The Digium S400M FXS module allows the TDM2400P card to terminate four analog telephones per module.

digium hardwareBecause of the modular design, a user can activate additional ports at any time with more S400M daughter cards. The S400M module passes all the call features any standard analog telephone line will support. Worldwide certifications are pending.

Note: To use the S400M module, you must provide 12V DC power to the TDM800P card or TDM2400P card.