The Digium X400M is a quad FXO interface module for the TDM2400P full-length PCI card. The X400M FXO module allows the TDM2400P card to terminate four analog telephone lines (POTS) per module. Because of the modular design, a user can activate additional ports at any time with more S400M or X400M daughter cards.
Digium X400M
The X400M module passes all the call features any standard analog telephone line will support. Worldwide certifications are pending.
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