Message de l'hôte vers l'IMP

            +--------------+
            | START OUTPUT |
            +------+-------+
                   V
       +------------------------+
       | COUNTER <-- 1          |
       | LSTWD <--0; BTAVL <--0 |
       +-----------+------------+        +---+
                   |<--------------------| C |
                   V                     +---+
       +-----------+------------+
       |    OUT REQST <-- 1     |
       |     CLEAR SHIFT REG.   |
       +-----------+------------+
     +------------>|
     |             V
     |            / \
     |      N   /     \
     |_______ / STROBE  \
              \DATA WORD/
                \ =1 ?/
                  \ /
                   V  Y
      +------------+------------+
      |  LOAD SHIFT  REGISTER   |
      |  OUTREQST <-- 0         |
      |  COUNTER  <-- 1         |
      +-------------------------+
      +---------->|
      |           V
      |          / \
      |        /     \
      |N     / RFNBIT  \
      +----- \   = 1   /
               \   ? /            +----------+
                 \ /              |          | N
                  V   Y           |         / \
         +--------+--------+      V       /     \
         |  THERE'S YOUR   |----------->/ RFNBIT  \
         | HOST BET <-- 1  |            \  = 0    /
         +-----------------+              \  ?  /
                                            \ /
                                             | Y
                                           +-+-+
                                           | A |
                                           +---+

                               +---+
                               | A |
                               +---+
                                 V
                  +--------------+-------------+
                  | THERE'S YOUR HOST BIT <--0 |
                  |      BTAVL <-- 0           |
                  +----------------------------+
                                 V
                                / \                   / \
                              / WORD\   Y           /     \   Y
                            /LENGTH -1\---------->/  LSTWD  \---+
                            \   = 1   /           \   = 1   /   |
                              \  ?  /               \  ?  /     |
                                \ /                   \ /       |
                                 | N                   | N      |
                                 V                     |        |
                                / \                    |        |
                              / WORD\                  |        V
           ________________ / LENGTH  \                |  +------------+
           |                \  = 1    /                |  | LIBIT <- 1 |
           |                  \  ?  /                  |  +------------+
           |                    \ /                    V        |
           |                     |<-----------------------<------+
           |                     V
           |            +-----------------+
           |            | PUSH SHIFT REG. |
    +-------------+     |INCREMENT COUNTER|
    | LIBIT <-- 0 |     +-----------------+
    +-------------+              V
           |                   +---+
           |                   | B |
           V                   +---+
          / \
        /     \
      /  LSTWD  \ Y                          +-------------+
      \   = 1   /--------------------------->|   END OF    |
        \  ?  /                              |   MESSAGE   |
          \ /                                +-------------+
           | N
           V
         +---+
         | C |
         +---+

---

Note : Ce RFC a été mis sous forme lisible par machine pour être entré dans les archives RFC en ligne par Lorrie Shiota.