IBM 2740-1 System Reference Manual page 41

Bid
© Enter
Key
Key
Term.
Text
In
Buffer
N O N -
SWITCHED
LINE
V 1 M
Mult.
Term
Polled
ö
B.
"E o'
§
(1) Operator can enter new data in buffer;
or(2) Can send data again by pressing Bid key only.
^D^Text^B^)
Text ©
q
( 1 ) ( )
1
Term
Polled
t-------------- -------------- \
Predetermined Number of
Retransmissions and
Message Still Incorrect
Enter Bid
Key Key ^D^Text ^
© K e y
+
Text
0
)
In
or
Buffer
(2)
-V—
Term
Polled
Enter Bid
( o ) T e x t ( T )
Key
Text
2
( )
In or
Buffer
(3)
- V —
Term
© W ® R
Polled
O
c