Table of Contents
Advertisement
Program
Actions
Chart BBl
•
B
•
c
•
0
•
E
•
F
•
G
•
H
•
J
•
K
OUTPUT
SET MODE
PCF=
I
START
TI ME-OUT
L2 INTERRUPT
/MODE CHG. I
OUTPUT
CHECK DSR
PCF:2
L2 INTERRUPT
!MODE CHG. I
OUTPUT
RCV MODE
PCF=7
START
TIME-OUT
L2 INTERRUPT
l
CHAR SVC
I
Program Actions
I
(Type 1 Scanner)
Hardware Actions
(Type 2 Scanner)
r
--- --- --- --
•
I
TIME FROM SET MODE
TO
SVC
REQUEST:
1
7.6
I .6
I
I
•
MS MAX
US MIN
SET
SVC
REQ
IN ICW
TI ME FROM RI SE
OF DATA SET
READY TO SVC
REQ:
7. 6
MS MAX
1
.6US MIN
SET SVC REQ
IN ICW
67.5 MS FROM START
BIT OF RCV CHAR TO
SVC
REQ
SET SVC REQ
IN ICW
2
•
•
PCF=2
WAIT FOR
INCOMING
CALL
RCV CHAR
/CIRCLE DI
882
83
I
Line Set and External
Modem Interface
--- ----
i-
--- --- --- ---
I
•
4
•
DATA TERM ROY,
>--""""-SD~F-=_0_2~0-------..ro~s~x~~~NAlN~[~~~:
START/STOP OR
SYNCHRONOUS
DATA SET IN AUTO ANSWER
MOOE. OATA TERMINAL
READY ALLOWS INCOMING
CALL TO BE ANSWERED.
INCOMING CALL,
> - - - - - - - - - 1 - - - - - - - - I O A T A SET READY
ON
TIME FROM DATA SET READY
ON TO BEGINNING OF FIRST
RCV CHAR:
3.68 SEC PLUS
MANUAL OPERATION OF
ORIGINATING MODEM ANO TIME
TO SEND CIRCLE
0
SOF=OO
LI NE INTERFACE
> - - - - - - - - - - - - - - - + !
TO RCV
SDF=OO
PDF:34 !CIRCLE
01
•
4
•
RCV
)CIRCLE
01
A
•
8
•
c
•
D
•
E
•
F
•
G
•
H
•
J
•
K
Figure 7.
Example
of Switched-Duplex Service-Programmed for the IBM 2741 Communications Terminal (Part 1of4)
Examples of Interface Sequences between the IBM 3704 and 3705 and the Communication Line 27
Advertisement
Table of Contents
