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OpenVox A400M can be used for connecting analog telephones and analog POTS lines through a PC. It’s designed to work with lower power system. It supports combinations of FXS and/or FXO modules for a total of 4 lines.

OpenVox A400M delivers great voice quality in the telephony systems. With interchangeable FXS/FXO modules, it can eliminate the requirement for separate channel banks or access gateways.

The A400M consists of two parts: the A400MM and the A400MS. The A400MM connects Mini PCI slot while the A400MS installs FXS/FXO modules. The A400MS contains 4 module banks. Each bank supports one analog interface. The module banks may be filled with up to 4 FXO or FXS modules enabling the creation of any combination of ports. Scaling of an analog card solution is accomplished by simply adding additional cards.

A400M works with Asterisk®, Askozia®, Elastix®, FreeSWITCH, PBX in a Flash, trixbox®, Yate and IPPBX/IVR projects as well as other Open Source and proprietary PBX, Switch, IVR, and VoIP gateway applications.

Target Applications

  • Channel Bank Replacement / Alternative
  • Small Office Home Office (SOHO) applications
  • Small and Medium Business (SMB) applications
  • Gateway Termination to analog telephones/lines

Technical Specifications

  • Up to 4 ports through a combination of FXS and FXO modules
  • 4 RJ-11 interfaces on a single PCI bracket
  • Mini PCI type III,
  • Firmware accelerate I/O access to achieve high stability
  • Designed for low-power systems
  • Power: 1.8W Minimum, 11.6W Maximum
  • Operation temperature: 0°C to 50°C
  • Storage temperature: -40°C to 125°C
  • Dimensions:
    A400MM: 59.6mm*44.6mm*10mm
    A400MS: 11.2cm*11.3cm*1.3cm
  • Weight:
    A400MM: 14g
    A400MS: 64g

Operating Systems

  • Linux (all versions, releases and distributions from 1.0 up)

Minimum Hardware Requirement

  • 200-Mhz CPU
  • 32MB RAM
  • Available Mini PCI Slot


  • RoHS Compliant
  • Certificates: FCC, CE and LVD



  • Caller ID and Call Waiting Caller ID
  • ADSI Telephones
  • Loopstart Signaling Support
  • Industry 1st Mini PCI analog Card
  • Up to 4 Simultaneous PSTN Calls (Per Mini PCI Slot)
  • Interchangeable FXS and FXO modules
  • 3-Month "No Questions Asked" Return Policy
  • Five Year Warranty


With A400M base board + 1 FXO100/FXS100
High Best Best Cost-effective