Husky Hunter - Page 350

CC11MUNICATIONS
SECTION 6. 7
6.7.6
6. 7. 6.1
VER.V09F
Fig 6.9 DATA UNK AOORTION ON NO RESPONSE (ERROR 02)
E s E E E E
TIC
N
T (TEXT) T (3 SEC RESPONSE
N
(3 SEC TIME
N 0
Q
X B TIMEOUT)
Q
OUT)
Q
T
RX A
NO RESPONSE NO RESPONSE
C
K
0
NOTE: HUNTER sends out 10 ENQs.
Fig 6.10 DATA LINK STALEMATE
E s E
TX
N T
(TEXT)
T
NO CONTINUATION
Q
X
B
RX A
A
C
C
K
K
0
1
NOTE:
Failure to receive further messages could be timed out by
the Basic applications program.
HUNTER/2780 SPECIFIC IMPLEHENTION FEATURES
The foregoing describes in general operations on the
communications line for 2780 protocol. HUNTER has particular
features and handling which may be important to users.
fuffer Operation
To implement this synchronous protocol it is necessary to use
buffering on transmit and receive so that error checking and
re-transmission can be performed.
To enhance throughput there are two buffers each for transmit
and receive, the operation of which is described below.
PAGE 6 - 27