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,
th e c o n tr o l s o f th e r e m ot e c o n tr o l u n i t a r e l o c a te d i n t h e li d o f t h e floor
housing). When the proceed-to-dial lamp in the calling key lights, dial the
number o f t h e d e sired su b s c r iber. When th e c o n n e ction i s e s t a b lishe 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 wil l there fore b e advis able to consu lt 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
co n necte d w ith eac h o ther. In this c ase eith er telep rinter i s starte d b y 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
30 seconds.
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)
Ateleprinter includes an answerback unit, adevice which automatically
transmits t he ide ntification co de of th e teleprinter s tati on.
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 t he dis tant tele printer. For this p urpose, d epre ss first the F IGS 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
