Cisco routers have two port adapter slots. The slots are numbered. It provides up to eight full-duplex serial interfaces for the Cisco 72Series routers. Find many great new & used options and get the best deals for Cisco VXR 6-Slot Chassis Series CiscoVXR *Free Shipping* at the best online. [HOST] › null › null › null › null › null › null. Cisco Series Routers and Cisco VXR Routers Slot Numbering. Cisco Series Routers and Cisco VXR Routers Slot Numbering. Cisco VXR routers have four slots for port adapters, and one slot for an input/output (I/O). . Cisco VXR Routers Slot Numbering. SKU: Part Number: NPE-G2. Cisco - CI/O-2FE/E - Cisco Input/Output Controller with Dual 10/ Ethernet ; Expansion Slots: 2 x PC Card ; Interfaces: 2 x Base-TX - RJ -. Product families: UBRVXR, UBRVXR. Controller card · CISCO. The eight-port adapter requires only a single slot in a Cisco. Cisco routers. Cisco VXR NPE-G2 Network Processing Engine. In Cisco series routers, port adapter slots are numbered from the lower left to the upper right, beginning with port adapter slot 1 and continuing through slot 2 for the Cisco , slot 4 for the Cisco and Cisco VXR, and slot 6 for the Cisco and Cisco VXR. Port Adapter Slots in the Cisco Series Router.