Cisco CHOC12/STS3-IR-SC

The Cisco CHOC12/STS3-IR-SC is a line card module used in Cisco routers. It stands for Channelized OC12/STS3c IR Single-Mode Short Reach, and it is designed to provide high-speed connectivity for data and voice traffic over optical networks. The CHOC12/STS3-IR-SC supports channelized OC12 (Optical Carrier 12) or STS3c (Synchronous Transport Signal 3) interfaces, which can be used for various applications such as SONET (Synchronous Optical Networking), SDH (Synchronous Digital Hierarchy), or DWDM (Dense Wavelength Division Multiplexing) networks. The "IR" in the name indicates that it is designed for use with single-mode fiber optic cables, and the "SC" refers to the type of connector used for the optical interface.