Digium 4 Port FXS

Digium 4 Port FXS

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Quick Overview

FXS Analog Card

4 – Port Analog Telephony Card

The 4-port FXS Analog Card supports up to four (4) connections per card in the Asterisk system. The modular nature of the cards allows you to mix and match between line (FXO) and station (FXS) interfaces, giving the exact port configuration required.

FXS is the ‘Foreign eXchange Subscriber’ interface (the plug on the wall) delivers analog telephony services to your home by local phone companies through a circuit consisting of two copper wires; connected to the subscriber equipment (telephones, modems, and fax machines).

Primarily, the services provided by an FXS interface to any subscriber device are:
* Dial Tone
* Battery Current
* Ring Voltage

Product Description

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Product Tags

  • Applications

    • Connect Asterisk-based systems to analog phone lines • Connect analog PBX systems to VoIP services • Channel Bank Replacement / Alternative • Gateway Termination to analog telephones/lines • Suitable for Small Office/Home Office (SOHO) and Small and Medium Business (SMB) applications


    • One (1) - four (4) analog ports • PCI or PCI Express bus architectures • Combine line (FXO) and station (FXS) modules • Accepts up to four (4) single-port modules • Optional DSP -based carrier grade echo cancellation module
    • 32-bit 33MHz • Loop Start or Kewl Start Signaling • Temperature: 0° to 50° C • Digium patented VoiceBus™ technology for better audio
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