6100 BSC Programming Manual

6100 BSC Concepts and Context
S5066-008
PAD SYN...SYN ID ACK0 PAD
2–15 Characters
PAD SYN...SYN ID ENQ PAD
2–15 Characters
Calling Station:
Called Station:
Application-Supplied
BSC-Supplied
Figure 1-8. ID Exchange
The called station normally replies:
SYN SYN ... SYN id ACK 0 PAD
The underscore shows the contents of the application buffer.
This sequence identifies the called station and says that the
station is ready to continue. In ASCII, ACK 0 is a DLE character
(10 hexadecimal) followed by a "0" (30 hexadecimal); in EBCDIC,
ACK 0 is a DLE character followed by 70 hexadecimal.
NOTE
To produce ACK 0 in EBCDIC, the application puts in its
buffer the sequence 10 BA hexadecimal. In translating
the sequence from ASCII to EBCDIC, BSC translates the
10 to a 10, the BA to 70 hexadecimal.
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