NO TRAFFIC WITHOUT AČCKNOWLEDGE
EOT EOT or EOT EOT ETX BCC

NO TRAFFIC WITH ACKNOWLEDGE"
SOH RID SID DID DLE 1 ETX Bec

ZtOVEST
Mao VETLANSN ITlO0Y S
REPLY REOUEST — > našla (omaro

SOH RID SID DID DLE ENO ETX BCC —-i—

WABT (BUSY)
SOH RID SID DID DLE? ETX BCC

REOUEST PROCESSOR MESSAGE (OR SPECIAL FUNCTION MESSAGEJ WITHOUT ACKNOWLEDGE
SOH RID SID DID BEL or 7 or G or W or g ETX BCC
RSS ETA Ne

Special Function Messages

REOUEST PROCESSOR MESSAGE (OR SPECIAL FUNCTION MESSAGE) WITH ACKNOWLEDGE" —WAIT
SOH RID SID DID DLE1 BEL bor 7 or G or W or g ETXBCC
Pepin ISAK

Special Function Messages

THRU WITHOUT ACKNOWLEDGE — DERDy (pe bvsy)
SOH RID SID DID DLE; ETX BCC

THRU WITH ACKNOWLEDGE
SOM RID SID DID DLE1 DLE; ETX Bec

RESPONSES TO STATUS POLL ONLY
; gt
4

TRAFFIC WITHOUT ACKNOWLEDGE
SOH RID SID DID DLEO ETX BCC

TRAFFIC WITH ACKNOWLEDGE?
SOH RID SID DID DLE 1 DLEO ETX BCC

RESPONSES TO TRAFFIC POLL ONLY

TEXT WITHOUT ACKNOWLEDGE
SOH RID SID DID STX TEXT ETX BCC

TEXT WITH ACKNOWLEDGE?
SOH RID SID DID DLE 1 STX TEXT ETX BCC

"WABT (DLE ?) may be sent instead of an acknowledgment (DLE 1) by a terminal that has received text correctly —
but cannot accept more text immediately. (See 3.3.3.2.) . s : 2186

x

%

TERMINAL ——)3 PROCESSOR