“Analogue Intercom systems tend to be wired using twisted pair cable. Traditionally, 1-pair or 2-pair telephone type cable (typically to BT spec. CW1308) was used to connect each user intercom station to the central exchange equipment.
An IP intercom is a device that provides two-way audio communication between different locations. One IP intercom can be connected to another intercom or to a central computer server. The computer runs software that manages the connection to one or many intercoms.