Parameters 1 to 16 (except 9) are not configured if the values is 0. The different values must be taken from the following list:
1 ENQ
4 STX
7 ETB
10 DLE
2 NAK
5 SOH
8 PAD
11 ESC
3 EOT
6 ETX
9 ACK
12 BEL
Note This list of terminators is displayed using the command "T" at the recurrence class level. This command is proposed in the "HELP" menu of the configurator.
Configuration example:
Configure ENQ with permanent delimiters, STX with data frame start delimiters and ETX with data frame terminator.
parameter 1
: 1
parameters 2 to 5
: 0
parameter 6
: 4
parameters 7 to 8
: 0
parameter 9
: 0
parameters 10, 11
: 0
parameter 12
: 6
parameters 13 to 14
: 0
parameters 15, 16
: 0
parameters 17 to 21
: 0
Consult profile 100 of class 13 to see the values corresponding to the normal BSC protocol.
The parameters 17 to 21 configure the bi-character control frames beginning with the DLE character.
WABT is no a BSC frame but an MSV1 frame (subsequent use).
As soon as these delimiters are encountered, the frame is considered to be over (whatever the type of frame, whether data or control).
Delimiters are characterized by the fact that they can constitute the only character of a frame.
2. Data frame start delimiters (C13, P6 to 8)
As soon as these delimiters are encountered at the start of the frame, a data frame is recognized. This frame may be terminated only with a data frame end terminator or a permanent delimiter.
3. Data frame start delimiters with terminator inhibition (C13, P10 and 11)
These have, in every respect, the same role as the preceding delimiters, except that, during N (configurable C13 P9) first characters of the frame, all the end of frame terminators are inhibited (data frame end and permanent terminators).
This makes it possible to meet the case of frames beginning in particular with SOH followed by binary addresses that can take the value of terminators.
This possibility is not possible with the transparent BSC format (the transparency mechanism avoids the problem).
The same character can be a data frame start delimiter without inhibition and data frame start delimiter with inhibition.
4. Data frame end delimiters (C13, P12 to 14)
These delimiters makes it possible to terminate data frames, and only such frames, whatever the data frame start delimiter encountered. For frames beginning with a data frame start delimiter with inhibition, these terminators are active only after the Nth character received from the frame.
Note To manage transparency, the analysis is reproduced on the second character if the first is a DLE. The recognized frames to Transparent-BSC format must begin with DLE STX (DLE SOH no managed).
5. Bi-character control frames (C13, P17 to 21)
It is possible to configure the recognition of any number (including 0) of bi-character control frames from the following list: ACK0 (DLE 00), ACK1 (DLE 01), WACK (DLE,), RVI (DLE /), WABT (DLE ?).
6. Control frame end delimiter (C13, P15 to 16)
If the first character of the frame is not a data frame start delimiter (see preceding remark), nor a bi-character control frame, then the frame is terminated upon receipt of a control frame end delimiter.
