The Cisco T1 DSU/CSU WAN interface card is an integrated, fully managed Data Service Unit/Channel Service Unit (DSU/CSU) for T1 or fractional T1 service. It provides a cost-effective router-DSU/CSU combination with the following features: T1 or fractional T1 network interface; N X 64 kbps or N X 56 kbps non-channelized data rates (N = 1 to 24), and sandards-based, including ANSI T1.403 and AT&T Publication 62411.