Digium TDM410P Base Card PCI 2.2 Asterisk 4 Ports for connecting analog telephones or POTS lines Half-length Analog Card Up to 4 FXS or FXO Modules High Performance Echo Cancellation (HPEC) Software (Optional) TDM410 for use with a PCI 2.2 compliant slot - Bundled with VPMADT032 as TDM410PE