Cisco NM-8B-U

The Cisco NM-8B-U is a network module designed for use with Cisco routers. It is a network module that provides eight synchronous/asynchronous serial ports for connecting various devices such as modems, routers, and other networking equipment. The NM-8B-U module supports a wide range of protocols and is commonly used in enterprise networks for connecting remote sites or providing connectivity to legacy devices.