Digium

Digium Profile - Founded in 1999, Digium is the creator and primary developer of Asterisk®, the industry's first Open Source PBX. Digium is the original creator and primary developer of Asterisk, the industry's first open source PBX and Asterisk Business Edition, the professional-grade version of Asterisk. Used in combination with Digium's PCI telephony interface cards, Asterisk offers a strategic, highly cost-effective approach to voice and data transport over IP, TDM, switched and Ethernet architectures.

Digium provides quality hardware and software products that enable telephony applications including legacy PBX, IVR, auto attendant, next generation gateways, media servers and application servers.

Digium Card Naming Conventions:

• The naming convention for the TDM Series bundles is as follows: TDM# X Y B
  "TDM4" denotes that the card is TDM400P, "X" denotes the number of FXS modules, "Y" denotes the number of FXO modules, and "B" indicates that this product is a bundle without Echo Cancellation. "E" indicates that this product is a bundle with Echo Cancellation or "P" denotes that the card is the base card without any Modules bundled.
• Example: TDM21B is a 2 FXS / 1 FXO card without Echo Cancellation. This is a card within the TDM400 Series, unlike all other models the 400 series does not add the 4 into the Bundled Part Name.
• Example: TDM2413E is a 4 FXS / 12 FXO card with Echo Cancellation. This is a card within the TDM2400 Series.