Understanding Digium Cards naming scheme

Naming method looks like

  • “CCC X S O E/B “
  • CCC = is the interface type ,
  • TDM => PCI
  • AEX => PCI Express

It is read as

  • X => X is the no of port , it can be 4,8,24
  • S => S is the no of extensions or FXS lines
  • O => is the no of trunk lines
  • E/B can be either E which means hardwre echo cancellation module
  • B => Only Base module

My selected card is TDM-808EF
ie PCI card, with 8 port , 8 FXO , with echo cancellation

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