8 isolated analog channels (4 switch control inputs and 4 relay control outputs)

Uses 300 baud modem (Bell 103) for bullet proof connections

Error control is via triple redundant packet transmission

Relays are latched in the last valid position if telco connection is lost

Relays are SPDT contacts rated at .5 amps

Relays are configurable to have energized state either normally closed of normally open so that a loss of power can cause a change of state

Status LEDs indicate power, carrier detect, communication link, modem mode, switch status, relay status

NEBS level 3 compliant