TDM / PDH / Voice Cards

The TDM / PDH FXO / FXS Voice card is a POTS (Plain Old Telephone System) over fiber converter that required to implement an end to end system. FXO mode connects to a telephone line (PSTN) or PBX station line and has ability to detect ringing voltages and to act as a telephone. FXS mode is the reciprocal unit and has ability to act as PSTN and connects to a telephone device.