Driven by a powerful CPU processor along with high-performance DSPs and auxiliary processors on various interfaces, the Cisco 2600 Series supports the advanced QoS, security, and network integration features required in today's evolving branch offices.Cisco 2651 supports one Network Module (NM) slot, two WAN Interface Card slots, and one AIM slot. These slots share more than 50 different modules across four Cisco product lines - the Cisco 1700 Series, the Cisco 2600 Series, the Cisco 3600 Series and the Cisco 3700 Series. In addition, support for an AC, DC or RPS (requires the PWR600-AC-RPS-NCAB or the PWR600-DC-RPS-CAB) models are offered for the Cisco 2651 series.