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Sangoma A4 Series Analog Cards

In your Asterisk system, the Digium A4 Series analog cards can support up to four connections per card. By utilizing Digium's single-port interface modules, the Digium A4 series cards can support one to four ports. Because the cards are modular, you can combine FXO and FXS interfaces. This gives you the exact port configuration you need. Digium A4 Series analog cards are available in low-profile, half-length PCI, and PCI Express configurations.

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The Sangoma A4 series analog telephony card has one (1) to four (4) ports and is compatible with phone systems such as Asterisk, FreePBX, and PBXact. A single PCI or PCI Express slot can support up to four PSTN calls. Because the cards are modular, you can mix and match FXO and FXS interfaces to create the exact port configuration you need. Single-channel interface modules provide 1-4 analog ports on the A4 series telephony card. Because of hardware echo cancellation options, compatibility with most commercial-grade servers and Linux operating systems, and a lifetime warranty, customers rely on Sangoma to deliver value-based telephony solutions.


  • Signaling a Loop Start or a Kewl Start.
  • Temperature range: 0° C to 50° C.
  • Digium’s patented VoiceBusTM technology improves audio quality.
  • 5-year warranty.
  • Asterisk requires DAHDI 2.7 or later.
  • Switchvox – Switchvox 5.8.1 or later is required.
  • Line (FXO) and station (FXS) modules should be combined.
  • Allows for up to four (4) single-port modules.
  • Optional carrier-grade echo cancellation module based on DSP.
  • 33MHz 32-bit.

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