Quidway? AR28 series routers adopt the modular structure, can provide abundant optional Smart Interface Card (SIC) and Multifunctional Interface Module (MIM) modules. Quidway? AR 28 series routers consist of 4 sub-series: AR 28-40/80, AR 28-30/31, AR 28-1x, AR 28-09. How to divide the sub-series lies on the difference of forwarding performance and interface number. All of the Quidway? AR 28 series routers based on the Huawei’s mature Versatile Routing Platform (VRP).