Bi-Directional Signal Interface for Dial-Up Telephone Line

RCI-100-MDM  1 Analog Input & 1 Digital Input
1 Analog Output & 1 Digital Output
RCI-200-MDM 2 Analog Inputs & 2 Digital Inputs
2 Analog Outputs & 2 Digital Outputs
RCI-400-MDM 4 Analog Inputs & 4 Digital Inputs
4 Analog Outputs & 4 Digital Outputs
RCI-800-MDM 8 Analog Inputs & Digital Inputs
8 Analog Outputs & Digital Outputs