3Com Router 5000 and Router 6000 v2.41Module Guide Table of Contentsviii4.19.5 Connecting the Interface Cable........................................................................... 4-604.20 Router 1-Port E1 Voice FIC ........................................................................................... 4-604.20.1 Introduction.......................................................................................................... 4-604.20.2 Interface Attributes .............................................................................................. 4-614.20.3 Panel and Interface LEDs ................................................................................... 4-614.20.4 Interface Cable .................................................................................................... 4-624.20.5 Connecting the Interface Cable........................................................................... 4-634.21 Router 1-Port T1 Voice FIC ........................................................................................... 4-644.21.1 Introduction.......................................................................................................... 4-644.21.2 Interface Attributes .............................................................................................. 4-644.21.3 Panel and Interface LEDs ................................................................................... 4-644.21.4 Interface Cable .................................................................................................... 4-654.21.5 Connecting the Interface Cable........................................................................... 4-654.22 Router NDEC2 Encryption Accelerator FIC................................................................... 4-664.22.1 Introduction.......................................................................................................... 4-664.22.2 Interface Features ............................................................................................... 4-664.22.3 Panel and LEDs .................................................................................................. 4-674.22.4 Troubleshooting .................................................................................................. 4-674.23 RPU2 Encryption Accelerator ........................................................................................ 4-684.23.2 Specifications ...................................................................................................... 4-694.23.3 LED and button ................................................................................................... 4-694.23.4 Interface .............................................................................................................. 4-704.23.5 Encryption daughter card .................................................................................... 4-70