Receiving a Message from the Host System When the 
X.21 
Switched Network 
Is Installed 
1. 
When 
the host system operator wishes to send a 
message 
to a terminal, 
the 
message 
is 
received automatically and you do not 
have 
to 
be 
present 
if 
one 
of 
the following symbols 
is 
also 
displayed 
in 
the Operator Infor-
mation Area: 
a. 
Call 
Ready 
(--z-
) 
b. 
CaU 
Ready with Communication Error Reminder 
(~nn 
or 
~~5nn) 
c. 
Call 
Ready with 
Call 
Progress 
Signal 
( 
~Nnn 
) 
If the local symbol ( 
~"-
Cjq 
) 
is 
displayed, press the 
~ 
key, 
then the 
COMM 
key.  The 
Call 
Ready symbol ( 
---z-
) 
will 
be 
displayed. 
Notes: 
1. 
IfComm 
Check 
(--"-
.33,557, 
or 
5 
(::,-1 
) 
is 
displayed, 
the following steps are 
not 
possible. 
2. 
If 
you 
need to reject a call from the host system, press the 
~ 
key, 
and then the LOCAL key. 
The 
Local 
mode 
indicator 
(~qq 
or 
5(~l':::f) 
will be displayed in  the Operator Infonnation Area. 
Any 
incoming call from the host system while 
in 
local 
mode 
will be 
rejected. 
3. 
If 
the Local symbol 
(~(~lCj 
or  5 
(~1(.1 
) 
is 
displayed, press 
the 
~ 
key, then the 
COMM 
key.  The Call Ready symbol 
(-~ 
) will be displayed. 
2. 
When 
the incoming 
call 
is 
in 
process, the Incoming 
Call 
in 
Process symbol 
(  .. 
--z..-
) 
is 
displayed. 
When 
the network connection 
has 
been 
established, the 
In 
Use 
symbol (  N  ) 
is 
displayed, and the Incoming 
Call 
in 
Process symbol 
will 
disappear. 
3. 
Your application 
may 
require you to perform a logon procedure before 
you 
can 
enter data.  Perform the logon procedure 
if 
required. 
4. 
Key 
in 
the 
message 
data, and  press the ENTER key or the 
PF 
key specified 
for your application. 
5. 
Note the formatted display  or host-system response 
on 
your screen. 
If 
required, press  the 
RESET 
key and continue keying 
message 
data. 
Press 
the  ENTER or 
PF 
key when you 
have 
finished your 
message. 
6. 
When 
the data transmission 
is 
finished, the network 
is 
disconnected by: 
a. 
Pressing 
of 
the 
~ 
and 
DISC 
keys. 
b. 
A Disconnect command 
from 
the host system. 
c. 
A Clear Indication 
signal 
from  the network. 
d. 
An 
automatic timeout 
of 
the terminal. 
While 
disconnection 
is 
in 
process, the 
In 
Use 
symbol (  N  ) and the 
Disconnect 
in 
Process symbol 
(~):-
) 
are 
present.  They 
will 
disappear when  disconnection 
is 
completed. 
Note:  For items 
band 
c, 
the Clear Indication symbol 
(~ 
37 
or 
5 5 
'4 
) will be displayed. 
7. 
You 
are 
now 
free 
to send a 
new 
message 
or to 
receive 
a 
message 
from  the 
host. 
Chapter 4.  Features for the 3278 
4-31