You searched for "intercom module"
Digilent
Digilent USB-DIO24H/37 Data Acquisition, 24 Channel(s), USB, 32 bit
Part: 6069-410-055
24-channel USB digital input/output module for industrial control and automation systems.
Digilent
Digilent USB-CTR04 Data Acquisition, 4 Channel(s), USB, 32 bit
Part: 6069-410-057
USB data acquisition device with four counter inputs for event and pulse measurement.
Digilent
Digilent USB-DIO24/37 Data Acquisition, 24 Channel(s), USB, 32 bit
Part: 6069-410-047
24-channel USB digital input/output device for data logging and industrial testing applications.