Cards and Gateways

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Asterisk Cards Explained

DMLink Voice Cards

OpenVox Voice Cards


Digium official cards are split into 3 main categories. Digital, Analog and Voice Processing.

  • Digital Cards are used to connect to ISDN network equipment.
  • Analog Cards are used to connect to PSTN network equipment.
  • Voice Processing Cards are used to process voice and take load from the CPU.

Digium Genuine Analog Cards FXS/FXO

  • Analog Cards are used to connect to PSTN network equipment.

There are FXO and FXS modules available for each Asterisk card, FXO will connect to a standard Telstra line. FXS will allow a standard telephone to connect to your PBX (eg A DECT phone). The card model number will reveal what the card should be used for. Most common is the TDM01B, this will connect to 1 standard telstra line. A TDM02B will connect to 2 standard telstra lines etc.

  • TDM400P - A 4 port base Card. PCI - Discontinued, See TDM410P
  • AEX400 - Same as a TDM400P with a PCI Express interface.
  • TDM410 - A 4 port base Card. PCI
  • AEX410 - Same as a TDM410 with a PCI Express interface.
  • TDM800P - An 8 port base Card. PCI
  • AEX800 - Same as the TDM800P with a PCI Express interface.
  • TDM2400P - A 24(FXO or FXS) Port Base Card. PCI
  • AEX2400 - Same as the TDM2400P with a PCI Express interface.

There are modules that attach to each card in Single or 4 port configuration.

  • S400M - 4 Port FXS Module for the XXX800 or XXX2400 cards.
  • X400M - 4 Port FXO Module for the XXX800 or XXX2400 cards.
  • S100M - 1 Port FXS Module for the XXX800 or XXX400 cards.
  • X100M - 1 Port FXO Module for the XXX800 or XXX400 cards.

You can also purchase an echo cancellation module for each card VPMADT032. This offers on-board high performance echo cancellation.

Cisco FXO Gateways

Cisco FXS Gateways

These FXS gateways offer traditional phone ports for either traditional analog equipment or as a method to convert a traditional PBX to VoIP lines.