The Channelized T3 Interface Module is an advanced multi- channel T3 interface module for the Cisco 10000 ESR. Six-Port Channelized T3 Interface Modules support maximum flexibility and can be used in any Cisco 10000 ESR interface card slot. All cards are hot swappable. The Cisco 10000 ESR Six-port Channelized T3 card supports six T3 physical connections with each T3 capable of supporting a full "clear channel" DS3 or be channelized into 28 independent DS1 data channels with each of the DS1 channels capable of being further channelized down to DS0s. Each Cisco 10000 ESR Six-Port Channelized T3 Interface Module supports up to 168 DS1 connections, 768 DS0s, or any combination of T1, T3, and DS0, up to 768 channels. A fully configured Cisco 10000 ESR with seven Channelized T3 modules and one uplink module can support up to 42 T3s or 1176 T1s per chassis, or up to 126 T3s or 3528 T1s per seven-foot rack.