Teletype 32 Operation

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TELETYPE CORPORATION
Skokie, Illinois,
u .s.
A .
SECTION 574-123-lOlTC
Issue 2, October, 1964
32 AND 33 CALL CONTROL UNIT
PRINCIPLES OF OPERATION
CONTENTS
PAGE
1. GENERAL .................. .
2. CALL CONTROL UNIT - WESTERN
UNION "TELEX" SERVICE ... . .. .
OPERATION .. . ............. .
A. General . ... .......... .. .
B. Neutral Signaling Condition ... .
C. Polar Signaling Condition .... . .
POWERSUPPLY ........... . . .
LOCAL-REMOTE CONTROL
CIRCUITS .. .... ............ .
2
3
3
3
3
5
5
6
A. General . . . . . . . . . . . . . . . . . 6
B. Proceed-to-Dial Circuit . . . . . . 6
C. Connect Circuit . . . . . . . . . . . . 7
D. Local Circuit. . . . . . . . . . . . . . 9
E. Circuit Interconnections . . . . . . 10
F.
Idle Line Condition . . . . . . . . • .
11
G. Initiating a Cali . . . . . . . . . . . . 11
H. Connection . . . . . . . . . . . . . . . 13
1. Disconnect . . . . . . . . . . . . . . . 14
J. Local Off-Llne Ope r ation. . . . . . 14
SELECTOR MAGNET DRIVER . . . • . 14
MOTOR DELAY TIMER. . . . . . . . . . 15
POLAR ADAPTER . . . . . . . . . . . • . 17
A. General . . . . . . . . . . . . . . . • . 17
B. Receiving Polar Relay. . . . . • . . 17
C. Sending Polar Relay . . . . . . • . . 18
D. Connect Control T imer . . . . . . . 18
E. Current Amplifier . . . . . . . • . . 21
F.
Circuit Interconnections . . . • . . 21
G. Idle Line Condition. . . . . . . • . . 21
H.
Initiating
a
Call . . . . . . . . . • . . 21
I. Proceed -to-Dial. . . . . . . . . . . . 24
J.
Dialing. . . . . . . . . . . . . . . . . . 24
K. Call Connection . . . . . . . . • . . . 24
L. Remote Connection . . . . . • . . . . 24
M. Call Disconnect . . . . . . . . . . . . 25
N. Remote Disconnect. . . . . . . . . . . 25
0. Local Off-Line Operation. . . . . . 25
CONTENTS
3. CALL CONTROL UNIT - BELL
SYSTEM SWITCHED NETWORK
PAGE
SERVICE . . . . . . . . . . . . . . . . . . . 25
OPERATION . . . . . . . . . . . . • . . . . 25
A. General . . . . . . . . . . . . . . . . . 25
B. Power Requirements. . . . . . . . . 26
PROGRESS OF A CALL. . . . . • . . . . 26
DISCONNECTING A CA LL . . . . . . . . 26
ANSWERING A CALL . . . . . . . . . . . 27
A. Manual Answering . . . . . . . . . . 27
B. Automatic Answering . . . . . . . . 27
LOCAL MODE . . . . . . . . . . . . . . . . 27
"OUT OF $ERV." SWITCH . . . . . . . . 27
LOW-PAPER ALARM. . . . . . . . . • . 28
RESTRAIN LAMP . . . . . . • . . . . . . . 28
TEST MODE . . . . . . . . . . . . . . . . . 28
SIGNAL GENERATION . . . . . . . . . . 29
SELECTOR MAGNET DRIVER . . . . . 29
A. General . . . . . . . . . . . . . . . . . 29
B. Circuit Description. . . . . . . . . . 29
SPEAKER AMPLIFIER SYSTEM . . . . 30
DIALER MECHANISMS . . . . . . . . . . 31
A. Pulsing Rotary Dialer . . . . . . . . 31
B. Pulsing Card Dialer
(40A Dialer) . . . . . . . . . . . . . . 31
C. Pulsing Card Dialer
(41A Dialer) . . . . . . . . . . . . . . 32
D. TOUCH-TONE Dialer. . . . . • . . 33
E. TOUCH- TONE and Card
Dialer . . . . . . . . . . . . . . . . . . 35
4. CALL CONTROL UNIT - PRIVATE
WIRE SERVICE . . . . . . . . . . . . . . . 36
OPERATION . . . . . . . . . . . . . . . . . 36
POWER SWITCH . . . . . . . . . . . . . . 36
© 1962 and 1964 by Teletype Corporation
All rights reserved.
Printed in U.S. A.
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