CISCO HWIC-4T1E1 4 Port T1 E1 WAN CARD Features At-A-Glance • 4 ports of RJ-48 connectors • Cisco IOS® Software configurable for T1 or E1 operation • Integrated CSUDSU per port • Balanced or unbalanced E1 termination in the same module • E1 unframed and framed modes (Gmore...