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3 .
Establishing aconnection
Automatic exchange systems (selective dialing)
First depress the calling key Oof the remote control unit located adjacent
to your teleprinter, (If the teleprinter is accommodated in floor cabinet 213,
t h e c o n t r o l s o f t h e r e m o t e c o n t r o l u n i t a r e l o c a t e d i n t h e l i d o f t h e fl o o r
housing). When the proceed-to-dial lamp in the calling key lights, dial the
n u m b e r o f t h e d e s i r e d s u b s c r i b e r. W h e n t h e c o n n e c t i o n i s e s t a b l i s h e d , t h e
operation lamp in the clearing key Olights and the proceed-to-dial lamp
goes out. If the motor of your teleprinter stops again shortly after starting
and the operation lamp only lights momentarily, the line between the ex¬
change and the subscriber called is occupied.
To clear the line after transmission of the message, depress the clearing
key Oof your remote control unit until the operation lamp in this pushbutton
goes out.
3 , 1 ,
Manual exchange systems (no dial in the remote control unit)
Acall is initiated by depressing the calling key Oof the remote control
unit. When the motor of the teleprinter starts and the operation lamp in
the clearing key ©of the remote control unit lights, the operator in the
exchange has connected his teleprinter to your line. The exchange operator
will then answer your call and establish the desired connection. Do not
commence transmission of your message before the operator has asked
you
to do so.
At
the end of
message transmission, depress the clearing
key
in the remote
control unit
for about two seconds. Your teleprinter will
then be disconnected by the exchange operator.
The
procedure
of
establishing
and clearing aconnection may differ from
that
described
above, and it
will therefore be advisable to consult the
manual exchange to which you are connected.
3 , 2 ,
Point-to-point communication (no remote control unit)
Point-to-point communication implies that two teleprinters are permanently
connected with each other. In this case either teleprinter is started by de¬
p r e s s i n g t h e LT R S s h i f t k e y m a r k e d " A , ,
automatically stopped when no signals have been transmitted for about
3 0
s e c o n d s .
3 , 3 ,
t w i c e . B o t h t e l e p r i n t e r s a r e
Checking the connection (exchange of answerback codes)
A t e l e p r i n t e r i n c l u d e s a n a n s w e r b a c k u n i t , a d e v i c e w h i c h a u t o m a t i c a l l y
transmits the identification code of the teleprinter station.
To verify whether, when the connection has been established, you are ac¬
tually in contact with the desired distant station, release the answerback
unit of the distant teleprinter. For this purpose, depress first the FIGS shift
key marked "1,,," and then the key marked
T h e
i n c o m i n g
s t a t i o n
identification code tells you whether you are connected with the desired
3 , 4 ,
4
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