XRT74L73 Datasheet, PDF (448/488 Pages) Exar Corporation – 3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER

XRT74L73
3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
REV. P1.0.1
PRELIMINARY
tion of the Local Transmit E3 Framer block, which will
transmit an E3 frame to the Remote Terminal, with
the FEBE bit-field set to “0” . This signaling indicates
that the Local Receive E3 Framer has received an er-
ror-free E3 frame.
FIGURE 203. THE LOCAL RECEIVE E3 FRAMER BLOCK, RECEIVING AN E3 FRAME FROM THE REMOTE TERMINAL
WITH A CORRECT EM BYTE.
Local Terminal
Transmit E3
Framer
Receive E3
Framer
EM Byte
0x5A
0x5A
Locally Calculated
EM Byte
Remote
Terminal
FIGURE 204. THE LOCAL RECEIVE E3 FRAMER BLOCK, TRANSMITTING AN E3 FRAME TO THE REMOTE TERMINAL
WITH THE FEBE BIT WITHIN THE MA BYTE-FIELD SET TO “0”
Local Terminal
FEBE bit
x0xxxxxx
Transmit E3
Framer
Receive E3
Framer
MA Byte
Remote
Terminal
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