DS3161/DS3162/DS3163/DS3164
10.7.8 System Loopback............................................................................................................................... 145
10.8 DS3/E3 PLCP FRAMER.............................................................................................................................. 146
10.8.1 General Description ........................................................................................................................... 146
10.8.2 Features............................................................................................................................................. 146
10.8.3 Transmit PLCP Frame Processor...................................................................................................... 147
10.8.4 Receive PLCP Frame Processor....................................................................................................... 147
10.8.5 Transmit DS3 PLCP Frame Processor..............................................................................................147
10.8.6 Receive DS3 PLCP Frame Processor...............................................................................................150
10.8.7 Transmit E3 PLCP Frame Processor................................................................................................. 151
10.8.8 Receive E3 PLCP Frame Processor.................................................................................................. 154
10.9 FRACTIONAL PAYLOAD CONTROLLER............................................................................................................ 156
10.9.1 General Description ........................................................................................................................... 156
10.9.2 Features............................................................................................................................................. 156
10.9.3 Transmit Fractional Interface ............................................................................................................. 157
10.9.4 Transmit Fractional Controller............................................................................................................ 157
10.9.5 Receive Fractional Interface .............................................................................................................. 157
10.9.6 Receive Fractional Controller............................................................................................................. 157
10.10 DS3/E3 FRAMER / FORMATTER................................................................................................................... 159
10.10.1 General Description ........................................................................................................................... 159
10.10.2 Features............................................................................................................................................. 159
10.10.3 Transmit Formatter............................................................................................................................. 160
10.10.4 Receive Framer.................................................................................................................................. 160
10.10.5 C-bit DS3 Framer/Formatter .............................................................................................................. 165
10.10.6 M23 DS3 Framer/Formatter............................................................................................................... 167
10.10.7 G.751 E3 Framer/Formatter............................................................................................................... 170
10.10.8 G.832 E3 Framer/Formatter............................................................................................................... 172
10.10.9 Clear-Channel Frame Processor ....................................................................................................... 177
10.11 HDLC OVERHEAD CONTROLLER.................................................................................................................. 177
10.11.1 General Description ........................................................................................................................... 177
10.11.2 Features............................................................................................................................................. 178
10.11.3 Transmit FIFO.................................................................................................................................... 178
10.11.4 Transmit HDLC Overhead Processor ................................................................................................ 179
10.11.5 Receive HDLC Overhead Processor ................................................................................................. 179
10.11.6 Receive FIFO..................................................................................................................................... 180
10.12 TRAIL TRACE CONTROLLER.......................................................................................................................... 181
10.12.1 General Description ........................................................................................................................... 181
10.12.2 Features............................................................................................................................................. 182
10.12.3 Functional Description........................................................................................................................ 182
10.12.4 Transmit Data Storage....................................................................................................................... 182
10.12.5 Transmit Trace ID Processor............................................................................................................. 183
10.12.6 Transmit Trail Trace Processing........................................................................................................ 183
10.12.7 Receive Trace ID Processor.............................................................................................................. 183
10.12.8 Receive Trail Trace Processing......................................................................................................... 183
10.12.9 Receive Data Storage........................................................................................................................ 184
10.13 FEAC CONTROLLER ................................................................................................................................... 184
10.13.1 General Description ........................................................................................................................... 184
10.13.2 Features............................................................................................................................................. 185
10.13.3 Functional Description........................................................................................................................ 185
10.14 LINE ENCODER/DECODER............................................................................................................................ 186
10.14.1 General Description ........................................................................................................................... 186
10.14.2 Features............................................................................................................................................. 187
10.14.3 B3ZS/HDB3 Encoder ......................................................................................................................... 187
10.14.4 Transmit Line Interface ...................................................................................................................... 188
10.14.5 Receive Line Interface ....................................................................................................................... 188
10.14.6 B3ZS/HDB3 Decoder......................................................................................................................... 188
10.15 BERT......................................................................................................................................................... 190
10.15.1 General Description ........................................................................................................................... 190