The Juniper Dual-port Synchronous Serial PIM provides the physical connection to Serial network media types, receiving incoming packets from the network and transmitting outgoing packets to the network. Juniper Dual-port Synchronous Serial PIM is equipped with a dedicated network processor that forwards incoming data packets to the Routing Engine, and receives outgoing data packets from the Routing Engine. During this process, the PIM performs framing and line-speed signaling.

This PIM includes two physical Serial ports and a license for two physical interface ports.