Telecom interface integrated circuits (ICs) are electrical components used to facilitate communication between two or more devices. They are typically found in telecom application boards and other network interfaces where serial and parallel communications need to be established. These ICs are designed to handle high-speed data transfers, allowing multiple devices to communicate with each other in a reliable and secure manner. The interface ICs also provide protection against interference, noise, and other disturbances that can disrupt the data flow. By using telecom interface ICs, manufacturers are able to integrate communications technologies such as cellular and Ethernet into their products without having to use multiple circuits and signals. This helps them keep device costs low while increasing performance and reliability.