a wide variety of SFP modules to support multimode or singlemode fiber, as well as dual or single strand fiber installations
  • SNMP Management supported when installed in a managed ION chassis
  • Supports remote management of paired unit, in-band, over the fiber
  • Electrical interface is provided through an RJ-11 female connector
  • Field upgradeable firmware
  • Only supports analog POTS lines
  • Compatible with traditional telephone modems


  • Provides voice grade service to extend useful life of legacy analog telecom equipment
  • Acts as a telephone and connects to a telephone line or PBX
  • Acts as a central office and connects to a telephone device
  • For use in permanent or temporary job-site installations

C6310-3340 Tech Specs


    • FCC Part 68
    • ETSI ES 203-021 (TBR21)
    • ISED CS-03

    Analog Port

    • Connector: RJ11

    FXS Mode

    • Impedance: 600 ohms
    • REN: 1.0
    • Ring Cadence: 25 Hz

    FXO Mode

    • Impedance: 600 ohms
    • Battery Source: 48 VDC +/- 5V
    • Ringing Supply: 90Vp-p
    • Ring Frequency: 16-65 Hz

    Dip Switches 

    • SW1 Up = FXO Down = FXS
    • SW2 Up = Normal Down = FXS Reversed
    • SW3 Up = U-Law Down = A-Law
    • SW4 not used
    • SW5 – SW8 Country Code Select

    Status LEDs 

    • Pwr: On = power is on
    • FL: On = fiber link is up
    • ACTC: On = Off-Hook, Blink = Ringing, Off = On-Hook


    • Width: 0.86” [22 mm]
    • Depth: 6.5” [165 mm]
    • Height: 3.4” [86 mm]

    Power Consumption

    • 2.0 Watts without the SFP


    •  Operating: 0°C to 50°C
    • Storage: -40°C to +85°C
    • Humidity: 5% to 95% (non-condensing)
    • Altitude: 0 – 10,000 ft.


    • 1 lb. [0.45 kg]


    • Emissions: EN55032 Class A, FCC Part 15 Class A
    • Immunity: EN55024
    • Safety: CE Mark


    • Lifetime

C6310-3340 Resources

Application Spotlights
Press Releases
Case Studies

C6310-3340 Part Numbers

C6310-3340 C6310-3340

Chassis Card Media Converter
Twisted Pair (RJ-11) (5 km/3.1 mi.) to (1) SFP Slot (empty)

Lantronix Part # Name Description Order Now

Fiber Type, Optical Wavelength, Transmission Distance, and Link Budget all based on selected SFP module. C6310-3340 Supports any standard 1000Mbps SFP modules.

Must be paired with another stand-alone S6310-3340 or a chassis-based C6310-3340.

Compatible Accessories

Lantronix Part # Legacy Part # Name Description Order Now
SFP Modules SFP Modules See Relevant SFP Modules