Cisco routers have two port adapter slots. 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. The slots are numbered. It provides up to eight full-duplex serial interfaces for the Cisco 72Series routers. Port Adapter Slots in the Cisco Series Router. The eight-port adapter requires only a single slot in a Cisco. Cisco Series Routers and Cisco VXR Routers Slot Numbering. SKU: Part Number: NPE-G2. Cisco VXR routers have four slots for port adapters, and one slot for an input/output (I/O). Product families: UBRVXR, UBRVXR. Cisco Series Routers and Cisco VXR Routers Slot Numbering. Controller card · CISCO. Cisco VXR Routers Slot Numbering. Cisco VXR NPE-G2 Network Processing Engine. 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 -. Cisco routers. . 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.