Cisco 8OC03/ATM/TS-IR-B

The Cisco 8OC03/ATM/TS-IR-B is a line card module used in Cisco routers. It is designed for high-speed data transmission over optical networks using the Synchronous Optical Networking (SONET) standard. The "8OC03" in the name refers to the card's capability to support up to 8 OC-3 (Optical Carrier level 3) interfaces, which have a data rate of 155.52 Mbps. The "ATM" indicates that the card supports Asynchronous Transfer Mode (ATM) technology, which is a protocol used for transmitting data in fixed-size cells. The "TS-IR-B" stands for Time Slot Interchange (TSI) - Inverse Multiplexing over ATM (IMA) - Broadband, which is a specific feature set of the card that allows for flexible allocation of bandwidth across multiple ATM connections.