HP 2641A Reference Manual page 65

Data Communications
S,T
=
1,1
POWER ON (TRANS!
RECV STATE)
ANSWER (RECEIVE) ..... _ - - - - - - - - D 1 A L - U P (OR
HARDWIRE)
...- - - - - - - - - D C 2 (ENTER KEY)
..... _ - - - - - - - - E T X
S,T
=
0,1
POWER ON (TRANS/
RECV STATE)
ANSWER (RECEIVE) ..... - - - - - - - - - DIAL-UP (OR
HARDWIRE)
..... - - - - - - - - - D C 2 (ENTER KEY)
..... - - - - - - - - - E T X
ETX - - - - - - - - -. .
...- - - - - - - - - STX
..... I - - - - - - - - - - D A T A
..... - - - - - - - - - R S
..... I - - - - - - - - - - E T X
- - - - D A T A - - - - -
- - - - F O R M - - - - -
ETX -----------.IF~
USER FILLS
FORM
STX - - - - - - - - - _
DATA ----MENU-----4IF~
ETX - - - - - - - - - _ I F
...- - - - - - - - - D C 2 (ENTER KEY)
...- - - - - - - - - E T X
...- - - - - - - - - S T X
ETX - - - - - - - - -. .
FULL SCREEN
WITH MENU
SELECTION
_----DATA -----CR(LF)
-- - - -·DATA- - - - -CR (LF)
.. DATA CR(LF)
.. DATA CR (LF)
.. RS
.. ETX
.. DATA----US
__-----.DATA---- RS
..... f - - - - - - - - - E T X
NEXT
- - - - - F O R M - - - - -
ETX----------~
HALF DUPLEX MAIN CHANNEL PROTOCOL
WITH BLOCK MODE AND PAGE MODE ENABLED.
HALF DUPLEX MAIN CHANNEL PROTOCOL
WITH BLOCK MODE, PAGE MODE AND FORMAT MODE ENABLED.
S.T
=
1,0
POWER ON (TRANS!
RECV STATE)
ANSWER (RECEIVE) ..... - - - - - - - - - DIAL UP (ON
HARDWlRE)
..... - - - - - - - - - CR
..... - - - - - - - - - EOT
S,T = 0,1
POWER ON (TRANS/
REC STATE)
ANSWER (RECEIVE ..... _ - - - - - - - - D I A L UP (ON
HARDWIRE)
...- - - - - - - - - C R
. . . . . 1----------
ETX
STX----------~
- - -LOG ON PROMPT --~
ETX - - - - - - - - - - -
---LOG ON PROMPT---
E O T - - - - - - - - - - -
.. STX
.----LOG O N - - - - CR
.. ETX
~OG
ON DATA-- CR
.. EDT
HALF DUPLEX MAIN CHANNEL PROTOCOL USING LOG-ON
AS AN EXAMPLE (CHARACTER MODE).
HALF DUPLEX MAIN CHANNEL USING
lOG-ON SEQUENCE AS AN EXAMPLE (CHARACTER MODE).
5-18
Figure 5-7. Simple Data Transfers Using Main Channel Protocol